JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
·
2020
·Vol. 53
·期 5
·183-189
·
IF 0.651
Chao Ye,Yun-Yun Gao,Shi-Hua Sang,Pei-Huan Jiang,Qi Ge
The phase equilibria of the KBr–SrBr2–H2O and NaBr–SrBr2–H2O ternary systems at 308 K were measured using the isothermal dissolution equilibrium method. The compositions of the liquid and solid phases were expressed as the mass fraction, and the phase diagrams constructed from the experimental data show that both ternary systems are simple co-saturated types with only one invariant point, two univariant curves, and two crystallization regions. Neither of the two ternary systems forms a double-salt or solid solution. The solid-phase crystallization regions of the KBr–SrBr2–H2O ternary system correspond to KBr and SrBr2·6H2O, and the invariant point of the NaBr–SrBr2–H2O ternary system is saturated with NaBr·2H2O and SrBr2·6H2O. From the phase diagrams, the salting-out effect of SrBr2 on KBr is clear, which indicates that the solubility of KBr is lower and it is easier to separate KBr from solution in the ternary KBr–SrBr2–H2O system at 308 K.
研究领域:
化学热力学
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无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Pei-Huan Jiang,Chun-Xia He,Shi-Hua Sang,Xing-Liu,Lan-Rong Zhao
The solid–liquid equilibria in the ternary system LiBr–SrBr2–H2O at 273.15, 308.15, and 323.15 K were studied by isothermal dissolution equilibrium method in this work. At three different temperatures, the ternary system LiBr–SrBr2–H2O belongs to hydrate type I saturation. The phase diagram at 273.15 K includes one cosaturation point, two univariant curves, and two crystallization zones corresponding to LiBr·2H2O and SrBr2·6H2O. The other two phase diagrams contain two cosaturation points, three univariant curves, and three crystallization fields corresponding to LiBr·2H2O, SrBr2·2H2O, and SrBr2·6H2O at 308.15 K and LiBr·H2O, SrBr2·2H2O, and SrBr2·6H2O at 323.15 K, respectively. Lithium bromide has an obvious salting-out effect on strontium bromide. The crystallization area of lithium bromide hydrate is the smallest, and lithium bromide is difficult to crystallize out of the solution at different temperatures.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Huiren Zheng,Jize Wang,Junye Pan,Chunyang Zheng,Yuxin Zhang,Ankang Shu,Bin Li,Shaowen Cao,Yong Peng
Underwater photovoltaics plays a pivotal role in photovoltaic applications. However, the underwater solar spectrum differs significantly from that in air, and as water depth increases, solar spectra across various wavebands exhibit distinct attenuation rates. Specifically, the attenuation rate of the red component of sunlight is considerably higher than that of green and blue light (400–600 nm). Thus, under these unique spectral conditions, there is an urgent need to develop stable devices that minimize power conversion efficiency (PCE) loss with increasing water depth. The 4-terminal (4T) structure tandem cell, designed with 2.35 eV CsPbBr3 and 1.63 eV Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3, is prioritized due to its suitable optical response range and low PCE loss with increasing water depth. As CsPbBr3 utilized blue and green light in tandem, which has the highest light intensity underneath water, this study employed doping of SrBr2 into the CsPbBr3 film. This approach reduced the defect density of the film, enhanced carrier transport efficiency, and improved the photoelectric responsivity of the device in the 425–500 nm band. The CsPbBr3 perovskite solar cells that were fabricated demonstrated a high open-circuit voltage of 1.46 V and an exceptional PCE of 7.62%. Additionally, these devices exhibited excellent stability. Consequently, the 4T tandem device achieved PCEs of 15.28, 11.79, and 10.33% at 0, 0.5, and 0.7 m underwater depths respectively, with a variation rate of only 32%. Furthermore, the device demonstrated remarkable stability under working conditions, with an efficiency decay of less than 13% after continuous irradiation for 30 days. These findings suggest that the 4T tandem solar cell holds considerable potential for application in underwater photovoltaics.
