Facile and Rapid Preparation of ZnO Nanomaterials with Different Morphologies and Superficial Structures for Enhanced Ethanol-Sensing Performances
| Autor: | Hong-Yu Chu, Xiao-Hong Yi, Chong-Chen Wang, Xiangjie Li, Huifen Fu, Xiao-Xu Song |
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| Rok vydání: | 2018 |
| Předmět: |
Ethanol
Polymers and Plastics Nucleation chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen 0104 chemical sciences Nanomaterials chemistry.chemical_compound Adsorption chemistry Chemical engineering Specific surface area Reagent Materials Chemistry Hexamethylenetetramine 0210 nano-technology |
| Zdroj: | Journal of Inorganic and Organometallic Polymers and Materials. 29:33-40 |
| ISSN: | 1574-1451 1574-1443 |
| DOI: | 10.1007/s10904-018-0961-1 |
| Popis: | A facile, rapid and environmental-friendly method was developed to prepare ZnO with different morphologies and superficial structures just using Zn(NO3)2 and hexamethylenetetramine (HMTA) as precursors by tuning nucleation rate. Rod-like ZnO-1 and ZnO-5, and irregular ZnO-10 and ZnO-20 were obtained as the amounts of the used reagents are 1, 5, 10 and 20 mmol, respectively. Compared to ZnO-1, the responses of ZnO-5, ZnO-10 and ZnO-20 toward ethanol were improved greatly, which could be attributed to their alternative active adsorbed oxygen species (O2−/O− for ZnO-5, ZnO-10 and ZnO-20, O2− for ZnO-1). It was proposed that the different active adsorbed oxygen species might result from the different activation of ethanol with the aid of ZnO. The response of ZnO-10 toward 50 ppm ethanol is 115, about five times higher than that of ZnO-1, and the best gas-sensing performance of ZnO-10 was deemed to result from its largest specific surface area and highest percentage of adsorbed oxygen. |
| Databáze: | OpenAIRE |
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