School of Chemistry and Environment, South China Normal University , Guangzhou 510006, P. R. China.
Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University , Guangzhou 510006, P. R. China.
ACS Appl Mater Interfaces. 2016 Feb 10;8(5):3428-37. doi: 10.1021/acsami.5b11607. Epub 2016 Feb 1.
A new general method for the fabrication of a reduced graphene oxide (rGO)-based ordered monolayer macroporous film composed of a layer of closely arranged pores is introduced. Assisted by the polystyrene microsphere monolayer colloid crystal by a simple solution-heated method, pure rGO, rGO-SnO2, rGO-Fe2O3, and rGO-NiO composite monolayer ordered porous films were examplarily constructed on the curved surface of a ceramic tube widely used in gas sensors. The rGO-oxide composite porous films could exhibit much better sensing performances than those of the corresponding pure oxide films and the composite films without the ordered porous structures in detecting ethanol gas. The enhancement mechanisms induced by distinctive rGO-oxide heterojunctions and porous structures as well as the effects of the rGO content and the pore-size on the sensitivity of the composite films were systematically analyzed and discussed. This study opens up a kind of construction method for an rGO-based composite film gas sensor with uniform surface structures and high performance.
介绍了一种新的制备还原氧化石墨烯(rGO)基有序单层大孔膜的通用方法，该膜由一层紧密排列的孔组成。通过简单的溶液加热方法辅助聚苯乙烯微球单层胶体晶体，在广泛应用于气体传感器的陶瓷管的曲面上，成功制备了纯 rGO、rGO-SnO2、rGO-Fe2O3 和 rGO-NiO 复合单层有序多孔膜。与相应的纯氧化物薄膜和没有有序多孔结构的复合薄膜相比，rGO-氧化物复合多孔薄膜在检测乙醇气体时表现出更好的传感性能。系统分析和讨论了由独特的 rGO-氧化物异质结和多孔结构引起的增强机制，以及 rGO 含量和孔径对复合薄膜灵敏度的影响。该研究为具有均匀表面结构和高性能的 rGO 基复合薄膜气体传感器开辟了一种构建方法。
