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Potassium Hydroxide Concentration-Dependent Water Structure on the Quartz Surface Studied by Combining Sum-Frequency Generation (SFG) Spectroscopy and Molecular Simulations
Lyu, Yeqing1; Wang, Yaru1,2; Wang, Shaona1; Liu, Biao1; Du, Hao1,2
2019-09-10
Source PublicationLANGMUIR
ISSN0743-7463
Volume35Issue:36Pages:11651-11661
AbstractVibrational sum-frequency generation (SFG) spectroscopy and molecular simulations were used to investigate the molecular structures at the quartz surface, and the influence of bulk potassium hydroxide concentration was systematically examined. It was found that when the potassium hydroxide concentration was less than 10(-2) M, the structure of water molecules at the quartz surface was dependent on the quartz surface potential as evidenced by the increase of SFG signal as a function of the alkaline concentration. However, when the alkaline concentration was more than 10( )(-2)M, a monotonic decrease of interfacial water SFG spectra intensity was observed, which has been proposed to be due to the decreased number of interfacial water molecules and proton disordering caused by the screening effect originated from the adsorption of cations. Furthermore, besides the typical hydrogen-bonded interfacial water peaks (3200 and 3400 cm(-1)), the quartz/H2O interface showed an additional red-shifted peak centered at similar to 2930 cm(-1). The results of SFG spectra and chemistry calculations confirmed that the red-shifted vibrational peak was due to the O-H stretch vibration of water molecules strongly hydrogen bonded with the OH- adsorbed at the surface.
DOI10.1021/acs.langmuir.9b01781
Language英语
WOS KeywordHYDROGEN-PEROXIDE MOLECULES ; VIBRATIONAL-SPECTRA ; SILICA ; INTERFACE ; ADSORPTION ; DYNAMICS ; RANGE ; PH ; IONS
Funding ProjectNational Natural Science Foundation of China[91634111] ; National Natural Science Foundation of China[51774261] ; Sino-German Collaboration Project[51761135108]
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; Sino-German Collaboration Project
WOS IDWOS:000485831500005
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30862
Collection中国科学院过程工程研究所
Corresponding AuthorDu, Hao
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Lyu, Yeqing,Wang, Yaru,Wang, Shaona,et al. Potassium Hydroxide Concentration-Dependent Water Structure on the Quartz Surface Studied by Combining Sum-Frequency Generation (SFG) Spectroscopy and Molecular Simulations[J]. LANGMUIR,2019,35(36):11651-11661.
APA Lyu, Yeqing,Wang, Yaru,Wang, Shaona,Liu, Biao,&Du, Hao.(2019).Potassium Hydroxide Concentration-Dependent Water Structure on the Quartz Surface Studied by Combining Sum-Frequency Generation (SFG) Spectroscopy and Molecular Simulations.LANGMUIR,35(36),11651-11661.
MLA Lyu, Yeqing,et al."Potassium Hydroxide Concentration-Dependent Water Structure on the Quartz Surface Studied by Combining Sum-Frequency Generation (SFG) Spectroscopy and Molecular Simulations".LANGMUIR 35.36(2019):11651-11661.
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