Julien Vieillard

Université de Rouen Normandie | UR · Organic Chemistry research Institute

In this study, adsorption of two cationic dyes, Toluidine Blue (TB) and Methyl violet 2B (MV 2B) from an aqueous solution was achieved by using multifunctional composite material. The formulation of the composite (MO@HA) was obtained by using Moringa oleifera seed hull powder, calcium chloride (CaCl2), and ammonium hydrogenophosphate (NH4)2HPO4 sal...

This work developed a novel sustainable adsorbent (PF-Aq) prepared by the amino-functionalization of palm oil fibers (PF). XPS, SEM/EDS, TGA/DSC, and FT-IR techniques proved the successful functionalization of the PF with the amino group. The PF-Aq adsorbent presents a high adsorption capacity for phosphate and Cr(VI) ions. Adsorption kinetics of t...

Significant anthropogenic activities have contributed to water pollution with harmful contaminants such as Polycyclic Aromatic Hydrocarbons (PAHs) and heavy metals. This study focuses on the use of a co-product from the flax fiber industry (i.e. activated carbon coming from flax shives after pyrolysis) as bio-adsorbent. First, for the modelling ste...

AC-PEI(H) was prepared by chemically grafting polyethyleneimine (PEI) onto activated carbon (AC), followed by acidification and protonation of the amino groups, resulting in positively charged ammonium moieties. The resulting materials are used for the adsorption of phosphate ions (H2PO4−) from water. The effects of temperature, contact time, and c...

Landfill leachate poses a significant environmental threat due to its complex and varied pollutants. The need for efficient processes in treating and detoxifying landfill leachate remains crucial. This study focuses on the preparation of two types of ceramic membranes (CM) as novel methods for landfill leachate treatment. The first ceramic membrane...

The present work investigates the potential use of sodium silicate generated from rice husk ash and functionalized with cetyltrimethylammonium bromide (CTAB), for adsorption of Congo Red (CR) and Naphthol Green B (NGB) from aqueous solutions. The adsorption capacity of raw rice husk, calcinated rice husk (673, 873, 1073, and 1273 K), and functional...

In this study, we discuss the removal of fluoride from water through column adsorption methods using Al(OH)3@AC as a functional granular activated carbon. The height of the bed, fluoride concentration, and flow rate are the experimental factors used to obtain the breakthrough curves. As the flow rate increased, the breakthrough and saturation times...

This study searched for the best synthesis route for producing an adsorbent from the alkaline fusion of volcanic rock powder waste. The samples synthesized under different conditions of temperature and alkalizing ratio/precursor material, nine in total (NP.F, NP.F1, NP.F2, ...NP.F8 ), were used in the adsorption of acid green 16 (AG 16) and acid re...

This study addresses the application and evaluation of diatomite as a low-cost, natural, abundant, and highly efficient adsorbent of Nd3+, Ce3+, and La3+ rare earth elements (REEs). The results revealed that the diatomite was porous and cylindrical, with a specific surface area of 150 m2 g−1. The diatomite displayed a point of zero charge equal to...

Cocoa shell was modified whit sodium hydroxide (NaOH) and cationic surfactant cetyltrimethylammonium bromide (CTAB) to increase surface functionality, surface area, and positive charge density. The prepared adsorbent CC-OH-CTAB was used to remove indigo carmine (IC) and bromocresol green (BCG) dyes from water. The optimal pH for IC and BCG adsorpti...

In the present research, the removal of pharmaceutical contaminants based on atenolol (AT) and propranolol (PR) using modified activated carbon (AC) in a liquid solution was studied. Two methods, adsorption and photodegradation, were used to eliminate AT and PR. First, AC was prepared from date stems and then modified via hydroxylation (AC-OH) and...

In this study, we aimed to produce a sustainable and efficient powdered activated carbon (SP-AC) and evaluate its adsorptive abilities to uptake and recover rare earth elements (REEs) from synthetic solutions containing lanthanum (La(III)) and cerium (Ce(III)), and real leachate, from phosphogypsum, containing several REEs. The adsorbent material w...

The evolution of low-cost ecotechnologies in water treatment and purification is highly increased. Face to the growing global demand for eco-friendly water treatment materials, the non-valorized herb-based biomass covering a large area could be a promising alternative. Herbs (HB) are currently one of the cheapest biomasses. Therefore, the utilizati...

