JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
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IF 2.196
Dandan Gao,Dongdong Li,Wu Li
Solubility of RbCl(cr) and CsCl(cr) in pure water were determined at subzero temperatures. The solubility of RbCl(cr) and CsCl(cr) decreased with temperature increment. Specific heat capacity of RbCl(aq) and CsCl(aq) solutions were determined at 298.15 K and concentration to near saturation. The specific heat capacity of RbCl(aq) and CsCl(aq) solutions decreased with concentration increment and for the same molality the specific heat capacity of CsCl(aq) is smaller than that of RbCl(aq). A temperature dependent thermodynamic model based on the Pitzer-Simonson-Clegg activity coefficient equations was used to represent the activity, thermal and solid-liquid equilibria properties of RbCl + H 2 O and CsCl + H 2 O systems. The obtained models can reproduce and predict the thermodynamic properties and phase diagram of the two binary systems well for the temperature range from 200 K to 370 K. The present models have an advantage especially at subzero temperatures due to the utilization of low temperature solubility experimental data in parameterization.
研究领域:
物理化学
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热力学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2017
·
IF 2.323
Yunxue Gao,Shuni Li,Quanguo Zhai,Yucheng Jiang,Mancheng Hu
Complete phase diagrams and physico-chemical properties for the ternary system (CsCl + NaCl + H2O) were determined at T = (298.15, 308.15, and 318.15) K, respectively. The X-ray diffraction method and Schreinemaker’s wet residue method were used to verify the solid phase. The phase diagrams show this ternary system is a complex type. Three crystallization regions were found corresponding to the single salt NaCl, a compound CsCl·2NaCl·2H2O, and a solid solution series [Cs1–x(Na·H2O)x]Cl (x in [Cs1–x(Na·H2O)x]Cl changed from 0 to 0.43 (298.15 K), 0.39 (308.15 K), and 0.36 (318.15 K) at each temperature. With rising temperature, the crystallization area of NaCl increased, but CsCl·2NaCl·2H2O and [Cs1–x(Na·H2O)x]Cl decreased simultaneously. However, density and refractive index increased with increasing CsCl concentration.
研究领域:
化学
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物理化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2017
·
IF 2.323
Lijiang Guo,Yaxiao Wang,Lanying Tu,Jianqiang Li
Water activities of the CsCl–MgCl2–H2O ternary system and its sub-binary systems were elaborately measured by an isopiestic method at 298.15 K. The solubility of this ternary system at 298.15 K was also measured by two different methods, namely isothermal method and Flow-Cloud-Point method. The solubilities measured by the two different methods were consistent with each other. A Pitzer model was used to represent the thermodynamic properties and calculate the solubility isotherms for the CsCl–MgCl2–H2O ternary system at 298.15 K. Both the equal water activity lines and the solubility isotherms are calculated with parameters reported in literature. It was found that only the calculated equal water activity lines with the parameters reported by Scharge et al. are consistent with the experimental values of this work. However, all the calculated solubility isotherms deviated from the experimental data in this work. New set of ternary parameters were obtained by fitting the water activities and solubility data of this work. Using the new parameters, the calculated equal water activity lines and solubility isotherms agreed with experimental values measured in this work.
研究领域:
物理化学
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无机化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
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IF 2.196
Lijiang Guo,Lanying Tu,Yaxiao Wang,Jianqiang Li
Water activities in the ternary system CsCl–MgCl2–H2O and its sub-binary systems at 323.15 K were elaborately measured by an isopiestic method. Moreover, the solubility of the CsCl–MgCl2–H2O system at 323.15 K was also measured by the flow-cloud-point method. A Pitzer model was used to predict the measured water activity and solubility data. The binary parameters for the CsCl–H2O system at 323.15 K were obtained by fitting the measured water activities for this binary system. The calculated water activity and solubility isotherms for the CsCl–MgCl2–H2O system at 323.15 K, with binary parameters only, deviated from the experimental values. This means that it is insufficient with binary parameters only to predict the water activity and calculate the solubility isotherms of the CsCl–MgCl2–H2O system at 323.15 K. The calculated solubility isotherms with both binary and mixing parameters, obtained by fitting the measured water activity, also deviated from experimental values. A new set of reasonable ternary parameters for the CsCl–MgCl2–H2O system was obtained by fitting the measured water activity and solubility data of this work. The calculated solubility isotherms with these parameters agreed with experimental results.
