载钴催化剂的制备及对染料降解

Synthesis of graphene-cobalt hydroxide and its performance in degradation of dye

以氧化石墨和六水合硝酸钴为前驱体用水热法制备出了不同的催化剂。通过透射电镜、红外光谱、热重以及X射线衍射等测试方法对制得的催化剂进行了表征与分析,并通过对酸性橙Ⅱ的催化降解实验确定催化剂的催化性能。通过实验发现,催化剂制备条件为:六水合硝酸钴与氧化石墨质量比为1∶1,肼的质量为氧化石墨的7/10,加热时间为4 h时,降解染料所用的时间最短。在此条件下制出的催化剂可催化单过硫酸氢钾在10 min内将染料色度基本去除。

In this study,graphite oxide and cobalt nitrate were used as the precursors to synthesis series of novel catalyst using hydrothermal method. TEM,TGA,FTIR and XRD were used to investigate the as prepared catalyst. Their catalytic activity was probed by degradation reaction of acid orangeⅡ. The experimental results revealed that the faster removal rate（10 mins） for the degradation of acid orangeⅡ could be achieved under the following conditions,graphite oxide and cobalt nitrate are equal in concentration,the weight of hydrazine is 7 /10 times of the graphite oxide and heating for 4 hours.