Ag/ZnO 纳米棒阵列的合成及其增强的光催化性能。

Synthesis of Ag/ZnO nanorods array with enhanced photocatalytic performance.

机构信息

CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, PR China.

出版信息

J Hazard Mater. 2010 Oct 15;182(1-3):123-9. doi: 10.1016/j.jhazmat.2010.05.141. Epub 2010 Jun 8.

DOI:10.1016/j.jhazmat.2010.05.141

PMID:20580489

Abstract

Silver-modified ZnO nanorods array has been prepared and the effect of silver modification has been studied. ZnO nanorods array were fabricated through a wet chemical route and a photo deposition method was taken to fabricate silver nano particulate on the ZnO nanorods. The structural and optical properties were characterized by field emission scanning electron microscope, high resolution transmission electron microscope, X-ray photoelectron spectroscopy, Raman, UV-vis and photoluminescence (PL) spectra. The UV photocatalytic activity of these materials was studied by analyzing the degradation of methylene blue (MB) in aqueous solution. The photocatalytic performance indicated that Ag deposit acted as not only electron sinks to enhance the separation of photoexcited electrons from holes, but also charge carrier recombination centers, so the optimized amount of Ag deposit was investigated.

摘要

银修饰的 ZnO 纳米棒阵列已经制备，并研究了银修饰的效果。通过湿化学途径制备了 ZnO 纳米棒阵列，并采用光沉积法在 ZnO 纳米棒上制备了银纳米颗粒。通过场发射扫描电子显微镜、高分辨率透射电子显微镜、X 射线光电子能谱、拉曼、紫外-可见和光致发光（PL）光谱对其结构和光学性能进行了表征。通过分析水溶液中亚甲基蓝（MB）的降解来研究这些材料的紫外光催化活性。光催化性能表明，Ag 沉积物不仅充当电子阱来增强光激发电子与空穴的分离，而且充当载流子复合中心，因此研究了最佳的 Ag 沉积量。