Bi4V2O11/石墨烯异质结光催化剂的制备及其在降解抗体污染物中应用

doi:10.11944/j.issn.1000-0518.2018.08.180148

摘要/Abstract

摘要：

发展和设计高效、廉价和稳定的光催化剂用于抗生素污染物降解仍然存在巨大的挑战。本文通过一种便捷的水热方法制备了Bi₄V₂O₁₁/石墨烯复合材料并用于可见光下抗生素污染物光催化降解。通过自由基追踪实验,确认了光催化降解过程中活性物质为h⁺和·OH基团。根据实验结果,提出了相应的反应机理。石墨烯的引入可以有效地促进光生电子-空穴对的分离,从而增强光催化活性。该复合催化剂展现出良好的活性和稳定性。该方法以石墨烯为载体制备了光催化降解材料,为高性能光催化剂的制备提供了参考。

关键词: 光催化剂, Bi₄V₂O₁₁, 石墨烯, 机理

Abstract:

Designing and developing active, cost-effective and stable photocatalysts for the degradation of antibiotic pollutants are still an ongoing challenge. Herein, the fabrication of Bi₄V₂O₁₁/reduced graphene oxide(BR) composite through a facile hydrothermal reaction, and the effective photocatalytic activity of BR composite towards the degradation of antibiotic pollutants under visible light are demonstrated. The active species of the photocatalytic system are proved to be h⁺ and ·OH radicals by free radical trapping experiments. Based on the results, a reasonably reaction mechanism to explain the improved photocatalytic activity was also given. The introduction of reduced graphene oxide (rGO) can promote the effective separation of photo-generated electron-hole pairs of Bi₄V₂O₁₁ materials, and ultimately increase its photocatalytic activity. As the results, the composite shows high activity and excellent stability towards the degradation of antibiotic pollutants. This method produces a high photocatalytic activity based on rGO support, providing a new avenue for designing excellent photocatalysts.

Key words: photocatalysts, Bi₄V₂O₁₁, graphene, mechanism

笪祖林, 赵勇, 施伟东. Bi₄V₂O₁₁/石墨烯异质结光催化剂的制备及其在降解抗体污染物中应用[J]. 应用化学, 2018, 35(8): 946-955.

DA Zulin, ZHAO Yong, SHI Weidong. Facile Preparation of Bi₄V₂O₁₁/Reduced Graphene Oxide Heterojunction Photocatalysts for the Degradation of Antibiotic Pollutants[J]. Chinese Journal of Applied Chemistry, 2018, 35(8): 946-955.

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Bi₄V₂O₁₁/石墨烯异质结光催化剂的制备及其在降解抗体污染物中应用

Facile Preparation of Bi₄V₂O₁₁/Reduced Graphene Oxide Heterojunction Photocatalysts for the Degradation of Antibiotic Pollutants

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