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Molecules
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Recent Advances in Photocatalysts
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Recent Advances in Photocatalysts

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 4732

Special Issue Editors

Dr. Kunlei Wang

E-Mail
Guest Editor
Institute for Catalysis (ICAT), Hokkaido University, Sapporo 001-0021, Japan
Interests: nanomaterials; titania photocatalyst; photocatalytic application; renewable energy
Special Issues, Collections and Topics in MDPI journals
Dr. Dong Ma

E-Mail Website
Guest Editor
College of Resource and Environment, Qingdao Agricultural University, Qingdao 266109, China
Interests: aquatic chemistry; advanced oxidation processes; nanotechnology; photochemistry

Special Issue Information

Dear Colleagues,

The field of photocatalysis was established 50 years ago. Currently, research into photocatalytic materials is not limited to common semiconductor materials such as titanium oxide and zinc oxide, but also covers new materials such as graphene, Bi compounds, Ag-based compounds, etc., as well many composite structures studied and created by researchers. The most common applications of photocatalysis are water treatment, water decomposition, clean energy, carbon dioxide reduction, air purification, antibacterial sterilization, organic synthesis, etc.

This Special Issue " Recent Advances in Photocatalysts" aims to publish promising up-to-date original research papers on the preparation, mechanism and photocatalytic applications of new photocatalysts.

Potential topics include (but are not limited to) the following:

  • Advanced and innovative photocatalytic processes for the purification of water and/or air.
  • Preparation and characterization of new photocatalysts (both homogeneous and heterogeneous) for photocatalytic application and/or renewable energy.
  • Green and environmentally friendly photocatalytic processes for environmental purification and protection, photocatalytic application and renewable energy.

Original results from all areas of photocatalysts supplying new advances for mechanisms and applications are welcome.

Dr. Kunlei Wang
Dr. Dong Ma
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. Molecules is an international peer-reviewed open access semimonthly 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

  • nanomaterials
  • photocatalytic application
  • renewable energy
  • water treatment

Published Papers (3 papers)

