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Enhanced Photocatalysis by Synergistic Piezotronic Effect and Exciton–Plasmon Interaction Based on (Ag‐Ag2S)/BaTiO3 Heterostructures
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-09-16 , DOI: 10.1002/adfm.202005716 Yanqiang Lei 1, 2 , Shuya Xu 1 , Mei Ding 2 , Linlin Li 1, 3, 4 , Qijun Sun 1, 3, 4 , Zhong Lin Wang 1, 5
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-09-16 , DOI: 10.1002/adfm.202005716 Yanqiang Lei 1, 2 , Shuya Xu 1 , Mei Ding 2 , Linlin Li 1, 3, 4 , Qijun Sun 1, 3, 4 , Zhong Lin Wang 1, 5
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Piezotronic and plasmonic effects are effective strategies to improve photocatalytic performance. Combining these two effects in one photocatalytic heterostructure is intriguing, but has yet to be reported. Here, a hybrid ternary structure ((silver‐silver sulfide)/barium titanate (Ag‐Ag2S)/BaTiO3) is introduced, where the synergistic exciton–plasmon interaction in Ag‐Ag2S and Ag2S/BaTiO3 heterojunction tuned by piezoelectric polarization can enhance the photon absorption and charge carrier separation to promote photocatalysis efficiency. The exciton–plasmon interaction in Ag‐Ag2S can amplify the plasmon resonance to the semiconductor region and enhance the light absorption of Ag2S. The piezoelectric polarization can tune the band structure of BaTiO3 and then change the heterojunction between Ag2S/BaTiO3 from Type I (i.e., straddling energy band alignments between BaTiO3 and Ag2S) to Type II (i.e., Z‐scheme system between BaTiO3 and Ag2S with a staggered energy band alignment), which can accelerate the separation of electron‐hole pairs. Using this hybrid material, a high methyl orange (MO) degradation rate up to 90% within 30 min is obtained, which is 20% higher than that of Ag/BaTiO3. The demonstrated hybrid material based on the synergistic piezotronic effect and exciton–plasmon interaction shows great promise in pollutant treatment with high efficiency.
中文翻译：
（Ag-Ag2S）/ BaTiO3异质结构的协同压电效应和激子-等离子体相互作用增强光催化作用
压电和等离子体效应是提高光催化性能的有效策略。将这两种效应结合在一个光催化异质结构中很有趣，但尚未有报道。在这里，介绍了一种混合三元结构（（银-银硫化物）/钛酸钡（Ag-Ag 2 S）/ BaTiO 3），其中Ag-Ag 2 S和Ag 2 S / BaTiO 3的激子-等离子体激元相互作用。通过压电极化调谐的异质结可以增强光子吸收和电荷载流子分离，从而提高光催化效率。Ag-Ag 2 S中的激子-等离子体激元相互作用可以放大等离子体激元对半导体区域的共振并增强Ag的光吸收2 S.压电极化可调谐的BaTiO的能带结构3，然后改变银之间的异质结2 S /的BaTiO 3从I型（即，跨越的BaTiO之间能带比对3和Ag 2 S）与II型（即， BaTiO 3和Ag 2 S之间的Z方案系统（具有交错的能带排列），可以加速电子-空穴对的分离。使用这种杂化材料，可以在30分钟内获得高达90％的高甲基橙（MO）降解率，比Ag / BaTiO 3高20％。基于协同压电效应和激子-等离子体激元相互作用的已证明杂化材料在高效处理污染物方面显示出广阔的前景。
更新日期：2020-09-16
中文翻译：
（Ag-Ag2S）/ BaTiO3异质结构的协同压电效应和激子-等离子体相互作用增强光催化作用
压电和等离子体效应是提高光催化性能的有效策略。将这两种效应结合在一个光催化异质结构中很有趣，但尚未有报道。在这里，介绍了一种混合三元结构（（银-银硫化物）/钛酸钡（Ag-Ag 2 S）/ BaTiO 3），其中Ag-Ag 2 S和Ag 2 S / BaTiO 3的激子-等离子体激元相互作用。通过压电极化调谐的异质结可以增强光子吸收和电荷载流子分离，从而提高光催化效率。Ag-Ag 2 S中的激子-等离子体激元相互作用可以放大等离子体激元对半导体区域的共振并增强Ag的光吸收2 S.压电极化可调谐的BaTiO的能带结构3，然后改变银之间的异质结2 S /的BaTiO 3从I型（即，跨越的BaTiO之间能带比对3和Ag 2 S）与II型（即， BaTiO 3和Ag 2 S之间的Z方案系统（具有交错的能带排列），可以加速电子-空穴对的分离。使用这种杂化材料，可以在30分钟内获得高达90％的高甲基橙（MO）降解率，比Ag / BaTiO 3高20％。基于协同压电效应和激子-等离子体激元相互作用的已证明杂化材料在高效处理污染物方面显示出广阔的前景。
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