Yunny Meas

• PhD
• Managing Director at Center of Research and Technologic Development in Electrochemistry

Resumen En este trabajo se presenta un estudio integral y sustenta-ble para el tratamiento de aguas contaminadas con plomo a través de la fitorremediación, que involucra el acopla-miento de procesos biológicos, químicos y electroquími-cos. El estudio se realizo en tres etapas: i) bio-absorción de Pb, usando plantas del lirio acuático, ii) lixiviaci...

This work proposes for the first time protecting–reflecting on both sides of plated mirrors and a solution to polycarbonate surface vulnerability to weathering and scratching using tungsten disulfide (WS2) by mechanical polishing. The ability of the dynamic chemical plating (DCP) technique to deposit Ag films at the nanometer scale on a polycarbona...

Dr. Yunny Meas tells us about his participation in the development of electrochemistry in Mexico, from his beginnings as a guest researcher at CINVESTAV in 1978, through a short period at UNAM and a prolonged period at UAM-Iztapalapa, to the current creation and maturation of CIDETEQ. He relates his professional experiences with each stage's politi...

In the present work, treatability studies were carried out with oil refinery wastewater (effluent from the secondary treatment) using electrooxidation (EO) process employing two mixed oxide anodes: SnO 2 ‐RuO 2 ‐IrO 2 |Ti and IrO 2 ‐Ta 2 O 5 |Ti. Both electrodes’ performance were compared by their capacity to generate active chlorine in a synthetic...

Simple Summary Electrochemically activated salt solutions (EASSs) are widely used as surface disinfecting agents with low cost and high efficiency, because they are a safe option for those having contact with the solution. Following this logic, the solutions may be useful for inhibiting pathogens affecting plants in agricultural systems. Some tests...

Common bean (Phaseolus vulgaris L.) is an important crop for food security and for national economics for several countries worlwide. One of the most important factors of risk in common bean production is the fungal disease anthracnose caused by Colletotrichum lindemuthianum, which in some cases, causes complete yield losses; this kind of plant dis...

Coagulation/flocculation (C/F) and electrocoagulation (EC) are physicochemical technologies that can be used for oil recovery and the removal of suspended and dissolved contaminants from petroleum industry effluents. C/F has been widely used as a secondary oil/water separation stage of the primary treatment, demonstrating its effectiveness for remo...

The effect of UVC light (λ = 254 nm) on chlorine generation through a sequential combination of three wastewater treatments was evaluated to disinfect and mineralize carwash wastewater. Electrocoagulation, electrooxidation, and catalysis processes were sequentially performed in the presence and absence of UVC radiation. Toxicity changes during the...

This study shows a multilayer system based on samarium compounds as a corrosion inhibitor and a continuous SiO2 layer by atmospheric pressure plasma jet (APPJ) as a protective barrier for aluminim alloy AA3003. One of the main advantages of this new coating is that it does not require vacuum chambers, which makes it easy to incorporate into product...

Conventional peroxi-coagulation process is based on the combined occurrence of electrocoagulation and oxidation in a single unit, since H2O2 and Fe2+ are electrogenerated on site from cathodic and anodic reactions, respectively. The present work aims to evaluate the effect of pH and applied current on the generation of hydroxyl radicals (●OH) from...

The lifetime of mirrors in outdoor conditions is crucial in the correct operation of any concentrating solar power (CSP) installation. In this work, the corrosion behavior of two types of metallized surfaces was studied. The first was made of a flexible polymer having a deposited reflective silver metallic film. The second was made of the same surf...

The formation of cerium hydroxide was studied, and its capacity as a corrosion inhibitor on aluminum substrates was evaluated. These particles were deposited by immersing the substrate in a bath with cerium nitrate and hydrogen peroxide. Four different immersion times were used to determine the differences in behavior from low concentrations to an...

Corrosion is one of the main problems in materials science that represents a high cost to the world economy. Rare earth elements have attracted attention as corrosion inhibitors due to their excellent results and being environmentally friendly. Although its mechanism of action continues to be studied, the most accepted theory indicates that corrosi...

