蝶翅状Ag/TiO_2 NTs的制备及气相光催化性能研究  

Study of butterfly-wing shaped Ag/TiO_2 NTs and gas phase photocatalytic activity

作　　者：吴红军[1] 高杨[1] 王洋[1] 袁祾祎 肖同欣 王宝辉[1] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]大庆油田有限责任公司第六采油厂,黑龙江大庆163000

出　　处：《东北石油大学学报》2014年第4期80-85,10-11,共6页Journal of Northeast Petroleum University

基　　金：黑龙江省高校新世纪优秀人才项目(1253-NCET004)

摘　　要：采用二次氧化法制备蝶翅状阵列式二氧化钛纳米管(TiO2NTs),通过光化学还原不同浓度Ag+,在其表面均匀负载Ag纳米颗粒(Ag/TiO2NTs).利用扫描电镜(SEM)、能谱分析仪(EDS)、X线衍射仪(XRD)和紫外漫反射(UV-DRS)等对纳米管的形貌、元素组成、晶型和紫外—可见漫反射吸收光谱进行表征,利用傅里叶红外光谱仪(FTIR)测试TiO2NTs和Ag/TiO2NTs对气相甲醇的紫外光催化降解性能.结果表明,Ag/TiO2NTs(0.01mol/L)在紫外光区表现出较好的吸收性能,肖特基结的形成使其光催化活性比纯TiO2NTs有显著提高.In this paper,butterfly-wing shaped hierarchical TiO2 nanotube arrays(TiO2 NTs)coated with Ag nanoparticles were manufactured as a higher photocatalytic activity catalyst toward evaporated methanol.These NTs were prepared by an in-situ two-step anodization method and modified with Ag by means of photoreduction process(Ag/TiO2NTs).SEM,EDS,XRD and UV-DRS were respectively u-tilized to analyze and characterize the morphology,elementary composition,crystalline phase and UVVis Spectra of the TiO2 NTs and Ag/TiO2 NTs.Meanwhile,the gas phase photocatalytic activities of TiO2 NTs and Ag/TiO2 NTs were estimated via decomposition of evaporated methanol and the oxidation products of methanol were measured by FTIR.The results showed that TiO2 NTs crystal structure never changed after Ag decoration.Also,Ag/TiO2NTs(0.01mol/L)revealed the greatest absorption performance in the ultraviolet region and the most remarkable photocatalytic activity because of Schottkyjunction formation.

关 键 词：TIO2纳米管 光沉积 AG纳米颗粒 气相降解 

分 类 号：TQ34[化学工程—化纤工业] TE646[石油与天然气工程—油气加工工程]