MXene-碳纳米管微球的制备及其对硝基芳烃化合物的电化学检测性能  

Preparation of MXene-Carbon Nanotube Microspheres and Its Application in Electrochemical Detection of Nitroaromatic Compounds

作　　者：刘雨 李厚燊 姚庆双 李佩瑶 孙义民 LIU Yu;LI Hou-Shen;YAO Qing-Shuang;LI Pei-Yao;SUN Yi-Min(Hubei Provincial Key Laboratory of Plasma Chemistry and New Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,等离子体化学与新材料湖北省重点实验室,武汉430205

出　　处：《分析化学》2025年第3期407-417,共11页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.51504168);武汉工程大学研究生教育创新基金项目(No.CX2022222)资助。

摘　　要：以三聚氰胺甲醛树脂(MF)微球为模板,包覆MXene纳米片制得MXene/MF微球,通过浸渍法使微球表面吸附Co(NO_(3))_(2),在氩气氛围下高温煅烧。以MF热解产生的CO和NH_(3)作为还原性气体,将Co^(2+)还原为单质Co;再以Co为催化剂,通过化学气相沉积(CVD)法原位生长碳纳米管(CNT),形成MXene-Co-CNT微球(MXene-Co-CNT MS)。在此过程中,MF微球热解具有双重作用:一方面,牺牲模板,使内部空心;另一方面,产生的气体在Co催化剂上通过CVD生成CNT,形成海胆状的外部结构,二者同时进行,形成新颖的结构。MXene-Co-CNT MS具有比表面积大、导电性良好以及电催化活性优异等优点,可用于硝基芳烃化合物(NACs)的高灵敏检测。MXene-Co-CNT MS修饰玻碳电极(MXene-Co-CNT MS/GCE)对2,4,6-三硝基甲苯(TNT)、1,3,5-三硝基苯(TNB)、2,4-二硝基甲苯(DNT)、1,3-二硝基苯(DNB)、1-氯-2,4-二硝基苯(Cl-DNB)和4-硝基苯酚(4-NP)的检出限分别为26.84、31.60、35.03、54.14、43.86和28.67 nmol/L,并且具有良好的抗干扰性能,可用于环境水样中NACs的准确检测。The MXene/MF microspheres were prepared by coating MXene nanosheets on melamine formaldehyde(MF)resin microspheres.Co(NO_(3))_(2)was adsorbed on the surface of the microspheres by impregnation,and then calcined at high temperature in an argon atmosphere.MF pyrolysis generated reducing gases such as CO and NH_(3),reducing Co^(2+)to elemental Co,which was then used as a catalyst for in situ growth of carbon nanotube(CNT)through chemical vapor deposition(CVD),forming MXene-Co-CNT microspheres(MXene-Co-CNT MS).During this process,the pyrolysis of MF microspheres had dual effects.On one hand,the template was sacrificed to produce an internal hollow structure,and on the other hand,the generated gas worked as carbon source to generate CNT,forming an external sea urchin-like structure.Both of them promoted the formation of a novel structure,which combined the advantages of large specific surface area and good conductivity,thus possessing excellent electrocatalytic activity.The MXene-Co-CNT MS was modified on glassy carbon electrode(GCE)and further used in highly sensitive detection of nitroaromatic compounds(NACs).The detection limits of MXene-Co-CNT MS/GCE for 2,4,6-trinitrotoluene(TNT),1,3,5-nitrobenzamide(TNB),2,4-dinitrotoluene(DNT),1,3-dinitrobenzene(DNB),1-Cl-2,4-dinitrotoluene(Cl-DNB),and 4-nitrophenol(4-NP)were 26.84,31.60,35.03,54.14,43.86 and 28.67 nmol/L,respectively.It also had excellent anti-interference ability,and was used to detect NACs in environmental water samples accurately.

关 键 词：MXene-碳纳米管微球 三聚氰胺甲醛树脂 牺牲模板法 化学气相沉积 硝基芳烃化合物 电化学检测 

分 类 号：O657.1[理学—分析化学]