Nanomaterials
·
2021
·Vol. 11
·期 8
·1932
·
IF 5.076
Leqiang Wu,Hengjia Shao,Chen Yang,Xiangmin Feng,Linxuan Han,Yanli Zhou,Wei Du,Xueqin Sun,Zhijun Xu,Xiaoyu Zhang,Fuyi Jiang,Caifu Dong
To date, the fabrication of advanced anode materials that can accommodate both Na+and K+storage is still very challenging. Herein, we developed a facile solvothermal and subsequent annealing process to synthesize SnS2/RGO composite, in which SnS2nanosheets are bonded on RGO, and investigated their potential as anodes for Na+and K+storage. When used as an anode in SIBs, the as-prepared SnS2/RGO displays preeminent performance (581 mAh g−1at 0.5 A g−1after 80 cycles), which is a significant improvement compared with pure SnS2. More encouragingly, SnS2/RGO also exhibits good cycling stability (130 mAh g−1at 0.3 A g−1after 300 cycles) and excellent rate capability (520.8 mAh g−1at 0.05 A g−1and 281.4 mAh g−1at 0.5 A g−1) when used as anode for PIBs. The well-engineered structure not only guarantees the fast electrode reaction kinetics, but also ensures superior pseudocapacitance contribution during repeated cycles, which has been proved by kinetic analysis.
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Advanced Energy and Sustainability Research
·
2022
·Vol. 3
·期 7
·2200006
·
IF 0
Shasha Hao,Shaotang Yu,Xinge Liu,Bingyan Li,Shuaiqi Han,Hao Xin,Weibo Yan,Wei Huang
Copper indium gallium selenide Cu(In,Ga)Se 2 (CIGS) solar cells fabricated by vacuum thermal evaporation, magnetron sputtering, or organic solvent solution-process either lead to high manufacturing cost and film nonuniformity or cause explosion, toxication and pollution. To address these issues, herein, water as a solvent to prepare the CIGS precursor solution is used and 7.04% efficient CIGS solar cells without MgF 2 antireflection layer is obtained. Furthermore, for the first time, K doping on CIGS films via adding “K + ” into the aqueous precursor solution is conducted. K–In–Se species is formed in the process of selenization and acts as a Se reservoir during CIGS grain growth, resulting in improved quality of the CIGS film with much larger grains. K doping can also inhibit the loss of Ga element. The high-bandgap K–In–Se phase and higher Ga content combine to result in the increase in the CIGS bandgap. As a result, the K-doped CIGS solar cell achieves a 33.1% enhancement in efficiency to 9.37%, with the significant increase in the open-circuit voltage from 520.5 to 597.1 mV and fill factor from 50.77 to 55.36%. These results provide an important preliminary foundation for the development of aqueous precursor solution-based CIGS solar cells.
