MIL-101/P25复合材料的制备及光催化性能  

Preparation and Photocatalytic Properties of MIL-101/P25 Composites

作　　者：陈琪[1] 费霞[1] 何琴琴[1] 吕盟盟[1] 武其亮[1] 刘雪霆[1] 何兵[1] 

机构地区：[1]合肥工业大学化学工程学院,可控化学与材料化工安徽省重点实验室,合肥230009

出　　处：《无机化学学报》2014年第5期993-1000,共8页Chinese Journal of Inorganic Chemistry

基　　金：安徽高校省级自然科学研究重点资助项目(No.KJ2010A271)

摘　　要：采用水热法,将MIL-101负载到预处理过的P25表面,制得MIL-101/P25复合光催化材料,通过X射线衍射(XRD)、傅里叶变换红外(FTIR)、低温N2物理吸附-脱附(BET)、热重(TG)、场发射透射电镜(FETEM)和光致发光光谱(PL)等对催化剂进行结构表征,同时考察MIL-101及复合材料的稳定性,并且提出协同因子指标来定量评价复合带来的协同效应。结果表明MIL-101呈片状,与P25部分结合。复合后,MIL-101的稳定性得到提高。在适当的配比下,复合具有协同效应,当Cr(NO3)3·9H2O与P25的物质的量之比为1∶1时,复合材料对罗丹明B的可见光催化活性最高,协同因子达到1.64。复合材料对无色有机污染物水杨酸同样表现出良好的光催化效果。Via hydrothermal method, MIL-101 was loaded on to the pretreated P25 to obtain MIL-101/P25 composites that were structurally characterized using X-ray diffraction （XRD）, fourier transform infrared spectroscopy （FTIR）, N2 adsorption-desorption （BET）, thermogravimetry （TO, field emission transmission electron microscopy （FETEM） and photoluminescenee （PL）, meanwhile, the stability of MIL-101 and the composites was investigated, and the synergistic effect induced by compounding was quantitatively evaluated by the proposed synergistic factor. The results show that MIL-101 has sheet-like morphology, and a portion of it combined with P25. After compounding, the stability of MIL-101 is promoted. Compounding can bring the synergistic effect at the appropriate ratio, and when the molar ratio of Cr（NO3）3.9H2O to P25 is 1：1, the composite exhibits the highest activity for the visible light photocatalytic degradation of rhodamine B, and the synergistic factor is 1.64. The composite also exhibits high photocatalytic activity for the degradation of colorless organic pollutant salieylie acid.

关 键 词：MIL-101 光催化 P25 复合 协同效应 

分 类 号：O614.411[理学—无机化学] O614.611[理学—化学]