首页|高比表面积掺氮多孔炭的制备及其对金霉素的吸附性能研究

高比表面积掺氮多孔炭的制备及其对金霉素的吸附性能研究

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以煤沥青为碳源,三聚氰胺为氮源,MgO模板耦合KOH活化一步法热解制备具有高比表面积的掺氮多孔炭MCCx,其中x代表不同的氮源添加含量.采用比表面积及孔径分布(BET)、扫描电子显微镜(SEM)、傅立叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)等表征方法对MCCx进行了表征分析,并考察了 MCCx对金霉素的吸附性能.结果表明,当煤沥青与三聚氰胺的质量比为0.5时,制得的MCC0.5表面富含大量孔道,且伴随堆积褶皱片层,其微孔比表面积可达到2 042 m2·g-1.傅立叶变换红外光谱图表明MCCx出现了芳香族化合物的C=N键的伸缩振动.XPS分析结果表明三聚氰胺的添加成功为材料引入氮元素,MCC0.5吡啶N含量最高.Langmuir吸附等温线模型能很好的描述MCC05对金霉素的吸附过程,最大理论吸附量达到1 056 mg·g-1.
Preparation of N-doped porous carbon with high specific surface area and its adsorption performance for chlortetracycline
Coal pitch and melamine were taken as carbo source and nitrogen source,respectively,the nitrogen-doped porous carbon(MCCx)with high specific surface area was prepared by one-step pyrolysis method with MgO template coupled with KOH activation.The MCCx was characterized by BET、SEM、FTIR and XPS,and its adsorption capacity for chlortetracycline(CTC)was investigated.The results showed that when the mass ratio of coal bitumen to melamine was 0.5,the obtained MCC0.5 contained a large number of pores with accumulated fold laminates.The micropores specific surface area of MCC0.5 could reach 2 042 m2·g-1.The FTIR spectra of MCCx showed that the stretching vibration of the C=N of aromatic compounds appeared.XPS results showed that N element was successfully introduced in MCCx with the addition of melamine,and MCC0.5 had the highest pyridine N content.Langmuir adsorption isotherm model could well describe the adsorption process of CTC on MCC0.5,with the maximum theoretical adsorption capacity of 1 056 mg·g-1.

melaminechlortetracyclinenitrogen dopingporous carbonchemical adsorption

余谟鑫、黄康、张振、张晨、王晓婷

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安徽工业大学化学与化工学院,马鞍山 243000

中钢天源股份有限公司,马鞍山 243000

马钢集团股份有限公司,马鞍山 243000

三聚氰胺 金霉素 氮掺杂 多孔炭 化学吸附

安徽省博士后科研项目安徽省高校自然科学研究项目

2021B547KJ2021A0399

2024

环境工程学报
中国科学院生态环境研究中心

环境工程学报

CSTPCD北大核心
影响因子:0.804
ISSN:1673-9108
年,卷(期):2024.18(1)
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