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 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing,100029,China [2]Beijing Key Laboratory of Energy Environmental Catalysis,Beijing University of Chemical Technology,Beijing,100029,China [3]College of Chemical Engineering,Beijing University of Chemical Technology,Beijing,100029,China [4]Anhui Key Lab of Coal Clean Conversion and Utilization,School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan,243032,China

出　　处：《Green Energy & Environment》2023年第1期275-282,共8页绿色能源与环境（英文版）

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

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.

关 键 词：CaC_(2) MECHANOCHEMISTRY Alkynyl carbon materials Hg(Ⅱ) Heavy metal Adsorption 

分 类 号：O64[理学—物理化学]