Enhanced formaldehyde detection based on Ni doping of SnO 2 nanoparticles by one-step synthesis
| Autor: | Zhi Yang, Yutong Han, Yafei Zhang, Yanjie Wang, Zhihua Zhou, Nantao Hu, Yanjie Su, Tao Wang, Jun Hu, Da Huang, Guili He |
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| Rok vydání: | 2018 |
| Předmět: |
Detection limit
Materials science Sensing applications Doping Metals and Alloys Formaldehyde Nanoparticle One-Step 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Chemical engineering chemistry Materials Chemistry Electrical and Electronic Engineering 0210 nano-technology Selectivity Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 263:120-128 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2018.02.035 |
| Popis: | In this work, SnO2 nanoparticles with Ni doping were synthesized via a facile one-step hydrothermal route. The addition of Ni to SnO2 lead to significant enhanced response to formaldehyde (HCHO). The Ni-doped SnO2 materials were used to fabricate HCHO gas sensors and the comprehensive HCHO-sensing properties under diverse working temperatures were tested and studied. With suitable Ni concentration, the SnO2 nanoparticles exhibited a 10 times sensing enhancement with high gas response, excellent selectivity and good stability. Furthermore, the limit of detection (LOD) was experimentally figured out to be as low as 120 ppb, which is much lower than the threshold exposure limit of HCHO proposed by American Conference of Governmental Industrial Hygienists. Importantly, the excellent performances of the as-fabricated gas-sensing devices make Ni-doped SnO2 a promising candidate for HCHO sensing applications. This synthesis strategy here can also give guidance for designing high-performance HCHO gas sensors. |
| Databáze: | OpenAIRE |
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