Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.3
3.9
Journals
Catalysts
Special Issues
Advances in Photocatalytic Wastewater Purification, 2nd Edition
share announcement

Advances in Photocatalytic Wastewater Purification, 2nd Edition

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 13937

Special Issue Editors

Dr. Hideyuki Katsumata

E-Mail Website
Guest Editor
Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan
Interests: advanced oxidation process; water purification; environmental nanotechnology; artificial photosynthesis; photocatalysts
Special Issues, Collections and Topics in MDPI journals
Dr. Huiyao Wang

E-Mail Website
Guest Editor
Department of Civil Engineering, 945 College Hernandez Hall, 3035 S Espina St., New Mexico State University, Las Cruces, NM 88003, USA
Interests: photocatalysis; water treatment; nanomaterials; advanced materials; desalination; thin films; energy materials; fuel cells; material characterizations
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Leire Ruiz-Rubio

E-Mail Website
Guest Editor
Macromolecular Chemistry Group (LQM), Department of Physical Chemistry, University of the Basque Country, 48940 Leioa, Spain
Interests: polymer science; 3D printing; hydrogels; biomaterials; composites; photopolymerization; polysaccharides; polymer blend; thermal degradation; sensors; smart agriculture
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This is the second edition of the Special Issue "Advances in Photocatalytic Wastewater Purification". Many studies have been performed on the development of sustainable water treatment technologies for improving water quality. In some countries, unavailable drinking water is a serious problem because traditional drinking water treatment systems cannot remove aquatic pathogens, toxic metal ions, and industrial waste. In addition, the treatment of wastewater containing dye contaminants is a major concern around the world. A new class of treatment processes referred to as advanced oxidation processes has been developed, particularly heterogeneous photocatalysts that utilize photon energy and convert it into chemical energy, which has been recognized as a strong candidate in this research area. The development of photocatalytic materials with high activity is required for advances in photocatalytic wastewater purification.

This Special Issue will focus on but is not limited to the following:

  • Highly efficient photocatalysts for water/wastewater purification;
  • Visible-light-driven photocatalytic process;
  • New photocatalytic mechanisms and kinetics;
  • Identification of intermediate products for photocatalytic purification process;
  • Pilot and full-scale applications.

Dr. Hideyuki Katsumata
Dr. Huiyao Wang
Dr. Leire Ruiz-Rubio
Guest Editors

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 submissions that pass pre-check are 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 2700 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.

Keywords

  • photocatalytic water
  • wastewater treatments
  • photocatalytic processes for disinfection treatments
  • synthesis, design, and characterization of photocatalysts
  • photocatalytic kinetics and mechanisms
  • visible-light-sensitive photocatalysts
  • up-scaling applications of photocatalytic process
  • real wastewater treatments

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

16 pages, 5905 KiB  
Article
Synthesis of Tungsten-Modified Sn3O4 through the Cetyltrimethylammonium Bromide-Assisted Solvothermal Method for Dye Decolorization under Visible Light Irradiation
by Mai Furukawa, Daichi Iwamoto, Koki Inamori, Ikki Tateishi, Hideyuki Katsumata and Satoshi Kaneco
Catalysts 2023, 13(8), 1179; https://doi.org/10.3390/catal13081179 - 02 Aug 2023
Cited by 3 | Viewed by 936
Abstract
Novel tungsten-modified mixed-valence tin oxides (Sn3O4) with two oxidation numbers, such as Sn2+ and Sn4+, were successfully prepared by the cetyltrimethylammonium bromide (CTAB)-assisted solvothermal method in one-step using tin (II) chloride dihydrate and sodium tungstate (IV) [...] Read more.
Novel tungsten-modified mixed-valence tin oxides (Sn3O4) with two oxidation numbers, such as Sn2+ and Sn4+, were successfully prepared by the cetyltrimethylammonium bromide (CTAB)-assisted solvothermal method in one-step using tin (II) chloride dihydrate and sodium tungstate (IV) dihydrate as the precursors for dye degradation of methyl orange (MO) under visible light irradiation. The synthesized materials were characterized by various techniques to investigate the surface/structural morphology and the optical property. The presence of tungsten and the optimized amount of CTAB in the preparation method were favorable for the photocatalytic dye degradation reaction. In particular, when 0.03 of CTAB was added to W-modified Sn3O4 (W-Sn3O4@CTAB) and its concentration was 0.6 mg/mL, 10 mg/L of MO could be decolorized almost completely in 40 min, with the apparent reaction rate constant of 0.0496 min−1. The improvement of photocatalytic activity for this proposed W-Sn3O4 results from increased reduction power, enhanced separation of electron–hole pairs, extended visible light absorption range, and optimized band structure by CTAB additive. The radical trapping experiments showed that the main reactive species during the photocatalytic reaction are superoxide ions. The developed photocatalysts may contribute to the development of environmental improvement technology. Full article
(This article belongs to the Special Issue Advances in Photocatalytic Wastewater Purification, 2nd Edition)
►▼ Show Figures

