Impact of reducing agents on the ammonia sensing performance of silver decorated reduced graphene oxide: Experiment and first principles calculations
Impact of reducing agents on the ammonia sensing performance of silver decorated reduced graphene oxide: Experiment and first principles calculations
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DOI：
10.1016/j.apsusc.2021.149886
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发表时间：
2021-05-08
影响因子：
6.7
通讯作者：
Karthikeyan, Balasubramanian
中科院分区：
文献类型：
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作者：
Mariappan, Sivalingam Muthu;Eswaran, Mathan K.;Karthikeyan, Balasubramanian
我们研究了基于银纳米颗粒 (Ag:rGO) 修饰的还原氧化石墨烯的有毒氨分子 (NH3) 的经济型室温传感器，以系统地了解所使用的还原剂所发挥的作用。为此，我们结合实验和理论方法对一组还原剂的传感性能进行了比较研究。具体来说，通过化学电阻方法对用还原剂葡萄糖、维生素 C 和硼氢化钠 (NaBH4) 制备的 Ag:rGO 进行了实验研究，并通过第一性原理计算进行了理论建模。由于能带弯曲具有良好的电荷转移动力学，NaBH4 被证明是一种有效的还原剂。
We investigate economic room temperature sensors for toxic ammonia molecules (NH3) based on reduced graphene oxide decorated with silver nanoparticles (Ag:rGO) to provide a systematic understanding of the role played by the employed reducing agent. To this aim, we perform a comparative study of the sensing performance for a set of reducing agents, using a combination of experimental and theoretical methods. Specifically, Ag:rGO prepared with the reducing agents glucose, vitamin C, and sodium borohydride (NaBH4) is studied experimentally by the chemi-resistive method and is modelled theoretically by first-principles calculations. NaBH4 turns out to be an effective reducing agent due to favourable charge transfer kinetics by band bending.