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
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物理化学
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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
Guopeng Chen,Junsheng Yuan,Zilong Liu,Ming Lei,Bin Li
The solid–liquid equilibria in the LiBr–MgBr2–KBr–H2O system was measured, along with its two subsystems, LiBr–MgBr2–H2O and MgBr2–KBr–H2O, at 308.15 and 288.15 K using the isothermal dissolution equilibrium method. The stable phase diagrams of the three systems at 308.15 and 288.15 K were plotted. For the ternary LiBr–MgBr2–H2O system, two univariant curves, one ternary invariant point, and two crystallization fields, the fields being MgBr2·6H2O and LiBr·2H2O, were identified. The ternary system MgBr2–KBr–H2O contained three univariant curves, two ternary invariant points, and three crystallization fields corresponding to KBr, KBr·MgBr2·6H2O, and MgBr2·6H2O. From the stable phase diagram of the quaternary system, five univariant curves, four crystallization fields, and two invariant points were observed. The corresponding solids of the four crystallization fields were KBr, LiBr·2H2O, KBr·MgBr2·6H2O, and MgBr2·6H2O. The quaternary phase diagrams at 288.15 and 308.15 K had similar shapes, and the shapes of each crystallization field were identical. The crystallization field of KBr was larger than the other crystallization fields. With an increase in temperature, the crystallization field of KBr became smaller and that of LiBr became larger.
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
·
2019
·
IF 2.298
Chao Ye,Zhong-Zhong Wu,Shi-Hua Sang,Xiao-Yun Qi,Xing Liu
The solid–liquid phase equilibria of the ternary system KBr–LiBr–H2O at 273 and 308 K were determined by the isothermal dissolution equilibrium method. On the basis of the obtained experimental data, the stable phase diagrams of ternary system KBr–LiBr–H2O at 273 and 308 K were plotted, respectively. The results show that the ternary system is a simple cosaturated type at two different temperatures, and there is neither a solid solution nor a double salt in the system. Both of the phase diagrams include one invariant point, two univariant curves, and two crystalline regions (where the solids are LiBr·2H2O and KBr, respectively). The crystalline area of KBr is much larger than that of LiBr·2H2O, indicating that the solubility of KBr is much smaller than that of LiBr in the ternary system. The mass fraction of KBr in the equilibrium liquid phase is obviously reduced, which indicates that LiBr has a strong salting-out effect on KBr.
研究领域:
化学热力学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Chang-Wei Peng,Rui-Zhi Cui,Shi-Hua Sang,Hong-Bao Ren
According to the composition characteristics of mineral elements in underground brine in the Sichuan basin of China, the complete phase equilibria and phase diagram of the quinary system LiBr–NaBr–KBr–MgBr2–H2O were studied at 298.15 K. Using the experimentally determined solubilities and equilibrium solids, the spatial stereo phase diagram of the quinary system, the dry base projection phase diagrams of the saturated surfaces of the four salts MgBr2·6H2O, KBr, LiBr·2H2O, and NaBr·2H2O, and the corresponding water content diagrams were plotted, respectively. The experimental results show that at 298.15 K, in addition to the four original components, the anhydrous salt NaBr and the double salt KBr·MgBr2·6H2O are formed. The phase diagram of the quinary system at 298.15 K contains 10 univariate curves, three invariant points, and six equilibrium solid-phase crystallization regions (KBr crystallization region, NaBr crystallization region, NaBr·2H2O crystallization region, MgBr2·6H2O crystallization region, LiBr·2H2O crystallization region, KBr·MgBr2·6H2O crystallization region). When MgBr2·6H2O or KBr is saturated, LiBr has a strong salting-out effect on KBr, NaBr, or MgBr2 and NaBr, while when LiBr·2H2O is saturated, MgBr2 has a salting-out effect on KBr and NaBr. All four saturated projection surfaces have MgBr2·6H2O, and NaBr is generated. These phase equilibrium data can provide a theoretical basis to guide underground brine mining and extract useful components.
