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首页> 外文期刊>Journal of materials science >Flexible chemiresistive nitrogen oxide sensors based on a nanocomposite of polypyrrole-reduced graphene oxide-functionalized carboxybenzene diazonium salts
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Flexible chemiresistive nitrogen oxide sensors based on a nanocomposite of polypyrrole-reduced graphene oxide-functionalized carboxybenzene diazonium salts

机译：基于含有聚吡咯 - 还原氧化石墨烯官能化羧基苯重氮盐的柔性化学氮氧化物传感器

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摘要

A new nanocomposites series of polypyrrole/reduced graphene oxide (PPy/ rGO) and polypyrrole/reduced graphene oxide covalently bonded with aryl 4-carboxybenzene diazonium salt (PPy/rGO-aryl-COOH) were prepared by simple one-step chemical oxidative synthesis. Spin coating technique was used to deposit the as-prepared nanocomposites on BOPET substrate for testing their chemiresistive sensitivity properties towards online detection of (NO_2) vapors at ambient temperature. The recorded morphological and structural data confirmed that PPy/rGO-aryl-COOH forms a homogeneous nanocomposite within the size of 80 nm and improvement of the crystalline ordering. PPy/rGO-aryl-COOH revealed the optimal NO_2 sensing properties in terms of higher sensitivity (1.01%/ppm), faster response time (129 s), detection limit of (2 ppm), and reproducibility. Moreover, stability was tested under humidity and temperature effects. Finally, impedance spectroscopy is conducted in the fresh air and in the presence of gas. These results highlight the paramount role of functionalization of reduced graphene oxide (rGO-aryl-COOH) in improving both the sensitivity and the reactivity of our produced nanocomposite regarding NO_2. Strong interaction between the NO_2 gas molecules and the aryl-COOH-functionalized rGO has dramatically enhanced the electronic properties of these nanocomposites. These striking characteristics of the newly developed nanocomposites make them very suitable for NO_2 gas sensing.
机译：通过简单的单步化学氧化合成制备新的纳米复合材料系列萘吡咯/氧化石墨烯（PPY / RGO）和聚吡咯/瓦尔替氧化物氧化萘丙烯酸盐（PPY / RGO-芳基-COOH）。旋转涂层技术用于沉积在BOPET底物上的制备的纳米复合材料沉积在环境温度下在线检测（NO_2）蒸汽的在线检测中的化学灵敏度。记录的形态和结构数据证实，PPY / RGO-芳基-COOH在80nm的尺寸范围内形成均匀的纳米复合材料并改善结晶排序。 PPY / RGO-芳基-COOH在更高的灵敏度（1.01％/ ppm），更快的响应时间（129秒），检测极限和再现性方面，最佳NO_2感测性能。此外，在湿度和温度效应下测试稳定性。最后，阻抗光谱在新鲜空气中和气体存在下进行。这些结果突出了石墨烯氧化物（RGO-芳基-COOH）的官能化的最重要作用，提高了我们产生的纳米复合材料的敏感性和反应性关于NO_2。 NO_2气体分子与芳基 - COOH官能化RGO之间的强相互作用显着增强了这些纳米复合材料的电子性质。新开发的纳米复合材料的这些引人注目的特性使它们非常适合NO_2气体感测。

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  • 来源
    《Journal of materials science》 |2021年第8期|10662-10677|共16页
  • 作者

    Djamil Guettiche; Ahmed Mekki; Benmouloud Lilia; Tighilt Fatma-Zohra; Ammar Boudjellal;

  • 作者单位

    Ecole Militaire Polytechnique BP 17 Bordj El Bahri 16111 Alger Algeria;

    Ecole Militaire Polytechnique BP 17 Bordj El Bahri 16111 Alger Algeria;

    Ecole Militaire Polytechnique BP 17 Bordj El Bahri 16111 Alger Algeria;

    Centre de Recherche en Technologie des Semi-conducteurs pour I'Energetique Bd. Dr Frantz Fanon B.P 140 Alger-7 Merveilles 16038 Alger Algeria;

    Ecole Militaire Polytechnique BP 17 Bordj El Bahri 16111 Alger Algeria;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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