Electrochemical Detection of Nitroaromatic Compounds Using Hollow Spherical Carbon Nanotube-MXene-Cobalt Composites
In this paper,hollow Co spheres(Co HS)were one-step synthesized by ultrasonic spray pyrolysis,then MXene nanosheets were subsequently coated on their surface to get MXene/Co HS through immersion.Under the catalysis of Co HS,carbon nanotubes(CNT)were grown on the surface of MXene/Co HS to get CNT-MXene/Co hollow sphere composite(CNT-MXene/Co HS)through chemical vapor deposition(CVD)with acetylene as the carbon source and hydrogen as the reducing gas.By modifying glassy carbon electrode with CNT-MXene/Co HS,precise electrochemical detection of nitroaromatic compounds could be achieved.The results showed that the detection limits of CNT-MXene/Co HS-modified electrodes for 4-NP,DNT,DNB,Cl-DNB and TNB were 6.6 nmol·L-1,11.6 nmol·L-1,10.9 nmol·L-1,10.7 nmol·L-1 and 21.4 nmol L-1(S/N=3),respectively.In addition,the electrode also exhibited good anti-interference ability,hence it processes great application prospects in the field of environmental monitoring and water sample analysis.
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