The composite thin film of TiO 2/CTAB was prepared on quartz substrate by using super-molecular self-assembly method. The structure of the thin film was characterized by means of X-ray diffraction and UV-Vis absorptio...The composite thin film of TiO 2/CTAB was prepared on quartz substrate by using super-molecular self-assembly method. The structure of the thin film was characterized by means of X-ray diffraction and UV-Vis absorption spectrum. The results of UV-Vis absorption spectrum indicate that the diameter of the TiO 2 nanoparticles is 2 nm. The results of X-ray diffraction indicate that the thin film is composed of organic and inorganic layers in alternately orderly arrangement. The distance between the organic layer and inorganic layer is 4.61 nm. The thicknesses of organic layer and inorganic layer are 2.58 and 2 nm, respectively.展开更多
为了提高凹凸棒石(ATP)的吸附性能,选用表面活性剂十六烷基三甲基溴化铵(CTAB)对ATP进行了改性,利用FT-IR和BET表征了改性前后的结构。通过正交试验探究了其吸附腐殖酸(HA)的较佳方案,并对吸附动力学模型进行分析。结果表明:正交试验中...为了提高凹凸棒石(ATP)的吸附性能,选用表面活性剂十六烷基三甲基溴化铵(CTAB)对ATP进行了改性,利用FT-IR和BET表征了改性前后的结构。通过正交试验探究了其吸附腐殖酸(HA)的较佳方案,并对吸附动力学模型进行分析。结果表明:正交试验中最优的方案为:pH值为6.5,在60℃下吸附10 min,体系中投加0.1 g ATP-CTAB,HA的吸附率为99.82%。ATP-CTAB吸附HA的影响因素顺序为:HA的初始浓度>ATP-CTAB投加量>温度>pH值>反应时间。吸附动力学结果表明,吸附拟合度△q_e<3.4%,R^2>0.996,过程遵循伪二级吸附动力学模型,吸附过程以化学吸附为主。展开更多
文摘The composite thin film of TiO 2/CTAB was prepared on quartz substrate by using super-molecular self-assembly method. The structure of the thin film was characterized by means of X-ray diffraction and UV-Vis absorption spectrum. The results of UV-Vis absorption spectrum indicate that the diameter of the TiO 2 nanoparticles is 2 nm. The results of X-ray diffraction indicate that the thin film is composed of organic and inorganic layers in alternately orderly arrangement. The distance between the organic layer and inorganic layer is 4.61 nm. The thicknesses of organic layer and inorganic layer are 2.58 and 2 nm, respectively.
文摘为了提高凹凸棒石(ATP)的吸附性能,选用表面活性剂十六烷基三甲基溴化铵(CTAB)对ATP进行了改性,利用FT-IR和BET表征了改性前后的结构。通过正交试验探究了其吸附腐殖酸(HA)的较佳方案,并对吸附动力学模型进行分析。结果表明:正交试验中最优的方案为:pH值为6.5,在60℃下吸附10 min,体系中投加0.1 g ATP-CTAB,HA的吸附率为99.82%。ATP-CTAB吸附HA的影响因素顺序为:HA的初始浓度>ATP-CTAB投加量>温度>pH值>反应时间。吸附动力学结果表明,吸附拟合度△q_e<3.4%,R^2>0.996,过程遵循伪二级吸附动力学模型,吸附过程以化学吸附为主。