One of the most widely used antibiotics is amoxicillin (AMX), which is the most widely used in humans and animals, but it is discharged metabolically due to its indigestibility. Conventional biological and physicochemical methods for removing AMX from water are not enough to mineralize it; it is only concentrated and transferred to produce new resi...

The effect of boric acid, sodium nitrate, and sodium dodecyl sulfate (SDS) on hydrogen permeation behaviors during the nickel electroplating was investigated using Devanathan–Stachurski method. The results demonstrated that the hydrogen permeation amount decreased with the increased addition of the H3BO3 and NaNO3 concentrations in the nickel elect...

Photo-electrocoagulation with aluminum electrodes is becoming an increasingly attractive process for the degradation of organic pollutants in low concentration levels, such as those found in secondary effluents (biological processes). The technological potential of this approach relies on the synergistic effect of the electrochemical generation of...

One of the most widely used antibiotics is amoxicillin (AMX), which is the most widely used in humans and animals, but it is discharged metabolically due to its indigestibility. Conventional biological and physicochemical methods for removing AMX from water are not enough to mineralize it, only it is concentrated and transferred to produce new resi...

The evaluation of the corrosion resistance of titanium with a TiO2 nanotubes top layer was carried out (TiO2 NT). These nanostructures were evolved into anatase nanoparticles without heat treatment in an aqueous medium, which is a novel phenomenon. This work analyzes the layer between the nanotube bottom and the substrate, which is thin and still s...

This review focuses on recent developments in electrochemical technology (with special emphasis on electrocoagulation, electrooxidation, and electro-Fenton) to treat petroleum industry effluents (offshore and hydraulic fracturing extraction, and refinery effluents). Also, an overview is given of what these processes face to position themselves as c...

Biofilms on food-contact surfaces can lead to recurrent contamination. This work aimed to study the biofilm formation process on stainless steel plates used in the dairy industry: 304 surface finish 2B and electropolished; and the effect of a cleaning and disinfection process using alkaline (AEW) and neutral (NEW) electrolyzed water. Milk fouling d...

A methodology that starts from the acquisition of real prototype geometries up to simulations to evaluate parameters, improvements, or performance under various conditions is proposed. The authors show a case study of a refrigerator with storage capacity for 50 kg of fruit solar-powered by photovoltaic panels, which reach a temperature of about 4°C...

The atmospheric pressure plasma jet (APPJ) has received attention in recent years due to its ease of incorporation into production lines, rapid application, low surface damage and use in a wide variety of materials (cardboard, textiles, metals, polymers and glass) and for being a more environmentally friendly technique than wet chemical techniques....

Electro-Fenton (EF) based water treatment processes using activated carbon (AC) packed beds constitute an attractive approach for the development of competitive degradation technology of persistent pollutants in aqueous effluents. In this work, the results of a study aimed to assess the effect on the EF performance of different parameters of the re...

Salmonella is the most common pathogen in poultry associated to foodborne outbreaks. There is concern about the use of sodium hypochlorite (NaClO) during antimicrobial interventions in broiler chickens processing, due to trihalomethanes (THMs) generation through oxidation of organic matter. In this study, we showed the effectiveness of neutral elec...

In an impressed current cathodic protection system (ICCP) to protect structures against corrosion, the efficient operation depends on the proper selection of the electrodes, particularly the anode, chosen considering the structure to be protected and the environment in which it is located. The nature and overpotential of the anodic reaction determi...

The degradation of organic pollutants in water by electro-oxidation (EO) process is a very active research topic, but it has been pre-eminently focused on the development of anodes with enhanced electrocatalytic ability to produce OH at their surface. Conversely, the degradation pathways that may arise from the potential OH production at the cathod...

The surface modification of copolymer substrates of Acrylonitrile-Butadiene-Styrene (ABS) is significant for the electroplating industry. The sulfuric-chromic acid bath, used in the Electroless process, conditioning the ABS surface by selective oxidation of poly(butadiene) creating interconnected micro-holes, which allows an excellent mechanical ad...

