【摘要】 以富含多孔结构的纤维素为诱导体,采用浸渍法制备仿生CeO₂-CuO催化材料,通过X射线衍射（XRD）、场发射扫描电子显微镜（SEM）、透射电子显微镜（TEM）、氮气吸附-脱附（N2adsorption-desorption）、紫外-可见漫反射光谱（UV-vis）等分析手段对产物的结构和形貌进行了表征。在可见光条件下,以亚甲基蓝溶液为模拟废水,测试其TOC（Total organic carbon）去除率,并对光催化降解机理进行探讨。实验结果表明所制备的材料颗粒均匀,平均颗粒尺寸在10nm左右,并且含有丰富的介孔结构,其孔径集中分布于5¹0nm。由紫外-可见漫反射吸收光谱可知,材料对可见光的吸收程度高于块状氧化铈,从而具有更高的可见光催化活性,光照2.5h后对亚甲基蓝的TOC去除率为90%。更多还原

【Abstract】 Biomorphic CuO-CeO₂ catalyzer was prepared by impregnation method using porous fibrous body as inductor,whose structure and morphology was analyzed by XRD,SEM,TEM,N-2adsorption-desorption,and UV-vis spectrometry etc..The catalyzer′s TOC（total organic carbon）removal rateunder visible light was evaluatedby using methylene blue（MB）solution as simulated wastewater,and the photocatalytic mechanism was also discussed.The results showed that the CuO-CeO₂ catalyzer has abundant mesoporous structures（pore diameter 5-10nm）and a relatively small particle size（10nm）.The biomorphic CuO-CeO₂ catalyzer showed higher absorption of visible light compared with bulk CeO₂,which could be excited by visible light irradiation and more active for pollutants catalytic degradation,as TOC removal rate for MB could reach 90% after 2.5hirradiation.更多还原