原位氮掺杂活性血炭对苯胺吸附性能研究  

Adsorption of aniline by in-situ nitrogen-doped activated blood carbon

作　　者：张兴萍 李海朝 ZHANG Xing-ping;LI Hai-chao(Key Laboratory of Applied Physical Chemistry of Qinghai Provincial,Qinghai Nationalities University,Xining 810007,China;Institute of Resource Chemistry of Qinghai,Qinghai Nationalities University,Xining 810007,China)

机构地区：[1]青海民族大学化学化工学院,青海省应用物理化学重点实验室,青海西宁810007 [2]青海民族大学化学化工学院,青海资源化学研究所,青海西宁810007

出　　处：《化学研究与应用》2022年第1期103-109,共7页Chemical Research and Application

基　　金：青海省自然科学基金项目(2019-ZJ-928)资助;青海民族大学研究生创新项目(12M2021004)资助;2021年度天津大学-青海民族大学自主创新基金项目资助。

摘　　要：以猪血粉为原料,磷酸为活化剂,用化学活化法制备原位氮掺杂活性炭(BN-AC),并用于苯胺的吸附。采用元素分析、FTIR、XPS等分析方法研究了BN-AC的理化性质。分析结果表明BN-AC比表面积为461.0 m^(2)·g^(-1),总孔容为0.3 cm^(3)·g^(-1)。BN-AC表面含有吡啶氮、吡咯氮和石墨氮,成功地保留了血粉中的N成分。BN-AC吸附苯胺的吸附动力学表明,BN-AC对苯胺的吸附过程更满足Pseudo二阶动力学模型。吸附等温线表明BN-AC对苯胺的吸附符合Freundlich等温线,吸附过程为外部液膜扩散、表面吸附和颗粒内扩散的双分子层吸附。吸附热力学表明吸附过程为自发、吸热且物理和化学吸附结合。In situ nitrogen-doped activated carbon(BN-AC)was prepared by chemical activation method with pig blood as raw material and phosphoric acid as activator,and used for the adsorption of aniline.The physicochemical properties of BN-AC were tested by elemental analysis,FTIR and XPS.The results showed that the specific surface area of BN-AC was 461.0 m^(2)·g^(-1),and the total pore volume was 0.3 cm^(3)·g^(-1).The surface of BN-AC contained pyridine nitrogen,pyrrole nitrogen and graphite nitrogen,which successfully retained the N component from blood.The adsorption kinetics of BN-AC on aniline showed that the adsorption process of BN-AC on aniline was more suitable to Pseudo second-order kinetics model.The adsorption isotherm showed that the adsorption of aniline by BN-AC conformed to the Freundlich isotherm,and the adsorption process consists of external liquid film diffusion,surface adsorption and intra-particle diffusion bilayer adsorption.The adsorption thermodynamics showed that the adsorption process was spontaneous,endothermic and physical and chemical adsorption.

关 键 词：原位氮掺杂 活性炭 血粉 含氮官能团 苯胺吸附 

分 类 号：O647.3[理学—物理化学]