Synthesis of three-component Cu2O/ZnO/Ag nanocrystal heterogeneous photocatalysts with high reactivity and stability for dye reduction

Literature Information

Publication Date 2023-10-17
DOI 10.1039/D3TA05424A
Impact Factor 12.732
Authors

Chih-Wu Chiang, Chieh-Yu Lai, Su-Wen Hsu


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Abstract

Semiconductor nanocrystals are widely used as photocatalysts for the degradation of organic dye molecules due to their strong electron transfer ability and high catalytic reactivity. However, as a photocatalyst with excellent performance, semiconductor nanocrystals still have some disadvantages, such as aggregation, photocorrosion during the reactions, and loss during recycling that need to be addressed. In response to these problems, it is necessary to improve the using efficiency of “active charges” of the photocatalysts and their stability in the recycling process, which can be achieved by transferring the unreacted “active charges” to other active materials and fixing the photocatalysts in the polymer matrix. Here, we designed nanocrystals with three components, Cu2O–ZnO–AgNC (silver nanocube), as photocatalysts with high stability and high reactivity for the degradation of Congo red molecules under irradiation in the visible light range. The high reactivity of Cu2O–ZnO–AgNC as a photocatalyst can be attributed to the generation of “active charges”, hot electrons from AgNC, and excited electron–hole pairs from Cu2O under visible light irradiation. Moreover, the photocorrosion of Cu2O can be suppressed by transferring the unreacted “active charges” to ZnO and the photocatalytic performance can be further improved. These results enable the design and synthesis of catalysts or photocatalysts with high catalytic performance for various reduction reactions.

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Source Journal

Journal of Materials Chemistry A

Journal of Materials Chemistry A
CiteScore: 19.5
Self-citation Rate: 4.7%
Articles per Year: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

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