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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Raman Spectroscopy of the Reaction of Sodium Chloride with Nitric Acid: Sodium Nitrate Growth and Effect of Water Exposure
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Raman Spectroscopy of the Reaction of Sodium Chloride with Nitric Acid: Sodium Nitrate Growth and Effect of Water Exposure

机译：氯化钠与硝酸反应的拉曼光谱：硝酸钠的生长和水分的影响

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摘要

The reaction of powdered NaCI with HNO_3 was studied using Raman spectroscopy. NaNO_3 growth was monitored as a function of HNO_3 exposure in a flow cell. Mode-specific changes in the NO_3- vibrational mode intensities with HNO_3 exposure suggest a rearrangement of the NaNO_3 film with coverage. In the absence of H_2O, intensities of NaNO_3 bands increase with HNO_3 exposure until a capping layer of NaNO_3 forms. The capping layer prevents subsequent HNO_3 from reacting with the underlying NaCI. H_2O exposl,1fe of NaNO_3-capped NaCI results in hydration of the surface to form an aqueous solution containing NaNO_3 and NaCI. Further exposure results in the formation of a thicker surface-adsorbed H_2O layer that is consistent with an aqueous NaNO_3 and NaCI solutjon. Upon exposure of hydrated NaCI to HNO_3. molecular HNO_3 and solid-state NaNO_3 are observed in the thin H_2O film.
机译：用拉曼光谱研究了粉状氯化钠与HNO_3的反应。 NaNO_3的生长作为流动池中HNO_3暴露的函数进行监测。暴露于HNO_3时，NO_3-振动模式强度的模式特定变化表明NaNO_3膜的覆盖范围发生了重新排列。在没有H_2O的情况下，NaNO_3谱带的强度随HNO_3的暴露而增加，直到形成NaNO_3的覆盖层。覆盖层防止随后的HNO_3与下面的NaCl反应。 NaNO 3封端的NaCl的H_2O暴露导致表面水化，形成含有NaNO_3和NaCl的水溶液。进一步的暴露导致形成更厚的表面吸附H_2O层，这与NaNO_3和NaCl水溶液相一致。在将水合NaCl暴露于HNO_3时。在H_2O薄膜中观察到分子HNO_3和固态NaNO_3。

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