Cross-Linked SnO2 Nanosheets Modified by Ag Nanoparticles for Formaldehyde Vapor Detection

Ag@SnO2 nanosheets were prepared through a hydrothermal method followed by heat treatment and liquid reduction process. Many Ag nanoparticles (Ag NPs) dispersed uniformly over the surface of SnO2 nanosheets. The thickness was approximately 10 nm. After decoration with NPs, nanosheet sensors exhibited improved gas-sensing behaviors compared to pure sensor. response cross-linked decorated NP for 100 ppm formaldehyde vapor up 101.4, which double that (45.5) recovery times sensor 21 s 23 s, respectively. showed reasonable cycling stability, as demonstrated testing times. superior due large specific area, nanostructure, synergistic effect NPs huge sensitizing active sites numerous