In this research work, Co-B/SiC composite coatings were synthesized by electrochemical deposition from colloidal suspensions with different content of SiC. The Co-B/SiC films obtained were heat treatment at 350 °C. The composition, morphology, and structure of the Co-B/SiC composite coatings were analyzed using glow discharge spectrometry (GDS), sc...

In the present paper, Co-B/SiC composite coatings were obtained via electrodeposition from colloidal suspensions with different concentrations of SiC particles and subsequent heat treatments at 350 °C. The composition, morphology and structure of the Co-B/SiC composite coatings were analyzed using glow discharge spectrometry (GDS), scanning electro...

In this chapter, a methodology that starts from the measurement and recording of real prototype geometries up to simulations to evaluate parameters, improvements, or performance under various conditions is proposed. Here a case study of a solar powered refrigerator with storage capacity for 50 kg of fruit is presented. The refrigerator comprises tw...

Multilayer coatings having a thickness of 18–22 μm consisting of different Ni, Ni-B alloys and Ni-B-PTFE composite layers were produced on steel by combining electroplating with electroless dynamic chemical plating (DCP). The individual Ni layers and the multilayer coatings (Ni/Ni-B and Ni/Ni-B/Ni-B-PTFE) were characterized by scanning electron mic...

Cobalt-boride (Co-B) alloy coatings with different boron contents (7.31-15.33at.% B) were electrodeposited onto an AISI 1018 steel electrode using dimethylamine borane (DMAB) as the boron source and then heat treated at various temperatures ranging from 200 to 500°C for 60min under air atmosphere. The composition and morphology of the coatings were...

During the nickel electrodeposition process, secondary reactions corresponding to the reduction of a proton to H ads and the evolution of molecular hydrogen occur. The H ads could be absorbed and diffused in the substrate. In this work, we studied the effect of samarium on the process of hydrogen permeation that carries out during the electrodeposi...

In this study, we evaluate for the first time the effect of ionic composition on the anodic production of hydroxyl radical ([rad]OHa) during electrocoagulation (EC) process in batch using carbon steel electrodes. Likewise, hydroxyl radical production from active chlorine ([rad]OHph) electrogenerated in EC photoassisted with UVA (λ = 365 nm) and UVC...

Herein we report the synthesis of efficient Co3O4 electrocatalysts toward the oxygen evolution reaction (OER) in alkaline media. Co3O4 films were obtained by thermal treatment of Co electrodeposited from electrolytic solutions containing glycine at different pH values. Co3O4 films were characterized by X-ray diffraction (XRD), scanning electron mic...

Herein we report the synthesis of efficient NiO electrocatalysts towards the oxygen evolution reaction (OER) in alkaline media. NiO films were obtained by thermal treatment of Ni electrodeposited from electrolytic solutions containing glycine at different pH values. NiO films were characterized by X-ray diffraction (XRD), scanning electron microsco...

In the present work, nickel-samarium coatings (Ni-Sm) with 1.88% of samarium were obtained by electrodeposition from a nickel electrolyte composed of (NH2HSO3, Ni(CO3)2 and H3BO3) and containing Sm2(SO4)3. The electroactivity intervals of each component of the electrolytic bath and the effect of samarium (III) on the nickel electroplating process w...

The photochromism of poly methyl methacrylate–TiO2 composites have been investigated in this research. Amorphous titanium oxide was synthesized by sol–gel using titanium isopropoxide. The titanium solution was mixed with a dissolved polymer. The composite shows photo-response under UV radiation by changing, generally, to a dark brown tonality. This...

The use of solar energy as a renewable source is one of the most promising resources to generate electricity. The viability of concentrating solar power (CSP) systems depends on the development of highly reflective materials that are inexpensive and maintain their optical properties for extended lifetimes under outdoor environments. In this chapter...