Removal of dyes using optimized and renewable adsorbent with high adsorption capacity remain a challenge. Rice husk was used as a raw material for the manufacture of a new CTAB-functionalized sodium silicate adsorbent. The adsorption capacity of raw rice husk, calcined rice husk (400, 600, 800, and 1000°C), and functionalized sodium silicate with C...

This study aimed to synthesize a green powdered layered double hydroxide (LDH) based on nickel-aluminum (Ni–Al-LDH) to evaluate its efficiency in the removal of rare earth elements (REEs), Praseodymium (Pr3+) and Samarium (Sm3+), from synthetic effluents and real leachate using phosphogypsum as a secondary source of REEs. Several characterization t...

tudied to adsorb and recover the rare earth element cerium (Ce(III)) from an aqueous solution. The results revealed that the hydrochar contains several surface functional groups (e.g., C–O, C=O, OH, COOH), which largely influenced its adsorption capacity. The effect of pH strongly influenced the Ce(III) removal, achieving its maximum removal effici...

A lack of dimensional stability of worsted fabrics when laundering leads to a rapid increase in wool textile waste. Dry cleaning is thus highly recommended; however, it requires solvent(s), which are not eco-friendly. The aim of this study was to produce a machine-washable, 100% worsted wool woven as an outer fabric for men’s suit jacket that is al...

This article investigated the recovery of Gd3+ from real leachate of phosphogypsum (PG) using natural bentonite clay. The characterization results indicate classical bentonite characteristics, such as rugosity and an SBET 91.3 m² g-1, with meso (Dp=3.82 nm) and macroporous (Dp=52.6 nm). In addition, it was identified that the major functional group...

This study aims to develop a new refreshing feeling, ecological, and antimicrobial fabrics for medicinal applications. The geranium essential oils (GEO) are incorporated into polyester and cotton fabrics by different methods, such as ultrasound, diffusion, and padding. The effect of solvent, nature of fibers, and treatment processes were evaluated...

In this work, an electrolyte-gated graphene field-effect transistor is developed for Gd3+ ion detection in water. The source and drain electrodes of the transistor are fabricated by photolithography on polyimide, while the graphene channel is obtained by inkjet-printing a graphene oxide ink subsequently electro-reduced to give reduced graphene oxid...

Citation: Nascimento, V.X.; Schnorr, C.; Lütke, S.F.; Da Silva, M.C.F.; Machado Machado, F.; Thue, P.S.; Lima, É.C.; Vieillard, J.; Silva, L.F.O.; Dotto, G.L. Adsorptive Features of Magnetic Activated Carbons Prepared by a One-Step Process towards Brilliant Blue Dye. Molecules 2023, 28, 1821. https://doi. Abstract: Water pollution by dyes has been...

Adsorption is a promising technology for removing several contaminants from aqueous matrices. In the last years, researchers worldwide have been working on developing composite adsorbents to overcome some limitations and drawbacks of conventional adsorbent materials, which depend on various factors, including the characteristics of the adsorbents....

Activated carbons named AC105 and AC11 were prepared from Brazil nut shells using the weight ratios of Brazil nut shells: KOH of 1:0.5 and 1:1, respectively. The prepared materials were characterized using different techniques and applied to remove phenol from the aqueous solution through adsorption. The characterization data showed that both mater...

Atrazine and diuron are two pesticide compounds with very low surface interaction capacity, whose adsorption efficiency remains a challenge in environmental remediation applications. In this work, statistical physics (sta-phy) modelling and density functional theory (DFT) calculations have explored several still unveiled mechanisms involved. A mode...

The surface engineering of polymers is still in development in order to modulate their properties to meet the requirements of the targeted applications. Lignocellulosic and agro-waste materials are increasingly studied as alternative to conventional ones employed for pollution remediation but also to develop original composites. In both cases, the...

The surface engineering of polymers is still in development in order to modulate their properties to meet the requirements of the targeted applications. Lignocellulosic and agro-waste materials are increasingly studied as alternative to conventional ones employed for pollution remediation but also to develop original composites. In both cases, the...

Adsorption on agrowaste is one of the versatile techniques employed for removal of toxic species from aqueous solutions. The emphasis of this work was to prepared a low-cost and highly efficient palm oil fiber biosorbent by amine cross-linking (PF-Aq) and tested for its ability to remove phosphate and chromate ions from aqueous solutions.

