Ag_(3)PO_(4)增强TiO_(2)光催化活性研究  

Enhancement of Photocatalytic Activity of TiO_(2)by Ag_(3)PO_(4)

作　　者：李飞 顾林 汪钰萍 周红 丁志杰 LI Fei;GU Lin;WANG Yuping;ZHOU Hong;DING Zhijie(College of Chemistry and Materials Enginerring,Anui Science and Technology University,Fengyang 233100,China)

机构地区：[1]安徽科技学院化学与材料工程学院,安徽凤阳233100

出　　处：《安徽科技学院学报》2020年第6期83-87,共5页Journal of Anhui Science and Technology University

基　　金：安徽省省级大学生创新创业训练计划项目(S201910879302)。

摘　　要：目的:以银杏叶纤维为模板,通过化学沉淀法制备出比表面积较高的TiO_(2),并将磷酸银沉积负载到样品TiO_(2)上提高其催化性能。方法:以钛酸丁酯为钛源,在银杏叶纤维上沉淀出TiO_(2)晶体颗粒;以原料AgNO_(3)、Na_(3)PO_(4)和TiO_(2)制备系列Ag_(3)PO_(4)/TiO_(2)样品。通过X射线衍射(XRD)、N_(2)吸附-脱附等手段表征样品的结构,并以降解亚甲基蓝为探针反应,考察样品的光催化活性。结果:XRD显示,随着Ag_(3)PO_(4)负载量的增加,Ag_(3)PO_(4)的特征衍射峰越来越明显,TiO_(2)的特征衍射峰变弱。N_(2)吸附-脱附显示,随着磷酸银用量的增加,样品的比表面积减小。当Ag_(3)PO_(4)与TiO_(2)物质的量之比是2∶10时,0.02 g催化剂15 min可将100 mL 10 mg/L亚甲基蓝降解88.1%。结论:负载适宜用量的Ag_(3)PO_(4)可有效提高TiO_(2)的光催化性能。Objective:Using ginkgo leaves as a biological template,TiO_(2)was synthesized by precipitation method,and silver phosphate was deposited onto the sample TiO_(2).Methods:Using ginkgo leaves as template and butyl titanate as titanium source,TiO_(2)crystal particles were deposited on ginkgo biloba leaves.A series of Ag_(3)PO_(4)/TiO_(2)samples were prepared by adjusting the molar ratio of AgNO_(3),Na_(3)PO_(4)and TiO_(2).The structure of the samples was characterized by X-ray diffraction(XRD)and N_(2)adsorption desorption.The photocatalytic activity of the samples was investigated by degradation of methylene blue as a probe reaction.Results:XRD showed that the intensity of the characteristic diffraction peaks of Ag_(3)PO_(4)increased with the increase of Ag_(3)PO_(4)loading.The characteristic diffraction peak of TiO_(2)gradually decreased.N_(2)adsorption desorption showed that the specific surface area decreased with the increase of silver phosphate.When the mole ratio of Ag_(3)PO_(4)/TiO_(2)is 2∶10,the catalyst of 0.020 g degraded 10 mg/L methylene blue of 100 mL to 88.1%in 15 minutes.Conclusion:Photocatalytic performance of TiO_(2)can be effectively improved with the optimum amount of Ag_(3)PO_(4).

关 键 词：沉淀法 银杏叶 亚甲基蓝 钛酸丁酯 

分 类 号：TQ134.11[化学工程—无机化工] TQ032.41