TiO_2纳米管负载Pd-Ag催化1,2-二氯乙烷的选择性加氢脱氯  

Catalytic Hydrodechlorination of 1, 2-Dichloroethane over TiO_2 Nanotube Supported Pd-Ag Catalysts

作　　者：韩玉香[1] 邵芸[2] 万海勤[1] 许昭怡[1] 郑寿荣[1] 

机构地区：[1]南京大学环境学院污染控制与资源化研究国家重点实验室,南京210023 [2]中国石化北京化工研究院,北京100013

出　　处：《无机化学学报》2014年第3期481-486,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21107043;21277066)资助项目

摘　　要：以二氧化钛纳米管为载体,分别采用光沉积法和浸渍法制备负载Pd和Ag的双金属催化剂,并考察它们对1,2-二氯乙烷选择性加氢脱氯的行为。催化剂的UV-Vis,XRD,XPS等表征结果显示,在Ag负载量相近的情况下,光沉积法制备的催化剂较浸渍法制备的催化剂具备更显著的Ag富集现象。催化剂对1,2-二氯乙烷活性评价的结果表明,在Ag负载量相近时,光沉积法制备的催化剂对乙烯具有更高的选择性,且随着Ag负载量的提高,催化剂对乙烯选择性也逐渐增强。TiO2 nanotube supported Pd-Ag catalysts were prepared by the photodeposition and impregnation methods, and the catalystic hydrodechlorination of 1, 2-dichloroethane was investigated. The characterization results of UV-Vis, XRD and XPS showed that given similar Ag loading amount, much higher Ag enrichment was identified on the catalyst prepared by the photodeposition method than by the impregnation method. Accordingly, the catalyst prepared by the photodeposition method exhibit markedly enhanced ethylene selectivity for the hydrodechlorination of 1, 2-dichloroethane. Additionally, the ethylene selectivity was gradually increased with the Ag loading content.

关 键 词：催化加氢脱氯 1 2-二氯乙烷 光沉积 二氧化钛纳米管 Pd—Ag 

分 类 号：O614.411[理学—无机化学] O614.823[理学—化学]