Integrating photonic bandgaps with surface plasmon resonance for the enhancement of visible-light photocatalytic performance
Integrating photonic bandgaps with surface plasmon resonance for the enhancement of visible-light photocatalytic performance
复制标题
将光子带隙与表面等离子体共振相结合以增强可见光光催化性能
DOI：
10.1039/c5ta06955f
复制
发表时间：
2015-11
影响因子：
11.9
通讯作者：
Xianzhi Fu
中科院分区：
文献类型：
--
作者：
Sugang Meng;Danzhen Li;Xianliang Fu;Xianzhi Fu
加强光捕获和促进光生载流子分离是提高光催化剂性能的有效策略。受此启发，本工作通过在氧化锌光子晶体(ZnO-PC)上沉积金纳米颗粒(NPs)制备了一种复合光催化剂。利用布拉格定律对氧化锌-聚碳酸酯的光子带隙进行了实验调谐，将氧化锌-聚碳酸酯的慢光子(SP)效应与金纳米颗粒的表面等离子体共振(SPR)进行了耦合。透射谱结果表明，当ZnO-PC的SP效应与Au纳米颗粒的SPR匹配良好时，Au纳米颗粒的可见光吸收可以得到很大的放大。在可见光照射下，Au/ZnO-PC具有较高的光催化降解罗丹明B的活性，其降解动力学常数(1.42h−1)是著名的N掺杂TiO2光催化剂(TiO2xNx，0.22h−1)的5.6倍，是市售纳米氧化锌的24.8倍(0.05h−1)。Au的SPR效应、ZnO-PC的SP效应以及氧化锌和Au纳米颗粒之间的异质结构协同作用，使其具有较高的光催化性能，可以增强可见光的捕获，促进载流子的分离。根据活性物种分析结果，初步提出了可能的反应机理。这项工作不仅为提高光催化效率提供了一条有效的途径，而且有助于更好地理解PC在光催化反应中的作用。
Intensifying the light harvesting and promoting the separation of photoinduced charge carriers are effective strategies to boost photocatalyst performance. Inspired by these insights, a hybrid photocatalyst was fabricated in this work by the deposition of Au nanoparticles (NPs) on a ZnO photonic crystal (ZnO-PC). The photonic band-gap of the ZnO-PC was tuned experimentally by Bragg's law to couple the slow photon (SP) effect of the ZnO-PC with the surface plasmon resonance (SPR) of Au NPs. Transmission spectra results indicated that, when the SP effect of the ZnO-PC matched well with the SPR of Au NPs, the visible light absorption of Au NPs could be substantially amplified. The hybrid Au/ZnO-PC showed high photocatalytic activity for the degradation of RhB under visible light irradiation, and the degradation kinetic constant (1.42 h−1) is ca. 5.6-fold higher than that of the famous N doped TiO2 (TiO2−xNx, 0.22 h−1) and 24.8-fold higher than that of the commercial ZnO NPs (0.05 h−1). The synergistic effects of the SPR of Au, the SP effect of the ZnO-PC, and the heterostructures between ZnO and Au NPs account for the high photocatalytic performance, which can enhance the harvesting of visible light and promote the separation of charge carriers. A possible reaction mechanism was tentatively proposed based on the active species analysis result. The work not only provides an effective route to enhance photocatalytic efficiency, but also contributes to a better understanding of the role of PCs in the photocatalytic reaction.
登录
查看更多内容
影响因子：
9.5
作者：
Mu, Jingbo;Chen, Bin;Liu, Yichun
通讯作者：
Liu, Yichun
影响因子：
11.9
作者：
Cai, Zhongyu;Xiong, Zhigang;Teng, Jinghua
通讯作者：
Teng, Jinghua
将等离子体纳米粒子与 TiO2 光子晶体集成以增强可见光驱动的光催化作用
影响因子：
11.4
作者：
Lu, Ying;Yu, Hongtao;Zhao, Huimin
通讯作者：
Zhao, Huimin
影响因子：
3.7
作者：
Li, Jingxia;Xu, Jianhua;Fan, Kangnian
通讯作者：
Fan, Kangnian
影响因子：
29.4
作者：
Paul G. O’Brien;N. Kherani;S. Zukotynski;G. Ozin;E. Vekris;Nicolas Tetreault;A. Chutinan;S. John;A. Mihi;H. Míguez
通讯作者：
Paul G. O’Brien;N. Kherani;S. Zukotynski;G. Ozin;E. Vekris;Nicolas Tetreault;A. Chutinan;S. John;A. Mihi;H. Míguez