Metal oxide Photocatalysts for Environmental Remediation

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

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 3188

Special Issue Editor


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Guest Editor
Carbon Composite Energy Nanomaterials Research Centre, Woosuk University, Wanju-Gun, Jeollabuk-do 54896, Republic of Korea
Interests: photocatalysis; wastewater treatment; H2 release; energy; biomedical
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Special Issue Information

Dear Colleagues,

Environmental pollution is one of the most serious global issues that affects the Earth’s entire living population. Therefore, there is a strong demand for effective, green and eco-friendly technology for environmental protection. In recent years, semiconductor metal oxide-based photocatalysis has emerged as a powerful technique for environmental remediation. The suitable electronic structure, optical properties, and charge transport characteristics are the important features of metal oxide nanostructures that make them promising candidates in photocatalysis. So far, a number of metal oxide-based nanostructures and their composites have been applied for the treatment of wastewater, air purification, and antimicrobial disinfection, as well as biomedical applications.

This Special Issue will present the most recent and significant developments in metal oxide nanostructures or their composites photocatalysts. Both original research articles and reviews are welcome for submission.

The potential topics include, but are not limited to, the following items:

  • Design and development of metal oxide-based photocatalysts;
  • Photocatalytic removal of air and water pollutants;
  • Environmental photocatalyst;
  • Heterogeneous catalysts;
  • Antibacterial;
  • Wastewater treatment;
  • Toxicity reduction;
  • CO2 reduction;
  • Photocatalysis.

Dr. Bishweshwar Pant
Guest Editor

Manuscript Submission Information

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Published Papers (1 paper)

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Research

12 pages, 3276 KiB  
Article
TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
by Thanh-Hiep Thi Le, Thanh-Trang Bui, Hao Van Bui, Van-Duong Dao and Loan Le Thi Ngoc
Catalysts 2021, 11(7), 761; https://doi.org/10.3390/catal11070761 - 23 Jun 2021
Cited by 10 | Viewed by 2561
Abstract
This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and [...] Read more.
This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@IP-TiO2 is realized by photoreduction method. The morphological, structural, and optical properties of the materials are investigated by scanning electron microscopy, X-ray diffraction, ultraviolet–visible (UV-VIS) absorption spectroscopy, and photoluminescence spectroscopy. Their photocatalytic performances are studied by the degradation of rifampicin antibiotic under the visible-light irradiation generated by an LED lamp. The results demonstrate that the IP-TiO2 is composed of mesopores arranged in the honeycomb structure and strongly absorbs visible light in the wavelength range of 400–500 nm. This facilitates the visible-light catalytic activity of IP-TiO2, which is further enhanced by the surface modification by Ag nanoparticles. Our studies on the UV-VIS absorption and photoluminescent properties of the materials reveal that the presence of Ag nanoparticles not only enhances the visible-light absorption of IP-TiO2, but also reduces the recombination of photogenerated electrons and holes. These two factors create a synergic effect that causes the enhanced photocatalytic performance of Ag@IP-TiO2. Full article
(This article belongs to the Special Issue Metal oxide Photocatalysts for Environmental Remediation)
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