Wojciech Macyk

Wojciech Macyk
Jagiellonian University | UJ · Faculty of Chemistry

Prof. Dr. habil.

About

163
Publications
33,465
Reads
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6,818
Citations
Additional affiliations
October 2016 - present
Jagiellonian University
Position
  • Professor (Full)
December 2011 - September 2016
Jagiellonian University
Position
  • Professor
January 2003 - November 2011
Jagiellonian University
Position
  • Researcher

Publications

Publications (163)
Article
Fenton oxidation with heterogeneous hematite catalyst in a fixed bed reactor was investigated for water disinfection. The granulated hematite catalyst was prepared and tested to decompose H2O2, inactivate bacteria E. coli and degrade oxytetracycline. X-ray diffraction patterns confirmed the stability of the catalyst phase after sintering and after...
Article
Full-text available
Photocatalysis is considered a promising technology to alleviate the pressure of environmental pollution and energy shortage. Among various photocatalysts, cadmium chalcogenide quantum dots (CdX QDs) stand out due to their excellent visible light absorption ability and efficient charge separation properties. This review presents the atomic and elec...
Article
Understanding of the TiO2-assisted phototransformations observed for fundamentally important derivatives of Rhodamine B is expected to bring consistent and eventually comprehensive knowledge on behavior of this dye. The photocatalytic transformations of Rhodamine B in solution irradiated with visible light embrace an N-deethylation process eventual...
Article
Developing a high‐performance photocatalyst is important for realizing efficient photocatalytic H2O2 generation. Herein, a novel step‐scheme (S‐scheme) heterojunction photocatalyst C3N4/PDA (CNP) comprised of ultrathin g‐C3N4 (U‐CN) and polydopamine (PDA) is constructed by in situ self‐polymerization. The optimal photocatalyst presents an excellent...
Article
Electrocatalytic hydrogen evolution reaction (HER) in acidic solution using Co-based oxides is extremely difficult due to their instability. Herein, we report a hollow carbon sphere-supported Pt/CoOx (Pt/CoOx-HCS) electrocatalyst for active HER in 0.5 M H2SO4 solution. Microstructural and electrochemical evaluations confirm the dissolution of major...
Article
Full-text available
Metal oxide-organic hybrid semiconductors exhibit specific properties depending not only on their composition but also on the synthesis procedure, and particularly on the functionalization method, determining the interaction between the two components. Surface adsorption is the most common way to prepare organic-modified metal oxides. Here a simple...
Article
Full-text available
In this paper, we describe the role of anatase and rutile crystal phases on diphenyl sulphide (Ph2S) catalytic and photocatalytic oxidation. The highly selective and efficient synthesis of diphenyl sulfoxide (Ph2SO) and diphenyl sulfone (Ph2SO2) at titanium dioxide was demonstrated. Ph2S oxidation in the presence of hydrogen peroxide at anatase-TiO...
Article
Graphdiyne is an emerging material widely used in photocatalysis. Its excellent physicochemical properties, such as nonuniform electron distribution, uniform pore distribution, excellent electron mobility, and high chemical stability, make it promising for solar fuel production. Given the rapid development of graphdiyne-based photocatalysts and the...
Article
Polluted air containing particulate matter (PM) is a huge environmental problem in the city of Kraków, Poland. PM causes numerous negative health effects including infection of the respiration system and cardiovascular disorders. The development of autoimmune disorders can be facilitated by redox active transition metals due to the generation of re...
Article
The study proposes two new TiO2 photocatalysts with excellent photocatalytic properties obtained by the reverse micelle (RM-TiO2) and low temperature (LT-TiO2) methods. The crystal structure and morphology of the obtained TiO2 samples were analyzed by X-ray diffraction, scanning electron microscopy and IR-spectroscopy. The chosen synthesis conditio...
