INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Fan Yang,Ting Dong,Xixin Zhang,Jingjing Liu,Wentao Tian,Yifei Zhang
Semiconductor ionic electrolytes have obtained much attention because of good ionic conductivity and electrochemical performance. Novel semiconductor ionic NSDC (Ce 0.8 Sm 0.2 O 2-δ -Na 2 CO 3 )-LCCN (LiCo 0·225 Cu 0·075 Ni 0·7 O 3-δ ) composite materials have been adopted as electrolyte membrane for the first time, in which symmetrical cell composed of NSDC-LCCN membrane is constructed with Ni 0·8 Co 0·15 Al 0·05 LiO 2 (NCAl)-pasted Ni foam electrodes. An open circuit voltage (OCV) above 1 V and improved power density are obtained in the NSDC-LCCN cells, which confirms the functionality of the proposed semiconductor ionic materials. Meanwhile, X-ray diffractometer (XRD) and Scanning electron microscope (SEM) analyses identify the phase purity and homogenous nanocomposite morphology of all the NSDC-LCCN materials samples with various mass ratios. The performance illustrated by much more steady instead of transient state evaluation reveals that 3NSDC-LCCN composite electrolyte is most optimum, and the corresponding cell exhibits a considerable maximum power density of 598 mW cm −2 at 550 °C, over five times of that of pure NSDC electrolyte cells . Short-term duration test of 3NSDC-LCCN cell at 550 °C shows that the cell could steadily operate up to ~9 h without obvious degradation at a remarkable current density of 469 mA cm −2 , which indicates that NSDC-LCCN composite electrolyte is a promising material for low temperature solid oxide fuel cells .
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuai Wu,Xinbo Shi,Jin Shi,Tianyou Chen,Ting Jin,Fengxia Shen,Jiangfeng Mou,Shipeng Miao
A three-membrane electrolysis cell has been developed for the efficient conversion of CO 2 to CO, with Cl 2 and Na 2 CO 3 produced as byproducts. This cell consists of two chambers separated by a three-membrane assembly comprising a cation exchange membrane (CEM), a liquid electrolyte membrane (LEM), and a polyethylene (PE) membrane. In the cathodic chamber, CO 2 is electrochemically reduced to CO in organic electrolyte. And in the anodic chamber, Cl⁻ is oxidized to Cl 2 in aqueous solution. Simultaneously, Na⁺ migrates through the three-membrane system and enters into the cathode compartment, where, they combine with CO 3 2− generated from CO 2 reduction to form solid Na 2 CO 3 . The produced CO and Cl 2 can be served as feedstock for phosgene synthesis. This work presents a promising strategy for converting CO 2 into high-value chemicals.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Qingxia Zhou,Yanrong Cheng,Xia Guo
Developing a simple and effective method for detecting and separating amino acids has practical significance. Aqueous two-phase system (ATPS) has the advantages of mild preparation conditions, good stability, and high biocompatibility. In this study, an ATPS exhibiting distinct responses and selectivity profiles toward Phe, Trp, and Tyr was constructed using (1 S , 2 S )-(-)-1,2-diphenylethylenediamine (DPED), sodium dodecyl sulfate (SDS), and sodium carbonate (Na 2 CO 3 ). It is found that the amino acids can trigger the transformation of the DPED/SDS/Na 2 CO 3 ATPS into a single-phase system, but the critical concentrations required for this phase transition vary significantly among the amino acids: Phe and Trp induce the transition at very low concentrations, whereas Tyr requires a much higher concentration (8–13 times greater than Phe and Trp under optimal conditions). This stark contrast enables the DPED/SDS/Na 2 CO 3 ATPS to serve as a sensitive and visually distinguishable platform for differentiating Tyr from Phe and Trp. Moreover, the DPED/SDS/Na 2 CO 3 ATPS exhibits selective phase partitioning: Phe and Trp preferentially concentrate in the top phase, while Tyr predominantly distributes into the bottom phase. This distinct partitioning behavior allows for the efficient separation of Phe and Trp from Tyr, highlighting the system’s dual functionality for both detection and purification of Tyr from Phe and Trp. These findings indicate the potential of using this system to develop methods for separating and detecting the amino acids.
