多孔碳负载Cu2O/Cu双相催化剂的制备及应用

Preparation and Application of Porous Carbon-supported Cu2O/Cu Dual-phase Catalyst

以硝酸铜和均苯三甲酸为原料,采用溶剂热合成法制备了金属有机框架材料（Cu-BTC）,将其在氮气和空气气氛下焙烧制备了多孔碳负载的Cu2O/Cu催化剂Cu-BTC-1和Cu-BTC-2,并考察了其在对硝基苯酚催化还原中的催化性能。对Cu-BTC-1和Cu-BTC-2进行了XRD,SEM,TEM和BET表征。XRD表征结果表明：在氮气气氛中焙烧Cu-BTC可得到多孔碳负载的Cu2O/Cu双相纳米晶材料。SEM和TEM结果表明：相对于Cu-BTC-2催化剂,Cu-BTC-1双相粒子粒径较小,介于10-30 nm之间,比表面积较高,达200 m^2/g。对硝基苯酚催化还原实验结果表明：与Cu-BTC-2（表观速率系数kapp=0.0067s^–1）相比,Cu-BTC-1在对硝基苯酚的还原中具有更高的催化活性（kapp=0.0108 s^-1）。

Cu-BTC metal organic frameworks were prepared by solvothermal method using copper nitrate and trimesic acid as raw materials. Then,porous carbon-supported Cu2O/Cu dual phase catalyst（Cu-BTC-1） and Cu-BTC-2,can be obtained by calcining Cu-BTC precursor under nitrogen and air atmosphere,respectively. Meanwhile,the catalytic performance of Cu-BTC-1 and Cu-BTC-2 in p-nitrophenol reduction were investigated. XRD measurement indicated that porous carbon supported Cu2O/Cu dual phase nanocrystals（Cu-BTC-1） could be obtained by calcinating Cu-BTC precursor in nitrogen atmosphere. SEM and TEM images showed that Cu-BTC-1 exhibits smaller crystal particles ranging from 10 to 30 nm and higher specific surface area up to 200 m^2/g compared with Cu-BTC-2 sample. The experimental results on p-nitrophenol catalytic reduction indicated that Cu-BTC-1 catalyst possesses much higher catalytic activity（kapp= 0.0108 s^-1） compared with the Cu-BTC-2（kapp=0.0067 s^-1）.