摘要
用光还原法制备了Pd/ZnO光催化剂(Pd/Zn原子比分别为1/100、2/100和3/100),以甲基橙为模拟有机污染物,对催化剂的光催化脱色性能进行了考察。光催化剂用XRD、紫外-可见漫反射和表面光电压谱仪进行了表征,结果表明:当Pd沉积量为2/100(Pd/Zn)时电子-空穴分离效应最高,且光催化脱色活性最高;沉积Pd后ZnO在可见光区的吸收增强;高的电子-空穴分离效应有利于提高ZnO光催化活性。
ZnO and Pd/ZnO photocatalysts with different molar ratio of Pd/Zn （1/100, 2/100 and 3/100） were prepared by photodeposition method. Photocatalysts prepared were studied by X-ray diffraction （XRD）, UV/Vis diffuse reflectance （DRS） and surface photovoltage spectra （SPS） techniques. The results show that 2/100 （Pd/Zn） prepared has the highest photoinduced charge separation rate. XRD results indicate that no peaks of Pd are detected in the 20 region from 20° to 60°. Pd/ZnO absorbs much more light than ZnO in the visible light region. Among all of the photocatalysts prepared, the 2/100 （Pd/Zn） sample possesses the best photocatalytic activity. High photoinduced charge separation rate is beneficial to the photocatalytic activity of ZnO.
出处
《贵金属》
CAS
CSCD
北大核心
2013年第3期17-19,23,共4页
Precious Metals
基金
四川省教育厅基金(No.09ZZ016)
四川理工学院博士启动基金(No.2010XJKRL007)
绿色催化四川省高校重点实验室开放课题(LYJ1102)资助
关键词
物理化学
ZNO
PD
异质结
光催化
physical chemistry
ZnO
Pd
Heterojunction
photocatalysis
