上海大学学报(英文版)
上海大學學報(英文版)
상해대학학보(영문판)
JOURNAL OF SHANGHAL UNIVERSITY
2003年
3期
289-293
,共5页
陈静%刘引烽%桑文斌%华家栋%孟中岩
陳靜%劉引烽%桑文斌%華傢棟%孟中巖
진정%류인봉%상문빈%화가동%맹중암
photocatalysis%reduction%CO2%ZnS%nanocomposites%complex transformation method
Nanosized photocatalyst ZnS particles supported on silica and polyvinyl alcohol was successfully prepared by complex trans-formation method. The photocatalytic reduction of CO2 was carried out in the presence of nanosized ZnS catalyst irradiated by a high-pressure mercury-vapor lamp to give the main products of formaldehyde and ethanol. The catalytic ability of ZnS characterized by theuptaken rate of CO2 volume in the reaction system depended upon the preparing conditions of nanosized ZnS catalysts. Decreasing theconcentration of Na2 S and increasing the molar ratio of oxygen in the PVA to Zn2 + could result in the decreasing of the size of ZnS parti-cles but could not result in the monotonous increasing of the reduction rate of CO2. The mechanism of reduction of CO2 may be relatedto the H atoms and OH radicals, which form from H2 O by transmission of the electron-hole pairs from irradiated the nanosized ZnS.
