Special Issue "Photocatalytic Degradation of Organic Wastes in Water"
A special issue of Catalysts (ISSN 2073-4344).
Deadline for manuscript submissions: 30 November 2020.
Interests: preparation and characterization of carbon materials and magnetic nanomaterials; heterogeneous catalysis and photocatalysis; adsorption and advanced oxidation processes for water treatment; environment
Interests: preparation of new nanostructured carbon materials as catalysts and photocatalysts to develop advanced water treatments; removal of pollutants from aqueous and gaseous phases by adsorption/bioadsorption/biodegradation processes and catalysis using advanced carbon materials; new treatments of water contaminated by organic pollutants by integrated technologies based on advanced oxidation/reduction processes (ozonation, photooxidation, radiolysis) and carbon materials
Interests: carbon materials; water treatment; advanced oxidation processes; photocatalysis; UV/solar radiation
In recent years, public concerns have arisen about environmental pollution by so-called emerging organic pollutants (EOPS) in water sources and factory effluents, because of their potentially adverse effects on human health and aquatic ecosystems. A large number of physical and biological processes have been proposed to remove pollutants from water, but they do not completely remove the majority of EOPs. Advanced oxidation processes (AOPs) based on catalytic, electrochemical, and photochemical reactions are currently available and are able to degrade a large number of pollutants. An important group of AOPs is represented by photocatalytic processes, in which luminous radiation produces the electronic activation of the semiconductor material that constitutes the catalyst. TiO2 is one of the most widely applied materials as photocatalysts in water decontamination, both alone and in combination with other materials acting as doping agents and/or material supports. However, the use of this semiconductor material presents known disadvantages; therefore, it is very important to continue working on the search for new, more efficient photocatalysts with better performance.
This Special Issue on “Photocatalytic Degradation of Organic Wastes in Water” is intended to cover the progresses and new trends in the preparation and characterization of photocatalytic materials, with particular emphasis on their applications in environmental remediation for the removal of emerging organic pollutans from different types of water.
Prof. Dr. José Rivera-Utrilla
Prof. María V. López-Ramón
Prof. Dr. Manuel Sánchez-Polo
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- Photocatalysts design and synthesis
- UV/visible light
- solar light
- organic pollutants
- reaction kinetics and mechanism
- stability and reusability
- degradation by-products
- environmental applications
- water treatments
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Hydrothermal synthesis of GO/TiO2 composites with high performance as UV photocatalysts for degradation of parabens
Authors: M. Ruidíaz-Martínez, M. A. Álvarez-Merino, M.V. López-Ramón, G. Cruz-Quesada, J. Rivera-Utrilla, M. Sánchez-Polo.
Title: The Effect of Electrolytes on the Degradation Kinetics of Caffeine in water by UV/H2O2
Authors: Pedro M. Rendel1,* and Giora Rytwo1
Title: On the synthesis of BiOBr and ZnS/BiOBr nanomaterials for the visible-light driven photocatalytic degradation of ibuprofen in tap water.
Authors: Juan C. Durán-Álvarez; Iván Carranza; Carolina Martínez-Avelar; Mario Rodríguez-Varela; Rodolfo Zanella
Affiliation: Universidad Nacional Autónoma de México
Abstract: This work aimed to synthesize BiOBr in the form of nanopowder to remove the pseudo-persistent contaminant ibuprofen. Precipitation and solvothermal methods were tested, using Bi(NO3)3 and KBr as precursors. Nanoplatelets were obtained using the former method, while microspheres were produced using the hydrothermal path. The photocatalytic potential of the synthesized materials was measured through batch tests, using 250 mL of a 30 ppm ibuprofen solution under visible light irradiation. The highest degradation and mineralization yields were obtained using the BiOBr microspheres. This material was then decorated with ZnS microspheres via the hydrothermal route. In pure water, the ZnS/BiOBr heterostructure was able to completely degrade ibuprofen upon 90 min of irradiation, while mineralization was near 70%. Then, when environmentally relevant conditions (tap water and 50 ppb of ibuprofen) were used, similar degradation and mineralization rates were obtained. The outstanding photocatalytic performance was related to the transfer of the charge carriers from the BiOBr to the ZnS microspheres. Degradation by-products were identified by LC-MS/MS, and a degradation path was proposed.
