摘要
利用液相化学还原法和溶胶-凝胶法同步进行的方法,制备得到不同形貌的银颗粒及银颗粒负载的TiO_2复合材料。银的负载提高了TiO_2的光吸收性能,但对TiO_2的晶体结构影响不大,TiO_2仍然保持锐钛矿相结构;XPS结果显示,负载的银主要以零价态形式存在于TiO_2的表面。在紫外光照下,对染料罗丹明B和亚甲基兰进行光催化降解性能测试,结果表明,负载银后,TiO_2的光催化活性明显提高。其中,球形银负载的Ag@TiO_2复合催化剂活性最好。
TiO2 loaded Ag with different patterns was prepared by liquid chemical reduction combined with sol-gel methods. The results show that TiO2 loaded with global Ag（Ag@ TiO2 ） displays a better photo-absorption capability comparing with the untreated sample, but has no effect on its crystal structure. The zero chemical state of Ag@TiO2 was detected in the swface of TiO2 by XPS. The photocatalytic activity of the Ag@ TiO2 was determned by the photocatalytie oxidation of rhodamine B and methylene blue under UV-light irradiation. TiO2 loaded with global Ag shows the highest photocatalytic activity.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第10期1269-1274,共6页
Acta Energiae Solaris Sinica
基金
河南省教育厅自然科学基金(2007430008)
关键词
液相化学还原法
溶胶.凝胶法
银
二氧化钛
光催化
染料
iquid chemical redution process
sol-gel process
silver loaded
titanium dioxide
photocatalytic
dye
