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: closed (30 November 2021) | Viewed by 5194
Special Issue Editor
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
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Keywords
- Photocatalysts
- Nanomaterials
- Water purification
- Oxidation behavior
- Bandgap
