Special Issue "Photocatalysis: Recent Developments and Technological Advancements"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: 31 May 2021.

Special Issue Editor

Prof. Dr. Wilfried Wunderlich
Website
Guest Editor
Material Science Department, Faculty of Engineering, Tokai University, 259-1292 Hiratsuka, Japan
Interests: photocatalytic materials

Special Issue Information

Dear Colleagues,

Water purification is one of the main issues for sustainable development for the future. After the discovery of the photocatalytic behavior of graphitic carbon nitride g-C₃N₄, research on catalysts has increased in order to improve their performance by combining with other composites such as nanometer-sized TiO₂, semiconductors like ZnO, ZnS, and CdS and noble metal nanoparticles. The fascinating properties of g-C₃N₄ include visible light response, good oxidation power, environmental friendliness, good chemical and thermal stability, metal-free nature, easy fabrication from precursors, and easy modifications of its polymer structure. The processing of inorganic nanoparticles has been improved by sol-gel techniques, deposition, like lase ablation, and hydrothermal methods. Typically, the active catalyst is deposited on a skeleton with high porosity consisting of stable oxides or carbonaceous materials. The photocatalytic performance strongly depends on the bandgap, but also other parameters, such as the recombination rate, carrier concentration, electron mobility, and modification of orbitals of attached particles such as dyes or nanosized noble metal particles. The photocatalytic performance increases, when the surface area becomes large, and the amount of absorbed solution and diffusion to the active surface is enhanced. Photocatalysts can not only improve the efficiency of various chemical reactions, but have also successfully demonstrated water purification through the degradation of organic pollutants, even including bacteria or viruses. This emerging interdisciplinary research is expected to increase its importance in the near future.

Prof. Dr. Wilfried Wunderlich
Guest Editor

Manuscript Submission Information

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Keywords

  • Photocatalysts
  • Nanomaterials
  • Water purification
  • Oxidation behavior
  • Bandgap

Published Papers (1 paper)

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Research

Open AccessArticle
Application of Photocatalytic Concrete Paving Blocks in Poland—Verification of Effectiveness of Nitric Oxides Reduction and Novel Test Method
Materials 2020, 13(22), 5183; https://doi.org/10.3390/ma13225183 - 17 Nov 2020
Abstract
Photocatalytic concrete is one of the most promising concrete technologies of the past decades. Application of nanometric TiO2 to cement matrices enables the reduction of harmful airborne pollutants. Although a number of implementations of this technology are described in this paper, problems [...] Read more.
Photocatalytic concrete is one of the most promising concrete technologies of the past decades. Application of nanometric TiO2 to cement matrices enables the reduction of harmful airborne pollutants. Although a number of implementations of this technology are described in this paper, problems related to test conditions are also reported. One major issue is the sufficient light irradiation that for higher latitudes can be significantly reduced. In this paper, a field campaign on the implementation of photocatalytic concrete pavement in Warsaw (52.23° N) is briefly described. Based on experience from the field campaign, a novel test method is developed. In the research, the effectiveness of nitric oxide reduction is verified at natural light irradiation for various dates of solar position at noon in central Poland (51.83° N). The results confirm the benefits of using photocatalytic materials at higher latitudinal locations. The experimental setup presented in the study combines the advantages of controlled measurement conditions typical in laboratory tests with the possibility of including natural sunlight conditions in the investigation process. Full article
(This article belongs to the Special Issue Photocatalysis: Recent Developments and Technological Advancements)
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