Article
A key component of the photocatalytic fuel cell (PFC) is a photoanode, typically based on highly stable semiconductor (e.g., TiO2) that is capable of effective photoelectrocatalytic oxidation of fuels. Notably, the photo(electro)catalytic activity of TiO2 materials can depend heavily on the microstructural morphology, so that tailored crystals with...
Article
Full-text available
Solubility of transition metal compounds plays a significant role in adverse health effects because that is one of the most important factors of particulate matter bioavailability in the body. In this study, we focus on the chemical analysis of particulate matter (PM) collected at different locations in the area of Kraków, one of the most polluted...
Article
The diffuse reflectance spectroelectrochemistry (SE-DRS) and reversed double-beam photoacoustic spectroscopy (RDB-PAS) provide unique, complementary information on the density of electronic states (DOS) in the vicinity of the conduction band bottom. The measurements are performed under quite different conditions, representing the solid/liquid and s...
Article
We developed low-temperature (up to 200 °C) synthesis of TiO2 nanocomposites, which allows precise tuning of the anatase/rutile ratio. The materials were synthesized hydrothermally from strongly acidic solutions of Ti(III) precursors and hydrogen peroxide. Two series of materials (A and B series) have been synthesized; the A series is characterized...
Chapter
Thermodynamics and kinetics of primary photophysical and photochemical processes govern the overall photoactivity of photocatalytic and photoelectrocatalytic systems. A proper determination of redox potentials, Fermi levels, quasi-Fermi levels, distribution of electronic states and surface traps, as well as lifetimes of photogenerated charge carrie...
Article
We have synthesized and characterized a series of TiO2(B)/anatase photocatalysts in the form of nano-belts. Spectroelectrochemical measurements (SE-DRS) revealed the staggered-type of the band alignment for anatase and TiO2(B) composites, with higher potentials of band edges for anatase. The photoactivity of the materials and photocurrent generatio...
Article
A visible light responsive heterojunction system composed of Fe2O3 nanorods (NF), reduced graphene oxide (rGO) and double oxide perovskites (LaSrFe2–nConO6, n = 1 (LSFC) and 0 (LSFF)) was rationally designed for an effective photoelectrochemical water splitting. The photoelectrodes were characterized in terms of structure, surface, physicochemical...
Article
Full-text available
Titanosilicate ferrierite zeolite (FER) and its delaminated form (ITQ-6), with various Si/Ti molar ratios, were synthetized and tested as catalysts for diphenyl sulfide (Ph2S) and dimethyl sulfide (DMS) oxidation with H2O2. The zeolites were characterized with respect to their chemical composition (ICP-OES), structure (XRD, UV–vis DRS) and texture...
Article
Herein, two-dimensional (2D) TiO2 mesoporous nanosheets with three to four C3N4 layers grown in situ are employed to design a core–shell 2D/2D van der Waals heterojunction (TiO2/C3N4). Edge-terminated zero-dimensional (0D) Ti3C2 MXene quantum dots (TCQD) are subsequently integrated in the C3N4 surface via electrostatic interactions. The constructed...
Article
Full-text available
Hydrogen production by photocatalytic water splitting is one of the most promising sustainable routes to store solar energy in the form of chemical bonds. To obtain significant H2 evolution rates (HERs) a variety of defective TiO2 catalysts were synthesized by means of procedures generally requiring highly energy-consuming treatments, e.g. hydrogen...
Article
Full-text available
The core-shell NaYb0.99F4:Tm0.01@NaYF4 upconverting particles (UCPs) with a high UV emission to apply in NIR-driven photocatalysis were synthesized. The influence of the Yb3+ doping concentration in NaYxF4:Yb0.99−xTm0.01 core particles, and the role of the NaYF4 shell on the upconversion emission intensity of the UCPs were studied. The absorption o...
