Recent Developments in Photocatalytic Water Treatment Technology

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

Deadline for manuscript submissions: 25 September 2024 | Viewed by 1124

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Universidad Autónoma de Baja California (UABC), Facultad de Ingeniería, Arquitectura y Diseño, Ensenada 22860, Baja California, México
Interests: semiconductors; metal oxides; catalytic activity; biosynthesis
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Special Issue Information

Dear Colleagues,

This Special Issue aims to critically review the latest advances in photocatalytic materials and the optimization of photocatalytic processes to enhance the efficiency and selectivity of contaminant degradation. The most innovative developments in nanocomposite materials, doping strategies, reactor design, and light energy sources are highlighted, with the aim of providing a deeper understanding of the practical applications and challenges remaining in the field of photocatalysis for water treatment.

Effective wastewater treatment is crucial to addressing the proliferating environmental challenges and ensuring the availability of clean water. In this context, there are now numerous alternatives to water treatment, but one particularly interesting alternative is photocatalysis; this utilizes materials that are able to accelerate chemical reactions by absorbing light, generally ultraviolet light or visible light. Photocatalysis has emerged as a promising technology with the capacity to degrade the contaminants present in water. This Special Issue, entitled "Recent Developments in Photocatalytic Water Treatment Technology", aims to provide a comprehensive exploration of the most recent advances in photocatalytic water treatment technology, with a particular emphasis on the significance of these developments in addressing the challenges associated with the contemporary environment. Photocatalysis is presented as a promising solution in this context, owing to its ability to degrade an extensive range of contaminants, including recalcitrant organic compounds, heavy metals, and pathogens, via the generation of reactive oxygen species and electrons in the presence of light.

Prof. Dr. Priscy Alfredo Luque Morales
Guest Editor

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Keywords

  • photocatalysis
  • water treatment
  • nanomaterials
  • catalysts
  • environmental sustainability
  • degradation of contaminants
  • advanced oxidation processes

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Published Papers (1 paper)

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Research

21 pages, 11794 KiB  
Article
Degradation of Organic Dye Congo Red by Heterogeneous Solar Photocatalysis with Bi2S3, Bi2S3/TiO2, and Bi2S3/ZnO Thin Films
by Eli Palma Soto, Claudia A. Rodriguez Gonzalez, Priscy Alfredo Luque Morales, Hortensia Reyes Blas and Amanda Carrillo Castillo
Catalysts 2024, 14(9), 589; https://doi.org/10.3390/catal14090589 - 2 Sep 2024
Viewed by 807
Abstract
In this work, bismuth sulfide (Bi2S3) thin films were deposited by a chemical bath deposition (CBD) technique (called soft chemistry), while titanium dioxide (TiO2) nanoparticles were synthesized by sol–gel and zinc oxide (ZnO) nanoparticles were extracted from [...] Read more.
In this work, bismuth sulfide (Bi2S3) thin films were deposited by a chemical bath deposition (CBD) technique (called soft chemistry), while titanium dioxide (TiO2) nanoparticles were synthesized by sol–gel and zinc oxide (ZnO) nanoparticles were extracted from alkaline batteries. The resulting nanoparticles were then deposited on the Bi2S3 thin films by spin coating at 1000 rpm for 60 s each layer to create heterojunctions of Bi2S3/ZnO and Bi2S3/TiO2. These materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The optical and contact angle analyses were undertaken by UV–Vis spectroscopy and a contact microscopy angle meter, respectively. The calculated band gap values were found to be between 1.9 eV and 2.45 eV. The Bi2S3 presented an orthorhombic structure, the TiO2 nanoparticles presented an anatase structure, and the ZnO nanoparticles presented a wurtzite hexagonal crystal structure. Furthermore, heterogeneous solar photocatalysis was performed using the Bi2S3, Bi2S3/ZnO, and Bi2S3/TiO2 thin film combinations, which resulted in the degradation of Congo red increasing from 8.89% to 30.80% after a 30 min exposure to sunlight. Full article
(This article belongs to the Special Issue Recent Developments in Photocatalytic Water Treatment Technology)
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