Pseudomonas aeruginosa is a Gram-negative bacterium which can cause serious infections among immune-depressed people including cystic fibrosis patients where it can colonize the lungs causing chronic infections. Iron is essential for P. aeruginosa and can be provided via three sources under aerobic conditions: its own siderophores pyochelin (PCH) a...

In the last decade, adsorption has exhibited promising and effective outcomes as a treatment technique for wastewater contaminated with many types of pollutants such as heavy metals, dyes, pharmaceuticals, and bacteria. To achieve such effectiveness, a number of potential adsorbents have been synthesized and applied for water remediation and antimi...

Pseudomonas aeruginosa biofilms cause chronic, antibiotic tolerant infections in wounds and lungs. Numerous recent studies demonstrate that bacteria can detect human communication compounds through specific sensor/receptor tools that modulate bacterial physiology. Consequently, interfering with these mechanisms offers an exciting opportunity to dir...

Developing green and functional adsorbents for the removal of inorganic pollutants from industrial wastewater is still a great challenge. Activated carbons (ACs) are promising eco-friendly materials for adsorption applications. This study reports on the preparation and functionalization of AC and its application for fluoride removal from water. Act...

This study reports on the synthesis, immobilization, and stabilization of iron (Fe) particles in activated carbon (AC) from date stem material for the heterogeneous Fenton-like removal of hazardous pollutants from water. AC-Fe was synthesized through a simple and sustainable chemical reaction using and resulting in an environmentally friendly mater...

Pesticides widely used for intensive agriculture may leach to groundwater and pose problems to drinking water and irrigation. UV-C disinfection systems (UV-DS) for water disinfection can be used also for the abatement of organic micropollutants. A pilot-scale continuous flow-through UV-DS system was evaluated for its degradation efficiency of atraz...

In this work, a sensor yarn based on a natural sisal yarn containing a non-electro-conductive core impregnated with PVA polymer and coated by PEDOT:PSS polymer as an electro-conductive sheath was investigated. The main objectives include the development of this new sensor yarn as a first step. Then, we look towards the insertion of this sensor yarn...

The effects of atmospheric air plasma treatment based on dielectric barrier discharge (DBD) technology on the surface alteration of a woven polyester (PET) textile fabric were investigated. Chemical and physical surface modifications were characterized by specific wettability measurements (water contact angle-WCA and % capillarity), scanning electr...

The effects of copper nanoparticles (CuNP) dispersion on the optical and electrical properties of mesoporous SBA-15 like silica were investigated. Full characterization of the resulting SBA-15-Cu through X-ray diffraction (XRD), thermogravimetry analysis (TGA), scanning electron microscopy (SEM), energy dispersion X-ray fluorescence (ED-XRF), diffu...

Nitrate (NO3⁻) and chromium (Cr(VI)) ions from contaminated aqueous solutions were successfully adsorbed onto functionalized cocoa shell (ECAB, an agricultural waste material) via chemical grafting of 3-aminopropyltriethoxysilane (APTES). The resulting adsorbent – ECAB-APTES-HCl – was characterized by SEM, zeta potential, calorimetry, FTIR spectros...

The synthesis of new cadiolide analogues was carried out using a one-pot multi component synthesis. The antibacterial activity of these molecules was evaluated on standard and antibiotic resistant bacterial strains chosen for their involvement in human health or in food-born poisoning. Four molecules have shown good activities with MICs of 2 μg/mL-...

In this study, we investigated the ionothermal carbonization (ITC) in 1-butyl-3-methylimidazolium tetrachloroferrate, [Bmim][FeCl4], of cocoa bean shells, a raw lignocellulosic agrowaste. The beneficial inputs of this ITC approach towards mass yield, carbon yield and specific surface area of the solid chars (namely, ionochars) were clearly evidence...

The present research work focused on the activated carbon (AC) preparation from dates waste followed by its surface modification by incipient wetness impregnation using different metals: Ca, Co, Mg and Al. The obtained results showed that the AC-Al presented the best removal efficiency of the fluoride. The prepared activated carbons (AC) and (AC-Al...

The present work addresses the development of simple, low-cost and eco-friendly cocoa-shell-based materials for efficient removal of heavy metal hexavalent chromium (Cr(VI)), and toxic nitrate (NO3⁻) from aqueous solution. A conventional treatment process was used to purify cocoa shell (CS) into an adsorbent, followed by chemical grafting of dendri...