Article
Full-text available
Samples of TiO2 (P25) doped with zinc, tin, and vanadium, thermally treated at 550 °C for 6 h, were tested as catalysts and photocatalysts for the oxidation of diphenyl sulphide to diphenyl sulfoxide and sulfone, using hydrogen peroxide as an oxidation agent. Thermal treatment of pure TiO2 and its vanadium-doped forms resulted in a decrease of anat...
Article
Full-text available
Interaction of amorphous and crystalline TiO2 ultrafine particles (2–6 nm) with rutin results in the formation of colored nanomaterials of an excellent dispersity and enhanced colloidal stability in aqueous media. The FTIR and Raman spectra confirmed attachment of the rutin ligand via vicinal hydroxyl groups in a catechol-like fashion. The binding...
Article
Synthetic procedures, including doping, sintering and surface coating, can noticeably affect the physicochemical properties of semiconductors. Introduced changes very often translate into photocatalytic and photoelectrochemical activity alterations. However, in this work we have focused on more subtle treatments, which result in lack of changes obs...
Conference Paper
Full-text available
In the energy storage context, metal ion batteries such as Li, Na, and K are governing the market. However, their activity significantly relied on anode materials. Mostly, the charging of these batteries occurs by produced electricity from environmentally hazardous processes [1]. In a totally different approach, light can be utilized to accelerate...
Article
DFT/D+U and density functional based tight binding (DFTB) molecular modeling was used to investigate the role of the structural, electronic and optical properties of reduced graphene oxide surface (r-GO), hybridized with hydrated TiO<sub>2</sub> moieties of various size, ranging from small molecular Ti<sub>2</sub>O<sub>4</sub> clusters into extende...
Article
The goal of the work is to verify which properties of TiO2-based materials, influenced by small amounts of Fe, Co, Ga, Bi, W, Mo, V and Ni species used as modifiers, play the predominant role in changing the photoactivity of TiO2. Two groups of materials were studied: TiO2 synthesized in the presence of nanocrystalline metal oxide and dissolved met...
Article
Photocatalytic coatings at polymers, showing a visible light induced photoactivity, can be synthesized using a low temperature oxygen plasma treatment of the polymer (PP) followed by deposition of TiO2 nanoparticles and their sensitization with organic ligands. The whole process consists of three major steps: surface activation involving its partia...
Article
Tai­lored crys­tals of anatase TiO2 have been syn­the­sized us­ing a hy­drother­mal method with hy­dro­flu­o­ric acid and sodium flu­o­ride as cap­ping agents. Ti­ta­nium diox­ide in the form of sheets, tetrag­o­nal trun­cated bipyra­mids, cuboids and belts of­fer dif­fer­ent ex­posed facets: {001}, {001}/ { 101}, {001}/ { 100} and {100}, re­spec­t...
Article
The nanostructured Zn-doped cobalt ferrites (Co1-xZnxFe2O4, where x ranges from 0.0 to 1.0 with the step of 0.1) were studied in order to elucidate the relation between their cationic distribution within the spinel sublattices and catalytic properties. The thermal transformation of the precursors (metal hydroxides) obtained through hydroxide co-pre...
Article
BiFeO3 (BF) and LaFeO3 (LF) perovskites were synthesized using a microwave-assisted (MW) and sol-gel (SG) methods. XRD, XPS, TEM, UV-DRS techniques were applied to study physicochemical properties of perovskites. In addition, Incident Photon-to-Current Efficiency (IPCE) measurements, Linear Sweep Voltammetry (LSV) and impedance spectroscopy were us...
Article
For the first time, photosensitization of selected alkaline titanates with surface charge transfer complexes has been proven. Activation of BaTiO3, SrTiO3 and CaTiO3 to visible as well as ultraviolet light has been achieved by impregnation with catechol, salicylic acid and 2,3-naphthalenediol. Simple modification of titanates with organic compounds...
Article
Full-text available
In order to solve the shortage of sustainable energy and the related concern about combustion of fossil fuels, converting the most abundant solar energy into chemical fuels becomes one of the most promising choices to provide the everlasting and environmentally friendly energy vector along with the minimum impact to environment. Among the methods o...
