铈掺杂纳米ZnO结构与室温脱硫性能的相关性研究

作     者：李芬 闫波 邵纯红 姜安玺 贲岳 闫立龙 LI Fen;YAN Bo;SHAO Chun-Hong;JIANG An-Xi;BEN Yue;YAN Li-Long

作者机构：哈尔滨工业大学市政环境工程学院哈尔滨150090 

出 版 物：《无机化学学报》 (Chinese Journal of Inorganic Chemistry)

年 卷 期：2006年第22卷第10期

页      面：1895-1898页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：国家自然科学基金资助项目(No.50478026) 

主　　题：铈掺杂 室温脱硫 相关性 氧化锌 

摘      要：Nano-ZnO desulfurizer doped with cerium was prepared by homogeneous precipitation. The bulk and surface structures were characterized by TG-DTA, XRD, XPS and TEM. The desulfurizing performance at ambient temperature was studied. The results show that at ambient temperature the desulfurizing activities of nano-Ce-ZnO desulfurizer are closely related to the particle size, the electron density on desulfurizer surface and the quantity of active sites. Compared with nano-ZnO, nano-Ce-ZnO desulfurizer calcined at 270 ℃ showed smaller particle size and higher surface electron density, which favored the adsorption and reaction of H2S, resulting in improved desulfurizing activity at ambient temperature since the quantity of Zn(2-δ)+ became greater by electron gain of zinc ion from cerium ion. The tendency for zinc and cerium to be separated out as individual oxide from Ce-ZnO desulfurizer would increase as the calcination temperature was raised. The enrichment of cerium on the surface of ZnO made decrease the active sites for H2S adsorption, which led to the decrease in desulfurization activity at ambient temperature.