JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
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.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2020
·
IF 2.888
Lele Chen,Xiuxiu Yang,Yafei Guo,Tianlong Deng,Dan Li,Lingzong Meng
The solubility corresponding solution physicochemical properties (densities, refractive indices and pH) in the quaternary system (NaCl + NaBO 2 + Na 2 B 4 O 7 + H 2 O) were investigated at 298.15 K by the isothermal dissolution equilibrium method. The dry-salt phase diagram, water content diagram, refractive index diagram and pH diagram were drawn. There are four crystallization fields corresponding to NaCl, NaBO 2 ·4H 2 O, Na 2 B 4 O 7 ·10H 2 O, NaCl·NaBO 2 ·2H 2 O, five univariant curves and two invariant points in the phase diagram of the quaternary system. The solubility, concentrations of boron species B(OH) 3 , B(OH) 4 − , B 3 O 3 (OH) 4 − , B 4 O 5 (OH) 4 2− and OH − in the system were calculated using the Pitzer model. The variation trends for calculated solubility curves and pH curves are consistent with the experimental results. The distributions of different boron species were obtained in the mixed borate solution. The distributions of four boron species were obtained in the mixed borate solution. The main boron species in the mixed borate solution are B(OH) 4 − and B 4 O 5 (OH) 4 2− . The mole fractions of the four boron species are mainly affected by m (B) in the solution but less by m (Cl − ).
研究领域:
化学热力学
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无机化学
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Frontiers of Chemical Science and Engineering
·
2014
·Vol. 8
·期 3
·312-319
·
IF 0
Tan Ming,He Gaohong,Dai Yan,Wang Rujie,Shi Wenhua
The ternary phase diagrams of polyetherimide (PEI)/ N,N -dimethylacetamide (DMAc) with H 2 O and BuOH as non-solvent were simulated using solubility parameter and Flory-Huggins theory. The phase diagrams show that 5.5% H 2 O/BuOH system containing 5% BuOH and 0.5% H 2 O, or 6.5% H 2 O/BuOH system containing 6.2% BuOH and 0.3% H 2 O is required to induce liquid-liquid demixing for 20 wt-% PEI/DMAc casting solution. Therefore, BuOH can enhance the phase separation of the PEI casting solution and hereby induce higher porosity of the membrane, and the diffusion of BuOH into the water coagulation bath causes larger pore size easily compared with DMAc. Our predictions that the membrane pure water flux first increases then decreases, and the rejection ratio of bovine serum albumin decreases with the increasing concentration of BuOH were validated by the experiments using the prepared membranes.
研究领域:
材料科学
·
膜技术
·
化学工程
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xiaonan Li,Xirong Huang
Here, a functionalized organic salt composed of [N k,k,k,k ] + ( k = 1–4) and [MES] - (2-(N-morpholino)ethanesulfonate), i.e., Good’s buffer ionic liquid with self-buffering and biocompatible properties, was chosen as electrolyte as well as buffer to construct a H 2 O/AOT/isooctane bicontinuous microemulsion for enzymatic synthesis of polyaniline (PANI). Studies on the effects of the functionalized organic salt on the phase behavior indicate that [N k,k,k,k ][MES] can tune the phase inversion temperature of AOT-stabilized oil-water microemulsion system through changing the cationic alkyl chain length, exhibiting the properties of both inorganic salt and co-alcohol. More interestingly, the stability of horseradish peroxidase (HRP) solubilized in the H 2 O(0.1 M [N 1,1,1,1 ][MES], pH = 4.5)/AOT/isooctane bicontinuous microemulsion is much better than that formulated with mixed surfactants AOT/SB-12 and inorganic salt. Studies on the HRP-catalyzed oxidative polymerization of aniline in the present bicontinuous microemulsion indicates that at low surfactant content and high oil-water ratio, the present microemulsion resulted in a PANI with better conductivity than the counterpart reported elsewhere. This work is of guiding significance for constructing a less-component and enzyme-compatible bicontinuous microemulsion for template-assisted biopolymerization.
研究领域:
材料科学
·
生物化学
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SusMat
·
2021
·Vol. 1
·期 3
·448-457
·
IF 0
Zhaomin Chen,Xiaoqing Gu,Yutong Guo,Xin Wang,Mingwang Shao,Bin Dong,Zhenhui Kang
Electrochemical cell can overcome the inherent intermittence of the renewable energy sources, thus showing great potentials in applications ranging from electrical energy storage to future smart grid. However, the current electrochemical cells could not achieve the “total green” feature by fully utilizing the clean and abundant O 2 /H 2 O redox couples due to the enormous overpotentials for both oxygen reduction reaction (ORR) and oxygen release reaction (OER). Herein, we report a “total green” electrochemical composite film cell based on carbon dots (CDots), which can realize both ORR and OER in the acid environment. The in-air voltage generation (0.95 V, with a maximum power of 5.3 μW) relies on the multiple-electron-transfer redox chemical reaction between the two active components inside the composite film, that is, ORR/OER of CDots and the redox reaction of polyaniline (PANI) on the electrode and the resulting proton concentration gradient. Interestingly, the cell can be self-recovered at low load, recharged by adding H 2 O 2 , or electrocharged at high load. We anticipate that current study may open up new opportunities for designing and developing total-green energy storage and conversion systems for diverse applications.
