Abstract

In this work, graphitic carbon nitride (g-C₃N₄) was synthesized by simple pyrolysis of melamine, and it was hybridized with reduced graphene oxide (rGO) and silver nanoparticles (AgNPs) using a stepwise solution method. AgNPs were randomly distributed on the surface of rGO/g-C₃N₄ layered hybrid structure, forming Ag@rGO/g-C₃N₄ composite. It was disclosed that the Ag@rGO/g-C₃N₄ composite responded to both oxidizing and reducing gases at room temperature, and its response was greatly enhanced from those of pristine rGO and rGO/g-C₃N₄. The room temperature responses of the composite were estimated at − 95% and 8% for 50 ppm of NO₂ and NH₃, respectively. The roles of structural components were discussed, and a gas-sensing mechanism was proposed based on the respective roles. In particular, AgNPs turned out to play an important role in the gas-sensing activity.

Graphic Abstract

Open image in new window

抽象的

在这项工作中，通过三聚氰胺的简单热解合成了石墨碳氮化物（gC ₃ N ₄），并使用逐步溶液法将其与还原型氧化石墨烯（rGO）和银纳米颗粒（AgNPs）杂交。AgNPs随机分布在rGO / gC ₃ N ₄层状混合结构的表面，形成Ag @ rGO / gC ₃ N ₄复合材料。公开了Ag @ rGO / gC ₃ N ₄复合物在室温下对氧化性气体和还原性气体均具有响应，并且与原始rGO和rGO / gC ₃ N _4的响应相比，其响应性大大增强。。对于50 ppm的NO ₂和NH ₃，复合材料的室温响应估计分别为-95％和8％。讨论了结构部件的作用，并根据各自的作用提出了一种气体传感机制。尤其是，AgNPs在气体传感活动中起着重要作用。

图形摘要

在新窗口中打开图像