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采用浸渍法制备了MoO3/P25催化剂(MoO3/P25(x),x为MoO3与P25质量比),用X射线衍射、紫外-可见漫反射光谱、傅里叶变换红外光谱及拉曼光谱等手段对样品进行了表征,并用催化降解亚甲基蓝考察了催化剂在可见光区的催化活性.结果表明,MoO3在P25表面最大单层负载量对应的MoO3与P25质量比在0.1左右.单层分散的氧化钼物种与P25之间有较强的相互作用,降低了P25禁带宽度,提高了催化剂对可见光的吸收.当MoO3与P25质量比大于0.1时,会生成晶相MoO3,催化剂对可见光的吸收反而随MoO3担载量增加而降低.催化剂禁带宽度不是决定其可见光下催化降解亚甲基蓝活性的唯一因素.具有适宜禁带宽度和一定晶相MoO3含量的MoO3/P25(0.25)表现出最佳活性.

参考文献

[1] Takeda K;Fujiwara K .[J].Water Research,1996,30:323.
[2] Wang C M;Heller A;Gerischer H .[J].Journal of the American Chemical Society,1992,114:5230.
[3] Litter M I;Navio J A .[J].Journal of Photochemistry and Photobiology A: Chemistry,1996,98:171.
[4] Kamat P V .[J].Chemical Reviews,1993,93:267.
[5] 张金龙;陈锋;何斌.光催化[M].上海:华东理工大学出版社,2004:84.
[6] Liu Y;Wang SP;Ma XB .Activity and surface properties of titanium oxide modified silica supported molybdenum oxide catalysts for transesterification of dimethyl oxalate with phenol[J].Industrial & Engineering Chemistry Research,2007(4):1045-1050.
[7] Kubacka A;Colon G;Fernandez-Garcia M .[J].Catalysis Today,2009,143:286.
[8] (S)tengl V;Bakardjieva S .[J].Journal of Physical Chemistry C,2010,114:19308.
[9] Panagiotou G D;Petsi T;Bourikas K;Kalampounias A G Boghosian S Kordulis C Lycourghiotis A .[J].Journal of Physical Chemistry C,2010,114:11868.
[10] Bergwerff, JA;Visser, T;Leliveld, BRG;Rossenaar, BD;de Jong, KP;Weckhuysen, BM .Envisaging the physicochemical processes during the preparation of supported catalysts: Raman microscopy on the impregnation of Mo onto Al2O3 extrudates[J].Journal of the American Chemical Society,2004(44):14548-14556.
[11] Santos E B;de Silva J M;Mazali I O .[J].VIBRATIONAL SPECTROSCOPY,2010,54:89.
[12] Lee SH.;Seong MJ.;Tracy CE.;Mascarenhas A.;Pitts JR.;Deb SK. .Raman spectroscopic studies of electrochromic a-MoO3 thin films[J].Solid state ionics,2002(1/2):129-133.
[13] Zhang J;Li M J;Feng Z C;Chen J Li C .[J].Journal of Physical Chemistry B,2006,110:927.
[14] Elder S.H. .The Discovery and Study of Nanocrystalline TiO_2-(MoO_3) Core-Shell Materials[J].Journal of the American Chemical Society,2000(21):5138-5146.
[15] Stoyanova A;Iordanova R;Mancheva M;Dimitriev Y .[J].JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS,2009,11:1127.
[16] Lopez T;Ortiz E;Gomez R;Picquart M .[J].Journal of Sol-Gel Science and Technology,2006,37:189.
[17] Li C;Xin Q;Wang K L;Guo X X .[J].Applied Spectroscopy,1991,45:874.
[18] 韩维屏;尹喜林;李永战 .[J].催化学报,1992,13:19.
[19] 马洪磊;薛成山.纳米半导体[M].北京:国防工业出版社,2009:306.
[20] 刘英俊;谢有畅;解刚;唐有祺 .[J].催化学报,1985,6:101.
[21] 桑丽霞,钟顺和,肖秀芬,王希涛,谭建华,周智泉.MoO3-TiO2/SiO2上光促表面催化甲烷和水合成甲醇和氢气[J].高等学校化学学报,2004(06):1115-1119.
[22] 王静;张光晋;杨文胜;姚建年 .[J].化学学报,2005,63:1951.
[23] Song K Y;Park M K;Kwon Y T;Lee H W Chung W J Lee W I .[J].Chemistry of Materials,2001,13:2349.
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