A highly sensitive, selective and room temperature operatable formaldehyde gas sensor using chemiresistive g-C3N4/ZnO
| Autor: | Selvan Nehru, Siva Kalaiselvam, Selvakumar Veeralakshmi, S. P. Subin David |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Indoor air Fermi level Formaldehyde Analytical chemistry Linearity Heterojunction 02 engineering and technology Repeatability 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Highly sensitive chemistry.chemical_compound symbols.namesake chemistry Chemistry (miscellaneous) symbols General Materials Science 0210 nano-technology Selectivity |
| Zdroj: | Materials Advances. 1:2781-2788 |
| ISSN: | 2633-5409 |
| DOI: | 10.1039/d0ma00529k |
| Popis: | Formaldehyde is a common indoor air pollutant whose level has to be monitored by an economic and efficient technique. Here, we report a room temperature operatable g-C3N4/ZnO-based formaldehyde gas sensor, showing higher relative sensor response (95.9%) as well as faster response/recovery time (30 s/70 s) at 50 ppm with good linearity, repeatability, selectivity and stability. Further, g-C3N4/ZnO shows that the superior performance of HCHO gas sensing compared to both pure g-C3N4 and ZnO may be due to the creation of n-n heterojunctions, which achieved the Fermi level equalization and cooperative enhancement of pure components. Thus, the optimization of structure and composition of the present g-C3N4/ZnO will offer a promising room-temperature operatable formaldehyde gas sensor in near future. |
| Databáze: | OpenAIRE |
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