以钛酸丁酯为 Ti源，六次甲基四胺为 N源，偏钒酸铵为V源，利用溶胶‐凝胶法制备氮钒共掺杂二氧化钛（N‐V‐TiO2）纳米材料。采用XRD、UV‐Vis、BET、XPS等检测手段对N‐V‐TiO2的晶型比例、元素组成等进行分析，研究其在可见光下催化氧化甲醛气体的性能。结果表明，煅烧温度500℃、掺氮28％、掺钒1％的N‐V‐TiO2具有混晶型结构、比表面积大、对可见光吸收强，催化降解甲醛的效率最高可达到916．％，分别比纯TiO2、掺氮TiO2、掺钒TiO2的效率显著提高。N‐V‐TiO2光氧化效率随甲醛初始浓度增大而减小，光催化反应服从一级反应动力学特征，而且包括吸附和光催化氧化反应两部分，其中光催化氧化为速控步骤；重复5次使用的效率仍然高于单独掺杂TiO2。
N‐V‐codoped nanosized TiO2 powders were prepared by the sol‐gel method with tetrabutyl titanate as Ti resource ,hexamethylene tetramine as nitrogen resource and ammonium metavanadate as vanadium resource . N‐V‐TiO2 powders were characterized by XRD , UV‐Vis ,BET and XPS .The photocatalytic decomposition property of N‐V‐TiO2 to formaldehyde under visible light was investigated .The results show that the N‐V‐TiO2 of calcination temperature at 500 ℃ ,the N‐doped amount of 28% ,the V‐doped amount of 1% has the anatase and rutile mix structure ,large specific surface area and strong visible light absorption .The degradation efficien‐cy of formaldehyde was up to 91 6.% ,which was significantly higher than that of TiO2 ,N‐TiO2 and V‐TiO2 re‐spectively .The degradation efficiency of formaldehyde decreased with the increase of its concentration by N‐V‐TiO2 and the photocatalytic reaction was first order and included adsorption and photocatalytic oxidation which was the rate‐controlling step .The degradation efficiency after 5 times reuse by N‐V‐TiO2 was still higher than that of N‐TiO2 and V‐TiO2 .
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