研究领域:
光伏技术
·
材料科学
·
薄膜太阳能电池
·
半导体材料
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BULLETIN OF MATERIALS SCIENCE
·
2026
·Vol. 49
·期 1
·34
·
IF 2.1
Zhang Mengmeng,Ren Honghe,Yu Hongchao,He Zhaojun
Fe-doped polypyrrole hollow microspheres were prepared by in situ chemical oxidative polymerization. By ultrasonically dispersing the pyrrole monomer on the surface of a hollow ferroferric oxide hard template, the pyrrole monomer was uniformly distributed on the template surface and within the cavity, enabling simultaneous polymerization of pyrrole and Fe doping. The resulting Fe-doped polypyrrole hollow microspheres exhibited a regular spherical morphology with sizes in the micron range and a specific surface area of 116.7 m 2 /g. The adsorption characteristics of acid chrome blue K (AK) onto the iron-doped polypyrrole were systematically investigated, including the effects of pH, contact time, temperature, and initial dye concentration. The adsorption kinetics showed that equilibrium was reached within 50 min, and the experimental data were well described by the pseudo-second-order kinetic model. Thermodynamic analysis indicated that the adsorption of AK onto Fe-doped polypyrrole hollow microspheres is a spontaneous process. The Fe-doped polypyrrole exhibits advantages such as simple preparation, fast adsorption rate, and recyclability as an adsorbent. It offers an efficient, economical, and environmentally friendly approach, demonstrating strong potential for the treatment of high-concentration printing and dyeing wastewater.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Haijun Han,Xiang Ji,Junjie Ma,Zhifeng Xu,Lijiang Guo,Dongdong Li,Yan Yao
Water activities for the CaCl2–SrCl2–H2O ternary system and its sub-binary system were elaborately determined using an isopiestic vapor-pressure method at 323.15 K. The solubility of the titled ternary system at 323.15 K was also determined by the isothermal equilibrium method. The Pitzer–Simonson–Clegg (PSC) model was used for correlating the determined water activity and solubility data, simulating the thermodynamic properties, and predicting the solubility isotherm of the titled system. The reliability of the determined solubility results in this work was evaluated by comparing with the solubility isotherms calculated with the PSC model. The model simulation results showed that the thermodynamic properties and solubility can be predicted with binary parameters only. The experiment and simulation results showed that the equilibrium solid phase in the CaCl2–SrCl2–H2O ternary system are pure salts, and no solid solution was found at 323.15 K.
研究领域:
化学热力学
·
无机化学
·
溶液化学
·
相平衡
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ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Guojun Zhou,Xingxing Jiang,Jing Zhao,Maxim Molokeev,Zheshuai Lin,Quanlin Liu,Zhiguo Xia
Topological chemical reaction methods are indispensable for fabricating new materials or optimizing their functional properties, which is particularly important for two-dimensional (2D)-layered compounds with versatile structures. Herein, we demonstrate a low-temperature (∼350 °C) ion exchange approach to prefabricate metastable phosphors ALa1–xTa2O7:xBi3+ (A = K and Na) with RbLa1–xTa2O7:xBi3+ serving as precursors. The as-prepared ALa0.98Ta2O7:0.02 Bi3+ (A = Rb, K, and Na) share the same Dion–Jacobson type 2D-layered perovskite phase, and photoluminescence analyses show that ALa0.98Ta2O7:0.02 Bi3+ (A = Rb, K, and Na) phosphors exhibit broad emission bands peaking at 540, 550, and 510 nm, respectively, which are attributed to the nonradiative transition of Bi3+ from excited state 3P1 or 3P0 to ground state 1S0. The various Bi3+ local environments at the crystallographic sites enable the different distributions of emission and excitation spectra, and the photoluminescence tuning of ALa0.98Ta2O7:0.02 Bi3+ (A = Rb, K, and Na) phosphors are realized through alkali metal ion exchange. Notably, the combination of superior trivalent bismuth emission and low-temperature ion exchange synthesis leads to a novel yellow-emitting K(La0.98Bi0.02)Ta2O7 phosphor which is successfully applied in a white LED device based on a commercially available 365 nm LED chip. Our realizable cases of this low-temperature ion exchange strategy could promote exploration into metastable phosphors with intriguing properties.
