材料期刊网

以钛酸丁酯为原料，尿素为氮源，采用溶胶-凝胶法将纳米Ti02负载在多壁碳纳米管（MCNTs）表面制备了氮掺杂MCNTs／Ti02光催化复合材料；通过X射线衍射仪、透射电子显微镜等研究了复合材料的晶体结构和形貌，通过紫外可见光（UV-Vis）漫反射谱分析了复合材料的吸光性能，并研究了其在自然光照射条件下对甲基橙的光催化降解性能。结果表明：氮掺杂MCNTs／TiO2复合材料的吸光性能高于纯TiO2的，且前者对甲基橙的光催化效率是后者的2．77倍，前者在一般自然光条件下催化1h后的催化效率可达44．8％。

N-butyl titanate as raw materials, urea as nitrogen source, the nano-TiO2 was loaded in a multi- walled carbon nanotubes (MCNTs) surface, and then to prepare nitrogen-doped MCNTs/TiO2 photocatalytic composite by sol-gel method. The crystal structure and morphology of the composite were studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM), the absorption performance of the composite was studied by UV-visible (UV-Vis) diffuse reflectance spectroscopy, and the photoeatalytic degradation performance of the composite on methyl orange also was studied when the composite exposed to natural light. The results show the absorption performance of the nitrogen-doped MCNTs/TiO2 photocatalytic composite was high than that of the pure TiO2, and the photoeatalytic efficiency was 2. 77 times of the latter, the catalytic efficiency of the former on methyl orange after natural sunlight photocatalytic 1 h could reach 44. 8%.