Enhanced Photocatalytic Activity over Ti, Zn, or Sn-Based Catalysts

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

Deadline for manuscript submissions: 20 December 2025 | Viewed by 960

Special Issue Editors


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Guest Editor
Facultad de Ingeniería Mochis, Universidad Autonoma de Sinaloa, Los Mochis, Mexico
Interests: green synthesis; photodegradation; metal oxide; modification; radiation solar; graphene
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Guest Editor
Universidad Autónoma de Sinaloa, Fuente de Poseidón y Prol. Angel Flores, S.N., Los Mochis 81223, Mexico
Interests: thin films; semiconductors; photocatalysis; electrocatalysis; green synthesis
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa (UAS), Los Mochis 81223, Sinaloa, Mexico
Interests: nanoparticles; green synthetics; semiconductors; ambient purification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In this Special Issue, photocatalysis holds tremendous potential for addressing pressing global challenges related to pollution, energy, and sustainable development, making it an exciting and rapidly evolving field of research and innovation. We encourage articles to face several challenges, including limited photocatalyst efficiency, selectivity of reactions, and scalability. Researchers are actively exploring strategies to enhance photocatalytic activity, improve stability, and broaden the scope of photocatalytic reactions. We focus on developing novel photocatalyst materials with tailored properties, such as narrow bandgaps, for enhanced light absorption, efficient charge separation, and improved catalytic performance. This Special Issue is especially targeted in the oxides based on Ti, Zn, or Sn, which have great potential and include modifications, doping, photosensitization nanocomposites, and derived enhanced innovative materials and processes. Also, the photocatalysis approach is applied to degrade toxic dyes and compounds such as dyes, pesticides, and drugs, including alcohol and CO2 reductions.

Dr. Andres Castro-Beltrán
Dr. Clemente Guadalupe Alvarado-Beltrán
Dr. Horacio Edgardo Garrafa-Gálvez
Guest Editors

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Keywords

  • green synthesis
  • metal oxide
  • nanoparticles
  • photocatalysis
  • photodegradation of pollutants
  • photosensitization
  • nanocomposites

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Published Papers (1 paper)

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Research

18 pages, 3706 KB  
Article
Controllable Preparation of TiO2/SiO2@Blast Furnace Slag Fiber Composites Based on Solid Waste Carriers and Study on Mechanism of Photocatalytic Degradation of Urban Sewage
by Xinwen Luo, Jinhu Wu, Guangqian Zhu, Xinyu Han, Junjian Zhao, Yaqiang Li, Yingying Li and Shaopeng Gu
Catalysts 2025, 15(8), 755; https://doi.org/10.3390/catal15080755 - 7 Aug 2025
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Abstract
Photocatalytic composite materials (TiO2/SiO2/BFSF) were first fabricated using the sol–gel method of loading SiO2 and TiO2 on blast furnace slag fibers (BFSFs) in sequence and using them as a new carrier. Then, TG-DTA, XRD, BET, SEM-EDS, and [...] Read more.
Photocatalytic composite materials (TiO2/SiO2/BFSF) were first fabricated using the sol–gel method of loading SiO2 and TiO2 on blast furnace slag fibers (BFSFs) in sequence and using them as a new carrier. Then, TG-DTA, XRD, BET, SEM-EDS, and UV-Vis absorption spectra, as well as spectrophotometric measurements, were employed to analyze the physicochemical properties of TiO2. The influence of SiO2 coating, the number of impregnations in TiO2 sol, the calcination temperature, and the number of repeated usages on the activity of TiO2/SiO2/BFSF was researched by analyzing the degradation of methylene blue (MB) aqueous solution. The results show that SiO2 could increase the load of TiO2, impede the growth of TiO2 grains, and inhibit the recombination of electron–hole pairs, ultimately enhancing the photocatalytic activity of samples. The activity of TiO2/SiO2/BFSF first quickly increased and then slowly decreased with an increase in the loading times of TiO2 sol and calcination temperature. After three impregnations in TiO2 sol and calcining at 450 °C for 2.5 h, a uniform and compact anatase TiO2 thin film was deposited on the surface of TiO2/SiO2/BFSF, showing the strongest activity. When this sample was used to degrade MB aqueous solution for 180 min under ultraviolet light irradiation, the degradation proportion reached a maximum of 96%. After four reuses, the degradation ratio could still reach 67%. In addition, three potential photocatalytic mechanisms were proposed. Finally, the high-value-added application of blast furnace slag for preparing photocatalytic composite materials was achieved, successfully turning solid waste into “treasure”. Full article
(This article belongs to the Special Issue Enhanced Photocatalytic Activity over Ti, Zn, or Sn-Based Catalysts)
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