Preparation of cross-linked porous SnO2 nanosheets using three-dimensional reduced graphene oxide as a template and their gas sensing property

Abstract

Semiconductor metal oxide nanostructures with large specific surface areas and high porosity will enhance their gas-sensing performance. Here, cross-linked porous tin dioxide nanosheets were obtained using three-dimensional reduced graphene oxide as a template followed by an annealing process. The as-synthesized porous SnO 2 nanosheets were composed of nanocrystals with a mean diameter of ca. 7.6 nm. The products were characterized using a range of techniques. The sensing property of the cross-linked porous SnO 2 nanosheets for toxic organic vapors, such as ethanol, acetone, isopropanol, benzene, methylbenzene, methanol, and formaldehyde, were studied. The sensor showed a high response of 37.9 for 100 ppm acetone, making it a promising candidate as a practical detector of volatile organic compounds. • A special cross-linked porous tin dioxide nanosheets were developed. • It involves a template solvothermal method and a subsequent annealing process. • The cross-linked porous SnO 2 nanosheets exhibit high sensing performance for VOCs. • High performance is due to cross-linked structure with small size nanocrystals.