碳掺杂氧化锌的制备及性能研究  

Preparation and property study of ZnO doped with carbon

作　　者：黄雅丽[1] 

机构地区：[1]闽江学院化学与化学工程系,福建福州350108

出　　处：《化学工程与装备》2015年第12期35-39,58,共6页Chemical Engineering & Equipment

摘　　要：以蔗糖为原料,采用超声浸渍法,制备碳掺杂氧化锌光催化剂,利用分光光度法对碳掺杂氧化锌光催化降解碱性橙的性能进行研究。主要探讨了碳的掺杂比例、催化剂的煅烧温度、催化剂投入量及碱性橙的初始浓度等因素对光催化性能的影响。实验结果表明:最佳碳掺杂比例为0.7wt.%;催化剂最佳的煅烧温度为400℃;最佳的催化剂用量为2.4g/L;碱性橙溶液的初始浓度为10 mg/L时,光催化效果最佳。紫外-可见吸收谱图显示,碱性橙分子中的发色基团被降解破坏,可能降解为一些小分子化合物。XRD表征结果说明碳掺杂后氧化锌晶型没有发生改变,碳元素可能代替锌原子进入氧化锌晶格而且氧化锌的结晶度提高;催化剂的红外光谱图表明碳掺杂氧化锌的羟基峰比纯氧化锌的宽,改善了氧化锌的表面状态。这些都可能是碳掺杂氧化锌光催化活性提高的原因。ZnO doped with carbon photocatalysts were prepared by using impregnation method, with sucrose as raw material. The photocatalytic degradation of basic orange was studied through spectrophotometry. Some factors having influence on the photocatalytic degradation of basic orange such as the doping ratio of carbon, the sintering temperature ofthe catalysts ,the dosage of catalyst and initial concentration of basic orange were investigated .The result of the experiments showed that best carbon doping ratio was 0. 7%wt, the best sintering temperature of catalysts was 400~C, the best catalyst dosage was 2.4g/L, when the initial concentration of basic orange was lOmg/L, it could get better photocatalytic result .It was revealed in the UV-Yis spectrum that the chromophore of basic orange molecule was damaged and the molecules was possibly degraded to small molecules. The XRD characterization results suggested that the crystalline of ZnO doped with carbon did not change, and carbon elements might have replaced the Zn atoms into the crystal lattice and improving the crystallinity of ZnO; The FTIR characterization results showed that the hydroxyl peak of ZnO doped with carbon was wider than that of pure ZnO, which could improve the surface state of ZnO. All these might improve the photocatalytic activity of ZnO.

关 键 词：氧化锌 碳掺杂 碱性橙 光催化 

分 类 号：TQ132.41[化学工程—无机化工]