研究领域:
化学
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物理化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
·
IF 2.369
Hongxia Li,Lijiang Guo
The solubility and phase diagram of the CsCl–MgCl2–H2O ternary system, at a relatively wide temperature range, are significantly important for the extraction of the cesium resources from salt lakes. The isothermal dissolve equilibrium (IDE) method was used to determine the solubility of this ternary system at T = 273.15, 308.15, and 348.15 K, which have not been reported yet. The measured results indicated that the equilibrium solid phases in this ternary system from T = 273.15 to 348.15 K are CsCl, double salt CsCl·MgCl2·6H2O, and MgCl2·6H2O, and correspondingly there are three crystal regions and two cosaturated points for these solid phases. The solubility of the salt increased with the increase of the temperature, and the double salt CsCl·MgCl2·6H2O and CsCl crystal regions also became larger with the increasing temperature. However, the crystal regions of the MgCl2·6H2O solid phase are not enlarged obviously. Based on the solubility and phase diagram of CsCl–MgCl2–H2O at different temperatures, the separation process of CsCl resources has been proposed.
研究领域:
化学
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Jinqiu Ma,Ziquan Wang,Dan Li,Lingzong Meng,Yafei Guo,Tianlong Deng,Shuaiqi Sun,Yong Ma
The solubilities in the ternary system KCl–CsCl–H2O at 348.15 K were studied with the isothermal dissolution equilibrium method. The phase diagram of the system at 348.15 K is composed of one invariant point, two unvariant curves, and two single-salt crystallizations for KCl and CsCl. A comparison of the diagrams of the system KCl–CsCl–H2O from 298.15 to 348.15 K shows that the solid solution forms at 298.15 K and disappears at 323.15 and 348.15 K. Combining Pitzer binary parameters of KCl and CsCl obtained from the literature and solubility data in the system CsCl–H2O, the temperature dependence equations for Pitzer mixing parameters (θK,Cs and φK,Cs,Cl) and dissolution equilibrium constants of CsCl were built on the basis of the Pitzer model. The model for the mixed system provides reasonable mineral solubility from 273.15 to 348.15 K. The assumption of no solid solution existence in the ternary system can be applied in parameter fitting and solubility calculation. The results on the phase diagrams and thermodynamic model of the system KCl–CsCl–H2O can supply basic thermodynamic data and theoretical references for CsCl separation from the brine containing KCl.
研究领域:
化学热力学
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无机化学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2019
·Vol. 166
·期 13
·D606
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IF 3.12
Kui Liu,Jiajia Sun,Liqi Zhu,Yuxue Sang,Weiqun Shi,Zhifang Chai,Biao Wang,Mingliang Kang
The aim of this work is to explore the electrodeposition of uranium in low-melting LiCl-KCl-CsCl eutectic. A variety of conventional electrochemical techniques, including cyclic voltammetry (CV), chronopotentiometry (CP), and chronoamperometry (CA), were employed to study the electrochemical and kinetic properties of uranium at different temperatures ranging from 573 to 872 K. First, the electrochemical behaviors and diffusion coefficients of uranium species in the melts were investigated and compared to the published results. The temperature significantly affects the cathodic current response of the U4+/U3+ couple within the low temperature range. Moreover, the nucleation mechanisms of uranium in the electrodeposition process were evaluated, and the results indicated that nucleation and growth tend to occur via the same instantaneous mode at all applied temperatures and overpotential ranges. Finally, metallic uranium was deposited by potentiostatic electrolysis at an overpotential of −100 mV vs. U3+/U at different temperatures, and their morphologies and compositions were characterized by SEM-EDS and XRD, respectively. The results show that from 573 to 773 K, uranium deposits evolve form one-dimensional needle-like to multidimensional dendritic structures. No dendrite-free uranium deposits were obtained in the CsCl-containing melts regardless of the temperature.
