Synthesis of graphitic carbon nitride nanosheets decorated spherical-like nickel oxide composites for carbon monoxide gas-sensing application

Micro & nano letters

article

Xiaoze Li¹  Wendi Tian¹  Jianbo Jia¹  Jianliang Cao¹  Zhanying Zhang²  Yan Wang² 

[1] College of Chemistry and Chemical Engineering, Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University;The Collaboration Innovation Center of Coal Safety Production of Henan Province, College of Safety Science and Engineering, Henan Polytechnic University

关键词: scanning electron microscopy;    carbon compounds;    gas sensors;    nickel compounds;    nanosensors;    nickel;    graphite;    nanocomposites;    p-n heterojunctions;    graphitic carbon nitride nanosheets;    carbon monoxide gas-sensing application;    nickel oxide microspheres;    scanning electron microscopy;    stability;    CO-sensing performance;    hydrothermal method;    spherical-like nickel oxide composites;    p–n heterojunction;    surface reactions;    temperature 240.0 degC;    NiO-C-Ni-CN;   

DOI  :  10.1049/mnl.2019.0436

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, graphitic carbon nitride nanosheets decorated like nickel oxide microspheres (NiO/g-C 3 N 4 , Ni/CN) were successfully synthesised by a simple hydrothermal method. The morphologies of the as-prepared samples were analysed by scanning electron microscopy and the diameter of the microspheres was found to be about 2.5 μm. At an optimum working temperature of 240°C, the response to 500 ppm CO is 2.729 for the Ni/CN-10 (10 wt% g-C 3 N 4 modified NiO) sensor, which is much higher than those of the NiO sensor (1.408). Besides the higher response, the Ni/CN sensors also showed good repeatability and stability for CO detection. Excellent gas sensitivity properties can be attributed to the p–n heterojunction formed at the interface, which can provide more potential active sites for surface reactions. In addition, the sensitisation of g-C 3 N 4 also plays an important role in the improvement of CO-sensing performance.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND