Ag核SiO_2@TiO_2空心微球的制备与性能研究  

Preparation and Properties of Ag Core SiO_2@TiO_2 Hollow Microspheres

作　　者：王恩华 刘素文 刘艳[1] 陈明辉 谷传峰 马学美 马迎迎 白鸽 曹培[1] 

机构地区：[1]齐鲁工业大学实验管理中心,山东济南250353

出　　处：《山东化工》2017年第20期29-32,共4页Shandong Chemical Industry

摘　　要：采用一步法水热还原AgNO_3制备出Ag@C核壳结构,并利用其作为模板沉积包覆上SiO_2、TiO_2层,煅烧后制备出载Ag的SiO_2@TiO_2空心球材料。利用XRD、TEM、SEM以及UV-Vis光谱对制备的样品进行表征,并研究了紫外光下对亚甲基蓝溶液的光催化降解性能。结果表明,制备的Ag核SiO_2@TiO_2空心球材料Ag核尺寸为80nm,空心夹层直径在250nm左右,这样的结构可以有效增大比表面积,而且Ag的表面等离子共振可以有效增强样品在紫外区域的吸收,使其对亚甲基蓝的光催化活性得到明显提高,120min内可达84%。Ag@ C core shell structure was prepared by one step hydrothermal reduction of AgNO3. Then the core shell structure was used as template and deposited on SiO2 and TiO2 layers to prepare the Ag core SiO2@ TiO2 hollow microspheres materials.The samples were characterized by XRD,TEM,SEM and UV-Vis spectra. The photocatalytic degradation properties were investigated using methylene blue solution under UV light. The results show that the size of Ag core is 80 nm,and the diameter of hollow sandwich is about 250 nm. This structure can effectively improve the specific surface area of the sample. Due to the surface plasmon resonance effect of Ag,the absorption of the sample in the UV region can be enhanced. Therefore,the photocatalytic activity of methylene blue is obviously improved,and 120 min can be up to 84%.

关 键 词：Ag核 空心球 TIO2 光催化 

分 类 号：TB383[一般工业技术—材料科学与工程]