Title: Photodegradation of pyridine by means of a rotary photodisk reactor (RFDR) using zinc oxide (znO) doped with nano aluminum particles using natural light
Authors: Carlos montalvo
Affiliation: University of city carmen
Title: Biosynthesis of ZnO/SnO2 on Methylene Blue degradation: Effect of various loadings
Authors: LM Mahlaule-Glory; NC Hintsho-Mbita*
Affiliation: University of Limpopo
Title: The Effect of Electrolytes on the Degradation Kinetics of Caffeine in water by UV/H2O2
Authors: Pedro M. Rendel1,* and Giora Rytwo1,2
Affiliation: 1 Environmental Physical Chemistry Laboratory, MIGAL, Galilee Research Institute, Kiryat Shmona, Israel. 2 Department of Environmental Sciences, Tel Hai College, Upper Galilee, Israel
Abstract: Considered the world's most widely consumed psychoactive drug, caffeine became a widespread environmental pollutant, contaminating both the hydrosphere as well as the pedosphere, by thus leading to an unclear effect on the surrounding biosphere. Unsuccessfully treated by regular wastewater-treatment plants, caffeine concentrations in discharged effluents and natural reservoirs are constantly rising. Photodegradation is recently drawing much attention due to its potential to oxidize such contaminating compounds. In continuation to our previous work on the photodegradation kinetics of caffeine in water by UV/H2O2 and UV/TiO2, this work, evaluates the degredation kinetics in the presence of different electrolytes, including NaCl, KCl, MgCl, NaBr, and KBr, thus is order to evaluate the method efficiency in waters in more complex water systems. Results show that the degradation kinetics follows a pseudo-first-order, and affected differently by the presence of the different ions, mostly resulting in slower degradation rates. Empirical rate laws describing the degradation kinetics of caffeine in the presence of the different electrolytes are presented.
Title: Synthesis of Magnetic Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 Nanoparticles: The Photocatalytic Effects on Organic Pollutants under UV-Vis Light Irradiation
Authors: Marta E. Plonska-Brzezinska
Affiliation: Medical University of Bialystok, Faculty of Pharmacy with the Division of Laboratory Medicine
Abstract: The magnetic Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 nanoparticles with different molar ratios of CeVO4 were synthesized via co-precipitation with sonochemical-assisted method. X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier transformation infrared spectroscopy, ultraviolet-visible diffuse reflection spectroscopy, vibrating sample magnetometer and scanning electron microscopy (SEM) methods were used for the physico-chemical characterization of the obtained nanoparticles. The SEM images showed that the average size of Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 aggregates are about 50–70 nm and 80-100 nm, respectively. The photocatalytic performance of these nanoparticles was examined by methylene blue degradation under visible light (assisted by H2O2). The sample with the mass ratio 1:2:1 (Fe3O4/ZnWO4/CeVO4) showed the optimal photocatalytic performances, thus subsequently, this sample was used for photodegradation of different organic pollutants under UV and visible light irradiation. Almost 100% degradation by visible light irradiation and by exposure to UV light is observed for methyl violet and methyl orange, respectively. Additionally, the mechanism of photocatalytic reaction was investigated by releasing ˙OH under UV light in a system including terephthalic acid, as well as by ˙O2−, ˙OH, and holes scavengers.
Title: Solar Degradation of the Sulfamethazine Drug Assisted by rGO/Bi Composite Photocatalysts
Authors: María Victoria López Ramón
Affiliation: Faculty of Experimental Science, Dept. of Inorganic & Organic Chemistry, University of Jaen, Jaen 23071, Spain