Recent Progress in Diverse Heterostructured Photocatalysts and Their Performance

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

Deadline for manuscript submissions: closed (15 January 2024) | Viewed by 1333

Special Issue Editor


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Guest Editor
College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
Interests: photocatalysis; photoelectrochemical; energy transfer photocatalysis; material characterization; environmental applications

Special Issue Information

Dear Colleagues,

The recent progress in diverse heterostructured photocatalysts has shown great promise in promoting photocatalytic performance in various applications. These advancements have focused on enhancing the efficiency of important reactions such as water splitting, methane oxidation, CO2 reduction, and organic degradation.

Photocatalysts play a vital role in harnessing solar energy to drive chemical reactions. By utilizing heterostructures, which consist of multiple semiconductor materials, researchers have been able to enhance the light absorption, charge separation, and catalytic activity of these materials. The heterostructured photocatalysts are successful in degrading organic pollutants under visible-light irradiation. In water splitting, they efficiently convert water into hydrogen and oxygen using sunlight. For methane oxidation, they effectively convert methane into less harmful byproducts. In CO2 reduction, they transform carbon dioxide into valuable fuels or chemicals.

These advancements offer promising solutions for energy and environmental challenges. By harnessing solar energy, heterostructured photocatalysts contribute to sustainable chemical transformations and pollution remediation. This Special Issue also includes combined processes that integrate photocatalysis techniques as pre-treatment or post-treatment stages.

Dr. Jingkai Yang
Guest Editor

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Keywords

  • photocatalysts
  • water splitting
  • methane oxidation
  • CO2 reduction
  • organic degradation

Published Papers (1 paper)

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Research

16 pages, 3828 KiB  
Article
Co3O4-rGO—Synthesis, Characterization, and Evaluation of Photocatalytic Activities
by Muhammad Saeed, Firas H. Albadran, Ameer Fawad Zahoor, Asif Nisar, Aamal A. Al-Mutairi, Sami A. Al-Hussain, Ali Irfan and Magdi E. A. Zaki
Catalysts 2024, 14(2), 96; https://doi.org/10.3390/catal14020096 - 24 Jan 2024
Viewed by 1119
Abstract
Water contamination with synthetic dyes is an escalating problem worldwide. Herein, Co3O4-decorated reduced graphene oxide (Co3O4-rGO) is reported as an effective heterogeneous photocatalyst for the decomposition of organic dyes. The synthesis of Co3O [...] Read more.
Water contamination with synthetic dyes is an escalating problem worldwide. Herein, Co3O4-decorated reduced graphene oxide (Co3O4-rGO) is reported as an effective heterogeneous photocatalyst for the decomposition of organic dyes. The synthesis of Co3O4-rGO was confirmed via spectroscopic techniques including XRD, XPS, TEM, and FTIR. After characterization, the prepared Co3O4-rGO composite was tested as a photocatalyst for the degradation of methylene blue and methyl orange. The photocatalytic efficiency of Co3O4-rGO was >95% after 60 min, corresponding to 200 mg/L as the initial concentration of each dye. The photodegradation of MB and MO was confirmed by BOD and COD measurements. Experimental parameters like the re-usability of Co3O4-rGO, the effect of catalyst dosage, and the effect of dye concentration on photocatalytic activity were also investigated. The photocatalytic activity of Co3O4-rGO for the degradation of MB was 2.13 and 3.43 times higher than that of Co3O4 and rGO, respectively. Similarly, the photocatalytic activity of Co3O4-rGO for the degradation of MO was 2.36 and 3.56 times higher than that of Co3O4 and rGO, respectively. Hence, Co3O4-rGO was found to be an efficient and reusable photocatalyst for the decomposition of selected dyes in the aqueous medium. Full article
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