SnO_2对CuO-CeO_2/γ-Al_2O_3催化剂湿式氧化降解苯酚活性的影响  

Effect of SnO_2 on the Catalytic Activity of CuO- CeO_2/γ-Al_2O_3 Catalytic Wet Oxidation Degradation of Phenol

作　　者：孙晓君[1] 田海燕[1] 薛滨泰[1] 魏金枝[1] 张艳[1] 张玉双[2] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院 [2]大庆石化公司腈纶厂,黑龙江大庆163714

出　　处：《化学与生物工程》2004年第6期16-18,共3页Chemistry & Bioengineering

基　　金：黑龙江省自然科学基金资助项目(B00 10)

摘　　要：从电子助剂的角度考虑,以SnO2为添加剂,以γ Al2O3为载体,CuO为活性组分,CeO2为助剂,采用分层浸渍与混合浸渍相结合的方式制备出CuO SnO2 CeO2/γ Al2O3负载型湿式氧化催化剂。利用XPS对催化剂进行表征,研究Sn的掺杂对催化剂表面微观结构的影响,进而研究对其催化剂活性的影响。研究证明了Sn的掺杂可以提高催化剂表面Cu+的含量,从而提高催化剂表面晶格氧空位的数量。通过对苯酚的湿式氧化降解,得出催化剂表面晶格氧空位的数量是影响催化剂活性的主要因素。CuO- SnO_2-CeO_2/γ-Al_2O_3 catalyst was prepared by layering and mixing impregnation method,SnO_2 being chosen as the aids according to the function of electron aids, CuO being active component, CeO_2 being catalytic promoter, γ-Al_2O_3 being the substrate. XPS was carried out to investigate the effect of Sn on the microstructure of the catalyst surface and the effect on the catalytic activity. It was shown that the doping of Sn could increase Cu^+ content on the catalyst surface, as a result the quantity of oxygen vacancy was also increased. It could be concluded through the wet oxidation degradation of phenol that the quantity of oxygen vacancy on the surface of catalyst was the main factor affecting the activity of catalyst.

关 键 词：温式氧化 SNO2 掺杂 浸渍 

分 类 号：TG146.4[一般工业技术—材料科学与工程]