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
·
2024
·
IF 8.3
Xiongzhuang Jiang,Cong Geng,Xinxin Yu,Junye Pan,Huiren Zheng,Cheng Liang,Bin Li,Fei Long,Liyuan Han,Yi-Bing Cheng,Yong Peng
Wide-bandgap semitransparent perovskite photovoltaics are emerging as one of the ideal candidates for building-integrated photovoltaics (BIPV). However, surface defects in inorganic CsPbBr3 perovskite prepared by vapor deposition severely limit the optoelectronic performance of perovskite solar cells. To address this issue, a strategy of doping a trace amount of KBr into perovskite by vapor deposition is adopted, effectively improving the quality of the film, reducing surface defect concentration, and enhancing the transportation and extraction of charge carriers. Simultaneously, fully physical vapor deposition technology is employed to fabricate perovskite solar cells with an average visible light transmittance of 44%. These devices exhibited an ultrahigh open-circuit voltage of 1.55 V and a superior power conversion efficiency (PCE) of 7.28%, demonstrating excellent moisture and heat resistance. Moreover, the corresponding 5 cm × 5 cm modules achieve a PCE of 5.35% with great thermal insulation capability. This work provides an approach for fabricating highly efficient all-inorganic perovskite solar cells with high average visible light transmittance, demonstrating new insights into their application in building-integrated photovoltaics.
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Ziyu Liu,Xinyu Wang,Pengye Zhang,Haonan Zhang,Shuai Wang,Gaiyan Jiao,Wenting Wu,Mingbo Wu
The photosynthesis of hydrogen peroxide (H2O2) from oxygen (O2) represents a promising catalytic pathway, the limited efficiency of the oxygen reduction constitutes a primary barrier to enhancing production. In this content, alkali metal potassium (K+) and Br-doped g-C3N4 photocatalysts (K-CN) were successfully constructed by one-pot method. The introduction of K+ is not only beneficial to the transmission of space charge and the separation efficiency of photogenerated carriers, but also promotes the efficient production of H2O2 by 2e- oxygen reduction reaction. The introduction of Br- promotes O2 converted to triplet state and triggers energy transfer process to increase 1O2 production, O2 adsorption was facilitated through regulating the oxygen evolution (O2→1O2), which is beneficial to the subsequent oxygen reduction process. The results showed that the H2O2 yield of 0.05 K-CN catalyst reached 26.0 mmol g-1 h-1, which was more than 5 times that of pure g-C3N4.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
Asia-Pacific Journal of Chemical Engineering
·
2020
·Vol. 16
·期 2
·e2595
·
IF 1.06
Xiao-Yun Qi,Chun-Xia He,Shi-Hua Sang,Jia Liu,Yun-Yun Gao
The solubilities of the LiBr−NaBr−KBr−H 2 O system and its subsystems LiBr−NaBr−H 2 O and LiBr−KBr−H 2 O were investigated at 288.15 K by the isothermal dissolution equilibrium method, and the corresponding phase diagrams were plotted, respectively. In the three systems, neither solid solution nor double salt was found. For the first subsystem LiBr−NaBr−H 2 O, there are two invariant points, three dissolution equilibrium curves, and three crystallization regions, which are LiBr·2H 2 O, NaBr·2H 2 O, and NaBr. An invariant point, two dissolution equilibrium curves, and two crystallization regions, which are LiBr·2H 2 O and KBr, constitute the stable phase diagram of the second subsystem LiBr−KBr−H 2 O. The phase diagram of the quaternary system LiBr−NaBr−KBr−H 2 O consists of two invariant points, five solubility curves, and four regions in which are LiBr·2H 2 O, NaBr, NaBr·2H 2 O, and KBr.