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Research

16 pages, 4052 KiB  
Article
Controlled Synthesis and Visible-Light-Driven Photocatalytic Activity of BiOBr Particles for Ultrafast Degradation of Pollutants
by Xiaohui Ji, Chen Li, Junhai Liu, Tianlei Zhang, Yue Yang, Ruijin Yu and Xuegang Luo
Molecules 2023, 28(14), 5558; https://doi.org/10.3390/molecules28145558 - 20 Jul 2023
Cited by 2 | Viewed by 882
Abstract
For the purpose of regulating the visible-light-driven photocatalytic properties of photocatalysts, we selected BiOBr as the research target and various routes were used. Herein, via the use of a hydrothermal method with various solvents, BiOBr particles with controllable morphology and photocatalytic activities are [...] Read more.
For the purpose of regulating the visible-light-driven photocatalytic properties of photocatalysts, we selected BiOBr as the research target and various routes were used. Herein, via the use of a hydrothermal method with various solvents, BiOBr particles with controllable morphology and photocatalytic activities are obtained. In particular, through changing the volume ratio of ethylene glycol (EG) to ethanol (EtOH), BiOBr compounds possess microspheres, in which samples synthesized by using EG:EtOH = 1:2 have the highest photocatalytic activity, and can completely decompose RhB under visible light irradiation within 14 min. Furthermore, we also used different volume ratios of EG and H2O reaction solvents to prepare BiOBr particles so as to further improve its pollutant removal ability. When the volume ratio of EG to H2O is 1:1, the synthesized BiOBr particles have the best photocatalytic activity, and RhB can be degraded in only 10 min upon visible light irradiation. Aside from the reaction solvent, the impact of sintering temperature on the photocatalytic properties of BiOBr particles is also explored, where its pollutant removal capacities are restrained due to the reduced specific surface area. Additionally, the visible-light-triggered photocatalytic mechanism of BiOBr particles is determined by h+, ·OH and ·O2− active species. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysts)
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11 pages, 3884 KiB  
Article
Enriched Surface Oxygen Vacancies of Fe2(MoO4)3 Catalysts for a PDS-Activated photoFenton System
by Yang Qiu, Chuanxi Yang, Huimin Zhou, Jinqiu Zang, Yuqi Fan, Feng Dang, Guanwei Cui and Weiliang Wang
Molecules 2023, 28(1), 333; https://doi.org/10.3390/molecules28010333 - 31 Dec 2022
Cited by 7 | Viewed by 1663
Abstract
The environmentally benign Fe2(MoO4)3 plays a crucial role in the transformation of organic contaminants, either through catalytically decomposing oxidants or through directly oxidizing the target pollutants. Because of their dual roles and the complex surface chemical reactions, the [...] Read more.
The environmentally benign Fe2(MoO4)3 plays a crucial role in the transformation of organic contaminants, either through catalytically decomposing oxidants or through directly oxidizing the target pollutants. Because of their dual roles and the complex surface chemical reactions, the mechanism involved in Fe2(MoO4)3-catalyzed PDS activation processes remains obscure. In this study, Fe2(MoO4)3 was prepared via the hydrothermal and calcine method, and photoFenton degradation of methyl orange (MO) was used to evaluate the catalytic performance of Fe2(MoO4)3. Fe2(MoO4)3 catalysts with abundant surface oxygen vacancies were used to construct a synergistic system involving a photocatalyst and PDS activation. The oxygen vacancies and Fe2+/Fe3+ shuttle played key roles in the novel pathways for generation of •O2−, h+, and 1O2 in the UV–Vis + PDS + FMO-6 photoFenton system. This study advances the fundamental understanding of the underlying mechanism involved in the transition metal oxide-catalyzed PDS activation processes. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysts)
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17 pages, 7282 KiB  
Article
Efficient Degradation of Congo Red in Water by UV-Vis Driven CoMoO4/PDS Photo-Fenton System
by Huimin Zhou, Yang Qiu, Chuanxi Yang, Jinqiu Zang, Zihan Song, Tingzheng Yang, Jinzhi Li, Yuqi Fan, Feng Dang and Weiliang Wang
Molecules 2022, 27(24), 8642; https://doi.org/10.3390/molecules27248642 - 7 Dec 2022
Cited by 9 | Viewed by 1818
Abstract
In order to improve the catalytic activity of cobalt molybdate (CoMoO4), a PDS-activated and UV-vis assisted system was constructed. CoMoO4 was prepared by coprecipitation and calcination, and characterized by XRD, FTIR, Raman, SEM, TEM, XPS, TGA Zeta potential, BET, and [...] Read more.
In order to improve the catalytic activity of cobalt molybdate (CoMoO4), a PDS-activated and UV-vis assisted system was constructed. CoMoO4 was prepared by coprecipitation and calcination, and characterized by XRD, FTIR, Raman, SEM, TEM, XPS, TGA Zeta potential, BET, and UV-Vis DRS. The results showed that the morphology of the CoMoO4 nanolumps consisted of stacked nanosheets. XRD indicated the monoclinic structures with C2/m (C32h, #12) space group, which belong to α-CoMoO4, and both Co2+ and Mo6+ ions occupy distorted octahedral sites. The pH of the isoelectric point (pHIEP) of CMO-8 at pH = 4.88 and the band gap of CoMoO4 was 1.92 eV. The catalytic activity of CoMoO4 was evaluated by photo-Fenton degradation of Congo red (CR). The catalytic performance was affected by calcination temperature, catalyst dosage, PDS dosage, and pH. Under the best conditions (0.8 g/L CMO-8, PDS 1 mL), the degradation efficiency of CR was 96.972%. The excellent catalytic activity of CoMoO4 was attributed to the synergistic effect of photo catalysis and CoMoO4-activated PDS degradation. The capture experiments and the ESR showed that superoxide radical (·O2−), singlet oxygen (1O2), hole (h+), sulfate (SO4−·), and hydroxyl (·OH−) were the main free radicals leading to the degradation of CR. The results can provide valuable information and support for the design and application of high-efficiency transition metal oxide catalysts. Full article
(This article belongs to the Special Issue Recent Advances in Photocatalysts)
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