摘要
为了解决传统制备Co_(3)O_(4)需经高温焙烧,导致比表面积下降,表面氧空位减少,催化活性低问题,考察了不同方法制备的Co_(3)O_(4)催化剂(Co_(3)O_(4)-a、Co_(3)O_(4)-a-200和Co_(3)O_(4)-b)的催化性能。研究表明,将CoCl_(2)·6H_(2)O加入过量的KOH溶液中超声,常温下就可制得具有大比面积、丰富氧空位的Co_(3)O_(4)催化剂(Co_(3)O_(4)-a),对活化过一硫酸盐降解亚甲基蓝显示优异性能。在pH=7.00,催化剂浓度50 mg/L、过一硫酸盐浓度100 mg/L和亚甲基蓝初始浓度15 mg/L的最佳条件下,10 min内MB降解率大于99%。
In order to solve the issue of traditional Co_(3)O_(4)preparation methods by high temperature calcination leading to reduced specific surface area,decreased surface oxygen vacancies and low catalytic activity,the catalytic performance of Co_(3)O_(4)catalysts(Co_(3)O_(4)-a,Co_(3)O_(4)-a-200,and Co_(3)O_(4)-b)prepared by different methods was investigated.The study demonstrates that the Co_(3)O_(4)catalyst(Co_(3)O_(4)-a)prepared by adding CoCl_(2)·6H_(2)O to an excess KOH solution and ultrasonic treatment at room temperature has a high specific surface area,abundant oxygen vacancies and excellent performance in activating peroxymonosulfate(PMS)for methylene blue(MB)degradation.Under optimal conditions(pH=7.00,catalyst concentration=50 mg/L,PMS concentration=100 mg/L,and initial MB concentration=15 mg/L),the degradation rate of MB exceeded 99%within 10 min.
作者
孙俊丽
何代平
邱昫麟
罗成颖
郑人伟
刘青松
SUN Junli;HE Daiping;QIU Xulin;LUO Chengying;ZHENG Renwei;LIU Qingsong(Chongqing Key Lab of Green Catalysis Materials and Technology,College of Chemistry,Chongqing Normal University,Chongqing 401331,China)
出处
《应用化工》
北大核心
2025年第8期2049-2055,共7页
Applied Chemical Industry
基金
重庆市自然科学基金(CSTB2022NSCQ-MSX0265)
重庆市教委项目(KJZD-K202200512,KJZD-M202400502)。
