Using Raman spectroscopy to identify spectral features of and detect hydrogen peroxide-potential application for Mars exploration,Journal of Raman Spectroscopy

当前位置： X-MOL 学术 › J. Raman Spectrosc. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Using Raman spectroscopy to identify spectral features of and detect hydrogen peroxide-potential application for Mars exploration
Journal of Raman Spectroscopy ( IF 2.4 ) Pub Date : 2021-08-17 , DOI: 10.1002/jrs.6227
Xiaoling Ye ₁ , Minliang Zhang ₁ , Zhongchen Wu ₁ , Ling Xu ₁ , Lei Zhang ₁ , Jiayi Chen ₁

Affiliation

The Martian surface is oxidizing. An important oxidant, H₂O₂ (hydrogen peroxide), has been detected in the Martian atmosphere and is supported even below the Martian surface. H₂O₂ is an important target that can be used to better understand the Martian surface environment and explore extraterrestrial life and thus must be accurately detected and analyzed under Martian-relevant temperature conditions. In this study, the Raman spectral features and the limit of detection (LOD) of H₂O₂ were investigated for aqueous solutions and mud mixtures. The low-temperature spectral features and UV decomposition characteristics of H₂O₂ were also investigated because low temperatures and UV radiation are key environmental factors that can affect the existence of H₂O₂ on the Martian surface. Our results show that H₂O₂ has a remarkable Raman peak at 877 cm⁻¹, which is distinguishable from H₂O and other mixed minerals, making it easy to detect with an LOD of 400 ± 50 ppm in an H₂O₂ solution and 1666 ± 450 ppm in a kaolinite matrix (2000 ± 500 ppm in a gypsum matrix). There was no peak shift and only a certain degree of reduction in intensity for this peak in a H₂O₂ solution under low temperature, even for frozen H₂O₂. Split peaks at ~228 cm⁻¹ appeared after freezing H₂O₂, whereas there was no discernable split in the peak at ~3326 cm⁻¹ below −60°C; however, the H₂O peaks were splitted. The spectral features facilitate the detection and identification of H₂O₂ on the Martian surface. In light of the Mars2020 and ExoMars rover missions, our study provides valuable information about the Raman detection of H₂O₂ on Mars.

中文翻译：

使用拉曼光谱识别和检测过氧化氢电位在火星探测中的应用

火星表面正在氧化。一种重要的氧化剂，H ₂ O ₂（过氧化氢），已在火星大气中检测到，甚至在火星表面以下也得到支持。H ₂ O ₂是一个重要的目标，可用于更好地了解火星表面环境和探索地外生命，因此必须在火星相关温度条件下进行准确检测和分析。在这项研究中，研究了水溶液和泥浆混合物的拉曼光谱特征和 H ₂ O _{2的检测限 (LOD)。}_{H 2} O ₂的低温光谱特征和紫外分解特征还研究了低温和紫外线辐射是影响火星表面H ₂ O _{2存在的关键环境因素。}我们的结果表明，H ₂ O _{2在 877 cm}^-1处具有显着的拉曼峰，与 H _{2 O 和其他混合矿物有明显区别，因此在 H}₂ O ₂中以 400 ± 50 ppm 的 LOD 很容易检测溶液和 1666 ± 450 ppm 在高岭石基质中（2000 ± 500 ppm 在石膏基质中）。在低温下，在 H ₂ O _{2溶液中，即使对于冷冻的 H}₂ O ₂。_{冷冻H 2} O ₂后在~228 cm ^-1出现分裂峰，而在-60℃以下~3326 cm ^-1峰没有明显分裂；然而，H ₂ O 峰被分裂。光谱特征有助于对火星表面H ₂ O _{2的检测和识别。}鉴于 Mars2020 和 ExoMars 漫游者任务，我们的研究提供了有关火星上H ₂ O _{2的拉曼探测的宝贵信息。}

更新日期：2021-08-17

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11