摘要
采用水热法合成了球形羟基磷酸铜,以罗丹明B为模拟有机污染物,研究了碳酸氢钠与羟基磷酸铜的协同催化作用,以及碳酸氢钠浓度、温度、催化剂用量、过氧化氢浓度和染料浓度对降解的影响,采用XRD、FTIR和SEM表征了反应前后催化剂的结构和形貌。结果表明,加入一定浓度的碳酸氢钠能明显提高体系的催化活性。羟基磷酸铜活化过氧化氢产生羟基自由基,并进一步与碳酸氢根等作用生成超氧自由基,是降解染料的两种主要活性物种。碳酸氢钠的弱碱性也有利于提高羟基磷酸铜的催化活性,并显著降低了铜沥出,提高了催化剂的稳定性。使用前后羟基磷酸铜没有明显变化。
Spherical copper hydroxyphosphate was synthesized by hydrothermal method.The synergistic catalysis of sodium bicarbonate and copper hydroxyphosphate was studied using Rhodamine B as a simulated organic pollutant.The effects of sodium bicarbonate concentration,temperature,catalyst dosage,hydrogen peroxide concentration,and dye concentration on the degradation were also studied.The structure and morphology of the catalyst before and after the reaction were characterized by XRD,FTIR,and SEM.The results show that the catalytic activity of the reaction system can be significantly improved by adding a certain concentration of sodium bicarbonate.Copper hydroxyphosphate activates hydrogen peroxide to produce hydroxyl radicals,and further reacts with bicarbonate to produce superoxide radicals,which are the two main active species for dye degradation.The weak alkalinity of sodium bicarbonate is also conducive to improving the catalytic activity of copper hydroxyphosphate,significantly reducing copper leaching and improving the stability of the catalyst.Copper hydroxyphosphate did not change significantly before and after use.
作者
朱广绪
古桃
卢天亮
韩丽
詹予忠
ZHU Guang-xu;GU Tao;LU Tian-liang;HAN Li;ZHAN Yu-zhong(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第7期1593-1596,1604,共5页
Applied Chemical Industry
基金
国家自然科学基金资助项目(U1204215)。
关键词
多相类芬顿过程
羟基自由基
过氧化氢活化
碳酸氢盐
羟基磷酸铜
heterogeneous Fenton-like process
hydroxyl radical
activation of hydrogen peroxide
bicarbonate
copper hydroxyphosphate