Article
Full-text available
The intriguing properties of triiodide organic salts ([(C6H5)3AsO]2H+I3‐, (C6H5CH2)3NH+I3‐ ·C6H5CH3, and [(C6H5CH2)3NO]2H+I3‐) have been analyzed in detail using experimental and theoretical techniques. The analysis of crystal structures, density of states distributions and photocurrent generation of this purely ionic materials indicates insulating...
Article
Evaluation of photocatalytic activity towards oxidative degradation of organic pollutants is of crucial importance in heterogeneous photocatalysis. In this study, we address the problem of using a visible-light absorbing dye, methylene blue, as a model pollutant in photocatalytic investigations based on experiments using visible light-responsive In...
Chapter
Although production of solar fuels from water or carbon dioxide seems still too expensive to compete with fossil fuels, application of photocatalysis for synthesis of valuable organic chemicals may appear an interesting approach. The use of a photocatalyst and light as the energy source can be considered as a green, sustainable alternative for othe...
Article
The information on the electronic structure of nano- and microstructured semiconductors is crucial for their applications in photovoltaics, optoelectronics and photocatalysis. The distribution of intra-bandgap electronic states is one of the most relevant parameters which may be tuned in order to provide desired properties of a photoactive material...
Article
The aim of this study is to investigate in-depth the effect of Co²⁺ ions doping on ZnFe2O4 nanoparticles in term of morphology, magnetic and optical properties. Zn1-xCoxFe2O4 (x=0.0, 0.1, 0.2, 0.3, 0.4, 0.5) powders were prepared by co-precipitation method. X-ray diffraction (XRD) and Energy Dispersive Spectroscopy (EDS) confirmed the incorporation...
Article
Background: The main goal of periodontal therapy is to eliminate the infection spreading in periodontium. Antimicrobial photodynamic therapy may be applied in order to eradicate pathogens remaining in periodontal tissues after conventional mechanical debridement, thus, improve the treatment results. The aim of this in vitro study was to evaluate t...
Article
Submicron particulate matter containing particles with an aerodynamic diameter ≤1 μm (PM1) are not monitored continuously by Environmental Protection Agencies around the World and are seldom studied. Numerous studies have indicated that people exposed to ultrafine (≤100 nm), submicron and fine particulate matter containing particles with an aerodyn...
Article
Popped graphene oxide (PGO), either bare or loaded with CuO (or Cu2O), has been characterized for its photoelectrochemical properties and used for the first time as photocatalyst for CO2 insertion into CH bonds, a challenging reaction of great industrial interest. PGO joins, thus, the restricted number of modified polymeric C-species (fullerenes an...
Article
The recent climate change agreement in Paris highlights the imperative to aggressively decarbonize the energy economy and develop new technologies, especially for the generation of electrical energy that are environmentally clean. This challenge can only be addressed by a multi-pronged approach to research and education of the next generation of sc...
Article
Bare and photosensitized copper iodide were tested in photocatalysed degradation of an organic dye (Acid Red 1) and inactivation of fungi (Saccharomyces cerevisiae). CuI, with the band gap energy slightly lower than that of TiO2, appeared highly efficient in these processes. Sensitization of copper iodide was achieved by surface modification with [...
Article
Full-text available
The effect of Zn-doping in CoFe2O4 nanoparticles (NPs) through chemical co-precipitation route was investigated in term of structural, optical, and magnetic properties. Both XRD and FTIR analyses confirm the formation of cubic spinel phase, where the crystallite size changes with Zn content from 46 to 77 nm. The Scherrer method, Williamson-Hall (W-...
Article
The Inside cover picture shows the concept of using p-type semiconductors as photocatalysts for carbon dioxide conversion into chemicals and fuels. Although p- and n-type semiconductors are mainly considered as basic components used in electronics, the distinction between these two types of semiconductors may also be crucial for photocatalysis. The...
