Ultrafast, trace-level detection of NH3 gas at room temperature using hexagonal-shaped ZnO nanoparticles grown by novel green synthesis technique
| Autor: | Avshish Kumar, Samina Husain, M.A. Majeed Khan, Abhishek Verma, V. K. Jain, Hrishikesh Dhasmana, Anshika Nagar, Utkarsh Tyagi |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Band gap chemistry.chemical_element Condensed Matter Physics Oxygen Spectral line Electronic Optical and Magnetic Materials Ion symbols.namesake Chemical state X-ray photoelectron spectroscopy chemistry Chemical engineering symbols Electrical and Electronic Engineering Raman spectroscopy Ultrashort pulse |
| Zdroj: | Physica B: Condensed Matter. 626:413595 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2021.413595 |
| Popis: | Herein, an ultrafast, sensor has been developed for trace-level detection of Ammonia (NH3) gas using hexagonal-shaped ZnO nanoparticles (NPs). The ZnO NPs were grown by low-cost eco-friendly green synthesis process and characterized by various techniques. The electron microscopic images reveal the synthesis of uniform, highly dense and hexagonal-shaped ZnO NPs. The UV–Vis spectra illustrate a band gap of 3.89eV. XRD, XPS and Raman studies explain the high-quality hexagonal wurtzite-structure of ZnO NPs showing presence of electronic/chemical states of ions. The NH3 gas sensing properties of ZnO NPs were evaluated at different concentrations. The sensor exhibited an excellent response value of 2.5 at 5 ppm NH3 wherein quick response time was 5 s and fastest recovery time was 8 s. The sensing results could be attributed to the optimum number of oxygen species and active sites which are responsible for enhanced performance of the developed ZnO NPs based sensor. |
| Databáze: | OpenAIRE |
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