Preparation of Ti4O7/h-BN self-supported ceramic photoelectrode and its photoelectrocatalytic performance for water purification

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-02 DOI:10.1002/apj.3072

Shanshan Li, Yanan Gong, Md Azharul Hossain, Zeqi Jiang, Jiarong Zhang, Guowen Wang, Yinghuan Fu, Pengyuan Wang, Yu Song, Hongchao Ma

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引用次数: 0

Abstract

The construction of high-efficiency self-supported ceramic photoelectrode based on ideal semiconductor materials is essential for achieving effective degradation of pollutants by photoelectrocatalysis (PEC) technology. Herein, a Ti₄O₇/h-BN composite ceramic photoelectrode with a unique microstructure was fabricated by a step-by-step calcination process and used in PEC water pollution remediation. The PEC activity of Ti₄O₇ ceramic photoelectrode could be enhanced by introducing hexagonal boron nitride (h-BN) nanoparticles on the surface. The most optimized Ti₄O₇/h-BN photoelectrode exhibited the decolorization rate of active brilliant blue KN-R at about 97.79% in 30 min. The PEC activities could remain stable during five degradation cycles. The excellent photoelectrocatalytic performance of Ti₄O₇/h-BN ceramic photoelectrode could be attributed to the low Tafel slope, low charge transfer resistance, large electrochemical active area, and excellent photo-generated carrier separation efficiency. A type-II heterojunction was formed between the Ti₄O₇ and h-BN, which caused more effective carrier separation and enhanced the generation of dominant active species •O²⁻ and h⁺. This work provided a mature synthesis strategy of Ti₄O₇/h-BN self-supported ceramic photoelectrodes with excellent practical application prospects to achieve superior PEC performance for water purification.

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Ti4O7/h-BN 自支撑陶瓷光电电极的制备及其用于水净化的光电催化性能

要实现光电催化（PEC）技术对污染物的有效降解，基于理想半导体材料的高效自支撑陶瓷光电电极的构建至关重要。本文通过逐步煅烧工艺制备了具有独特微观结构的 Ti4O7/h-BN 复合陶瓷光电极，并将其用于 PEC 水污染修复。通过在 Ti4O7 陶瓷光电极表面引入六方氮化硼（h-BN）纳米颗粒，可提高其 PEC 活性。最优化的 Ti4O7/h-BN 光电极在 30 分钟内对活性亮蓝 KN-R 的脱色率约为 97.79%。在五个降解周期中，PEC 活性保持稳定。Ti4O7/h-BN 陶瓷光电极优异的光电催化性能可归因于其较低的塔菲尔斜率、较低的电荷转移电阻、较大的电化学活性面积和优异的光生载流子分离效率。Ti4O7 和 h-BN 之间形成了 II 型异质结，从而实现了更有效的载流子分离，并增强了主要活性物种 -O2- 和 h+ 的生成。这项工作提供了一种成熟的 Ti4O7/h-BN 自支撑陶瓷光电极合成策略，具有良好的实际应用前景，可在水净化领域实现优异的 PEC 性能。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.