燃烧法快速合成乳白色棒状纳米氧化锌及其光催化研究

摘要

Zinc nitrate as the oxidant, ascorbic acid as reducing agent and combustion agent, milky and rod-like zinc oxide rapid synthesized by combustion method. The sample was characterized by XRD, IR, UV, SEM. The Rhodamine B acted as target of degradation, the experiment inspected various sample, illumination time, dosage of zinc oxide, dosage of H2O2 , pH value and rotation speed of centrifuge impact on photocatalytic degradation of Rhodamine B. The optimal experiment conditions: zinc nitrate: ascorbic acid is 1 : 3, ZnO of 0. 4g/50mL,H2O2 of 0. 2mL/50mL, pH value 8, rotating at 2500r/min, Rhodamine B faded to colorless in 150min.%以硝酸锌为氧化剂,抗坏血酸为还原剂和燃烧剂,采用燃烧法快速制备乳白色棒状纳米氧化锌.用XRD,IR,UV,SEM等技术手段进行了表征.以罗丹明B为目标降解物,考察了不同样品、光照时间、催化剂用量、双氧水加入量、Ph值、离心机转数对罗丹明B催化效果的影响.最佳的光催化条件为:硝酸锌与抗坏血酸摩尔比为1∶3、催化剂用量为0.4g/50 L、双氧水用量为0.2mL/50mL、Ph为8、转速为2500r/min,在150min内罗丹明B褪为无色.