Facile synthesis of a surface plasmon resonance-enhanced Ag/AgBr heterostructure and its photocatalytic performance with 450 nm LED illumination
Facile synthesis of a surface plasmon resonance-enhanced Ag/AgBr heterostructure and its photocatalytic performance with 450 nm LED illumination
复制标题
表面等离子体共振增强 Ag/AgBr 异质结构的简便合成及其在 450 nm LED 照明下的光催化性能
DOI：
10.1039/c3dt32813a
复制
发表时间：
2013-01-01
影响因子：
4
通讯作者：
Liang, Changhao
中科院分区：
文献类型：
--
作者：
Dai, Kai;Lu, Luhua;Liang, Changhao
本文采用水热法在90 ℃的低温下成功地合成了Ag/AgBr异质结构。利用扫描电子显微镜、X射线衍射仪、能谱仪和紫外-可见漫反射光谱仪对产物的形貌、结构、结晶度和光学性能进行了表征。在450 nm LED阵列下，以亚甲基蓝为目标降解物，评价了Ag/AgBr异质结构的光催化活性。结果表明，Ag/AgBr异质结构的光催化活性远高于AgBr和Degussa P25。Ag/AgBr异质结构的可见光催化活性增强可归因于表面等离子体共振及其对光敏AgBr的协同效应。提出了等离子体激元协同增强光催化过程的机理。
In this paper, a plasmonic Ag/AgBr heterostructure was reduced by AgBr, which was successfully synthesized by a facile hydrothermal process at a temperature as low as 90 degrees C. The morphological and structural observation, crystallinity and optical performance of the products grown were carried out by using scanning electron microscopy, X-ray diffraction, energy dispersive spectrometry and UV-vis diffuse reflectance spectroscopy. The photocatalytic activities of Ag/AgBr heterostructures were evaluated by the degradation of methylene blue under 450 nm LED arrays. The results revealed that the plasmonic Ag/AgBr heterostructures exhibited much higher photocatalytic activities than pure AgBr and commercial Degussa P25. The visible-light photocatalytic activity enhancement of Ag/AgBr heterostructures could be attributed to the surface plasmon resonance and its synergistic effect on the photosensitive AgBr. Furthermore, a mechanism of the plasmon synergistically enhanced photocatalytic process was proposed.