Xinjiang physical and chemical development of Z-type photocatalyst hydrogen production progress

Xinjiang physical and chemical development of Z-type photocatalyst hydrogen production progress

The development of clean and renewable energy is an inevitable choice for alleviating energy shortages and environmental degradation. Hydrogen is considered to be the ideal clean fuel due to its secondary product of combustion. Solar photocatalysis decomposes water into hydrogen, providing a highly promising technological path for the clean and efficient conversion and utilization of solar energy and eliminating environmental pollution, which has aroused the interest of scholars at home and abroad. However, a single catalyst has the problems of low visible light utilization or high electron hole recombination rate, which severely restricts its photocatalytic hydrogen production performance.

Researchers at the Research Institute of Environmental Science and Technology, Xinjiang Institute of Physics and Chemistry, Chinese Academy of Sciences, prepared Au nanoparticles by G deposition on g-C3N4 substrate by photodeposition method, and then loaded CdxZn1−xS solid solution on Au to prepare Z type CdxZn1−xS/Au. /g-C3N4 photocatalyst, its structure, morphology and optical properties were systematically studied. Using glucose as the sacrificial agent, the photocatalytic properties of Z-type photocatalysts for photocatalytic hydrogen production under visible light (λ>420 nm) were studied. The results showed that the hydrogen production performance of Cd0.8Zn0.2S/Au/g-C3N4 was 52.2-fold and 8.63-fold higher than that of Au/g-C3N4 and CdS/Au/g-C3N4 respectively; the hydrogen production activity of Z-type photocatalyst The increase was mainly due to the efficient separation of its photo-generated carriers. In addition, the introduction of Cd0.8Zn0.2S can suppress the production of by-products CO and CO2 in the photocatalytic process. This work provides new ideas for designing efficient photocatalytic hydrogen production catalysts.

The results of this study are published in the Science Bulletin as "front covers." This research work was supported by the National Natural Science Foundation of China, the “Light of the West” of the Chinese Academy of Sciences, and the Young Scientists of the Chinese Academy of Sciences.

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