A microscale formaldehyde gas sensor based on Zn2SnO4/SnO2 and produced by combining hydrothermal synthesis with post-synthetic heat treatment
Source abstract
Abstract
A silicon-based micro-structure gas sensor for detecting formaldehyde was successfully fabricated and the sensing material was synthesized via a method of combining the traditional hydrothermal synthesis with subsequent heat treatment. Finite element analysis software of ANSYS was used to analyze the temperature distribution on the SiO2/Si substrate with heating electrodes and signal electrodes on the same plane with the aim of reducing the complexity of micro-machining process. Meanwhile, in order to obtain lower power consumption, two different structures of the SiO2/Si substrates with and without back etched were simulated, respectively. The simulation results showed that in the same heat rate and convection conditions, the back-etched SiO2/Si substrate had higher temperature, more uniform temperature distribution, and lower energy consumption. The Zn2SnO4/SnO2 cubes were obtained by annealing the as-synthesized precursors of ZnSn(OH)6 at 700 °C for 3 h. Thermal gravimetric and differential thermal analyzer, X-ray diffraction, Fourier transform infrared spectra, scanning electron microscopy, and energy-dispersive X-ray spectroscopy were analyzed to characterize the phase structure, composition, morphology, and elemental atomic ratio of Zn2SnO4/SnO2. The gas sensing properties of Zn2SnO4/SnO2 were tested, which showed that the gas sensor based on Zn2SnO4/SnO2 exhibited excellent formaldehyde sensing performance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Advanced Chemical Sensor Technologies · Analytical Chemistry and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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