水热法制备CdSe和PbSe共负载TiO2纳米带复合材料

Hydrothermal preparation of CdSe and PbSe co-deposited TiO2 nanobelts

摘要:

采用简单的两步水热制备过程制得了CdSe或/和PbSe负载的TiO2纳米带复合材料。使用XRD、SEM、TEM、UV-Vis吸收和FTIR等测试技术对产物进行了一系列表征。结果表明，六方相CdSe粒子或/和立方相PbSe粒子直接负载在四方相锐钛矿型TiO2纳米带表面，在粒子和纳米带间没有任何有机连接物，其中呈近球形的CdSe粒径主要处在100-400 nm，而呈近立方体形的PbSe边长主要处在300-1000 nm。CdSe和PbSe共同负载的TiO2纳米带复合材料在可见光大部分区域有很强的光吸收。由FTIR谱图推断出在复合材料里的TiO2纳米带结构中掺杂有少量Cd2 或/和Pb2 离子。

Abstract:

CdSe or/and PbSe deposited TiO2 nanobelts were prepared using two-step hydrothermal preparation process. Various techniques including XRD, SEM, TEM, UV-Vis absorption and FTIR measurements were used to characterize a series of products. The results show that hexagonal CdSe particles with sphere-like or/and cubic PbSe particles with cube-like deposit on the surface of anatase TiO2 nanobelts, and the CdSe or PbSe particles are mainly with size in a wide range of 100-400 nm or 300-1000 nm, respectively. There is not any organic connection between particles and nanobelts. CdSe and PbSe co-deposited TiO2 nanobelts exihibit very strong absorption in visible-light main region. A fact that a little bit Cd2 or/and Pb2 ions have doped into TiO2 nanobelts for the composite products has been inferred by FTIR measurements.