摘要
采用离子交换-沉积法,制备出CdS/Al-MCM-41负载型光催化剂(CdS/M41),利用UV-Vis、XRD、ICP-AES和SEM-EDS等测试手段对催化剂进行了表征。分析结果表明,CdS已进入Al-MCM-41孔道内;CdS为六方晶系,CdS的引入没有改变沸石骨架的有序结构及其形貌特征;UV-Vis吸收边出明显蓝移,是量子尺寸的体现。考察了不同反应介质中,CdS/M41光催化分解硫化氢制氢性能。实验结果表明,以0.35mol/LNa2S～0.25mol/LNa2SO3的混合水溶液为反应介质时,CdS/M41光催化产氢速率可达43.96mmol/g·hcat.(CdS),是纯CdS光催化剂的9.85倍。
CdS nanopartiele loaded in the pore of Al-MCM-41 zeolite （CdS/M41） was prepared by ion exchange ＆ precipitation method, and the crystalline structure of CdS/M41 was characterized by XRD, UV-Vis, ICP-AES and SEM-EDS. The XRD results revealed that the hexagonal structure peaks corresponding to CdS were obviously found in the pattern of CdS/M41, which was good for photocatalytic reaction. A blue shift of CdS absorption edge compared to the bulk CdS was found in UV-Vis. The framework and morphology of Al-MCM-41 zeolite wasn＇t influenced by CdS nanoparticles, which were observed directly by XRD and SEM. The photocatalytic properties of H2S decomposition to produce H2 were evaluated in different reaction media. The results showed that the production rate of H2 over CdS/M41was 43.96 mmol/g·h cat.（CdS） and 9.85 times higher than that over pure CdS in the mixed solution of the 0.35 mol/L Na2S-0.25 mol/L Na2SO3.
出处
《化学与粘合》
CAS
2009年第2期1-4,共4页
Chemistry and Adhesion
基金
国家863计划项目(编号:2007AA03z337)
黑龙江省杰出青年基金项目(编号:JC200615)
黑龙江省国际合作项目(编号:WC05A13)
哈尔滨市对俄科技合作项目(编号:2006AA4BE053)
关键词
硫化镉
沸石负载
分解硫化氢
光催化
制氢
CdS
zeolite-loaded
hydrogen sulfide decomposition
photocatalysis
hydrogen production