研究领域:
化学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2023
·
IF 4.1
Xuting Dong,Guangcheng Wu,Guanglei Cui,Hao Li,Yarong Shen,Hengli He,Nian Liu,Zewen Zuo,Min Gu
NiO x -based inverted structure perovskite devices possess advantages in the application of single junction and tandem solar cells. However, energy loss and instability originating from interface defects commonly result in inferior device performance. Herein, Potassium Bromide (KBr), as a buffer layer , was inserted between the perovskite and NiO x hole transport layer to modify the interface. The valence band maximum of NiO x improved to −5.37 eV which matches better with perovskite. The lifetime of hot carriers and intrinsic charge recombination revealed by Femtosecond transient absorption spectroscopy (fs-TAS) confirm that KBr modification can facilitate charge separation. Benefiting from the improvement of perovskite quality which results from K + diffusion and enhanced charge transport, the power conversion efficiency (PCE) of the modified device reaches up to 19.21%, whereas the pristine is 17.56%. Meanwhile, the air stability of the unencapsulated device also improved dramatically, which maintains 80% of its initial PCE after 1100 h high humidity storage. This work unambiguous reveals the mechanism of perovskite/NiO x interface modification and provides a facile and effective strategy for interface optimization.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Changyuan Xu,Fengjiao Zhao,Yan Ding,Haizhen Song,Qun Wang,Hongming Yin
In this study, we propose a novel strategy to reduce Eu 2 O 3 to Eu 2+ in the 34.88P 2 O 5 -13.57B 2 O 3 -34.88ZnO-16.67KBr (PBZB) glass system by introducing (NH 4 ) 2 HPO 4 as a reducing phosphorus source. Photoluminescence (PL), photoluminescence excitation (PLE) spectral and UV–Vis absorption spectral analyses revealed that the emission peak at 325 nm excitation originates from the 4f 6 5d 1 → 4f 7 transition of Eu 2+ , confirming the reduction efficacy of (NH 4 ) 2 HPO 4 . Furthermore, incorporating 7.14 % Mn 2+ into PBZB glass and adjusting the concentration of Eu 2 O 3 demonstrated that Eu 2+ doping significantly enhances the red emission of Mn 2+ at 630 nm. Specifically, when the Eu 2 O 3 concentration is 0.12 mol%, the Mn 2+ emission intensity reaches its peak, with a 32.6 % increase in photoluminescence quantum yield (PLQY). However, further increasing the Eu 2 O 3 concentration leads to a decrease in Mn 2+ emission intensity and the appearance of Eu 3+ emission peaks, indicating a limited reduction capacity. Emission spectrum analysis showed a Eu 3+ reduction rate of 76.09 %. The effective energy transfer mechanism from Eu 2+ to Mn 2+ was verified through spectral overlap and decay curve analysis, with calculated energy transfer efficiency being similar to the PLQY increment. This study simplifies the Eu 3+ reduction process and provides a new method for optimizing Mn 2+ red emission in glass.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Rui-Zhi Cui,Wu Li,Ya-Ping Dong,Jun Li
The solubilities in the thermodynamic phase equilibria of the LiBr–NaBr–KBr–H2O system and its two subsystems LiBr–NaBr–H2O and LiBr–KBr–H2O at 298.15 K were investigated experimentally by the isothermal solution equilibrium method. Relevant stable-phase diagrams were plotted based on the experimental results. Using Pitzer’s solution model, nonreported mixing parameters ΨLi,Na,Br and ΨLi,K,Br were acquired and the solubilities of three systems were also predicted at 298.15 K. The results show that good agreement was obtained between calculated and experimental values.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Rui-Zhi Cui,Yong-Ming Zhang,Ya-Ping Dong,Wu Li
In this paper, the solubility of unreported systems LiBr–NaBr–Li 2 SO 4 –Na 2 SO 4 –H 2 O, LiBr–KBr–Li 2 SO 4 –K 2 SO 4 –H 2 O and the subsystem LiBr–Li 2 SO 4 –H 2 O was measured by isothermal dissolution method at 298.15 K. Three phase diagrams are also given. It was found that the diagram of LiBr–Li 2 SO 4 –H 2 O system has only one invariant point of LiBr·2H 2 O + Li 2 SO 4 ·H 2 O. The phase diagram of LiBr–NaBr–Li 2 SO 4 –Na 2 SO 4 –H 2 O system includes eight crystallization regions LiBr·2H 2 O, Li 2 SO 4 ·H 2 O, NaBr·2H 2 O, NaBr, Na 2 SO 4 ·10H 2 O, Na 2 SO 4 , Li 2 SO 4 ·3Na 2 SO 4 ·12H 2 O, and Li 2 SO 4 ·Na 2 SO 4 . Five crystallization regions corresponded to two single salts KBr and K 2 SO 4 , two hydrate salts Li 2 SO 4 ·H 2 O and LiBr·2H 2 O, and one double salt Li 2 SO 4 ·K 2 SO 4 in LiBr–KBr–Li 2 SO 4 –K 2 SO 4 –H 2 O system. The relevant Pitzer parameter was obtained and the result predicted by Pitzer model was consistent with the experimental values.
研究领域:
化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
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