고감도 sub−ppm 수준의 다공성 CuO/In2O3나노구조 트리메틸아민 가스센서
Highly Sensitive sub-ppm level Trimethylamine Gas Sensor Based on Porous CuO/In2O3 Nanostructures
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Trimethylamine (TMA) is an organic amine gas that serves as a key indicator for evaluating the freshness of seafood. Wesynthesized a highly sensitive trimethylamine (TMA) sensor based on porous indium oxide (In2O3) nanoparticles (NPs)loaded with CuO in the range of 6.7 to 28.4 at.%. CuO was loaded by hydrazine reduction onto as prepared In2O3 NPs usingthe microwave irradiation method. Crystal structures, morphologies, and chemical composition of CuO/In2O3 nanostructures(NSs) were characterized by X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and inductively coupled plasma mass spectrometry. The response of the 23.8 at.% CuO/In2O3 to 2.5 ppm TMAat 325oC was 5.7, which was 2.8 times higher than that of porous In2O3 NPs. The high sensitivity and selective detectionof TMA were attributed to electronic interactions between CuO and In2O3 and the high catalytic activity of CuO to TMA. Altogether, this CuO/In2O3 sensor could be used in the future to detect low concentrations of TMA, thereby aiding in thestorage and distribution of marine food resources.
Abstract
Trimethylamine (TMA) is an organic amine gas that serves as a key indicator for evaluating the freshness of seafood. Wesynthesized a highly sensitive trimethylamine (TMA) sensor based on porous indium oxide (In2O3) nanoparticles (NPs)loaded with CuO in the range of 6.7 to 28.4 at.%. CuO was loaded by hydrazine reduction onto as prepared In2O3 NPs usingthe microwave irradiation method. Crystal structures, morphologies, and chemical composition of CuO/In2O3 nanostructures(NSs) were characterized by X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and inductively coupled plasma mass spectrometry. The response of the 23.8 at.% CuO/In2O3 to 2.5 ppm TMAat 325oC was 5.7, which was 2.8 times higher than that of porous In2O3 NPs. The high sensitivity and selective detectionof TMA were attributed to electronic interactions between CuO and In2O3 and the high catalytic activity of CuO to TMA. Altogether, this CuO/In2O3 sensor could be used in the future to detect low concentrations of TMA, thereby aiding in thestorage and distribution of marine food resources.
참고문헌 (17)
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