Co/Fe催化硼氢化钠还原水中对硝基苯酚

Co/Fe-Catalyzed Reduction of 4-Nitrophenol with Sodium Borohydride in Water

以FeSO 4·7H 2O、Co(NO 3)2·6H 2O和乙二醇为主要原料,采用水热法制备Co/Fe催化剂,通过XRD、FTIR、BET等检测手段对其结构进行表征,并考察了Co/Fe催化剂催化硼氢化钠还原水中对硝基苯酚的活性。结果表明,Co/Fe催化剂以CoFe 2O 4形式存在,其催化活性随钴含量的增加逐渐增强,催化反应过程符合准一级反应动力学方程;在Co/Fe-1/2(钴铁物质的量比为1∶2)催化剂用量为0.0200 g、硼氢化钠用量为2.0 mL时,催化反应速率最大,反应速率常数为0.3592 min-1,催化效果最好。

Using FeSO4·7 H2O,Co(NO3)2·6 H2O,and ethylene glycol as main materials,we prepared Co/Fe catalysts by a hydrothermal method,characterized their structures by XRD,FTIR,and BET,and investigated their catalytic activities of reduction of 4-nitrophenol with sodium borohydride in water.The results show that Co/Fe catalysts exist in the form of CoFe2O4,and the catalytic activity increases with the increase of cobalt content.Moreover,the catalytic reaction process is in accordance with the pseudo-first-order kinetic equation.Furthermore,the catalytic reaction rate is the largest and the catalytic efficiency is the best with the reaction rate constant of 0.359 2 min-1 under the conditions as follows:the Co/Fe-1/2 catalyst(the molar ratio of Co to Fe is 1∶2) amount is 0.020 0 g,and the sodium borohydride amount is 2.0 mL.