研究领域:
材料科学
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电化学
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核工程
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高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Chao-Jie Wang,Chen-Chen Guo,Le-Xi Zhang,Qi-Da Qiu,Quan-Wei Song,Yan-Yan Yin,Li-Jian Bie
Recently, lead-free halide perovskites have made outstanding achievements in gas/humidity sensors, yet their comprehensive performance still needs to be further optimized. Herein, CsCl@Cs 2 SnCl 6 composites with various CsCl contents were synthesized by in-situ pyrolysis of lead-free halide perovskite Cs 2 SnCl 6 micro-octahedra at different temperatures. After structural, morphological and optical characterization, CsCl@Cs 2 SnCl 6 composites were explored as humidity sensing materials for the first time. Compared with pristine and pyrolytic samples, Cs 2 SnCl 6 calcined at 300 °C (CSC-3) exhibited the best humidity sensing performance. The CSC-3 sensor has the characteristics of high response (1.6 × 10 5 ), small hysteresis (1.1 %), fast response speed (14 s) and good stability (30 d), enabling robust real-time touchless physiological humidity monitoring of human respiration and finger perspiration. In addition, the humidity sensing mechanism was discussed by complex impedance analysis, confirming the sensitization effect of CsCl on Cs 2 SnCl 6 perovskites. This study provides efficient CsCl@Cs 2 SnCl 6 composites for human body related humidity detection, moreover, gives new insights into electrolyte-sensitization strategy of lead-free halide perovskites for high-performance sensory devices.
研究领域:
材料科学
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传感技术
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生物医学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2022
·
IF 3.269
Zhan-Ping Qiao,Xin Chen,Qi-Chao Yang
Using an isothermal equilibrium method, the phase equilibrium of the ternary systems CsCl–CdCl 2 –H 2 O and CsBr–CdBr 2 –H 2 O were studied at T = 298.1 K. In the phase diagram of the system CsCl–CdCl 2 –H 2 O, the solid phases of CsCdCl 3 and Cs 2 CdCl 4 , besides CsCl and CdCl 2 ·2.5H 2 O, were discovered. The phase diagram of the system CsBr–CdBr 2 –H 2 O contains five crystallization fields for the solid phases CdBr 2 ·4H 2 O, CsCdBr 3 , Cs 5 Cd 2 Br 9 , Cs 3 CdBr 5 and CsBr. The new solid phases of CsCdCl 3 and CsCdBr 3 are congruently soluble, and Cs 2 CdCl 4 , Cs 5 Cd 2 Br 9 and Cs 3 CdBr 5 are incongruently soluble in the aqueous system. The experimental solubility data and phase diagram s for the ternary systems show more practical application for the obtained cadmium-based halide perovskite. The five new solid phase have been analyzed by X-ray diffraction and thermogravimetry/derivative thermogravimetry. By measuring the standard molar enthalpies of solution of the compounds, the standard molar enthalpies of formation of CsCdCl 3 , Cs 2 CdCl 4 , CsCdBr 3 , Cs 5 Cd 2 Br 9 , Cs 3 CdBr 5 were determined to be –(873.3 ± 0.7) kJ·mol −1 , –(1325.6 ± 0.9) kJ·mol −1 , –(742.8 ± 0.7) kJ·mol −1 , –(2710.0 ± 1.3) kJ·mol −1 and –(1558.1 ± 1.0) kJ·mol −1 , respectively.
