具有可见光响应的C、N共掺杂TiO2纳米管光催化剂的制备

摘要

为了提高二氧化钛对可见光的利用效率,采用等离子体电解方法对二氧化钛实现了C、N共掺杂.掺杂通过等离子体电解HCONH2、NaNO2、(NH2)2CO产生活性N、C实现.XPS结果表明,C、N掺杂进入了氧化钛晶格.紫外漫反射光谱分析表明,氧化钛对可见光(＞400 nm)的响应增强,其光催化降解能力也大大增强.C、N共掺杂TiO2是一种利用太阳能的理想的光催化剂.%To enhance the absorption in the visible region for TiO2,C and/or N doping of TiO2 nanotube was carried out by a novel method--plasma electrolysis.The doping was achieved with active C and N produced from the plasma electrolysis of HCONH2 NaNO2.or(NH2)2CO.The results of XPS revealed that C and N were successfully doped into the lattice of TiO2.UV-Vis diffuse reflectance spectra showed a shift to longer wavelengths and an enhancement of the absorption in the visible region(＞400 nm)for the C,N-codoped TiO2,compared to the pure TiO2,C-doped TiO2 and N-doped TiO2.The C,N-codoped TiO2 showed the best photocatalytic activities for the degradation of methyl orange under visible light irradiation.and was a promising photocatalyst for utilizing the solar energy.