Photoinduced Electron Storage in WO3/TiO2 Nanohybrid Material in the Presence of Oxygen and Postirradiated Reduction of Heavy Metal Ions
Photoinduced Electron Storage in WO3/TiO2 Nanohybrid Material in the Presence of Oxygen and Postirradiated Reduction of Heavy Metal Ions
复制标题
WO3/TiO2 纳米杂化材料在氧气存在下的光致电子存储和重金属离子的后辐照还原
DOI：
10.1021/jp9002774
复制
发表时间：
2009-07-30
影响因子：
3.7
通讯作者：
Zhao, Jincai
中科院分区：
文献类型：
--
作者：
Zhao, Dan;Chen, Chuncheng;Zhao, Jincai
设计并制备了一种以 WO3 簇作为电子存储位点的块状嵌入 TiO2 基纳米杂化材料。在 O2 存在的情况下，TiO2 激发产生的导带电子成功存储在这种纳米杂化材料中，并且电子自旋共振 (ESR) 测量进一步证实了 WO3 团簇中电子的存储。研究发现，纳米杂化颗粒表面氧的还原速度比原始 TiO2 慢得多。改变合成条件以优化杂化材料的储存行为。使用高分辨率透射电子显微镜 (HRTEM)、X 射线光电子能谱 (XPS)、傅里叶变换红外 (FTIR)、拉曼和 X 射线衍射研究了纳米杂化材料的结构。探索了这种纳米杂化材料在无需原位光照射的情况下还原处理有毒重金属离子的潜在环境应用。
A bulk-embedded TiO2-based nanohybrid material with WO3 clusters as the electron storage sites was designed and prepared. Conduction band electrons generated upon excitation of TiO2 were successfully stored in this nanohybrid material in the presence of O2, and the storage of electrons in WO3 clusters was further confirmed by the electron spin resonance (ESR) measurements. It is found that the reduction of oxygen on the surface of nanohybrid particles was much slower than that on pristine TiO2. Synthesis conditions were varied to optimize the storage behaviors of hybrid materials. The structure of the nanohybrid material was investigated using high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), Raman, and X-ray diffraction. Potential environmental application of this nanohybrid material for the reduction treatment of poisonous heavy metal ions without in situ light irradiation was explored.