Synthesis and formaldehyde sensing performance of LaFeO3 hollow nanospheres |
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| Affiliation: | 1. Crystal Growth Centre, Anna University, Chennai 600025, India;2. Centre for Nanoscience and Technology, Anna University, Chennai 600025, India;3. Department of Physics, Arignar Anna College (Arts and Science), Krishnagiri 635001, India;1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;2. Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, China;1. State Key Laboratory on Integrated Optoelectronics and College of Electronic Science & Engineering, Jilin University, Changchun 130012, PR China;2. State Key Laboratory on Applied Optics, Changchun 130023, PR China;3. Global Energy Interconnection Research Institute, Beijing 102211, PR China;1. Institute of Physical and Theoretical Chemistry (IPTC), University of Tuebingen, Auf der Morgenstelle 15, D-72076, Tuebingen, Germany;2. King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086, Riyadh, 11442, Saudi Arabia |
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| Abstract: | 
Metal oxide semiconductors with hollow structure and morphology have attracted considerable attentions because of their promising application on gas sensors. In this paper, LaFeO3 hollow nanospheres have been prepared by using carbon spheres as templates in combination with calcination. Based on the observation of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and transmission electron microscope (TEM), the structure and morphology of the products were characterized. It has been revealed that as-prepared LaFeO3 samples have a uniform diameter of around 300 nm and hollow structures with thin shells of about 30 nm consisting of numerous nanocrystals and nanopores. Owing to the hollow and porous structure, large surface area and more surface active sites, the sensor based on LaFeO3 hollow nanospheres exhibited high response, good selectivity and stability to formaldehyde gas (HCHO). It suggests that the as-prepared LaFeO3 hollow nanospheres are promising candidates for good performance formaldehyde sensor. |
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| Keywords: | Hollow nanospheres Template Formaldehyde Gas sensor |
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