Synthesis of Zn2SnO4 octahedron with enhanced H2S gas-sensing performance

Zinc stannate (Zn2SnO4) that used for detecting traces of H2S was less concerned. In this work, Zn2SnO4 octahedra with the average size of 0.18 mu m were prepared through a facile hydrothermal method followed by an annealing process in air atmosphere. The fabricated sensor shows excellent selectivity and sensitivity to H2S at working temperature of 170 degrees C. The gas response exhibits good linear relationship with the increasing of concentrations in the range of 5-10 ppm. The response to 100 ppm H2S can reach up to 172.5 and the lowest detection limit is down to 5 ppb. Such outstanding gas property might be attributed to the morphology of the octahedra and the increased contact area between Zn(2)Sna(4) and target gas, which may has potential applications in detecting traces of H2S. (C) 2018 Elsevier Ltd. All rights reserved.