Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (1): 124-128.

• Articles • Previous Articles     Next Articles

Rapid Fabrication of CdS Nanocrystals with Well Mesoporous Structure Under Ultrasound Irradiation at Room Temperature

YU Chang-lin1*, ZHOU Wan-qin2,3, YU Jim-my4, YANG Jian-gao5, FAN Qi-zhe1   

  1. 1. School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, P. R. China;;
    2. School of Information Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, P. R. China;
    3. Fujian Provincial Key Laboratory of Photocatalysis-State Key Laboratory Breeding Base, Fuzhou University, Fuzhou 350002, P. R. China;
    4. Department of Chemistry, Center of Novel Functional Molecules, and Environmental Science Programme, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P. R. China;
    5. Engineering Research Center of High-efficiency Development and Application Technology of Tungsten Resources, Ministry of Education, Jiangxi University of Science and Technology, Ganzhou 341000, P. R. China
  • Received:2011-06-20 Revised:2011-09-07 Online:2012-01-25 Published:2011-12-27
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21067004), the Natural Science Foundation of Jiangxi Province, China(No.2010GZH0048) and the Open Foundation of State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, China(No.200906).

Abstract: Sphere-like mesoporous CdS nanocrystals with high crystallinity and big surface area were successfully fabricated by ultrasound irradiation at room temperature. The as-synthesized CdS with and without ultrasound irradiation was investigated by the characterizations of X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), and Brunauer-Emmett-Teller(BET) surface areas. The photocatalytic activity of the CdS was evaluated by photocatalytic degradation of methyl orange under visible light(λ>420 nm) irradiation. A possible mechanism for the formation of the CdS nanocrystals with mesoporous structure under ultrasound irradiation was proposed. The results show that both the template role of the triblock copolymer of P123 and the effect of ultrasound-induced aggregation are mainly responsible for the formation of mesoporous structure. On the other hand, the energy generated from acoustic cavitation can effectively accelerate the crystallization process of the amorphous CdS.

Key words: CdS, Crystallinity, Mesoporous structure, Ultrasound-induced aggregation