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Highly Sensitive and Exceptionally Wide Dynamic Range Detection of Ammonia Gas by Indium Hexacyanoferrate Nanoparticles Using FTIR Spectroscopy
Analytical Chemistry ( IF 7.4 ) Pub Date : 2018-03-20 00:00:00 , DOI: 10.1021/acs.analchem.8b00359
Supone Manakasettharn 1, 2 , Akira Takahashi 1 , Tohru Kawamoto 1 , Keiko Noda 1 , Yutaka Sugiyama 1 , Tohru Nakamura 1
Affiliation  

Ammonia gas is useful but caustic; thus, its concentration is monitored depending on applications. We prepared indium hexacyanoferrate nanoparticles (InHCF-NPs, HCF = [FeII(CN)6]4–) with average diameter around 8 nm by simple reaction at room temperature between In cations and HCF anions, and we found the unique functionality of InHCF-NPs which were capable of highly sensitive (16 ppb) and exceptionally wide range (190000, 16 ppb −0.3%) detection of ammonia gas within 6 min by IR measurements. Slope changes of the IR peak ratio of adsorbed ammonium over CN moieties in the InHCF framework indicated a good log–log linear correlation along gas concentrations, in which a wide dynamic range over 105 was realized for the first time in the field of ammonia gas detection.

中文翻译:

十六烷基高铁酸铟纳米粒子的FTIR光谱法用于氨气的高灵敏和超宽动态范围检测

氨气是有用的,但具有腐蚀性。因此,根据应用情况对其浓度进行监控。我们通过室温下In阳离子和HCF阴离子之间的简单反应,制备了平均直径约8 nm的六氰合铁酸铟纳米颗粒(InHCF-NPs,HCF = [Fe II(CN)6 ] 4–),我们发现InHCF的独特功能-能够通过IR测量在6分钟内高度灵敏(16 ppb)且异常范围很广(190000,16 ppb -0.3%)的氨气-NP。在InHCF框架中,吸附的铵离子对CN部分的IR峰值比率的斜率变化表明,沿气体浓度具有良好的log-log线性相关性,其中动态范围超过10 5 是在氨气检测领域首次实现的。
更新日期:2018-03-20
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