In this study, a flexible multifunctional fibrous membrane for heterogeneous Fenton-like removal of organic and pathogenic contaminants from wastewater was developed by immobilizing zerovalent iron nanoparticles (Fe-NPs) on an amine/thiol grafted polyester membrane. Full characterization of the resulting polyester membranes allowed validation of su...

The aim of this work was to prepare a composite material based on cocoa cortex and sodium alginate and test it to remove Cu(II) ions in aqueous solution in batch conditions. The composite was characterized using elemental analysis, scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA/DT...

The mass transport mechanism of the In(III) adsorption on chitin and chitosan was elucidated in this research. The chitosan and chitin presented specific surface area values of 3.60 and 4.30 m² g⁻¹, with average pore radius of 14.30 and 33.10 Ǻ, respectively. It was identified in chitosan and chitin, typical groups, such as NH and CO. It was found...

Polyester (PET) was pre-activated by atmospheric air plasma and coated by various inorganic oxide nanoparticles (MOx) such as titanium dioxide (TiO2), zinc oxide (ZnO), and silicon oxide (SiO2), using poly(vinylidene fluoride) (PVDF) and chitosan (CT) as binders. The resulting PET-PVDF-MOx-CT composites were thermally compressed and then characteri...

Vertisols occupy approximately 1,200,000 ha in Northern Cameroon. Their richness in smectites allows for the production of “bleaching earths” necessary for refining palm oil, and their effluent is used for leachate treatment. In the present work, two mineral acids (HCl and H2SO4) were compared, and the most efficient acid with the lowest cost was d...

This work reports the design and functionalization of new composite-based Polyethylene terephthalate (PET) fibers with high anti UV radiation. Polyethylene terephthalate fibrous nonwovens were coated by oxide materials (OM) like titanium dioxide (TiO2), zinc oxide (ZnO) and silicon dioxide (SiO2). Chitosan (CT) and polyvinylidene fluoride (PVDF) po...

Polyester (PET) was pre-activated by atmospheric air plasma and coated by various material oxide (MOx) such as titanium dioxide (TiO2), zinc oxide (ZnO) and silicon oxide (SiO2), using polyvinylidene fluoride (PVDF) and chitosan (CT) as binders. The resulting PET-PVDF-MOx-CT composites were thermally compressed and then characterized through scanni...

Adsorption on agrowaste is one of the versatile techniques employed for removal of toxic species (nitrate and chromate) from aqueous solutions. Cocoa cortex (ECAB) was functionalized with polyethyleneimine (PEI) and then post-activated with acidic to obtain a new low cost material (ECAB-PEI-HCl).

The excessive use of fertilizers in crops, livestock, sewage waste and septic tanks are known to cause nitrate contamination, and industrial activities including leather tanning, stainless-steel production, electroplating and wood preservatives account for the majority of chromium released to environment. Hence, it is imperative to provide low-cost...

The grafting of 5-iodoisatin heterocycle on a cyclic olefin copolymer (COC) and a gold surface was performed using a heterogeneous phase Sonogashira reaction consisting of coupling 5-iodoisatin with an arylalkyne previously introduced onto the surfaces. This optimized strategy takes advantage of the well-established methodology to functionalize COC...

The aim of the present study is to develop an eco-friendly and cost effective method for the synthesis and functionalization of copper oxide (CuO) nanosheets by chemical grafting of 3-(chloropropyl)triethoxysilane (ClPTES), p-aminothiophenol (ATP) and diethanolamine (DEA). Full characterization of the resulting materials through FTIR, X-ray diffrac...

In this work, polyester fiber (PET) were functionalized by oxides (Ox) like titanium dioxide (TiO2), zinc oxide (ZnO) and silicon dioxide (SiO2), using polyvinylidene fluoride (PVDF) as binder to obtain a PET-PVDF-Ox material. Chitosan polymer (CT) was further grafted as coating layer to improve the surface compatibility, resulting in the PET-PVDF-...

Dispersion of iron nanoparticles (Fe-NPs) was achieved on polyester fabrics (PET) before and after incorporation of dendrimers (PAMAN), 3-(aminopropyl) triethoxysilane (APTES) or thioglycerol (SH). The catalytic activity of the resulting materials (PET-Fe, PET-PAMAM-Fe, PET-APTES-Fe and PET-SH-FE) was comparatively investigated in the degradation o...

