P掺杂煤沥青基多孔炭的制备及对废水中广谱抗生素的吸附性能  

Preparation of P-doped Coal Pitch-based Porous Carbon and Its Adsorption Performance for Broad-spectrum Antibiotics in Wastewater

作　　者：余谟鑫[1,2] 史文旭 孙宇航 张晨 王晓婷[1,3] YU Moxin;SHI Wenxu;SUN Yuhang;ZHANG Chen;WANG Xiaoting(School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243000,China;Sinosteel New Materials Co.,Ltd.,Ma'anshan 243000,China;Magang(Group)Holding Co.,Ltd.,Ma'anshan 243000,China)

机构地区：[1]安徽工业大学化学与化工学院,马鞍山243000 [2]中钢天源股份有限公司,马鞍山243000 [3]马钢集团股份有限公司,马鞍山243000

出　　处：《高等学校化学学报》2024年第4期113-124,共12页Chemical Journal of Chinese Universities

基　　金：安徽省博士后科研项目(批准号:2021B547);安徽省教育厅自然科学研究项目(批准号:KJ2021A0399)资助。

摘　　要：以煤沥青为碳源,一水合次亚磷酸钠为磷源,氧化镁为模板耦合KOH活化,采用一步法制备了多孔炭(CPC_(x));并采用扫描电子显微镜、氮气吸附-脱附仪、傅里叶变换红外光谱和X射线光电子能谱等对炭材料进行了表征,考察了CPC_(x)对土霉素和氯霉素的吸附性能.结果表明,当煤沥青与磷源的质量比为2∶1时,制得的CPC_(2.0)总比表面积和微孔比表面积分别为2739和2353 m^(2)/g,平均孔径为3.78 nm;苯基吸收峰有所加深,出现新的P—O伸缩振动峰;碳材料表面的磷及磷构型中最稳定的C_(3)—P=O官能团含量分别达0.45%和37.7%(摩尔分数);Langmuir模型和拟二级动力学模型能更好地描述CPC_(2.0)对抗生素的吸附过程,CPC_(2.0)对土霉素和氯霉素的最大吸附容量分别为1780和1122 mg/g,表现出优异的吸附性能.P-doped porous carbon(CPC_(x))was prepared by one-step method with coal tar pitch as carbon,sodium hypophosphite monohydrate as phosphorus sources and MgO as template coupled with KOH activation.CPC_(x)were characterized by SEM,BET,FTIR,XPS,and the adsorption properties of porous carbon for oxytetracycline and chloramphenicol were investigated.When the mass ratio of coal tar pitch to phosphorus source is 2∶1,the BET results show that the total specific surface area and the microporous specific surface area of as-made CPC_(2.0)are 2739 and 2353 m2/g,respectively,and the average pore size is 3.78 nm.The results of FTIR indicate that the phenyl absorption peak for CPC_(x)is deepened compared to the original carbon,as well as a new stretching vibration peak of P—O is displayed.The XPS results demonstrate that the P content and the most stable C_(3)—P=O functional group content of phosphorus configuration on the surface of carbon materials are 0.45%and 37.7%(molar fraction).The adsorption process of antibiotics by CPC_(2.0)can be better described by Langmuir model and pseudo second-order kinetic model,and the maximum adsorption capacities of CPC_(2.0)for oxytetracycline and chloramphenicol are 1780 and 1122 mg/g,respectively,showing better adsorption performance.

关 键 词：多孔炭 吸附 磷掺杂 抗生素 

分 类 号：O647.3[理学—物理化学]