分子印迹型TiO_(2)/g-C3N4的制备及其对孔雀石绿光催化降解性能研究

Preparation of molecularly imprinted TiO/g-C_(3)N_(4) and study on photocatalytic degradation property of malachite green

以三聚氰胺、三聚氰酸和TiO_(2)为前驱体,制备了TiO_(2)/g-C_(3)N_(4)复合材料,再以孔雀石绿为模板分子,通过溶胶-凝胶法制得分子印迹型TiO_(2)/g-C_(3)N_(4)光催化材料(MIP-TiO_(2)/g-C_(3)N_(4))。利用傅里叶红外光谱(FTIR)、X-射线衍射(XRD)和扫描电子显微镜(SEM)等方法对MIP-TiO_(2)/g-C_(3)N_(4)的结构和形貌进行了表征。通过吸附和降解实验研究了MIP-TiO_(2)/g-C_(3)N_(4)的吸附性能和光催化性能。结果表明,该材料能够有效降低高浓度共存物质的干扰,实现选择性的富集并降解孔雀石绿,在140 min内对孔雀石绿的降解率可达93.7%。

The molecular imprinted TiO2/g-C_(3)N_(4)(MIP-TiO2/g-C_(3)N_(4))photocatalytic material was prepared by sol-gel method,using melamine,cyanuric acid and TiO2 as precursors,malachite green as template molecule.The structure and morphology of MIP-TiO2/g-C_(3)N_(4) were characterized by Fourier transform infrared spectrum(FTIR),X-ray diffraction(XRD)and scanning electron microscopy(SEM).The adsorption and photocatalytic performance of MIP-TiO2/g-C_(3)N_(4) were studied through adsorption and degradation experiments.As a result,the prepared MIP-TiO2/g-C_(3)N_(4) can effectively reduce the interference of high concentration co-existing substances,achieve selective enrichment.Tthe degradation rate of malachite green could reach 93.7%after being irradiated by ultraviolet for 140 min.