研究领域:
材料科学
·
光电子学
·
无机化学
·
发光材料
·
固态化学
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ACS Omega
·
2022
·
IF 4.132
Guo-liang Nie,Rui-zhi Cui,Zhong Liu,Wu Li
In view of the composition characteristics of lithium, calcium, and bromine rich in Nanyishan oilfield water of the Qaidam Basin, Qinghai Province, the phase equilibrium relationships of quaternary system LiBr–NaBr–KBr–H2O and its ternary subsystems LiBr–NaBr–H2O and LiBr–KBr–H2O at 348.15 K were studied by the isothermal solution equilibrium method, and the equilibrium solid-phase crystallization regions and composition of each invariant point in each system were determined. The results show that there is no complex salt or solid solution in ternary systems LiBr–NaBr–H2O and LiBr–KBr–H2O at 348.15 K, and the phase diagram contains only one invariant point, two isothermal univariate curves, and two equilibrium solid-phase crystallization regions. The quaternary system LiBr–NaBr–KBr–H2O also has no formation of complex salt or solid solution, and the phase diagram contains only one invariant point, three isothermal univariate curves, and three equilibrium solid-phase crystallization regions. Meanwhile, the phase equilibrium relationships and change laws of each component of the above-mentioned systems at different temperatures were compared and discussed.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Miao Ma,Jidong Wang,Xiaotong Yang,Yixin Qu
In this paper, the solubility of clotrimazole, an antifungal drug, in 10 alcohols (n-propanol, iso-propanol, n-butanol, iso-butanol, sec-butanol, n-pentanol, iso-pentanol, n-hexanol, n-heptanol, and n-octanol) and 6 esters (methyl acetate, ethyl acetate, n-propyl acetate, n-butyl acetate, isopropyl acetate, and methyl propionate) was experimentally determined using a laser dynamic solubility-monitoring device in a temperature range of 283.15 to 323.15 K at atmospheric pressure. The functions of solubility versus temperature were regressed using three semi-empirical models (modified Apelblat, three-parameter van’t Hoff, and λh) and two activity coefficient models (Wilson and NRTL). The results show that all the five models can be used to correlate the solubility of clotrimazole with temperature in these solvents satisfactorily. Furthermore, the thermodynamic mixing properties (ΔmixG, ΔmixH, ΔmixS, ln(γ1∞), and H1E, ∞) were evaluated using the measured solubility values and Wilson model parameters.
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Frontiers in Chemistry
·
2023
·
IF 5.5
Cui Ruizhi,Peng Changwei,Nie Guoliang,Sang Shihua,Ren Hongbao,Li Wu
In view of the composition characteristics of lithium, calcium and bromine rich in Nanyishan oil and gas field brine of western Qaidam Basin, Qinghai Province, as well as based on the results reported in relevant literature, the phase equilibrium relationship of ternary system LiBr-CaBr2-H2O at 298.15 K was studied by isothermal dissolution equilibrium method. The equilibrium solid phase crystallization regions, as well as the compositions of invariant point, in phase diagram of this ternary system were clarified. On basis of the above ternary system research, the stable phase equilibria of quaternary systems (LiBr-NaBr-CaBr2-H2O, LiBr-KBr-CaBr2-H2O and LiBr-MgBr2-CaBr2-H2O), as well as quinary systems (LiBr-NaBr-KBr-CaBr2-H2O, LiBr-NaBr-MgBr2-CaBr2-H2O and LiBr-KBr-MgBr2-CaBr2-H2O) were further carried out at 298.15 K. According to the above experimental results, the corresponding phase diagrams at 298.15 K were drawn, which revealed the phase relationship of each component in solution and the law of crystallization and dissolution, and meanwhile summarized changing trends. The research results of this paper lay a foundation for further research on the multitemperature phase equilibria and thermodynamic properties of lithium and bromine containing high-component brine system in later stage, and also provide basic thermodynamic data for guiding the comprehensive development and utilization of this oil and gas field brine resource.
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RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2023
·Vol. 67
·期 1
·S78
·
IF 2.1
Han H. J.,Ma J. J.,Xing K. Q.,Shao D. X.,Zhong S. K.