研究领域:
材料科学
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能源技术
·
环境科学
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DOI
Advanced Energy Materials
·
2026
·
IF 25.5
Yuanzhen Liu,Tong Wang,Zhihong Du,Yuhao Wang,Yue Gong,Konrad Świerczek,Hailei Zhao
Solid oxide electrolysis cells (SOECs) hold significant potential for efficient, high‑rate conversion of CO 2 and H 2 O into syngas driven by renewable electricity. However, SOEC performance is often constrained by the scarcity of fuel electrode materials that combine high activity with structural stability for CO 2 and H 2 O electrochemical reduction. Here, we develop a rationally designed fuel electrode, Sr 1.95 FeMg 0.3 Mo 0.6 Ru 0.1 O 6-δ (SFMMRu), that exhibits coherent exsolution of ultrasmall Ru nanoparticles (1-5 nm) with an exceptionally high surface number density (∼2.7 × 10 4 particles µm −2 ). The resulting high density of stable metal-oxide interfaces markedly enhances CO 2 and H 2 O electroreduction kinetics. As a result, the SFMMRu exhibits low polarization resistances of 0.254 Ω cm 2 in 50% CO/CO 2 and 0.143 Ω cm 2 in 40% H 2 O/H 2 at 800°C. In SOEC operation at 1.5 V, high current densities of 2.24 A cm −2 and 2.88 A cm −2 are achieved for CO 2 and H 2 O electrolysis, respectively. Long-term operation exceeding 200 h at 1 A cm −2 in pure CO 2 demonstrates the high durability of the fuel electrode. Advanced electron microscopy combined with density functional theory calculations indicate that the formation of ultrasmall, densely distributed Ru nanoparticles stems from strong metal-support interactions between the Ru phase and the perovskite substrate.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Kunlin Li,Wei Guo,Yu Tian,Kai Li,Ping Ning,Xueyan Chen,Fei Wang,Changbin Zhang
Carbon-based materials are widely used for H 2 S oxidation, yet their performance under ambient conditions requires further improvement via precise structural engineering. In particular, existing MgO-modified carbon materials still suffer from suboptimal H 2 S removal capacity, limited regenerability, and/or complicated synthesis processes, which restrict their practical application in room-temperature desulfurization. In this work, we report MgO/N-doped carbon catalysts synthesized by an NH 3 ·H 2 O-modulated citric acid complexation method, which demonstrated superior activity for ambient H 2 S oxidation. It was shown that the introduction of NH 3 ·H 2 O induced the formation of NH 4 NO 3 in pyrolysis precursors, and the decomposition of NH 4 NO 3 during pyrolysis created abundant carbon defects and also incorporated pyridinic/pyrrolic N species. These defects anchor Mg ions, leading to the formation of well-dispersed MgO nanosheets that enhanced surface basicity and facilitated H 2 S dissociation. Meanwhile, the defect-rich structure significantly improved O 2 activation to generate reactive 1 O 2 species for efficient H 2 S oxidation. The optimized MNC-3 delivered an exceptional H₂S capacity of 2.41 g/g cat. with 55 h breakthrough time at room temperature, and retained 0.78 g/g cat. after three regeneration cycles. This work provides a rational design strategy for high-performance, cost-effective room-temperature desulfurization materials through integrated modulation of active phase morphology, nitrogen doping, and carbon defects.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yucong Wang,Yurong Zhang,Guanwen Wang,Yinuo Yang,Ruotong Zhang,Chenghui Liu,Hongxia Jia
The accurate and on-site measurement of trace water content in industrial processes is essential for product quality and production safety. However, most existing methods remain restricted to laboratory environments and are not readily applicable under complex field conditions. Herein, a universal visual sensing platform for rapid and accurate trace water content monitoring is proposed, based on H 2 O-actuated lattice regulation of the lead halide perovskite nanocrystals (HPNCs). Water specifically triggers the redox reaction between iodine and sulfur dioxide, and the resulting iodide ions subsequently undergo a halogen exchange with bromide ions in the HPNCs, thereby modulating their band gap and inducing distinct changes in emission wavelength and fluorescence color, thus enabling visual detection of trace water content. Despite the simple operation and instrument-free visual detection characteristics, its performance is comparable to the standard Karl Fischer volumetric titration method. Owing to the highly specific and rapid kinetics of H 2 O-triggered modulation of the perovskite structure, this strategy enables selective detection of water content within minutes. Integrated with a standard colorimetric card or a common smartphone, it enables semi-quantitative or quantitative on-site determination of water content in various real samples, pioneering a completely new platform for portable trace H 2 O sensing.
