CuTSPc/SnO_2纳米介孔复合材料的合成及其可见光光催化活性

Preparation of Nanosized Mesoporous CuTSPc/SnO_2 and Its Photocatalytic Activity under Visible Light Irradiation

采用无模板水热法,以四磺基酞菁铜(CuTSPc)敏化SnO2制备了CuTSPc/SnO2纳米介孔复合材料,通过X射线衍射、透射电镜、氮气吸附-脱附、紫外-可见光谱和傅里叶变换红外光谱等对复合材料进行了表征,并以罗丹明B(RhB)为目标降解物考察了其低功率(15W光源)可见光光催化活性及循环使用性.结果表明,CuTSPc周环的磺基与SnO2表面的锡离子形成双齿螯合,0.1mol%(CuTSPc与SnO2物质的量比)CuTSPc/SnO2复合材料的比表面积和平均孔径分别为236m2/g和2.6nm,反应180min时可见光降解率高达87%,循环使用率较高(87%±5%).

Copper tetrasulfonated phthalocyanine （CuTSPc）-sensitized mesoporous SnO2, namely CuTSPc/SnO2, was prepared by a simple template-free hydrothermal method. X-ray diffraction, transmission electron microscopy, N2 adsorption-desorption, Fourier transform infrared spectroscopy, and UV-Vis spectroscopy were used to characterize the samples. The photocatalytic activity and circulating degradation rate of the photocatalysts under low-power visible light （15 W） were determined using rhodamine B （RhB） as the objective decomposition substance. It was found that the sulfonated groups of CuTSPc are bonded to the tin ion in a chelating bidentate mode in CuTSPc/SnO2, and the specific surface area and pore size for 0.1 mol% CuTSPc/SnO2 are 236 m^2/g and 2.6 nm, respectively. The degradation rate of RhB with 0.1 mol% CuTSPc/SnO2 is up to 87 % during 180 min of reaction.