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Nitrogen-doped graphene as an efficient metal-free catalyst for ammonia and non-enzymatic glucose sensing
Journal of Physics and Chemistry of Solids ( IF 4 ) Pub Date : 2021-09-03 , DOI: 10.1016/j.jpcs.2021.110359
Waseem Raza 1 , Khursheed Ahmad 2 , Haekyoung Kim 2
Affiliation  

Theoretical studies reveal that the electronic and chemical properties of graphene can be significantly altered by chemical doping with a nitrogen atom. In the present work, a unique strategy has been applied for the manufacture of selective N-doped graphene (NG). A low cost, and facile one pot solvothermal approach has been adopted for the synthesis p-type nitrogen graphene. Moreover, the as-synthesized NG sheets exhibit a crossover from n-type to p-type behaviour. The presence of pyridinic-N in graphene planes is confirmed by high-resolution X-ray photoelectron spectroscopy. The as-synthesized NG presents excellent sensing properties towards ammonia, and fast electron transfer kinetics for glucose oxidase. The higher sensing activity is ascribed to synergistic effect of nitrogen, and oxygen-containing functional groups. The resultant NG is proven to act as a metal-free catalyst with much better performance for ammonia and glucose sensing at room temperature. This study will provide a promising potential for the development of NG type sensors in the real world and environmental applications.



中文翻译:

氮掺杂石墨烯作为氨和非酶葡萄糖传感的有效无金属催化剂

理论研究表明,通过化学掺杂氮原子可以显着改变石墨烯的电子和化学性质。在目前的工作中,一种独特的策略已被应用于制造选择性 N 掺杂石墨烯 (NG)。已采用低成本且简便的一锅溶剂热法合成 p 型氮石墨烯。此外,合成后的 NG 片表现出从 n 型到 p 型的交叉行为。通过高分辨率 X 射线光电子能谱证实了石墨烯平面中吡啶-N 的存在。合成后的 NG 对氨具有优异的传感特性,对葡萄糖氧化酶具有快速的电子转移动力学。较高的传感活性归因于氮和含氧官能团的协同作用。由此产生的 NG 被证明可以作为一种无金属催化剂,在室温下对氨和葡萄糖的传感性能要好得多。这项研究将为在现实世界和环境应用中开发 NG 型传感器提供有希望的潜力。

更新日期:2021-09-13
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