Water is one of the most important substances, which is critical for life-sustaining of all living creatures. Up to 2025, it is estimated that 50% of the people world-wide will face clean water crises. Therefore, there is an urgent need to find effective and economically viable methods to address this problem. Among many methods, heterogeneous photocatalysis has been recognized as one of the most appealing and potentially efficient advanced oxidation processes to address the environmental crises and renewable energy production. Up to know, many photocatalysts such as TiO2, ZnO, SnO2, g-C3N4, ZnS, … and their heterojunctions with different narrow band gap semiconductors and elemental (metallic and nonmetallic) doping in these semiconductors have been utilized in these processes. However, the practical applications of these photocatalysts are limited, because of their large band gap energies, rapid recombination of the photoinduced electron–hole pairs, or low stability. In your opinion, what are novel alternatives for these processes to effectively and rapidly degrade pollutants under visible-light irradiation?
This is an important question... various Two Dimensional (2D) layered materials showing good photocatalytic activity. I think, 2D layered materials are good candidates for photoreaction.
thank you, its a really good question
you mention almost all the known photocatalysis, for me the best choice photocatalysis in the future is the one based on p-n heterostructure nanomaterials and of course the most important is the photocatalysis prepared by the simplest route with abundance materials.
In my opinion, doping TiO2 with transition metals, such as Cd, Ni, Co, and Fe is one good choice to achieve a stable decomposition of organic matters. On the other hand, nanocomposites are now getting much more attention for such purpose. Just do a simple research on google scholar to find out the massive number of articles tackling this point. The main challenge of these nano materials to act as good photocatalyst are the stability, repeatably, and cost of production.
Regards,
This is an important question... various Two Dimensional (2D) layered materials showing good photocatalytic activity. I think, 2D layered materials are good candidates for photoreaction.
Dear Aziz Habibi-Yangjeh
I have a background in photocatalyst and my research focus in silver orthophosphate (Ag3PO4) based photocatalyst. Moreover, it shows a high-photocatalytic activity under visible light irradiation (under 530 nm with band energy of 2,4 eV) and had been explored in the dye removal or water pollution degradation. Based on my best knowledges, these photocatalyst is still have a big challenge and opportunity to explore more deeply (ie. stability, photocatalytic activity, near IR driven photocatalyst).
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