Synthesis of octahedron Zn2SnO4 by hydrothermal method for high performance ethanol sensor

Nguyen Hong Hanh; Lai Van Duy; Chu Manh Hung; Nguyen Van Duy; Nguyen Van Hieu; Nguyen Duc Hoa

doi:10.15625/2525-2518/58/2/14019

Author affiliations

Authors

Nguyen Hong Hanh International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Lai Van Duy International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Chu Manh Hung International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Nguyen Van Duy International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam
Nguyen Van Hieu Faculty of Electrical and Electronic Engineering, Phenikaa Institute for Advanced Study (PIAS), Phenikaa University, Yen Nghia, Ha-Dong district, Ha Noi, Viet Nam
Nguyen Duc Hoa International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/58/2/14019

Keywords:

The octahedron Zn2SnO4 was prepared through a facile hydrothermal method for ethanol gas-sensing application. The synthesized material was characterized by scanning electron microscopy (SEM), powder x-ray diffraction (XRD). The gas-sensing characteristics

Abstract

The octahedron Zn₂SnO₄ was prepared through a facile hydrothermal method for ethanol gas-sensing application. The synthesized material was characterized by scanning electron microscopy (SEM), powder x-ray diffraction (XRD). The gas-sensing characteristics were measured at various concentrations of ethanol at temperature ranging from 350 to 450 ºC. The gas response exhibits good linear relationship with the increasing of ethanol concentrations in the range of 50-250 ppm. Gas-sensing measurements demonstrated that the synthesized octahedron Zn₂SnO₄showed n-type semiconducting behavior, where the sensor resistance decreased upon exposure to ethanol. Results pointed out that the sensors showed the highest response value at operating temperature of 400 ºC. The sensor response value was 30 at 250 ppm ethanol. Such outstanding gas sensing property might be attributed to the morphology of the octahedra which provided large contact area between Zn₂SnO₄ and target gas. The synthesized octahedron Zn₂SnO₄ is potential for detecting traces of ethanol.

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