研究领域:
材料科学
·
能源技术
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Xiao-Feng Guo,Shi-Hua Sang,Chao Ye
The underground brines in the Sichuan basin of China are rich in many valuable components, such as Li+, K+, Sr2+, Br–, and others. In view of comprehensive utilization of the underground brines, the stable solid–liquid equilibria of the quaternary systems LiBr–NaBr–KBr–H2O and LiBr–KBr–SrBr2–H2O at 308.15 K were measured by the isothermal dissolution equilibrium method. The results show that both phase diagrams of the quaternary systems listed above are hydrate-type. Both equilibrium phase diagrams are composed of two invariant points, five univariant curves and four crystallization fields. The equilibrium solid phases in the first quaternary system are LiBr·2H2O, NaBr·2H2O, NaBr, and KBr, respectively, and those in the second quaternary system are LiBr·2H2O, SrBr2·6H2O, SrBr2·2H2O, and KBr. In both phase diagrams, the crystallization field of KBr is the largest, while that of LiBr·2H2O is the smallest. The results indicate that KBr is the easiest to be separated from the saturated solution in the two quaternary systems. Furthermore, the comparison of phase equilibria of the quaternary systems and its ternary subsystems at different temperatures is presented and discussed in detail.
研究领域:
化学工程
·
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Xing-Xing Zeng,Shi-Hua Sang,Xiao-Yun Qi,Xiao-Feng Guo,Rui-Zhi Cui
Aiming at the composition of underground brines in the Sichuan Basin of China, stable phase equilibria in quaternary systems LiBr–NaBr–SrBr2–H2O and LiBr–KBr–SrBr2–H2O at 288.15 K are studied using the isothermal dissolution equilibrium method. The solubilities of salts in the quaternary systems listed above are measured, and the corresponding equilibrium solid phases are identified using X-ray powder diffraction. As a result, the corresponding phase diagrams of the two quaternary systems are plotted, respectively. In the two stable phase diagrams, there is no solid solution or complex salt at 288.15 K. For the quaternary system LiBr–NaBr–SrBr2–H2O, there are two invariant points, five univariate curves, and four solid crystallization regions, which are LiBr·2H2O, NaBr, NaBr·2H2O, and SrBr2·6H2O, respectively, of which LiBr·2H2O has the smallest crystallization field, indicating that its solubility is the largest and it is the hardest to be precipitated from the saturated solution. There are one invariant point, three univariate curves, and three solid crystallization fields, corresponding to LiBr·2H2O, KBr, and SrBr2·6H2O in the quaternary system LiBr–KBr–SrBr2–H2O, respectively. The experimental results show that the solubilities of salts KBr, NaBr, and SrBr2 in the saturated solution decrease with the increasing concentration of LiBr, which indicates that LiBr has a strong salting out effect on KBr, NaBr, and SrBr2 in the solution.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2026
·
IF 1.3
Nie Guoliang,Cui Ruizhi,Ren Hongbao,Sang Shihua,Yang Qiuye,Li Wu
The underground brines in Sichuan Basin contain abundant major elements (e.g., Na, K, Mg, Ca, Cl) and high-value trace elements such as Li, Sr and Br, representing significant exploitable resources. Comprehensive investigation of their physicochemical properties is crucial for integrated resource development. This study systematically examined the phase equilibrium behavior of the quinary system NaBr–KBr–CaBr 2 –SrBr 2 –H 2 O and its quaternary subsystem NaBr–CaBr 2 –SrBr 2 –H 2 O at 298.15 K using the isothermal dissolution equilibrium method. The ionic compositions of saturated solutions and corresponding equilibrium solid phases were experimentally determined, enabling construction of complete solid–liquid equilibrium phase diagrams at 298.15 K. Thermodynamic modeling was performed using the Pitzer model with ion-interaction parameters obtained from the literature. Results demonstrate agreement between predicted and experimental solubility values, with close correspondence between calculated and experimental phase boundaries, confirming the model’s applicability. This work provides the first fundamental phase equilibrium dataset for K/Ca/Sr/Br-containing poly-component systems of Sichuan Basin brines.