研究领域:
物理化学
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材料科学
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热力学
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
·
IF 1.6
Ran Maobiao,Gou Xiaoliang,Wang Pingping,Chen Shunzhang,Shu Xiaoyan,Liu Yi,Zhang Shengdong,Lu Xirui
In this study, the pollucite solidified form was hydrothermally synthesized by metakaolin, non-radioactive CsCl, and NaOH to immobilize CsCl in the radioactive molten salt waste. At 200 °C, the immobilization ratio of Cs increased with the enhancement of reaction system alkalinity by NaOH, but it was also accompanied by the formation of sodalite. Excessive Si was adverse to the crystallization of the solidified form. In addition, the proportion of Cs in the solidified form was constrained by the substitution competition between Cs + and Na + , which was affected by reaction time. The nucleation and growth of pollucite mainly occurs from 2 to 4 h, and the CsCl immobilization ratio could reach 36.27 wt .% at 6 h. The thermal weight loss rate of the solidified form within 1000 °C was less than 4 wt .%, and the normalized leaching rate of Cs was 5.05 × 10 –5 g m −2 d −1 for 14 d, showing reliable thermal stability and chemical durability. Graphical abstract
研究领域:
材料科学
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环境科学
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高影响因子
ENERGY & FUELS
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2020
·
IF 3.421
Wanxian Cai,Yanqi Lv,Koucheng Chen,Zhaobin Zhang,Yuanzeng Jin,Xingfu Zhou
Recently, carbon-based all-inorganic perovskite solar cells (PSCs) caught the attention of photovoltaic researchers due to their remarkable stability. Herein, we report a carbon-based all-inorganic CsPbI2Br PSC using TiO2 nanorod arrays (TiO2 NRAs) as an electron transporting layer. The method of using TiO2 NRAs as an electron pathway has the advantage of increasing the electron–hole separation effectively and enables a thicker active perovskite layer to obtain a stronger absorbance. In addition, a water–alcohol soluble CsCl was used to modify the interface between TiO2 NRAs and the CsPbI2Br active layer to reduce interfacial recombination of charge carriers in the cells, and the CsCl interface-modified device showed a 10.6% increase in the open-circuit voltage. An optimized power conversion efficiency of 11.45% has been obtained, which is one of the superior performances reported for the carbon-based pure CsPbI2Br PSCs to date.
研究领域:
材料科学
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能源研究
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光伏技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Yueheng Wang,Ziyu Zhuang,Yanfei Fan,Dandan Gao,Dongdong Li
Ammonium ion is of the same charge as alkali ions and with similar ionic radius as potassium, rubidium, and cesium ions. Solid solutions are very common between ammonium and alkali salts, which is of great interest for understanding the geology, soil, and environment fate of these elements. In this study, the solid–aqueous equilibrium in the NH4Cl + RbCl + H2O and NH4Cl + CsCl + H2O systems was determined at 298.15 K. For each system, two incontinuous solid solutions, i.e. (NH4,Rb)Cl(α) and (Rb,NH4)Cl(β), or (Cs,NH4)Cl(α) and (NH4,Cs)Cl(β), presented, and their composition and structure were studied using Schreinemakers’ wet residues analysis, XRD, and Raman characterization. The equilibrium between these solid solutions and aqueous solutions were well modeled using an integrated solution equilibrium calculator program, in which a Pitzer-Simonson-Clegg model and a subregular model were implemented for describing the nonideality of aqueous phase and solid solution. According to the experimental and thermodynamic modeling results, NH4Cl can dissolve RbCl and CsCl in the solid state (NH4,Rb)Cl(α) or (NH4,Cs)Cl(β) with limited solid solubilities of 0.18 or 0.051 in mole fraction, respectively. RbCl or CsCl can also dissolve NH4Cl in the solid state (Rb,NH4)Cl(β) or (Cs,NH4)Cl(α) with limited solid solubilities of 0.37 and 0.095 in mole fraction, respectively.
研究领域:
化学
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环境科学
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地质学
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DOI
高影响因子
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