Facile fabrication of novel cobalt-based carbonaceous coatings on nickel-titanium alloy fiber substrate for selective solid-phase microextraction  

作　　者：Junliang Du Rong Zhang Feifei Wang Hua Zhou Xuemei Wang Xinzhen Du 

机构地区：[1]College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China [2]Department of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang 621000,China

出　　处：《Chinese Chemical Letters》2022年第6期3119-3122,共4页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21765020 and 21265019)。

摘　　要：Fabrication of selective adsorption coatings plays a crucial role in solid-phase microextraction(SPME).Herein,new strategies were developed for the in-situ fabrication of novel cobalt-based carbonaceous coatings on the nickel-titanium alloy(Ni Ti)fiber substrate using ZIF-67 as a precursor and template through the chemical reaction of ZIF-67 with glucose,dopamine(DA)and melamine,respectively.The adsorption performance of the resulting coatings was evaluated using representative aromatic compounds coupled to high-performance liquid chromatography(HPLC)with ultraviolet detection(HPLC-UV).The results clearly demonstrated that the adsorption selectivity was subject to the surface elemental composition of the fiber coatings.The cobalt and nitrogen co-doped carbonaceous coating showed better adsorption selectivity for ultraviolet filters.In contrast,the cobalt-doped carbonaceous coating exhibited higher adsorption selectivity for polycyclic aromatic hydrocarbons.The fabricated fibers present higher mechanical stability and higher adsorption capability for model analytes than the commercial polydimethylsiloxane and polyacrylate fibers.These new strategies will continue to expand the Ni Ti fibers as versatile fiber substrates for metal-organic frameworks(MOFs)-derived coating materials with controllable nanostructures and tunable properties.

关 键 词：ZIF-67 Cobalt-based carbonaceous coatings Nickel/titanium alloy Solid-phase microextraction 

分 类 号：O658.2[理学—分析化学] O647.3[理学—化学]