Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (08S): 897-901.doi: 10.3866/PKU.WHXB200408zk01

• ARTICLE •     Next Articles

Preparation of Spherical Nano-structured PMAA/CdS Composites by a Microgel Template Method

Zhang Ying;Fang Yu;Lin Shu-Yu;Liu Jing;Yang Juan-Ling   

  1. School of Chemistry and Materials Science; Applied Acoustics Institute, Shaanxi Normal University, Xi′an 710062
  • Received:2003-05-08 Revised:2003-06-05 Published:2004-08-15
  • Contact: Fang Yu

Abstract: Poly(methacrylic acid)/CdS (PMAA/CdS) spherical organic-inorganic composites with core-shell structures were prepared by utilizing polymeric microgel template effect on inorganic precipitation. The composites were produced via two steps. PMAA microgels containing Cd(Ac)2 were prepared by an inverse emulsion polymerization method. Then, H2S was introduced slowly into the system under stirring, and the metal ions were deposited within the microgels as CdS. The PMAA/CdS composites were obtained after washing treatment. The surface of the composites exhibited uniform micro- and nano-structured morphologies. Moreover, the surface structure of the micro-particles can be adjusted by changing the preparing conditions. In addition, ultrasound treatment makes the surface of particles much more smooth. XRD analysis shows that CdS in the composite is in crystalline state and is of face-centered structure. Furthermore, the composites are photoluminescence active due to presence of CdS.

Key words: Micro-gels, Organic-inorganic composites, Poly(methacrylic acid),  Template method, CdS