中文摘要：

以水合碳酸锌为前驱体,利用激光复合加热蒸发技术,制得粒径分布均匀,平均粒径在30 nm左右的Ag^＋掺杂ZnO纳米晶半导体光催化剂.利用UV-Vis,TEM,AFM和XRD等进行了表征.对光催化体系降解亚甲基蓝（MB）的研究表明：悬浮Ag^＋掺杂ZnO纳米晶的悬浮水相体系中,Ag^＋的掺杂能有效地改善ZnO对亚甲基蓝的光催化降解性能.此外,H2O2能有效增强Ag^＋掺杂ZnO纳米晶对MB的降解效率,H2O2浓度为0.05 mol/L时可以使Ag^＋掺杂ZnO纳米晶的光催化效率提高近1倍.降解产物光谱分析表明：H2O2的存在优先使MB的苯环开环降解,并使其降解更彻底.

英文摘要：

The photocatalysts of Ag^＋-doped ZnO nanocrystals were synthesized by laser-induction complex heating technique from the precursor of Zn5（CO3）2（OH）6.The photocatalysts activity and photochemical degradation were characterized by applying TEM,AFM,XRD,UV-Vis,et al.The photodegradation of methylene blue（MB） dye in aqueous suspensions was investigated by using doped ZnO nanoparticles and undoped ZnO nanoparticles as photocatalyst.Moreover,the effects of H2O2 in the Ag^＋-ZnO-MB aqueous suspension were studied.The results indicated that the average particle size was 30 nm and the decolor efficiency to MB of Ag^＋-doped ZnO were better than that of undoped ZnO. The decolor efficiency of MB was enhanced about one times,and MB could be decomposed more completely,using Ag^＋-doped ZnO nanocrystals as photocatalyst together with 0.05 mol/L H2O2.