高活性类Fenton铜钴双金属催化剂的制备与性能研究

Preparation of High Activity Fenton Copper-Cobalt Bimetallic Catalysts and Its Properties

采用水热合成法制备具有高催化活性的纳米铜钴双金属氧化物(NCCO),并采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)、傅里叶变换红外光谱仪(FTIR)、比表面与孔隙度分析仪(BET)等方法对其进行表征。通过改变制备条件,研究了NCCO在不同的前驱物用量配比、水热时间、水热温度以及有无超声预处理、有无丙醛添加等条件下的合成情况,并以硝基苯(NB)的降解效果为评价指标,确定NCCO的最佳制备条件。结果表明,在前驱物用量配比Cu∶Co为1∶1、水热时间为48 h、水热温度为200℃、超声预处理、添加丙醛的条件下,制得的NCCO具有最优的催化活性。此外,NCCO即使在连续使用4次后,45 min内对NB的降解率依然为100%,表明其具有优异的化学稳定性。

The nano copper-cobalt bimetallic oxide( NCCO) with high catalytic activity was prepared by hydrothermal synthesis method,and it was characterized by SEM,TEM,XRD,XPS,FTIR and BET methods. By changing the preparation conditions,the synthesis of NCCO under the conditions of different dosage ratio of precursor,hydrothermal time,hydrothermal temperature,presence or absence of ultrasonic pretreatment,and presence or absence of propionaldehyde addition were explored,and the degradation effect of nitrobenzene( NB) was used as evaluation index to determine the best preparation condition of NCCO. When the precursor dosage ratio Cu ∶ Co was 1 ∶ 1,hydrothermal time was 48 h and hydrothermal temperature was 200 ℃ with ultrasonic pretreatment and the addition of propionaldehyde,the synthesized NCCO had the best catalytic activity. In addition,NB degradation efficiency was still100% within 45 min even after using NCCO for four consecutive times,indicating that NCCO had excellent chemical stability.