Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; State Key Laboratory of Cemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing 100029, China.
Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
J Colloid Interface Sci. 2021 Apr;587:183-191. doi: 10.1016/j.jcis.2020.10.113. Epub 2020 Oct 30.
The volatile gas of Triethylamine (TEA) can cause environment pollution and lead to the serious hurt of the human respiratory system. Therefore, it is necessary to detect low concentrations of TEA in our daily lives rapidly. The hybrid of pine dendritic BiVO/reduced graphene oxide (rGO) has been synthesized firstly by one step hydrothermal process. The gas sensing tests show that the 13.0 wt% rGO hybrid not only exhibits high response of 5.9 and rapid response of 11.4 s, but also exclusive selectivity and long-term stability to 10 ppm of TEA at the operating temperature of 180 °C. The formation of heterojunction and the incoporation of rGO are responsible for the improving sensing properties of the hybrid to TEA, the former results in reduction of the electron depletion layer at interface in hybrid, while the latter enhances the specific surface of the hybrid and accelerates the transfer of electrons. The research is expected to have wide application in the development of composite based gas sensors made of rGO/metal oxide semiconductors.
三乙胺（TEA）的挥发性气体可能会造成环境污染，并对人体呼吸系统造成严重伤害。因此，在日常生活中快速检测低浓度的 TEA 是很有必要的。我们通过一步水热法首次合成了松树枝状 BiVO/还原氧化石墨烯（rGO）的复合物。气体传感测试表明，在 180°C 的工作温度下，13.0wt% rGO 杂化材料不仅对 10ppm 的 TEA 表现出 5.9 的高响应和 11.4s 的快速响应，而且对 TEA 还具有独特的选择性和长期稳定性。异质结的形成和 rGO 的掺入提高了杂化物对 TEA 的传感性能，前者导致在杂化物界面处减少了电子耗尽层，而后者则增强了杂化物的比表面积并加速了电子转移。该研究有望在开发基于 rGO/金属氧化物半导体的复合气体传感器方面得到广泛应用。
