Sn^(2+)掺杂TiO_2/Cu复合粒子的制备及可见光催化性能  

The Preparation of Sn^(2+) Doped TiO_2/Cu Composite Particles and the Nature of its Visible Light Catalysis

作　　者：王彬[1] 闫军[1] 崔海萍[1] 杜仕国[1] 

机构地区：[1]军械工程学院,河北石家庄050003

出　　处：《稀有金属材料与工程》2009年第A01期468-471,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50842054);军械工程学院院基金(YJJXM08023)

摘　　要：以钛酸丁酯为原料,利用胶溶-回流法在室温下制备具有可见光活性的Sn2+掺杂纳米TiO2/Cu复合粒子。FE-SEM观察表明,TiO2颗粒覆盖在铜粉表面形成纳米/微米复合结构。利用XPS确定复合粒子的表面元素状态,据此分析了Sn2+掺杂抑制TiO2晶粒长大的原因。UV-Vis吸收光谱分析表明,负载金属Cu后使半导体的吸收限明显红移,除紫外区的吸收之外,TiO2/Cu复合粒子在可见光区吸收带出现了522.5nm突跃波长。以甲基橙为模型化合物的降解实验显示出所制粉体良好的可见光活性。Using butyl titanate as the main material, the TiO2/Cu composite particle doped by Sn^2＋ at room temperature was prepared. The composite particle holds the visible light catalysis nature. FE-SEM observation indicates that TiO2 particles cover the copper powder surface and form nanometer/micron structure. XPS results determines the surface element state of the composite particles, based on which the reason of Sn^2＋ doping suppressing the＇growth of TiO2 crystalline was analyzed. UV-Vis indicates that the absorption limit of the semiconductor obviously make red shift effect after loading metal Cu. Besides the absorption in the ultraviolet district, the jump wavelength of 522.5 nm of composite particles appears in the visible light district. The degradation experiment taking methyl orange demonstrates the excellent visible light activation of the obtained powder.

关 键 词：TIO2 Cu复合粒子 可见光 光催化活性 

分 类 号：O643.36[理学—物理化学] O614.411[理学—化学]