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2018
·
IF 4.513
Dan Li,Lingzong Meng,Tianlong Deng,Yafei Guo,Yu Pan
The solubilities and refractive indices of the NaBr–SrBr 2 –H 2 O and KBr–SrBr 2 –H 2 O systems at 288.15 K were investigated with the isothermal dissolution method. The phase diagrams and refractive index diagrams were plotted for the two systems at 288.15 K. The phase diagrams consist of one two-salt cosaturated invariant point , two univariant solubility isotherms, and two stable crystallization fields. The two systems belong to the simple eutectic type, and neither double salt nor solid solution was found. The refractive indices change regularly with the strontium bromide concentration increasing in solution, and reach the maximum value at the eutectic point. On the basis of Pitzer and Harvie-Weare (HW) model, the binary and mixing Pitzer parameters and solubility equilibrium constants of equilibrium solid salts for the two ternary systems at 288.15 K were acquired. And then, the solubilities for the ternary systems at 288.15 K were demonstrated. A comparison shows that the calculated solubilities agree well with the experimental data.
研究领域:
化学热力学
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溶液化学
·
相平衡
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无机化学
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热力学建模
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Chun-Tao Hu,Yun-Yun Gao,Shi-Hua Sang,Yu-Qiu Cen,Xiao-Feng Guo,Cheng Li
To efficiently exploit and utilize bromine-rich brine resources of China, solid–liquid phase equilibria of the quinary system NaBr–KBr–MgBr2–SrBr2–H2O (saturated with KBr) and the quaternary system NaBr–MgBr2–SrBr2–H2O at 308.2 K were studied in detail by the isothermal dissolution equilibrium method. The dry salt phase diagram of the quinary system NaBr–KBr–MgBr2–SrBr2–H2O (saturated with KBr) includes one invariant point, three isothermal dissolution curves, and three crystallization regions (NaBr·2H2O, KBr·MgBr2·6H2O, and SrBr2·6H2O) under the condition of KBr saturation. And the crystallization region of KBr·MgBr2·6H2O is the smallest, so KBr·MgBr2·6H2O is difficult to crystallize and precipitate. Similarly, The dry salt phase diagram of the quaternary system NaBr–MgBr2–SrBr2–H2O is composed of two invariant points, five isothermal solubility curves, and four crystallization fields, which are hydrate salts NaBr·2H2O, MgBr2·6H2O, and SrBr2·6H2O and anhydrous simple salt NaBr. The crystallization region of MgBr2·6H2O is the smallest, the solubility of magnesium bromide is the largest, and it is difficult to crystallize and precipitate in this saturated solution. Furthermore, the mixing ion-interaction parameter ΨNa, Sr, Br of Pitzer’s model is fitted, which can be used for the subsequent prediction of phase equilibria containing strontium system. In addition, the solubilities of salts in the quinary system and the quaternary subsystem were theoretically predicted, and the experimental value was compared with the calculated value. The calculated value was in good agreement with the experimental value.