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CATALYSIS LETTERS
·
2019
·Vol. 150
·期 2
·375-383
·
IF 2.372
Liu Xiaolong,Zhao Ziwei,Ning Ruliang,Qin Yu,Zhu Tingyu,Liu Fagao
The promoting effect of Ce on V-W/Ti catalyst for selective catalytic reduction (SCR) of NO x by NH 3 was studied. Compared with the original V-W/Ti samples, addition of Ce contributed better NH 3 -SCR performance. The H 2 O and SO 2 resistance of Ce modified V-W/Ti catalyst was improved by the different impregnation sequence of Ce. The catalysts were characterized by NH 3 -temperature programmed desorption (NH 3 -TPD), X-ray photoelectron spectroscopy (XPS), and H 2 -temperature programmed reduction (H 2 -TPR) techniques. The results showed that the impregnation sequence of W and Ce influenced the NH 3 adsorption capacity of the catalysts. In comparison to 0.2V-5Ce-5W/Ti and 0.2V-(5Ce5W)/Ti, 0.2V-5W-5Ce/Ti catalyst contributed better H 2 O and SO 2 resistance, with the highest Ce 3+ /(Ce 4+ + Ce 3+ ) value of 36.6%. Besides, a catalytic mechanism of SCR reactions over Ce-doped V-W/Ti catalysts was proposed. Graphic
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Journal of Physical Chemistry C
·
2011
·
IF 4.524
Shungao Yin,Feng Huang,Jing Zhang,Jinsheng Zheng,Zhang Lin
Crystal growth kinetics of thioglycolic acid (TGA)-capped CdTe nanoparticles in H2O was studied at different particle concentrations, with the aim to understand the effects of concentration and surface state of primary particles on the growth mechanism of nanocrystals. The growth process of CdTe nanoparticles was monitored by in situ UV–vis absorbance spectra, which reveal the coexisting growth mechanisms of oriented attachment (OA) and Ostwald ripening (OR). Increasing the primary nanoparticle concentration facilitated the OA-based growth at the initial stage, while the OR growth which was mainly occurring at the latter stage was restrained. On the basis of the fitting activation energy and experimental zeta potential, the effect of surface charge was further discussed and proved to be the critical factor that affected the OA process by directing the particle–particle interaction.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Wendi Lai,Caixing Wang,Rui Fang,Kanghui Liu,Wei Yang,Guowang Diao,Yanrong Wang
Compared to conventional organic electrolytes, aqueous magnesium-ion batteries (AMIBs) have emerged as a research hotspot due to their superior safety, environmental compatibility, and cost-effectiveness. However, the further development of AMIBs has been impeded by their short cycling lifespan, primarily caused by the aqueous corrosion of Mg anodes in water-containing electrolytes, which generates inorganic passivation layers (e.g., Mg(OH)2 and MgO) on the anode surface. To address this challenge, we propose a collaborative two-pronged approach, involving the adoption of a novel electrolyte system (saturated MgCl2 aqueous solution containing 25 vol % PEG, SMP-3) and the use of a Mg alloy anode. Electrochemical investigations suggest that the PEG molecules form hydrogen bonds with H2O molecules, effectively suppressing water activity and thereby enhancing anode stability. The assembled PTO/Mg alloy full cell exhibited a stable discharge plateau at 1.5 V with an initial discharge capacity of 176.24 mAh g–1 at 200 mA g–1. Remarkably, the cell demonstrated exceptional cycling stability, maintaining a capacity of 150 mAh g–1 after 300 cycles (85% capacity retention), with an average Coulombic efficiency approaching 100%. The results demonstrate the feasibility of stabilizing Mg alloy anodes through an interfacial engineering strategy based on a water-in-salt electrolyte design. This strategic approach provides a novel pathway for developing low-cost, high-performance AMIBs.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Jing Li,Linglin Fu,Zongde Ma,Jinniu Chen,Changhao Wu,Nan Zhang,Xudong Yu
To understand the interrelationships within the multi-ion coexisting sulfate system during the solid–liquid transformation of polyhalite in the Bieletan area, phase equilibria of ternary systems M, Ca2+//SO42–-H2O (M = Na+, K+, Mg2+) at 288.2 K were studied by the isothermal dissolution equilibrium method. The solubility and density of the equilibrium liquid phases of the system were measured experimentally, and the composition of the equilibrium solid phase at the ternary invariant point was determined by X-ray powder diffractometry. It is found that the ternary system K+, Ca2+//SO42–-H2O at 288.2 K forms the double salt syngenite (K2SO4·CaSO4·H2O), while the systems Na+, Ca2+//SO42–-H2O and Mg2+, Ca2+//SO42–-H2O at 288.2 K only form with the formation of CaSO4·2H2O and Na2SO4·10H2O (MgSO4·7H2O). Multitemperature comparison of the M, Ca2+//SO42–-H2O (M = Na+, K+, Mg2+) systems shows that the phase diagrams of Mg2+, Ca2+//SO42–-H2O are consistent at the selected temperature, only containing CaSO4·2H2O and MgSO4·nH2O (n = 1, 6, 7). While K+, Ca2+//SO42–-H2O and Na+, Ca2+//SO42–-H2O change from 288.2 and 298.2 to 348.2 K, the phase diagram forms double salt(s) K2SO4·5CaSO4·H2O (Na2SO4·5CaSO4·3H2O and Na2SO4·CaSO4).
研究领域:
化学热力学
·
无机化学
·
相平衡
·
地球化学
·
矿物加工
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