Immobilization of CdS nanoparticles from reverse micellar system onto mesoporous organosilicates and their photocatalytic properties |
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| Affiliation: | 1. Institute of Fine Chemistry and Industry, Henan University, Kaifeng 475004, PR China;2. Department of Chemistry, Iowa State University, Ames, IA 50010, United States;3. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, PR China;1. Laboratory of Adsorption and Catalysis, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium;2. Laboratory of Biomedical Physics, Department of Physics, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium;3. Flemish Institute for Technological Research, VITO, Boerentang 200, B-2400 Mol, Belgium;4. EMAT, Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;1. División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro (UAQ), Centro Universitario, 76000 Querétaro, Qro., Mexico;2. Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain;3. Chemical Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia |
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| Abstract: | 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 H2 from 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 H2 generated on the PMOS-immobilized CdS nanoparticles was greater than that obtained from mesoporous silica (MCM-41)-immobilized CdS nanoparticles (CdS-L-FM41). |
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