摘要
采用溶胶-凝胶法(Sol-gol)制备了P、V共掺杂的纳米TiO2光催化材料,借助XRD、紫外-可见光谱仪对制备的光催化材料进行表征,并通过晶粒尺寸、晶相结构和吸收光谱等分析,研究了P、V共掺杂对TiO2性能的影响。研究结果表明:P、V共掺杂抑制了TiO2由锐钛矿向金红石的转变,明显延缓了TiO2相的转移;P、V双掺杂可明显减小晶粒尺寸,增大催化剂的比表面积,无论掺杂与否,随着煅烧温度的升高,TiO2晶粒的尺寸变大,比表面积减小。从紫外-可见光谱图上发现,P/V共掺杂TiO2样品与其余样品相比,红移效果最明显,对可见光吸收能力最强。
A nanosized TiO2 photocatalyst co-doped with P,V was synthesized by the soPgol method. The prepared samples were characterized by XRD and Uv-Vis. The grain size, crystalline phase structure and ultraviolet-visible spec- trum for the samples were analyzed and the effect of P, V co-doped in TiO2 was studied. The result showed that the change from anatase to rutile transformation with temperature was inhibited by P, V co-doped and phase transfer of TiO2 was significantly delayed. By P and V co-doping, the grain size was clearly reduced,and the surface area of photocatalyst was clearly increased. Regardless of doping or not, as the calcination temperature was increased the grain size of TiO2 was increased and the surface area was reduced. In addition, the ultraviole-visible spectrum showed that the red shit effect and absorption ability to visible light of P, V co-doped TiO2 were better than single P and V-doped TiO2 simples.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2014年第2期16-20,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金青年项目(61306067)
黄冈师范学院科学研究重点项目(2013017203)