研究领域:
化学工程
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Sitong Li,Zhuqing Li,Yu Chen,Hua Tian,Gequn Shu
Thermochemical energy storage (TCES) based on salt hydrate stands out as an important method for long-term energy storage. However, the low energy storage density (ESD) at low temperature and poor cycle stability of the materials limit the practical application. In this work, new composites for thermochemical heat storage at low temperature (about 100 °C) are synthesized, consisting of SrBr 2 and SrCl 2 with various mass ratios and expanded graphite (EG). The material properties are characterized and measured using scanning electron microscope (SEM), X-ray diffraction (XRD), thermal constant analyzer and simultaneous thermal analyzer (STA). The results demonstrate that the composites display excellent thermal conductivity, ESD and cycling performance. The composites exhibit an improvement in thermal conductivity by almost eightfold when compared with pure SrBr 2 . In comparison with SrCl 2 , the composites demonstrate a reduction in hydration time by approximately 3/5. The ESD of the composites at 100 °C surpasses 800 kJ kg −1 , and the ESD of SrBr5Cl5@EG reaches 918.66 kJ kg −1 , representing an 18.23 % enhancement compared with pure SrBr 2 . Furthermore, it is revealed that reducing the adsorption temperature, raising the heat source temperature and evaporation temperature are conducive to enhancing the heat storage performance of the composite. The cycling test results indicate that the SrBr5Cl5@EG composite retains 94.44 % of the initial ESD after 14 cycles, affirming its good stability. This work provides a new avenue for the development of advanced thermal energy storage materials and demonstrates great potential for long-term thermochemical energy storage applications at low temperature.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Yan Feng,Shi-Hua Sang,Kuang-Yi Zhu,Chun-Tao Hu,Xiao-Feng Guo,Xiao-Tian Tan
The studies of mean activity coefficients of the NaBr–SrBr2–H2O solutions are of great significance for the development of underground brines in the Sichuan Basin of China. In this article, the mean activity coefficients of NaBr in the NaBr–SrBr2–H2O solutions have been studied by the cell potential method. The range of the determined ionic strength fraction yb of SrBr2 is 0.0, 0.2, 0.4, 0.6, and 0.8, and the total ionic strength I ranges from 0.0100 to 1.0000 mol·kg–1. First, the cell potentials of NaBr in NaBr–H2O solutions and NaBr–SrBr2–H2O solutions are measured by composite ion-selective electrodes. Then, the mean activity coefficients of NaBr in mixed solutions were calculated by using the measured cell potential data and the Nernst equation. Consequently, the mixed ion interaction parameters θNa+,Sr2+ and φNa+,Sr2+,Br– of the Pitzer model at 308.2 K were fitted by a multiple linear regression method. Finally, the above parameters and the Pitzer model were used to calculate the mean activity coefficients of SrBr2 and relevant thermodynamic properties (osmotic coefficient Φ, water activity aw, and excess Gibbs free energy GE) in NaBr–SrBr2–H2O solutions. In addition, the solubilities of NaBr and SrBr2 in mixed solutions were predicted using the Pitzer model. The predicted theoretical values are in good agreement with the experimental values. The fitted mixed ion interaction parameters have good applicability for solubility prediction.
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Xue-ping Zhang,Wei Wang,Han-zhong Zhang,Shi-hua Sang
In this paper, the stable phase equilibrium data of the ternary system CaBr2-SrBr2-H2O at T = 273, 298, and 323 K and 101.3 kPa have been determined by isothermal the dissolution equilibrium method. The phase diagrams of them at the investigated temperatures have been drawn. It is found that the isothermal phase diagrams of the CaBr2–SrBr2–H2O system at T = 273, 298, and 323 K are classified as a simple co-saturation type consisting of an invariant point and two univariant curves. The equilibrium solid phases corresponding to an invariant point of the system were detected as CaBr2·6H2O + SrBr2·6H2O at 273 and 298 K and those identified as CaBr2·4H2O + SrBr2·6H2O at 323 K. In this system, calcium bromide exhibits a strong salting-out effect on strontium bromide. Furthermore, isothermal solubilities at three temperatures were compared and discussed.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Kaiyu Zhao,Yafei Guo,Dan Li,Lingzong Meng,Tianlong Deng
Isopiestic molalities and water activities for the commercial absorption refrigerants LiBr and SrBr 2 at 288.15 K were accurately measured using an improved isopiestic method. And the solubilities for the absorption refrigeration systems were determined by the isothermal dissolution equilibrium method, meanwhile, the refractive indices and densities were measured. The Pitzer and HW model was used to correlate the measured water activities and solubilities, simulate the thermodynamic properties and predict the data in the phase equilibrium process for the absorption refrigeration systems, and the predicted data agreed well with the experimental solubilities. On the basis of the Pitzer ion-interaction parameters and solubility product constant ( K sp ) obtained in this work, the ion-interactions between alkali metal ions with Sr 2+ and phase equilibrium behaviors were illustrated on the molecular level, which could give an essential guide for the designing of absorption refrigeration system.
研究领域:
化学工程
·
制冷技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）