分层纳米结构 BiVO4/Bi4V2O10 异质结用于压电催化降解有机染料,ACS Applied Nano Materials

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分层纳米结构 BiVO4/Bi4V2O10 异质结用于压电催化降解有机染料
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-07-21 , DOI: 10.1021/acsanm.3c02202
Xiaoyao Yu ₁ , Hao Wang ₁ , Yiling Li ₁ , Ying Wu ₁

Affiliation

本工作旨在展示BiVO ₄ /Bi ₄ V ₂ O ₁₀纳米结构异质结复合材料在压电催化中的应用。溶剂热法制备的BiVO ₄ /Bi ₄ V ₂ O _{10复合材料利用振动能实现染料降解。}研究了影响复合催化剂压电催化性能的各种因素。_{BiVO 4} /Bi ₄ V ₂ O ₁₀超声振动 45 分钟后，罗丹明 B (RhB) 降解率最高，达到 99.3%140℃溶剂热3小时制备复合催化剂。对所制备的催化剂的结构、形貌和光学性质进行了广泛的表征。该复合材料良好的压电催化活性归因于涂覆纳米片的纳米多孔球的分级形貌，以及BiVO 4 和_Bi 4 _V 2 _O 10_之间异质结结构的形成，有效分离了超声诱导的电子-空穴对。并抑制了它们的重组。基于 BiVO ₄和 Bi ₄ V ₂ O _{10的能带势}提出了压电催化染料降解的合理机制，并通过各种自由基清除剂的猝灭效应证实了这一机制。_{这项工作展示了BiVO 4} /Bi ₄ V ₂ O ₁₀纳米复合材料在压电催化应用中的潜在用途，并为水净化压电催化剂的设计和制备提供了宝贵的见解。

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Hierarchical Nanostructured BiVO4/Bi4V2O10 Heterojunctions for Piezocatalytic Degradation of Organic Dyes

This work was designed to show the application of BiVO₄/Bi₄V₂O₁₀ nanostructured heterojunction composites in piezocatalysis. The BiVO₄/Bi₄V₂O₁₀ composites prepared by a solvothermal method realized dye degradation via utilizing vibration energy. Various factors affecting the piezocatalytic property of the composite catalyst were investigated. The highest rhodamine B (RhB) degradation rate of 99.3% was achieved after 45 min of ultrasonic vibration on the BiVO₄/Bi₄V₂O₁₀ composite catalyst prepared with 3 h of solvothermal time at 140 °C. The structure, morphology, and optical property of the as-prepared catalysts were extensively characterized. The good piezocatalytic activity of the composite was ascribed to the hierarchical morphology of the nanoporous sphere coated with nanoflakes, and the formation of a heterojunction structure between BiVO₄ and Bi₄V₂O₁₀, which effectively separated the ultrasound-induced electron–hole pairs and suppressed their recombination. Based on the band potentials of BiVO₄ and Bi₄V₂O₁₀, a plausible mechanism for piezocatalytic dye degradation was proposed, which was confirmed by the quenching effect of various radical scavengers. This work demonstrates the potential use of BiVO₄/Bi₄V₂O₁₀ nanocomposites in piezocatalytic applications and provides valuable insights into the design and preparation of piezocatalysts for water purification.

更新日期：2023-07-21

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