In-situ Synthesis of P25-MPTMS-CdS by Reverse Micellar Method and Study on Their Photochemical Properties

doi:10.7517/j.issn.1674-0475.2004.04.244

Abstract

Abstract: CdS nanocrystallites prepared in reverse micellar systems were immobilized onto P25 particles which had been modified by 3-mercaptopropyltrimethoxysilane(MPTMS).The resulting P25-MPTMS-CdS particles were characterized by UV-Vis spectra and TEM.Their photocatalytic activity for the degradation of methyl orange dye was investigated.The results indicate P25-MPTMS-CdS photocatalysts have high photocatalytic activities both within UV and visible range.After 18 h of photoirradiation(λ>400 nm),the UV-Vis spectra show that CdS nanoparticles are well resist to photoirradiation,and have good photostability.

Key words: P25-MPTMS-CdS, reverse micellar, silylation agent, composite semiconductor, photocatalysis

CLC Number:

ZHU Yi-ping, ZHANG Jin-long. In-situ Synthesis of P25-MPTMS-CdS by Reverse Micellar Method and Study on Their Photochemical Properties[J]. Imaging Science and Photochemistry, 2004, 22(4): 244-250.

References

[1] Colvin V L, Goldstein A N,Alivisators A P. Semiconductor nanocrystals covalently bound to metal surfaces with selfassembled monolayers[J]. J. Am. Chem. Soc., 1992,114: 5221-5230.
[2] Sant P A, Kamat P V. Interparticles electron transfer between size-quantized CdS and TiO₂ semiconductor nanoclusters[J].Phys. Chem. Chem. Phys.,2002,4:198-203.
[3] Hirai T, Suzuki K, Hironori O, Komasawa I. Preparaton and photocatalytic properties of composites ClS nanoparticlestitanium dioxide particles[J]. J. Coll. lntersurf. Sci.,2001,244:262-265.
[4] 郝恩才,孙轶鹏,杨柏,沈家骢.CdS/TiOh复合纳米微粒的原位合成及性质研究[J].高等学校化学学报,1998,8:1191-1194.Hao E C,Sun T P,Yang B,Shen J C. Synthesis and properties of CdS/TiO₂ coupled semiconductor nanoparticles[J].Chemical Journal of Chinese Universities, 1998,8:1191-1194.
[5] Flood R, Enright B, Allen M, et al. Determination of band edge energies for transparent nanocrystalline TiO₂-CdS sandwich electrodes prepared by electrodepositon[J]. Solar Energy and Solar Cells, 1995,39:83-98.
[6] Yang Y, Chen H L, Mei Y F, et al. CdS nanocrystallites prepared by chemical and physical templates[J]. Acta Materialia, 2002, 50: 5085-5090.
[7] Kortan A R,Hull R,Opila R L, et al. Nucleation and growth of Cdse on ZnS quantum crystallites seeds, and vice versa,in inverse micelle media[J]. J. Am. Chem. Soc., 1990,112:1327-1332.
[8] Motte L, Billouder F, Lacaze E, et al. Self-organization of size-selected nanoparticles into three-dimensional superlattices[J]. Adv. Mater., 1996,8(12): 1018-1020.
[9] 施罗特尔w.半导体的电子结构与性能[M].北京:科学出版社,2001,109-111.Shilotel W. Electronic Structure and Properties of Semiconductors[M]. Beijing: Science Publishing House, 2001,109111.
[10] Hirai T, Bando Y, Komasawa I. Immobilization of CdS nanoparticles formed in reverse micelles onto alumina particles and their photocatalytic properties[J]. J. Phys. Chem. B,2002,106: 8967-8970.
[11] Hirai T, Hironori O, Komasawa I. Preparation of semiconductor nanoparticle-polyurea composites using reverse micellar systems via an in situ diisocyanate polymerization[J]. J. Phys. Chem. B, 1999,103:10120-10126.
[12] Hirai T, Saito T, Komasawa I. Recovery and mobilization of metal sulfide nanoparticles from reverse micellar system onto thiol-modified polystyrene particles[J]. J. Phys. Chem. B,2000,104:11639-11643.
[13] Feng X, Fryxell G E,Wang L Q, Kim A Y, Liu J, Kemmer K M. Functionalized monolayers on odered mesoporous supports[J]. Science, 1997,276: 923-926.
[14] Wellmann H, Rathousky J,Wark M, Zukal A, Schulz-Ekloff G. Formation of CdS nanoparticles within functionalized siliceous MCM-41[J]. Micro. Meso. Mater.,44: 419-425.
[15] Yin H B,Wada Y J,Kitamura T,Sakata T,Mori H,Yanagida S. Enhanced photocatalytic dechlorination of 1,2,3,4-tetrachlorobenzene using nanosized CdS/TiO₂ hybrid photocatalyst under visible light irradiation[J]. Chem. Lett.,2000, (1): 334-335.
[16] Hirai T, Jocelyn P R, Kentaro L, Bonamali Pal, et al. Preparation of novel silica-cadmium sulfide composite nanoparticles having adiustable void space by size-selective photoetching[J]. J. Am. Chem. Soc., 2003,125:316-317.