In this work, titanium dioxide nanoparticulate nanotubes (NP-NT) in anatase phase from ammonium oxyfluorotitanate nanotubes (NT NH4TiOF3) are shown. The NT were formed from anodized titanium (Ti) in an organic medium. These nanostructures had an internal diameter of 90–120 nm and a nanotube wall thickness of 15–20 nm obtained by anodizing Ti, which...

In the dairy industry, cleaning and disinfection of surfaces are important issues and development of innovative strategies may improve food safety. This study was aimed to optimize the combined effect of alkaline electrolyzed water (AEW) and neutral electrolyzed water (NEW) as alternative cleaning and disinfection procedure on stainless steel plate...

The phenomenon of decolourization of MO was observed when NH4TiOF3 nanotubes, in water, underwent a transformation toward anatase due to the effect of hydroxyl radicals. NH4TiOF3 nanotubes were synthesized using the electrochemical anodization method of titanium. They react within an aqueous solution producing nanoparticulated nanotubes formed of a...

Graphene, a material composed of one-atom-thick planar sheets of sp 2 -bonded carbon atoms with a two-dimensional honeycomb structure, has been proposed for many applications due to its remarkable electronic, optical, thermal, and mechanical properties. Its high transparency, conductivity, flexibility, and abundance make it an excellent material to...

During the crude oil refining process, NaOH solutions are used to remove H2S, H2Saq, and sulfur compounds from different hydrocarbon streams. The residues obtained are called “spent caustics”. These residues can be mixed with those obtained in other processes, adding to its chemical composition naphthenic acids and phenolic compounds, resulting in...

Stable suspensions of Ag particles were prepared using cetylpyridinium bromide (CPB) as a surfactant. The stability was evaluated using a Turbiscan optical analyzer, and the delta transmittance data showed that increasing the concentration of CPB in the suspensión significantly enhanced the stability. Additionally, for CPB concentrations in the ran...

The water and carbon footprint of the presented dried tomato value chain is compared to the conventional process. The coupling of pre- and post-harvest processes, namely growing and drying respectively, is analyzed for resource consumption optimization. The growing system of tomatoes (Solanum lycopersicon L. cv, Pannovy) in an energy efficient gree...

This research evaluated two electrokinetic remediation systems (EKR) for separating phenanthrene from bentonite and its electrochemical destruction by using a Boron Doped Diamond (BDD) electrode. The effect of the electrochemical potential for the oxidation of phenanthrene in liquid phase with Ti/BDD was analyzed by Normal Pulse Voltammetry and Hyd...

Dynamic Chemical Plating “DCP” is an alternative for producing metallic deposits on nonconductive materials and can be considered as a modified electroless coating process. This article describes the formation of composite NiB-particle films by the Dynamic Chemical Plating “DCP” technique. The particles used were micrometric graphite (1-2 micron) o...

The dynamic chemical plating technique is used to deposit NiBP coatings with incorporation of PTFE particles. This technique is faster and simpler to perform compared to other electroless deposition techniques. Using a double nozzle gun, metal salt solution and reducing agents are sprayed to the surface, forming a deposit. Using Scanning Electron M...

The effects of several quaternary ammonium compounds on electrodeposition of zinc onto AISI 1018 carbon steel were studied in an alkaline zincate electrolyte. Tetraethylammonium, tetrabutylammonium, N-benzyltriethylammonium and N-benzyl-3-carboxyl pyridinium cations were examined. The electrochemical behavior and the inhibition of dendrite formatio...

The use of solar energy as a renewable source is one of the most promising resources to generate electricity. The viability of concentrating solar power (CSP) systems depends on the development of highly reflective materials that are inexpensive and maintain their optical properties for extended lifetimes under outdoor environments. In this chapter...

In the drying value chain for fruits and vegetables, nine sub-processes have been identified. This work analyses the interaction between growing in greenhouses and drying sub processes for exergy and water flow reutilization. By thermodynamic model simulation, wet air from drying process is retrieved back to the crops within greenhouses. This inter...

