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碳纳米管(CNTs)混酸(H2SO4/HNO3,体积比为3:1)超声辅助纯化及氧化植入活性基团-COOH,进一步借助其转化为酰氯基团,分别于CNTs表面共价嫁接亲水性赖氨酸及亲脂性正十八胺基团,赋予赖氨酸表面改性CNTs显著水溶(6.85mg·mL-1)和十八胺表面改性CNTs显著醇溶(10.15mg·mL-1)性能.运用低温水热法以亲水性CNTs复合TiO2,溶胶-凝胶法以亲脂性CNTs复合TiO2,观察到复合催化剂光催化性能随CNTs溶剂分散性能增加而明显提升.运用傅里叶变换红外(FTIR)、激光拉曼、X射线衍射(XRD)、Brunauer-Emmett-Teller低温氮气吸附、透射电镜(TEM)及X光电子能谱(XPS)等手段表征,系统探讨CNTs的表面改性机制及CNTs溶解分散性能与复合催化剂的光活性的关联.认为表面改性CNTs借助Ti-O-C键合促进其与纳米TiO2的异质结合,从而充分利用CNTs的大比表面积及电荷传输性能促进催化剂的污染物光催化降解.
(CNTs) mixed acid (H2SO4 / HNO3, volume ratio of 3: 1) ultrasound-assisted purification and oxidative implantation of the active group -COOH, further by virtue of its conversion to acid chloride groups were covalently grafted on the surface of CNTs hydrophilic Lysine and lipophilic n-octadecylamine groups, the lysine-modified CNTs were significantly water-soluble (6.85 mg · mL-1) and octadecylamine surface-modified CNTs were significantly alcohol-soluble (10.15 mg · mL- ) Performance.Using the low temperature hydrothermal method to hydrophilic CNTs composite TiO2, sol-gel method with lipophilic CNTs composite TiO2, it was observed that the photocatalytic performance of the composite catalyst with the CNTs solvent dispersion performance increased significantly.Using Fourier transform FTIR, laser Raman, X-ray diffraction (XRD), Brunauer-Emmett-Teller cryogenic nitrogen adsorption, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to systematically investigate the surface modification mechanism of CNTs And the dissolution and dispersion properties of CNTs and the photocatalytic activity of the composite catalyst.The surface modification CNTs is considered to promote the heterogeneous binding with the nano-TiO2 by means of Ti-OC bonding so as to fully utilize the large specific surface area and charge transport properties of the CNTs Pollutants Photocatalytic Degradation