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Preparation of a Bi12O15Cl6@W18O49@g-C3N4/PDI heterojunction with dual charge transfer paths and its photocatalytic performance for phenolic pollutants
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2022-01-21 , DOI: 10.1016/j.seppur.2022.120539
Zhuzhu Zhang 1 , Jiadi Liu 1 , Pei-Yang Gu 1 , Rui Ji 1 , Liujun Jin 1 , Shiyuan Zhou 1 , Jinghui He 1 , Dongyun Chen 1 , Qingfeng Xu 1 , Jianmei Lu 1
Affiliation  

A novel plasmonic Bi12O15Cl6@W18O49@g-C3N4/PDI photocatalyst with dual charge transfer paths was prepared via a solvothermal method using W18O49 nanowires grown on Bi12O15Cl6 nanosheets, followed by loading graphitic carbon nitride/ pyromellitic acid dianhydride (g-C3N4/PDI) onto the resulting Bi12O15Cl6@W18O49 via simple calcination. The heterojunction displayed outstanding photocatalytic performance in the degradation of bisphenol A (BPA) under simulated sunlight illumination, achieving an efficiency of 100% with respect to the removal of BPA (10 ppm) within 30 min. The results of five recycling experiments and an X-ray diffraction analysis before and after degradation showed that the photocatalyst had a relatively stable structure and properties. The investigation of the mechanism regarding the enhanced activity of the plasmonic photocatalyst revealed that dual charge transfer paths and the localized surface plasma resonance effect significantly improved the photogenerated electron transport efficiency and light absorption capacity of the Bi12O15Cl6@W18O49@g-C3N4/PDI composite, which can effectively activate molecular oxygen, producing superoxide radicals and hydroxyl radicals. This study provides a novel platform for the application of the localized surface plasmon resonance effect in photocatalysis via the development of a photocatalyst with dual charge transfer paths.



中文翻译:

具有双电荷转移路径的Bi12O15Cl6@W18O49@g-C3N4/PDI异质结的制备及其对酚类污染物的光催化性能

使用生长在 Bi 12 O 15 Cl 6纳米片上的 W 18 O 49纳米线,通过溶剂热法制备了具有双电荷转移路径的新型等离子体 Bi 12 O 15 Cl 6 @W 18 O 49 @gC 3 N 4 /PDI 光催化剂,随后通过将石墨碳氮化物/均苯四酸二酐 (gC 3 N 4 /PDI) 加载到生成的 Bi 12 O 15 Cl 6 @W 18 O 49上通过简单的煅烧。该异质结在模拟阳光照射下在降解双酚A(BPA)方面表现出出色的光催化性能,在30分钟内去除BPA(10 ppm)的效率达到100%。5次回收实验和降解前后的X射线衍射分析结果表明,该光催化剂具有相对稳定的结构和性能。对等离子体光催化剂活性增强机理的研究表明,双电荷转移路径和局部表面等离子体共振效应显着提高了 Bi 12 O 15 Cl 6 @W的光生电子传输效率和光吸收能力。18 O 49 @gC 3 N 4 /PDI复合材料,能有效活化分子氧,产生超氧自由基和羟基自由基。本研究通过开发具有双电荷转移路径的光催化剂,为局部表面等离子体共振效应在光催化中的应用提供了一个新平台。

更新日期:2022-01-25
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