Powder Technology, Vol.375, 463-471, 2020
Coca-Cola solvothermal synthesis of mesoporous SnO2 blooming flower-like architecture assembled from single crystal nanorods and its gas sensing properties
The novel synthetic strategy for functional metal oxide nanomaterials by using biomass reaction media has recently attracted great attention. Herein, mesoporous SnO2 blooming flower-like architectures, assembled from single crystal nanorods with a diameter of 50-100 nm, were firstly prepared using Coca-Cola solvothermal route. In contrast, SnO2 microspheres were obtained by hydrothermal reaction. These indicate that the biomasses in Coca-Cola play a regulatory role in the formation of flower-like SnO2 hierarchical structure with uniform mesopore of 12.87 nm. The results of various gases tested show that the sensor based on blooming flower-like SnO2 structure has good performance towards H2S gas at optimum working temperature of 170 degrees C. The sensitiv ity to 10 ppm H2S gas is 118.4, being almost three times higher than that of SnO2 microspheres (40.9). The sensor shows good linear relationship ranging 0.05 to 10 ppm with lower detection limit (50 ppb) and good selectivity. (C) 2020 Elsevier B.V. All rights reserved.