Immobilization of CdS nanoparticles from reverse micellar system onto mesoporous organosilicates and their photocatalytic properties
Immobilization of CdS nanoparticles from reverse micellar system onto mesoporous organosilicates and their photocatalytic properties
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DOI：
10.1016/j.materresbull.2005.07.037
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发表时间：
2006-01
影响因子：
5.4
通讯作者：
T. Hirai;M. Ota
中科院分区：
文献类型：
--
作者：
T. Hirai;M. Ota
采用反胶束体系制备了CdS纳米粒子，并将其固定在两种巯基修饰的周期性介孔有机硅（PMOS）分子筛上。观察到的t-PMOS的颗粒筛分效果，在该CdS纳米颗粒的固定随着纳米颗粒尺寸的增加而减少。然后将所得的CdS-PMOS（I）和CdS-PMOS（II）用作光催化剂，用于从2-丙醇水溶液中产生H2。与CdS-PMOS（I）相比，CdS-PMOS（II）对光照射更稳定，显示出更高的光催化活性。PMOS固定的CdS纳米粒子上产生的H2的量大于介孔二氧化硅（MCM-41）固定的CdS纳米粒子（CdS-L-FM 41）上产生的H2的量。
CdS nanoparticles, prepared in reverse micellar systems, were immobilized onto two types of thiol-modified periodic mesoporous organosilicates (PMOS), t-PMOS(I) and t-PMOS(II) by a simple procedure via the addition of t-PMOS and mild stirring. A particle-sieving effect of the t-PMOS was observed, in that the immobilization of the CdS nanoparticles was decreased with increasing the nanoparticle size. The resulting CdS-PMOS(I) and CdS-PMOS(II) were then used as photocatalysts for the generation of H2from 2-propanol aqueous solution. CdS-PMOS(II), which was more stable against photoirradiation, showed higher photocatalytic activity, compared to CdS-PMOS(I). The quantity of H2generated on the PMOS-immobilized CdS nanoparticles was greater than that obtained from mesoporous silica (MCM-41)-immobilized CdS nanoparticles (CdS-L-FM41).