Article
A p-type semiconductor, CuI, has been synthesized, characterized, and tested as a photocatalyst for CO2 reduction under UV/Vis irradiation in presence of isopropanol as a hole scavenger. Formation of CO, CH4 , and/or HCOOH was observed. The photocatalytic activity of CuI was attributed to the very low potential of the conduction band edge (i.e., -2...
Article
Full-text available
Coordination compounds with a tin center surrounded by both organic and inorganic ligands ([SnI4{(C6H5)3PO}2], [SnI4{(C6H5)2SO}2], and [SnI4(C5H5NO)2]) acting as molecular semiconductors are in the spotlight of this article. This is a new class of hybrid semiconducting materials where optoelectronic properties of inorganic core (SnI4) were tuned by...
Article
Anatase-brookite TiO2 photocatalysts were prepared by the sol-gel process controlled within reverse micelles and processing by pressurized hot solvents − water/methanol/water (TiO2(M)) and water/ethanol/water (TiO2(E)), as an unconventional alternative to common calcination. The main goal of this work was to prepare anatase-brookite mixtures by pro...
Article
Applications of metalloporphyrins and related molecules have been extensively pursued in the context of photodynamic therapy of cancer (PDT) and other biomedical applications. This review discusses photophysical and photochemical properties of metalloporphyrins and their analogues, such as metallochlorins, metallobacteriochlorins and metallophthalo...
Article
This article focuses on the versatile ways in which hydrogen peroxide can be activated by metal ions and metal compounds, in terms of possible biomedical and environmental applications and future incentives in these areas. Mechanistic studies performed in our group are discussed in reference to related studies reported in the literature. It covers...
Article
Utilization of visible light by photosensitization of semiconductor photocatalysts via surface attachment of small colorless organic pollutants (COP) is an effective way to stimulate their photocatalytic degradation. Herein, by means of the spectroscopic, photoelectrochemical, spectroelectrochemical and photocatalytic studies combined with the DFT+...
Article
Titanium dioxide, TiO2, is commonly considered as an n-type semiconductor. The present work shows that TiO2 exhibits both n- and p-type semiconducting properties. It is shown that p-type properties may be imposed by either increasing of oxygen activity or incorporation of acceptor type ions, such as chromium. This work reports the n−p transition fo...
Article
It is widely recognized that air pollutions play a fundamental role in the pathogenesis of the majority of civilization diseases. Preliminary experimental and epidemiological studies point at the important role of transition metals – common contaminants of environmental pollution – in the initiation and progression of various autoimmune disorders....
Article
Full-text available
Rutile form of titanium dioxide (r-TiO2) usually shows a lower photocatalytic activity when compared to anatase-TiO2 (a-TiO2). Nevertheless, there are numerous examples of sometimes unexpectedly high activity of r-TiO2. This material may appear particularly useful when a non-complete and selective photocatalytic oxidation of organic substrates is r...
Article
Industrial utilization of CO2 is an important research area not only due to the potential contribution to the reduction of emissions into atmosphere, but also for saving carbon resources through the recycle of carbon. The use of solar energy in the conversion of CO2 appears to be a major challenge and opportunity for the future. A group of nanocrys...
Article
Full-text available
Photophysical and photochemical studies on 5,10,15,20-tetrakis(2,6-difluoro-5-N-methylsulfamylophenyl) porphyrin (F 2 PMet) and its cobalt(III) and zinc(II) complexes, including spectroscopic characteristics, photostability and photocatalytic activity, were carried out. The hybrid materials resulting from adsorption of these tetrapyrroles at the su...
Article
Antimicrobial photodynamic therapy (aPDT) involves pathogens' destruction caused by means of toxic Reactive Oxygen Species (ROS) that are generated upon the interaction of a photoactivatable substance (photosensitizer), light of the appropriate wavelenght and oxygen. Among many clinical applications, it is also used as a supplementary method of tre...