N,α-Fe_2O_3共掺杂TiO_2纳米管阵列的制备及其光电催化还原CO_2性能研究

Study on preparation of N,α-Fe_2O_3 co-doped TiO_2 NTs and their photocatalysis of CO_2 reduction

采用二次氧化法制得二氧化钛(TiO_2)纳米管(NTs)阵列(TiO_2NTs),并采用氮(N)、铁(Fe)对其进行改性,制得N、氧化铁共掺杂TiO_2NTs阵列(N-Fe_2O_3N/TiO_2NTs),并对N-Fe_2O_3N/TiO_2NTs的化学组成、结构和催化性能进行测试。研究结果表明,在0.075mol/L浸渍浓度条件下制得的N-Fe_2O_3N/TiO_2NTs有最优的光吸收能力,其在500nm的最高吸光度1.5Abs;主要还原产物一氧化碳(CO)产率最高可达140×10-6/(cm^2·h),比纯TiO_2NTs的产率提高了约8倍,光电流效率达到87.45%。

Titanium dioxide(TiO2)nanotube(NTs)array(TiO2 NTs)was prepared by the secondary oxidation method,and modified by nitrogen(N)and iron(Fe)to prepare N-Fe2O3/TiO2 NTs array(N-Fe2O3/TiO2 NTs).The chemical composition,structure and catalytic performance of N-Fe2O3/TiO2 NTs were tested.The results showed that N-Fe2O3/TiO2 NTs had the optimal light absorption capacity under the condition of 0.075 mol/L immersion concentration,and its maximum absorbance at 500 nm was 1.5 abs.The yield of carbon monoxide(CO),the main reduction product,was up to 140×10^-6/(cm^2·h),about 8 times higher than that of pure TiO2 NTs,and the photocurrent efficiency reached 87.45%.