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Synthesis of Z-scheme Bi/TiO/WO·0.33HO heterojunction material for the enhanced photocatalytic degradation of pollutants

Journal of Materials Science: Materials in Electronics, ISSN: 1573-482X, Vol: 31, Issue: 14, Page: 11276-11285
2020
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Article Description

In this work, Bi spheres were deposited on bulk WO·0.33HO and TiO (P25) nanoparticles to form Z-scheme Bi/TiO/WO·0.33HO heterojunction material for the first time by a simple hydrothermal method. The as-prepared materials were comprehensively characterized by XRD, XPS, SEM, TEM, UV–Vis DRS, BET surface area, EIS, and Mott-Schottky analysis. The ternary Bi/TiO/WO·0.33HO composites exhibited superior degradation efficiency for RhB than pure WO·0.33HO, TiO (P25), and their binary composites. The degradation rate reached 99.84% after 30 min under simulated sunlight. The enhancement of photocatalytic activity could be attributed to the Z-scheme heterojunction system with metal Bi as an electronic medium, which greatly enhanced the efficiency of charge separation. This report demonstrated that Z-scheme Bi/TiO/WO·0.33HO heterojunction photocatalytic material has potential application value in dye wastewater treatment.

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