摘要
高温煅烧生物炭(BC)和三聚氰胺的混合物制备了氮掺杂生物炭(N/BC),采用拉曼、XPS、SEM、FTIR等方法对样品进行了系统的表征分析。通过活化过二硫酸钠(PDS)降解染料溴甲酚绿探讨了材料的催化性能。研究发现N掺杂可以显著提高BC的活化性能;N/BC10的催化性能相对于BC和N/BC0分别提高了82和31倍;ESR测试和猝灭实验证实体系主要的活性物质为单线态氧(^(1)O_(2)),在反应体系中没有产生硫酸根自由基(SO_(4)^(·-))和羟基自由基(·OH)。
N-doped biochar(N/BC)was prepared by pyrolysis the mixture of biochar(BC)and melamine at high temperature.The physical properties were systematically explored with Raman,XPS,SEM,FTIR and BET.The catalytic performance of the product was evaluated by degradation of dye bromocresol green(BCG)with BC or N/BC as catalysts to activate peroxydisulfate(PDS).The results demonstrated that the catalytic performance of N/BC10 was 82 and 31 times that of the BC and N/BC0,respectively.ESR test and quenching test verified that sulfate radical SO_(4)^(·-)and hydroxyl radical(·OH)are not produced in the reaction system,and the main active species of the system is singlet oxygen(^(1)O_(2)).
作者
王磊
黄帅
路长远
陈西良
陈欣
WANG Lei;HUANG Shuai;LU Changyuan;CHEN Xiliang;CHEN Xin(Henan Kaifeng Ecological Environment Monitoring Center,Kaifeng 475000,Henan,China;Yellow River Conservancy Technical Institute,Kaifeng 475004,Henan,China;College of Chemistry and Molecular Sciences,Henan University,Kaifeng 475004,Henan,China)
出处
《化学研究》
CAS
2023年第5期455-462,共8页
Chemical Research
基金
河南省重大科技专项(221100320200)。
关键词
生物炭
氮掺杂
过硫酸盐活化
水处理
biochar
nitrogen doping
persulfate activating
water treatment