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以钛酸丁酯为钛源,尿素为氮源,活性碳纤维毡(ACFT)为基体,采用溶胶-凝胶法制备碳纤维基N-TiO2光催化复合材料(N-TiO2-ACFT),利用X射线衍射仪、扫描电镜、紫外-可见漫反射仪、比表面积和孔径分布测定仪等考察了负载工艺、煅烧温度对复合材料结构和性能的影响。以弱酸性染液为目标降解物,研究了复合材料的可见光催化性能。结果表明,氮气气氛下500℃煅烧4 h,碳纤维基表面沉积的锐钛矿N-TiO2颗粒尺寸为10~50 nm,N-TiO2谱响应范围红移至可见光区,禁带宽度为2.06 eV,可见光照射下180 min,3次循环使用的N-TiO2-ACFT复合材料对100 mL弱酸性染液的光催化降解率达98.5%。
N-TiO2-ACFT was prepared by sol-gel method using butyl titanate as titanium source, urea as nitrogen source and activated carbon fiber mat (ACFT) as substrate. X-ray diffraction Diffractometer, scanning electron microscopy, UV-Vis diffuse reflectometer, specific surface area and pore size distribution analyzer were used to investigate the effects of loading process and calcination temperature on the structure and properties of the composites. The weak acid bath as the target degradation products, the visible light catalytic properties of composite materials. The results show that the particle size of anatase N-TiO2 deposited on the surface of carbon fiber is 10 ~ 50 nm and the redistribution of N-TiO2 spectrum shifts to visible light with the band gap of 2.06 eV, The photocatalytic degradation rate of 100 mL weak acid solution was 98.5% after 180 min irradiation and 3 cycles of N-TiO2-ACFT composite under visible light irradiation.