摘要
通过将水热法制备的钛酸盐纳米管,质子化得到氢基钛酸盐纳米管(H-TNTs)后,利用离子交换法,在碱性条件下,制备出银沉积二氧化钛纳米结构(Ag@TiO2)。采用XRD、TEM、XPS、DRS等手段对不同工艺下制备的Ag@TiO2的形貌、结构、组成和光学性能进行了表征,并以甲基橙为目标降解物,研究了其光催化活性。研究发现,利用离子交换的方法,可以将银以单质银的形式均匀沉积在二氧化钛纳米结构中,随着煅烧温度的升高,Ag@TiO2光催化剂的形貌由管状结构转变成棒状结构,在长度不断减小的同时,直径不断增大,同时结晶度逐步提高。550℃煅烧的Ag@TiO2的光催化活性最好,以其为光催化剂,60 mL 20 mg·L-1的甲基橙在1.5 h时降解完全。
After the protonation of titanate nanotubes prepared by hydrothermal method,silver deposited nano-titanium dioxide（ Ag@ TiO2） was prepared via ion-exchange process in alkaline environment.The morphology,structure,composition and optical properties of Ag@ TiO2 prepared at different conditions were characterized by XRD,TEM,XPS and DRS,and the photocatalytic properties of Ag@ TiO2 were evaluated using Methyl orange.The results show that the silver was uniform deposited on the TiO2 nanostructures in the form of metallic silve.As the calcination temperature increasing,the morphology of Ag@ TiO2 transforms from nano-tube into nano-club,while the crystallization was improved.The photocatalytic properties reached a peak when the samples were calcinated at 550 ℃,as the MO of 60 mL 20 mg·L^-1 was degraded completely in 1.5 h.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2014年第9期2171-2177,共7页
Journal of Synthetic Crystals
基金
国家自然科学基金(51372234)
关键词
水热法
离子交换
二氧化钛
光催化
hydrothermal method
ion-exchange
titanium dioxide
photocatalysis
