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以钛酸丁酯为前驱体,尿素为N源,电气石为载体,采用超声辅助溶胶-凝胶法制备N掺杂纳米TiO_2/电气石复合材料。采用XRD,FT-IR,UV-Vis DRS,SEM,EDS等测试技术对复合材料的结构和性能进行表征。分别考察煅烧温度、掺N量、电气石添加量、催化体系等因素对复合材料光催化性能的影响。结果表明:在煅烧温度为500℃,N掺杂量为5%(摩尔分数),电气石添加量为10%(质量分数),催化剂用量为3g/L,500W紫外灯照射条件下,N掺杂纳米TiO_2/电气石复合材料光催化降解TNT(10mg/L)的效果最佳,且具有良好的再生利用性能。
N-doped nano-TiO 2 / tourmaline composite was prepared by ultrasonic assisted sol-gel method using butyl titanate as precursor, urea as N source and tourmaline as carrier. The structure and properties of the composites were characterized by XRD, FT-IR, UV-Vis DRS, SEM and EDS. The effects of calcination temperature, N content, addition of tourmaline, catalyst system and other factors on the photocatalytic activity of the composites were investigated respectively. The results show that under the conditions of calcination temperature of 500 ℃, N doping amount of 5% (mole fraction), tourmaline addition amount of 10% (mass fraction), catalyst dosage of 3 g / L and irradiation of 500W UV lamp, The photocatalytic degradation of TNT (10 mg / L) by the hybrid nano-TiO 2 / tourmaline composite has the best effect and has good recycling performance.