Highly sensitive and selective trimethylamine sensors based on WO3 nanorods decorated with Au nanoparticles |
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| Affiliation: | 1. School of Engineering Science, College of Engineering, University of Tehran, Tehran, Iran;2. Nano Robotics Laboratory, Center of Excellence in Design, Robotics & Automation (CEDRA), School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran;3. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran;1. College of Materials and Chemical Engineering, Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China;2. State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, Gansu, PR China;3. American Advanced Nanotechnology, Houston, TX 77459, USA;1. Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China;2. College of Mechanical and material engineering, North China University of Technology, Beijing 100144, China;1. Laboratoire des Matériaux et Environnement, Faculté des Sciences, Département de Chimie, Université Ibn Zohr, B.P. 8106, Agadir, Morocco;3. Faculdade de Engenharia, Departamento de Engenharia Química, Universidade do Porto, Rua Roberto Frias, 4200-465 Porto, Portugal;1. State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing 100029, China;2. Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China |
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| Abstract: | One-dimensional tungsten oxide (WO3) gas sensing materials have been widely used for the detection of trimethylamine (TMA) gas. Furthermore, it is believed that an effective method to improve the gas sensing performance is to introduce noble metals into sensing materials. In this work, a novel gas sensing material was prepared by decorating Au nanoparticles on WO3 nanorods. Based on field emission scanning electron microscopy (FESEM/EDS), X-ray diffraction (XRD), and transmission electron microscopy (TEM), the morphology and microstructure of as-prepared samples were characterized. Results show that Au nanoparticles with diameter of 13–15 nm are loaded on the surface of WO3 nanorods with length of about 1–2 µm and width of 50–80 nm. Gas sensing tests reveal that the Au@WO3 sensor has remarkably enhanced response to TMA gas compared with pure WO3 nanorods. In addition, and the gas sensing mechanism has been investigated based on the experimental results. The superior sensing features indicate the present Au@WO3 nanocomposites are promising for gas sensors, which can be used in the detection of the trimethylamine gas and this work provides insights and strategies for the fabrication of sensing materials. |
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| Keywords: | Au nanoparticles Nanocomposites Gas sensors Trimethylamine |
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