This paper presents for the first time surface functionalization of cocoa shells (CS) through the covalent grafting of 3-aminopropyltriethoxysilane (APTES) followed by the substitution of poly(dimethylsiloxane) (PDMS) and in situ generation/insertion of cobalt nanoparticles (Co-NP). The immobilization and stability of APTES–PDMS on cocoa shell were...

A general method to develop diazonium-based biochip for SPRi analysis is presented. The electrografting of carboxybenzene diazonium salt is optimized in order to fit with the requirement of the SPR technology. The influence of the surface preparation on plasmon quality is discussed and the performance of this original modified biochip is investigat...

Poly­ester/ cot­ton (PC) fab­ric was func­tion­al­ized with CuO dis­per­sion fol­lowed by di­ethanolamine (DEA) grafting. . The re­sult­ing PCCuO-DEA ma­te­r­ial was char­ac­ter­ized, and the in­frared spec­trum con­firmed the pres­ence of func­tional groups on the sur­face. Scan­ning elec­tron mi­croscopy in­di­cated that CuO in­ser­tion re­sulted...

Several iron oxides nanoparticles (Fe2O3@Fe2O3, Fe°@Fe2O3, [email protected]2O3 and calcinated Fe2O3) have been assessed as catalysts in the 1,4-addition of a cyclic β-ketoester onto methyl vinyl ketone under neat conditions. It appeared that calcinated Fe2O3NP are efficient catalysts at 1 mol% loading for the Michael addition of 1,3-dicarbonyl com...

This paper reports the synthesis and modification of novel core-shell based Hydrochar with improved affinity towards CO2. This was achieved through encapsulation within ZnO shell, followed by chemical grafting to an organic moiety bearing terminal diethanolamino groups and further dispersion of Cu0 nanoparticles. Characterization through nitrogen a...

In this study, two polyester nonwovens PET1 and PET2 were functionalized and designed via grafting of PAMAM( NH⁠2)⁠4 as dendrimers (Dr) and 3-(aminopropyl)triethoxysilane (APTES) flowed by the incorporation of copper (Cu) and silver (Ag) nanoparticles, with the aims reducing toxic molecules, dissociated particles and bacteria. The obtained nonwoven...

In this work, for the first time, a grafting of 3-aminopropyltriethoxysilane (APTES) followed by incorporation of iron nanoparticles (Fe-NPs) was used for the functionalization of graphene oxide (GO). Changes in stability, structural, morphological, thermal and catalytic properties of the resulting GO/APTES/Fe material were investigated by scanning...

A novel functional polyester fabric (PF) was successfully prepared by a facile method. PF were coated by copper oxide (CuO) followed by chemical grafting of 3-chloropropyltriethoxysilane (ClPTES) and diethanolamine (DEA). The morphology and structure of the resulting material PF@CuO–Si–N(OH)2 was characterized by X-ray diffraction, scanning electro...

A facile and eco-friendly method was developped to prepare microporous CuO@Ag0 core-shell with high catalytic and antibacterial activities. Scanning and transmission electron microscopy revealed a preponderance of nearly spherical 50 nm particles with slight structure compaction. Comparison of the hysteresis loops confimed the structure compaction...

A novel, eco-friendly and cost-effective method involving cotton fabric (CF) coating with copper oxide and grafting of 3-chloropropyltriethoxisilane and diethanolamine resulted in a multifunctional material (CF@CuO-Si-N(OH)2). The latter exhibited catalytic activity in 4-nitrophenol (4-NP) reduction, methylene blue degradation and antibacterial act...

This work was achieved to investigate the effect of both aminopropyltriethoxysilane (APTES) grafting and cobalt particles incorporation on the CO2 adsorption behavior of cocoa shell based hydrochar (HC). Electron microscopy and measurements using nitrogen adsorption-desorption isotherms showed a structure swelling after APTES grafting, followed a c...

The aim of this research is to investigate how (3-aminopropyl)triethoxysilane (APTES) grafting and cobalt nanoparticles (Co-NPs) immobilization may improve the activity of cocoa shell (CS) towards the adsorption of CO2 under ambient temperature. Pure CS are agricultural by-products which are inexpensive and abundantly available. CS powder was funct...

This article reports the synthesis and functionalization of a novel CuO@SiO2-APTES@Ag0 core-shell-shell material using a simple and low-cost process. The growth, design strategies and synthesis approach are the key factors for the development of CuO@SiO2-APTES@Ag0 as efficient material with enhanced antibacterial activity. We investigated the morph...