王琼生;王世铭;

• 1:福建师范大学化学与材料学院

摘要(Abstract)：

以天然高分子壳聚糖为软模板,采用水热方法制备了纳米CdS空心微球,合成产物采用XRD,TEM,DRS等手段进行了表征.将合成的纳米CdS空心微球作为光催化剂,应用于可见光光催化制备低相对分子质量的壳聚糖的实验中.考察了光催化剂用量、壳聚糖浓度及反应气氛等因素对光催化氧化降解反应的影响,推测了CdS可见光催化制备低聚壳聚糖的机理.结果表明:可见光催化为低相对分子质量壳聚糖的可控制备提供了一条有效新途径.

关键词(KeyWords)： 壳聚糖模板;CdS空心微球;可见光催化;壳聚糖

Abstract:

Keywords:

基金项目(Foundation): 福建省自然科学基金资助项目(2006J0251/U0650007Z0513009);; 福建省教育厅资助项目(JB05313)

作者(Authors): 王琼生;王世铭;

参考文献(References)：

• [1]蒋挺大.甲壳素[M].北京:中国环境科学出版社,1996.
• [2]Shao J,Yang Y M.Studies on preparation of oligoglucosamine by oxidative degradation under microwave irradia-tion[J].Polymer Degrad Stability,2003,82(33):395-398.
• [3]Wang S M,Huang Q Z,Wang Q S.Study on synergetic degradation of chitosan with ultraviolet light and hydrogenperoxide[J].Carbohydrate Research,2005,340(6):1143-1147.
• [4]黄金凤,王世铭,黄群增,等.钨磷酸催化H2O2氧化降解壳聚糖的研究[J].应用化学,2006,23(1):34-38.
• [5]Alivisatos A P.Perspectives on the physical chemistry of semiconductor nanocrystals[J].J Phys Chem,1996,100(31):13226-13239.
• [6]Shao M W,Xu F,Peng Y Y,et al.Microwave-templated synthesis of CdS nanotubes in aqueous solution at roomtemperature[J].New J Chem,2002,26(10):1440-1442.
• [7]Li Y D,Liao H W,Qian Y T,et al.Nonaqueous synthesis of CdS nanorod semiconductor[J].Chem Mater,1998,10(9):2301-2303.
• [8]Li Z,Du Y M,Zhang Z L,et al.Preparation and characterization of CdS quantum dots chitosan biocomposite[J].React Funct Polym,2003,55(1):35-43.
• [9]范金石,陈国华,孙明昆,等.壳聚糖特性粘数的快速测定[J].青岛海洋大学学报,2002,32(2):296-300.
• [10]Kortum G.Reflectance Spectroscopy[M].New York:Springer-Verlag,1969.
• [11]Wu W Y,Schulman J N,Hsu T Y,et al.Effect of size nonuni-formity on the absorption spectrum of a semicon-ductor quantum dot system[J].Appl Phys Lett,1987(51):710.
• [12]张林.光催化和酶法制备低聚壳聚糖的研究[D].青岛:青岛大学,2006.
• [13]覃彩芹,杜予民.壳聚糖的降解及其结构表征[J].孝感学院学报,2002,22(6):5-9.
• [14]Lu S J,Song X F,Cao D Y,et al.Synthesis and combustion catalytic activity of nanoparticle Pb(II)-gallate[J].J Appl Poly Sci,2004,91(6):3497-3503.
• [15]赵玉清,袁传军.壳聚糖Mn2+的配位作用及其红外光谱[J].松辽学刊:自然科学版,2000,3:28-30.
• [16]Tian F,Liu Y,Hu K,et al.The depolymerization mechanism of chitosan by hydrogen peroxide[J].J MateriSci,2003,38(23):4709-4712.
• [17]Tang Walter Z,Huang C P.Photocatalyzed oxidation pathways of 2,4-dichlorophenol by CdS in basic and acidicaqueous solutions[J].War Res,1995,29(2):745-756.
• [18]陈德文,刘延秋,易筱筠,等.表面过剩S2-对CdS光催化的影响与带位匹配[J].物理化学学报,2001,17(9):781-787.