Electrodeposition of metals and alloys is currently carried out from aqueous solutions despite the environmental problems associated to the complex baths needed to obtain electrodeposits with controlled properties (composition, roughness, etc). In this context, ionic Liquids (IL) are studied as an option to be used as new green solvents for electro...

In this work, cyclic voltammetry and electrochemical impedance techniques were used to study the effect of Sm ⁺³ dissolved in the electrolytic bath, on nickel reduction process. The results obtained by cyclic voltammetry showed that, during nickel electroplating without Sm ⁺³ , three reduction processes were observed and they may be related to the...

This work shows the growth of TiO 2 nanotube by anodizing of surfaces metallic titanium and its features as surface. The material used was titanium industrial plates (99 %). The baths were constituted by 98% v/v of ethylene glycol, 2.5 ppm of O 2 (water as a source), 1,700 ppm of F ⁻ , and a pH of 6.6. The concentrations of O 2 were oscillating bet...

Electrochemical Method for deposit particles on a Niquel- Phosphorous solution for improve wear resistance

Purpose – This paper aims to coat ternary composite NiBP-graphite films by Dynamic Chemical Plating “DCP” technique with a growth rate of at least 5 μm/h, which makes this technique a worthy candidate for production of composite films. Electroless nickel plating method can be used to deposit nickel–phosphorous and nickel–boron coatings on metals or...

The preconditioning of an ABS surface prior to metallization was achieved by a new technique, here named “optophysic treatment.” The dry procedure consists of alternating corona discharges and UV. The substrates are metallized by either the electroless or dynamic chemical plating (DCP) method. The surface modification is attributed to capture-relea...

This chapter shows results related to synthesizing hybrid materials composed of polymer matrix/nano-TiO2, which possesses a photochromic property under UV irradiation. The synthesized TiO2 was amorphous, but, for the hybrid photochromic response, the required illumination is that with the same or superior energy than semiconductor bandgap. Moreover...

The presence of Listeria monocytogenes in food processing environment is a risk of food contamination by persistent cells due to their ability to attach to stainless steel and other surfaces. We aimed to study biofilms formation of lux-tagged L. monocytogenes EGDe on stainless steel surfaces and their control using neutral electrolyzed water (NEW),...

C-sp 2 (graphite) impurities are undesirable in syn-thetic diamond electrodes (C-sp 3), because they can affect the electrochemical response. In this work, we demonstrate that C-sp 3 surfaces can be activated successfully by applying an anodic current density corresponding to sufficiently high po-tential where the hydroxyl radicals (● OH) are gener...

This paper describes the effects of heat treatment on the electrochemical behavior and tribological characteristics of NiP (10.65 at.% P) composite coatings. The deposits were obtained via electrodeposition onto an AISI 1018 steel electrode and then heat treated at various temperatures ranging from 200 to 600 °C for 60 min in air. The tribological...

Ni electrodeposition from a protic ionic liquid based on carboxylated anions, 2-hydroxyethyl ammonium formate (2HEAF), was studied in order to evaluate the feasibility to obtain deposits with well-controlled properties and also to determine the influence of the electrodeposition conditions on these properties. Results show that nickel is electrodep...

This work studied the effect of the addition of samarium (III) on the corrosion resistance of nickel coatings obtained from a sulfamate bath. The coatings obtained were characterized by X-ray diffraction and scanning electron microscopy (SEM). The corrosion resistance of the coatings was evaluated in 5% NaCl, employing electrochemical polarization...

Electrochemical incineration using boron-doped diamond electrodes was applied to samples obtained from a refinery and compared to the photo-electro-Fenton process in order to selectively eliminate the phenol and phenolic compounds from a complex matrix. Due to the complex chemical composition of the sample, a pretreatment to the sample in order to...

An IrO2 catalyst was prepared using a colloidal method followed by a thermal treatment. The catalyst was later mixed with Pt-Black and supported on the Sb-doped SnO2 (ATO), synthesized through the same colloidal method. ATO was investigated as a possible catalyst support in an electrode of a regenerative fuel cell (URFC), where Pt–IrO2 was used as...

