Umar Ahmad, Khan M Ajmal, Kumar Rajesh, Algarni H
Department of Chemistry, College of Science and Arts, Najran University, P.O. Box 1988, Najran-11001, Kingdom of Saudi Arabia.
Department of Physics, Faculty of Science, King Khalid University, P.O. Box-9004, Abha-61413, Saudi Arabia.
J Nanosci Nanotechnol. 2018 May 1;18(5):3557-3562. doi: 10.1166/jnn.2018.14651.
Herein, we report the synthesis, characterization and ethanol gas sensing application of Ag-doped ZnO nanoparticles. The nanoparticles were synthesized through a facile hydrothermal process and characterized through various characterization techniques. The detailed characterizations confirmed that the synthesized Ag-doped ZnO nanoparticles are grown in high density with an average diameter of ~20 ± 5 nm, possessing well-crystalline wurtzite hexagonal crystal structure and exhibiting good optical properties. The as-synthesized Ag-doped ZnO nanoparticles were further used as functional material to fabricate efficient ethanol gas sensor which exhibited excellent gas response. The detailed gas sensing experiments revealed that at an optimized temperature, i.e., 320 °C, the recorded gas response was 32.815 for 200 ppm concentration of ethanol gas. Finally, a plausible gas sensing mechanism was also presented in this paper.
在此，我们报道了银掺杂氧化锌纳米颗粒的合成、表征及其乙醇气敏应用。通过简便的水热法合成了纳米颗粒，并采用各种表征技术对其进行了表征。详细表征证实，合成的银掺杂氧化锌纳米颗粒高密度生长，平均直径约为20±5nm，具有结晶良好的纤锌矿六方晶体结构，并表现出良好的光学性能。所合成的银掺杂氧化锌纳米颗粒进一步用作功能材料，制备出具有优异气敏性能的高效乙醇气体传感器。详细的气敏实验表明，在优化温度即320℃下，对于浓度为200ppm的乙醇气体，记录到的气敏响应为32.815。最后，本文还提出了一种合理的气敏机理。
