掺氮TiO_2光电极材料制备及光电性能研究

Preparation of Nitrogen-doped TiO_2 photoelectrodes and their photoelectrical properties

以纳米TiO_2粉体为基底,中压氨气为氮源,在高压反应釜内利用氨气的还原性质对TiO_2粉体强制掺氮,通过控制反应釜内温度制备形貌、颗粒均一的N-TiO_2纳米粒子,并探讨掺氮量和光电转化效率之间的关系。实验结果表明:能够有效控制纳米TiO_2氮粉体的氮掺杂,得到不同掺氮量的N-TiO_2。随着焙烧温度在一定范围内的降低N掺杂含量升高,N-TiO_2随着掺氮量的增加,其电池光电转化效率增强。

Nanomaterials are generated using N‐doped TiO2 material with their concentrations by adjusting the amount of NH3 under middle pressure .N‐doped TiO2 particles are characterized under the reaction conditions at different temperatures . Experimental results indicate that the synthesis route we found through this study is an effective way to adjust the relationships between the concentration and the incident photon‐to‐conversion efficiency of the N‐doped TiO2 nanomaterials .It can be concluded that N dopant concentration and photoelectrochemical property of N‐doped TiO2 have been increased after sintered in lower temperatures with anatase phase .