access icon free Enhanced visible-light photocatalytic activity by Ag3PO4–Ag–Bi2WO6 Z-scheme heterojunction

A novel material of Ag3PO4–Ag–Bi2WO6 Z-scheme heterojunction has been successfully synthesised using a simple deposition–precipitation method. In this work, the authors used diverse techniques to characterise the structure, catalytic performance, and morphology of the prepared materials. Meanwhile, the catalytic performance of prepared materials was evaluated by degrading organic pigment. The excellent catalytic performance of the material is according to the collaboration of Ag nanoparticles in the Ag3PO4–Ag–Bi2WO6 heterojunction. Ag nanoparticles enhance the stableness and activeness of the catalyst by acting as a charge transfer bridge between Ag3PO4 and Bi2WO6, which results in improving electron–hole pairs’ separation. Compared with pure Bi2WO6 and Ag3PO4–Bi2WO6 materials, Ag3PO4–Ag–Bi2WO6 has higher decomposition effectiveness of methylene blue under the same conditions. The photocatalytic mechanism was put forward and the process of the hole–electron pair's separation is discussed in detail, which is due to the formation of the Z-scheme heterojunction with Ag nanoparticles acted as a charge transfer bridge.

Inspec keywords: semiconductor growth; semiconductor materials; charge exchange; nanoparticles; surface chemistry; decomposition; photocatalysts; semiconductor heterojunctions; bismuth compounds; silver; photocatalysis; silver compounds; electron-hole recombination; nanofabrication; precipitation (physical chemistry); dyes

Other keywords: nanoparticles; Z-scheme heterojunction; semiconductor heterojunction; Ag3PO4-Ag-Bi2WO6; electron–hole pair separation; decomposition; methylene blue; charge transfer; morphology; organic pigment degradation; visible-light photocatalytic activity; deposition–precipitation method

Subjects: Charge carriers: generation, recombination, lifetime, and trapping (semiconductors/insulators); Photolysis and photodissociation by IR, UV and visible radiation; Other methods of nanofabrication; Heterogeneous catalysis at surfaces and other surface reactions; Other semiconductor materials; Semiconductor junctions; Ion-molecule, ion-ion, and charge-transfer reactions; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Nanometre-scale semiconductor fabrication technology

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2020.0212
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content/journals/10.1049/mnl.2020.0212
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