Figure 1

15 pages, 2344 KiB  
Article
Electrochemical Characterisation of the Photoanode Containing TiO2 and SnS2 in the Presence of Various Pharmaceuticals
by Gabrijela Radić, Klara Perović, Tayebeh Sharifi, Hrvoje Kušić, Marin Kovačić and Marijana Kraljić Roković
Catalysts 2023, 13(5), 909; https://doi.org/10.3390/catal13050909 - 20 May 2023
Cited by 3 | Viewed by 1406
Abstract
In this work, the behaviour of photoanodes made of TiO2, SnS2 and TiO2/SnS2 was examined in the presence and absence of pharmaceuticals diclofenac (DCF), memantine hydrochloride (MEM) and salicylic acid (SA). The focus of the current research [...] Read more.
In this work, the behaviour of photoanodes made of TiO2, SnS2 and TiO2/SnS2 was examined in the presence and absence of pharmaceuticals diclofenac (DCF), memantine hydrochloride (MEM) and salicylic acid (SA). The focus of the current research is on the following photoelectrochemical (PEC) characterisation methods: linear polarisation, electrochemical impedance spectroscopy (EIS), and open circuit potential (OCP) monitoring. Linear polarisation and EIS provided useful information about the interaction between the pharmaceuticals and the photocatalytic materials. The presence of the selected pharmaceuticals affects the OCP value, mainly due to the pH change. The results obtained by PEC characterisation were compared to the photocatalytic (PC) efficiency of pharmaceutical degradation. In addition to the photocurrent response, the linear voltammogram indicates the electrochemical oxidation of DCF and SA. Geometry optimizations using density functional theory (DFT) showed that the HOMO orbitals’ position of DCF and SA are above the position of the TiO2 HOMO level and below the position of the SnS2 HOMO level. Due to this, the characteristic current peak for DCF and SA was registered, but only for TiO2 and TiO2/SnS2 photoanodes. The oxidation current peak was not registered for MEM, although h+ scavenging properties were noticed for TiO2 in the presence of MEM. Apparently, this is an interplay between the protonated and non-protonated forms of MEM and the differences in their HOMO positions. Full article
(This article belongs to the Special Issue Advances in Photocatalytic Wastewater Purification, 2nd Edition)
►▼ Show Figures

Figure 1

21 pages, 5675 KiB  
Article
Photocatalytic Degradation of Ciprofloxacin by UV Light Using N-Doped TiO2 in Suspension and Coated Forms
by Sarah A. Abdulrahman, Zainab Y. Shnain, Salah S. Ibrahim and Hasan Sh. Majdi
Catalysts 2022, 12(12), 1663; https://doi.org/10.3390/catal12121663 - 18 Dec 2022
Cited by 8 | Viewed by 2337
Abstract
The presence of organic compounds such as ciprofloxacin in untreated pharmaceutical wastewater often poses a serious health risk to human and aquatic life when discharged into water bodies. One of the most effective means of removing ciprofloxacin from wastewater is photocatalytic degradation. However, [...] Read more.
The presence of organic compounds such as ciprofloxacin in untreated pharmaceutical wastewater often poses a serious health risk to human and aquatic life when discharged into water bodies. One of the most effective means of removing ciprofloxacin from wastewater is photocatalytic degradation. However, the synthesis of an effective photocatalyst that can degrade the organic pollutant in the wastewater is often a challenge. Hence, this study focuses on the synthesis and application of nitrogen-doped TiO2 (N-TiO2) in suspension and coated forms for the photocatalytic degradation of ciprofloxacin in wastewater by applying UV-light irradiation. The nitrogen-doped TiO2 photocatalyst was prepared by a co-precipitation process and characterized using energy-dispersive X-ray spectroscopy, scanning electron microscopy, and Fourier-transform infrared spectroscopy. The effects of the initial concentration of the ciprofloxacin (6, 12, 18, or 30 ppm), pH (3, 5, 7, or 9), and flow rate (0.4, 0.8, 0.95, or 1.5 L/min) on the degradation of the ciprofloxacin over the N-TiO2 were investigated. The results showed that the removal efficiency of ciprofloxacin was enhanced by increasing the initial ciprofloxacin concentration, while it was decreased with the increase in the feed flow rate. The best operating conditions were obtained using an initial ciprofloxacin concentration of 30 ppm, pH of 5, and feed flow rate of 0.4 L/min. Under these operating conditions, removal efficiencies of 87.87% and 93.6% were obtained for net TiO2 and N-TiO2 of 5 wt% in suspension form, respectively, while 94.5% ciprofloxacin removal efficiency was obtained using coated 5 wt% N-TiO2 after 2 h of photocatalytic degradation. Based on the response surface optimization strategy, a quadratic model was suggested to obtain mathematical expressions to predict the ciprofloxacin removal efficiency under various studied operational parameters. Full article
(This article belongs to the Special Issue Advances in Photocatalytic Wastewater Purification, 2nd Edition)
►▼ Show Figures

Figure 1

Review

Jump to: Research

29 pages, 3011 KiB  
Review
Titanium Dioxide as the Most Used Photocatalyst for Water Purification: An Overview
by Sanja J. Armaković, Maria M. Savanović and Stevan Armaković
Catalysts 2023, 13(1), 26; https://doi.org/10.3390/catal13010026 - 24 Dec 2022
Cited by 36 | Viewed by 8670
Abstract
Titanium dioxide (TiO2), one of the most frequently used materials in general, has emerged as an excellent photocatalytic material for environmental applications. In this review, principles and mechanisms of the photocatalytic activity of TiO2 have been analyzed. Structural and physical [...] Read more.
Titanium dioxide (TiO2), one of the most frequently used materials in general, has emerged as an excellent photocatalytic material for environmental applications. In this review, principles and mechanisms of the photocatalytic activity of TiO2 have been analyzed. Structural and physical specificities of TiO2 nanoparticles, such as morphology, crystal structure, and electronic and optical properties, have been considered in the context of photocatalytic applications. A review of the influence of several factors, such as the type and dimensions of photocatalyst particles, pH of the solution, the influence of oxidants/electron acceptors, and light intensity on photocatalytic properties of TiO2, has been provided. Superhydrophilicity as an intrinsic property of the TiO2 surface was discussed through surface reconstruction on TiO2 during the reversible hydrophilic changes. Additionally, attention was paid to improving the photocatalytic properties of TiO2 particles through aggregation and agglomeration. Full article
(This article belongs to the Special Issue Advances in Photocatalytic Wastewater Purification, 2nd Edition)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop