光催化
材料科学
表面等离子共振
光化学
电子顺磁共振
催化作用
介电谱
降级(电信)
电化学
等离子体子
纳米颗粒
纳米技术
光电子学
化学
有机化学
电极
核磁共振
电信
物理
物理化学
计算机科学
作者
Bifu Luo,Dongbo Xu,Di Li,Guoling Wu,Miaomiao Wu,Weidong Shi,Min Chen
标识
DOI:10.1021/acsami.5b03535
摘要
A novel Ag/Bi3TaO7 plasmonic photocatalyst has been prepared by a simple photoreduction process. The as-prepared Ag/Bi3TaO7 photocatalyst exhibited an enhanced photocatalytic activity for the degradation of tetracycline (TC) compared to that of a bare Bi3TaO7 catalyst. The 1 wt % Ag-loaded Bi3TaO7 sample showed the highest photocatalytic efficiency for TC degradation (85.42%) compared with those of the other samples. The enhanced photocatalytic activity could be ascribed to the synergistic effect of the surface plasmon resonance caused by Ag nanoparticles. Electrochemical impedance spectroscopy demonstrated that the incorporation of silver nanoparticles onto the Bi3TaO7 surface promoted the separation of photogenerated carriers. In addition, an electron spin resonance (ESR) and trapping experiment revealed that the photoinduced active species hydroxyl radical and superoxide radical were the main active species in the photocatalytic process of TC degradation. The photocatalytic reaction mechanism was discussed by active species trapping and ESR analysis.
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