Mechanochemical synthesis of oxygenated alkynyl carbon materials with excellent Hg(Ⅱ) adsorption performance from CaC2 and carbonates

作     者：Yingjie Li Songping Li Xinyi Xu Hong Meng Yingzhou Lu Chunxi Li Yingjie Li;Songping Li;Xinyi Xu;Hong Meng;Yingzhou Lu;Chunxi Li

作者机构：State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China Beijing Key Laboratory of Energy Environmental CatalysisBeijing University of Chemical TechnologyBeijing100029China College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing100029China Anhui Key Lab of Coal Clean Conversion and UtilizationSchool of Chemistry and Chemical EngineeringAnhui University of TechnologyMaanshan243032China 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2023年第8卷第1期

页      面：275-282页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070304[理学-物理化学(含∶化学物理)] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 

基　　金：supports from the National Natural Science Foundation of China(No.21776015) the University Scientific Research Project of Anhui Province(No.KJ2018A0065&KJ2020A0245). 

主　　题：CaC_(2) Mechanochemistry Alkynyl carbon materials Hg(Ⅱ) Heavy metal Adsorption 

摘      要：Adsorptive removal of heavy metal ions from wastewater is very important,and the key is the development of efficient sorbents.In this work,oxygenated alkynyl carbon materials(OACMs)were synthesized via mechanochemical reaction of CaC_(2) and a carbonate(CaCO_(3),Na2CO_(3),or NaHCO_(3))at ambient temperature.The resultant OACMs are micro mesoporous carbon nanomaterials with high specific area(648 m2 g^(-1)),highly crosslinked texture,and rich alkynyl and oxygenated groups.The OACMs exhibit excellent Hg(Ⅱ)adsorption due to the soft acid-soft base interaction between alkynyl and Hg(Ⅱ),and OACM-3 derived from CaC_(2) and NaHCO_(3) has the saturated Hg(Ⅱ)adsorbance of 483.9 mg g^(-1)along with good selectivity and recyclability.The adsorption is mainly chemisorption following the Langmuir mode.OACM-3 also shows high adsorbance for other heavy metal ions,e.g.256.6 mg g^(-1)for Pb(II),232.4 mg g^(-1)for Zn(II),and 198.7 mg g^(-1)for Cu(II).This work expands the mechnochemical reaction of CaC_(2)with carbonates and possibly other oxyanionic salts,provides a new synthesis approach for functional alkynyl carbon materials with excellent adsorption performance for heavy metal ions,as well as a feasible approach for CO2 resource utilization.