Raman spectroscopy complemented by cyclic voltammetry was used to provide some insight towards understanding the interaction between Benzylideneacetone (BDA) and the substrate electrode. It was verified that the adsorption of BDA on the surface of an Ag electrode moderately inhibits the Zn underpotential deposition (UPD). It was observed that BDA d...

Raman, IR and NMR spectra were measured in order to elucidate the role of 4-phenyl-3-buten-2-one in zinc electroplating. First, solutions of this compound dissolved in methanol and methanol/water mixtures were studied. NMR data show that the solvation was caused by Van der Waals forces. Density functional theory calculations were performed to suppo...

This work reports the effects of four organic compounds (referred to as levelers) on the electrodeposition of Zn on steel from alkaline free-cyanide electrolytes. The additives tested included polyvinylalcohol (PVA) and the condensation products of epichlorhydrin with amines, called polyamines (PAs), that were synthesized using an aliphatic amine (...

The adsorption of polyethylene glycol (MW 20,000) (PEG(20000)) in the presence of Cl- ions onto a polycrystalline gold electrode was studied using a quartz crystal microbalance, AC voltammetry, and chronocoulometry. This study provided new physical insights into the adsorption behavior of this polymer in the presence of chloride ions on a solid ele...

The acrylonitrile-butadiene-styrene (ABS) is the most commonly used copolymer in industry for metallizing. The process in solution used for depositing metallic films on non-conductive substrates is known as electroless, which is an autocatalytic procedure. However, the sulfo-chromic admixture used to modify the ABS surface, in the first step of thi...

A thermodynamic study of the aqueous copper(II)-tartrate-chloride system is presented in this work with the view to better understand the electrodeposition of copper from a non-cyanide alkaline solution. Additionally, an electrochemical study onto the initial stages of copper electrodeposition on glassy carbon electrode (GCE) is presented in this w...

Introduction Ozone Technologies for Producing Ozone Reaction Mechanism for the Production of Ozone with Boron-Doped Diamond Conclusions References

The effects of vanillin and anisaldehyde on electrodeposition of zinc–cobalt alloys onto AISI 1018 carbon steel were studied in an alkaline gluconate zincate electrolyte. The influence of an additive on the metal discharge depends on the structure of the added molecule and on the nature of the substrate. The composition of the deposit varies during...

In this work we present an electrochemical study of the underpotential deposition (UPD) and overpotential deposition (OPD) of zinc onto nickel electrode (NE) from a non-cyanide alkaline solution containing glycine. The studied parameters were zinc concentration, glycine concentration and scanning rate. The analysis of the experimental data clearly...

A thermodynamic study by means of potential-pH (Pourbaix type) and species repartition diagrams is presented in this work with the view to better understand the electrodeposition of copper from non-cyanide alkaline solution containing glycine. The parameters studied were glycine concentration, temperature and scanning rate. The voltametric studies...

Cyclic voltammetry, differential capacity, and chronocoulometry were employed in a quantitative study of polyethylene glycol,(Mw 20000) (PEG20000) adsorption onto a polycrystalline Au substrate. The surface tension, film pressure, relative Gibbs surface excess, and the Gibbs energy of adsorption were determined as a function of the electrode potent...

The influence of Polyethylene Glycol 200 (PEG(200)) or a PEG(200)/benzylideneacetone (BDA) mixture on the mechanism of Zn deposition and nucleation kinetics was studied by voltammetry, chronoamperometry and atomic force microscopy (AFM). The addition of PEG(200) or PEG(200)/BDA to the solution partially inhibited the reduction of Zn(II) at E = -1.1...

In this work, the simultaneous electrodeposition of nickel with zinc was studied in order to determine the influence of the composition of the deposition solution on the properties of the obtained electrodeposits. It was founded that the Ni/Zn concentrations ratio in solution determines the deposition mechanism and thus, the chemical composition an...