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Fei L, Wang M, Qiao M, Zhang Y, Wang A, Zhao Y, Liu J, Wang S, Guo X, Wang J, Bi J, Zhang P, Guo Z, Yue Y, Yuan J, Di Tommaso D, Li F, Ji Z. Comparative Investigation of the Microstructure of MgCl 2 Aqueous Solutions Using Different X-ray Scattering Sources, Raman Spectroscopy, and Atomistic Simulations. J Phys Chem B 2024; 128:208-221. [PMID: 38113228 DOI: 10.1021/acs.jpcb.3c05763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Aqueous solutions of magnesium chloride (MgCl2(aq)) are often used to test advances in the theory of electrolyte solutions because they are considered an ideal strong 2:1 electrolyte. However, there is evidence that some ion association occurs in these solutions, even at low concentrations. Even a small ion-pairing constant can have a significant impact on the chemical speciation of ions, so it is important to determine whether ion pairing actually occurs. In this study, MgCl2(aq) with concentrations ranging from 1 to 35% was studied using three methods: X-ray scattering (XRS) with the Shanghai Synchrotron Radiation Facility (SSRF) and silver-anode laboratory sources, Raman spectroscopy, and molecular dynamics (MD) simulations with the COMPASS-II and Madrid force fields. XRS results were analyzed in the framework of PDF theory to obtain the reduced structure function F(Q) and the reduced pair distribution function G(r). The F(Q) values from synchrotron radiation and laboratory sources both showed that the tetrahedral hydrogen bonds in bulk water were destroyed with the increased MgCl2 concentration. The results of G(r) indicated that the main peaks centered at 2.05 and 2.80 Å can be ascribed to the interactions of Mg-O and O-O, respectively. The peak at 3.10 Å is attributed to the combined effect of O-O and Cl-O. By comparing the structural information on MgCl2 solution obtained from the two light sources, it was found that both SSRF and silver-anode laboratory sources can reflect the above-mentioned structural information on MgCl2 solution. The radial distribution function (RDF) obtained from MD simulations of MgCl2 solutions assigned the peaks at 2.0, 2.8, and 3.2 Å to the Mg-O, O-O, and Cl-O interatomic pairs, respectively. The decrease in the O-O coordination number confirms that the hydrogen-bonding network of water is disrupted by increasing MgCl2 observed by X-ray scattering. The proportion of Mg-Cl contact ion pairs gradually increases with MgCl2 concentration as does the coordination number. Raman spectroscopy results show that the bond type changes from double donor double acceptor (DDAA) to single donor-single acceptor (DA) with increasing concentration, providing explicit details of the hydrogen-bond evolution in the aqueous solution.
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Affiliation(s)
- Liting Fei
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Meiling Wang
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Mengdan Qiao
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Yu Zhang
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Ao Wang
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
| | - Yingying Zhao
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Jie Liu
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Shizhao Wang
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Xiaofu Guo
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Jing Wang
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Jingtao Bi
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Panpan Zhang
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Zhiyuan Guo
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Yajun Yue
- China Spallation Neutron Source, Dongguan, Guangdong 523000, China
| | - Junsheng Yuan
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Devis Di Tommaso
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
- Digital Environment Research Institute, Queen Mary University of London, Empire House, 67-75 New Road, London E1 1HH, U.K
| | - Fei Li
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
| | - Zhiyong Ji
- Engineering Research Center of Seawater Utilization Technology of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Tianjin Key Laboratory of Intrinsically Safe Chemical Technology, Tianjin 300130, China
- Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300401, China
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Meng XZ, Li XR, Yan HJ, Zhang QH, Wu LK, Li F, Cao FH. Spectroscopic and Simulation Insights into the Corrosion Mechanism of Sulfite on Titanium. J Phys Chem B 2022; 126:9016-9025. [DOI: 10.1021/acs.jpcb.2c04885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xian-Ze Meng
- School of Materials, Sun Yat-sen University, Shenzhen518107, China
| | - Xin-Ran Li
- School of Materials, Sun Yat-sen University, Shenzhen518107, China
| | - Hao-Jie Yan
- School of Materials, Sun Yat-sen University, Shenzhen518107, China
| | - Qin-Hao Zhang
- School of Materials, Sun Yat-sen University, Shenzhen518107, China
| | - Lian-Kui Wu
- School of Materials, Sun Yat-sen University, Shenzhen518107, China
| | - Fei Li
- Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin300130, China
| | - Fa-He Cao
- School of Materials, Sun Yat-sen University, Shenzhen518107, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai519082, China
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