Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Efficient NH3 Detection Based on MOS Sensors Coupled with Catalytic Conversion.
ACS Sensors ( IF 8.2 ) Pub Date : 2020-05-24 , DOI: 10.1021/acssensors.0c00836 Boxuan Yang 1 , Xian Li 2 , Wenjing Yuan 3 , Zhemin Li 2 , Ning Lu 1 , Shaohua Wang 1 , Yi Wu 1 , Shurui Fan 1 , Zhongqiu Hua 1
ACS Sensors ( IF 8.2 ) Pub Date : 2020-05-24 , DOI: 10.1021/acssensors.0c00836 Boxuan Yang 1 , Xian Li 2 , Wenjing Yuan 3 , Zhemin Li 2 , Ning Lu 1 , Shaohua Wang 1 , Yi Wu 1 , Shurui Fan 1 , Zhongqiu Hua 1
Affiliation
|
A solution of NH3 detection based on catalytic conversion of NH3 into NOx was proposed by using MOS gas detectors and Pt-supported catalysts. The catalysts convert NH3 into NOx, which is a very sensitive analyte for MOS detectors. Catalysts based on Pt-loaded HZSM-5 and Al2O3 were prepared by wet impregnation. MOS detectors were fabricated from nanosized In2O3 and WO3 using screen-printing techniques. As expected, MOS sensors based on In2O3 and WO3 have an extremely high sensitivity to NO2; nevertheless, they have a relatively low response to NH3 and a large cross-sensitivity to typical interfering gases such as CO and ethanol. By the present solution, MOS sensors could very sensitively respond to NH3, even down to 0.25 ppm. In addition, it was also found that the catalysis also combusts the reducing gases into CO2 and water and consequently significantly improves the selectivity of NH3. Lastly, we would to like to stress that the proposed concept of the catalytic conversion method suggests the potential utility for broader measurements by using different catalysts and gas detectors and that only a part of the usage for NH3 was presented here.
中文翻译：
基于MOS传感器和催化转化的高效NH3检测
提出了一种利用MOS气体检测仪和Pt负载型催化剂，将NH 3催化转化为NO x的NH 3检测解决方案。催化剂将NH 3转化为NO x，这对于MOS检测器来说是非常敏感的分析物。通过湿浸渍制备了基于Pt负载的HZSM-5和Al 2 O 3的催化剂。MOS检测器是使用丝网印刷技术由纳米In 2 O 3和WO 3制成的。不出所料，基于In 2 O 3和WO 3的MOS传感器对NO 2的灵敏度极高; 但是，它们对NH 3的响应相对较低，并且对典型的干扰气体（如CO和乙醇）具有较大的交叉敏感性。通过本解决方案，MOS传感器可以非常敏感地响应NH 3，甚至低至0.25 ppm。此外，还发现，催化作用还将还原性气体燃烧成CO 2和水，因此显着提高了NH 3的选择性。最后，我们想强调的是，所提出的催化转化方法的概念暗示了通过使用不同的催化剂和气体检测器来进行更广泛的测量的潜在效用，此处仅介绍了NH 3的部分用途。
更新日期：2020-06-26
中文翻译：
基于MOS传感器和催化转化的高效NH3检测
提出了一种利用MOS气体检测仪和Pt负载型催化剂，将NH 3催化转化为NO x的NH 3检测解决方案。催化剂将NH 3转化为NO x，这对于MOS检测器来说是非常敏感的分析物。通过湿浸渍制备了基于Pt负载的HZSM-5和Al 2 O 3的催化剂。MOS检测器是使用丝网印刷技术由纳米In 2 O 3和WO 3制成的。不出所料，基于In 2 O 3和WO 3的MOS传感器对NO 2的灵敏度极高; 但是，它们对NH 3的响应相对较低，并且对典型的干扰气体（如CO和乙醇）具有较大的交叉敏感性。通过本解决方案，MOS传感器可以非常敏感地响应NH 3，甚至低至0.25 ppm。此外，还发现，催化作用还将还原性气体燃烧成CO 2和水，因此显着提高了NH 3的选择性。最后，我们想强调的是，所提出的催化转化方法的概念暗示了通过使用不同的催化剂和气体检测器来进行更广泛的测量的潜在效用，此处仅介绍了NH 3的部分用途。
京公网安备 11010802027423号