首页|(162990)Visible-light-activated TiO_2-NiFe_2O_4 heterojunction for detecting sub-ppm trimethylamine
(162990)Visible-light-activated TiO_2-NiFe_2O_4 heterojunction for detecting sub-ppm trimethylamine
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NSTL
Elsevier
Trimethylamine (TMA), which mainly emanates from decaying fish, is an important freshness indicator of seafood. In this work, a TiO_2-NiFe_2O_4 heterojunction was successfully synthesized for TMA detection using a simple and efficient hydrothermal method. The materials were characterized using X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The TiO_2-NiFe_2O_4-based sensor exhibited the largest response (12) to 10 ppm of TMA at 307 °C The response was further improved under white-light irradiation, increasing from 2.5 to 4.5 as the TMA concentration approached 3 ppm. The enhanced gas-sensing performance of the TiO_2-NiFe_2O_4 sensor under light irradiation was then explored by density functional theory (DFT) with an optical carrier. We believe that the developed strategy improves the gas-sensing ability for TMA detection and can potentially be used in gas sensors.
Gas sensorTrimethylamineHeterojunctionOptical carrierDensity functional theory
Wenhao Wang、Lu Zhang、Zhisong Liu
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Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, PR China
School of Science, Harbin Institute of Technology, Shenzhen 518055, PR China
NSTL
Elsevier
