中文摘要：

采用配位均匀共沉淀法制备出ZnO／Ag／CdCO，纳米复合光催化剂，用TEM、XRD、FT—IR、ICP等对产物的形貌、微观结构及组成进行了表征，着重研究了反应物配比及Cd（NO3）2浓度对ZnO／Ag／CdCO3纳米复合光催化剂催化降解甲基橙光催化活性的影响规律，结果表明，n（Zn^2＋）：n（Ag^＋）：n（Cd^2＋）=21：1．76：1．75，Cd（NO3）2浓度为0．168mol·dm^-3时制得的纳米复合光催化剂对甲基橙（MO）的降解率较ZnO／Ag提高51％，ZnO／Ag／CdCO，对MO的光催化降解符合一级反应动力学方程，表观速率常数为1．4551h^-1，是ZnO／Ag的7倍。

英文摘要：

The ZnO/Ag/CdCO3 nanocomposite photocatalysts were prepared by coordination-coprecipitation method. The morphology, microstructure and component were characterized by TEM, XRD, FT-IR, and ICP. The influence of reactants ratio and Cd （NO3）2 concentrations on the photocatalytic activity for methyl orange photodegradation over ZnO/Ag/ CdCO3 were studied. The result indicated that the photodegradation ratio of methyl orange over ZnO/Ag/CdCO3 nanocomposite photocatalysts, which were prepared by selecting n （Zn2＋）：n （Ag＋）：n （Cd2＋） molar ratio of 21：1.76：1.75 and Cd（NO3）2 concentration of 0.168 mol·dm^-3, increased 51% compared to ZnO/Ag. The photo degradation ratio of methyl orange over ZnO/Ag/CdCO3 according with first-order reaction kinetics equation and the determined reaction-rate constant （k） of ZnO/Ag/CdCO3 was 1.4551 h^-1 which was 7 times bigger than ZnO/Ag.