Abstract In this work, the equal-water activities for the ternary system LiCl−KCl−H 2 O and its sub-binary systems LiCl−H 2 O were determined using an isopiestic method at 323.15 K. The determined isopiestic composition lines for the LiCl−KCl−H 2 O system were found to deviated Zdanovskii rule high with increasing ionic strength of the mixture solution. The addition of KCl to an aqueous solution of LiCl was found to decrease and increase the water activity at low and high LiCl molality. The Pitzer–Simonson–Clegg (PSC) model was used to represent the experimental determined water activities of the titled system and the calculated values are discussed. Based on the calculated results, the turning point appears at about 17.0 mol kg −1 LiCl solution.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhao Wang,Yurou Wang,Yuxuan Lin,Gang Bian,Hai-Yang Liu,Xiang Li,Jun Yin,Jian Zhu
Aqueous zinc-ion batteries (ZIBs) have gained wide attention for their low cost, high safety, and environmental friendliness in recent years. β-MnO2, a potential cathode material for ZIBs, has been restricted by its small channels for efficient charge storage. Herein, β-MnO2 nanorods with oxygen vacancies are fabricated by a K+-doping strategy to improve the performance of ZIBs. The assembled batteries exhibit a capacity of 468 mAh g–1, a power density of 2605 W kg–1, and an energy density of 179 Wh kg–1, which outperforms most reported ZIBs. Such a performance is owing to the synergistic combination of the oxygen vacancies in β-MnO2 and concurrent deposition of ε-MnO2 from Mn2+ in the electrolyte. Furthermore, superior cycling stability with negligible capacity decay in these batteries is demonstrated over 1000 cycles at a high current of 2 A g–1. This study reveals the importance of oxygen vacancies and Mn2+ deposition effect in understanding the mechanism of charge storage in MnO2-based ZIBs.
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高影响因子
Crystals
·
2022
·Vol. 12
·期 10
·1339
·
IF 2.67
Hui Han,Ying-Ying Wang,Xing-Chao Yu,Yan-Na Ma,Xuenian Chen
Alkali metal (M = Na, K) salts of the [CB11H12]−anion have attracted increasing attention in many fields such as catalysis and all-solid-state batteries. However, tedious and low-yielding synthetic methods have seriously limited their application in these fields. We developed a facile method for the direct synthesis of the unsolvated potassium and sodium salts of the [CB11H12]−anion in 66% and 68% yields, respectively, by reactions of Na[B11H14] with NaH/NaHMDS (sodium bis(trimethylsilyl)amide), CF3SiMe3in THF and K[B11H14] with KH, CF3SiMe3in DME. This method avoids the exchange of cation and significantly simplifies the reaction setup, thus enabling convenient large-scale synthesis. It is believed that this method will support further application of Na[CB11H12] and K[CB11H12] as solid electrolytes for an all-solid-state battery.Keywords:Na[CB11H12];K[CB11H12];Na[B11H14];K[B11H14];one-pot synthesis
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JOURNAL OF FOOD SCIENCE
·
2022
·Vol. 87
·期 6
·2463-2473
·
IF 3.693
Daojiu Zhang,Huibin Chen,Ledao Zhang,Ji-Li-Te Wang,Steve W Cui,Mingchun Wang,Ji Kang,Biao Wang,Hao Wang
This research aims to prepare capsules emulsion using gallic acid (GA), dextran (DEX), bovine serum albumin (BSA), sodium alginate, and K-carrageenan (K-Car) as the biological delivery system of lycopene. The stability and bioaccessibility of lycopene were further improved through encapsulation of covalent complex of sodium alginate and K-Car. The molecular weight distribution and secondary structure of the conjugates were analyzed by sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS–PAGE) and Fourier transform infrared spectroscopy (FTIR). The storage stability of the emulsion stabilized by conjugates was measured with Turbiscan stability index (TSI) and fluctuation of the particle size. The TSI value of ternary conjugates was 18.7 (37℃) with particle sizes ranging from 208 to 319 nm. Then, the changes of three-dimensional reticulate structures and physical properties of sodium alginate-K were analyzed by scanning electron microscopy (SEM) and TPA. The thermal stability of the sodium alginate–K-Car composite systems was increased compared with sodium alginate. The bioaccessibility of lycopene was significantly improved under the dual embedding of BSA–DEX–GA conjugate emulsion and sodium alginate–K-Car composite systems.
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