研究领域:
分析化学
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生物化学
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分离科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Xin Liu,Yong-De Yan,Yun Xue,Yue-Lin Wang,Qing-Guo Zhang,Guan-Qing Hu,Fu-Qiu Ma,Jing-Ping Wang
Waste resins produced from nuclear facilities operation always contain organic sulfur and radioisotope 65 Zn, which pose a significant threat for the ecological environment. This study proposed comparative research for treating cation exchange resins doped with Zn 2+ (Zn-CERs) in Na 2 CO 3 -K 2 CO 3 and Na 2 CO 3 -K 2 CO 3 -KOH. The enhanced removal effect of sulfur and Zn 2+ by KOH addition was explored. The energy dispersive spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were carried out to investigate the element distribution and chemical states of C, O, S and Zn on Zn-CERs. The results of thermogravimetric analysis (TG) showed that the oxidation process of Zn-CERs was basically divided into three steps, and Zn 2+ acted as a catalyst for S-C destruction. The relatively mild reaction of Zn-CERs in Na 2 CO 3 -K 2 CO 3 -KOH largely avoids the escape of harmful gases (H 2 S and SO 2 ) caused by the overreaction. The participation of KOH could promote the sulfation of sulfides and sulfites, and the transformational SO 4 2− content reaches a maximum value (26.51 %) at 800 °C. When the temperatures above 700 °C, Zn 2+ and K + combines with SO 4 2− to form K 2 Zn 2 (SO 4 ) 3 . The proposed enhanced molten salt oxidation (MSO) system had excellent retention rates of Zn (99.56 %) and S (87.39 %) at 800 °C, which provides further technical references for the removal of organic sulfur and heavy metals.
研究领域:
环境科学
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核化学与放射化学
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DOI
高影响因子
Journal of Cleaner Production
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2024
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IF 9.7
Zhihui Shen,Tiantian Wu,Jianlong Wang,Song Mao,Xianchen Wang
Efficient pretreatment of fine-disseminated gold ore is a challenge in effective gold extraction due to the invisible occurrence of the most encapsulated gold. In this study, we investigated the mechanism of co-pretreatment with eco-friendly CaO and Na 2 CO 3 to improve gold extraction from fine-disseminated gold ore using element content and valence measurement, phase composition analysis, micromorphology and structure characterization, and thermodynamic calculation . The results indicated that more than 75% of gold was encapsulated in pyrite, quartz and calcite . The gold leaching rate evidently increased with the reagent content and slurry temperature of the pretreatment , reaching a maximum of 86.55% at 60 °C and CaO and Na 2 CO 3 concentrations of 16 and 32 g/L, respectively. At lower concentrations of OH − or CO 3 2− , pyrite oxidation and quartz corrosion were both limited. Interestingly, at higher concentrations of OH − and CO 3 2− , pyrite was ultimately converted to Fe 2 O 3 and SO 4 2− under aerobic conditions ; meanwhile, partial dissolution products of quartz reacted with the intermediates of pyrite oxidation, generating a new phase of Fe 2 SiO 4 . In addition, the soluble intermediate ferric carbonate complexes, formed by the induction of sufficient CO 3 2− , inhibited the accumulation of the passivation layer on the pyrite surface, resulting in constant oxidation of pyrite. Furthermore, the oxidation of pyrite was the maximum at 60 °C, but limited at 90 °C due to the hindrance of oxidation product coating. As a result, the phase transition of gold-bearing pyrite and quartz could be enhanced by the synergistic pretreatment of CaO and Na 2 CO 3 , resulting in an approximately 30% increase in both exposed gold content and gold leaching rate. This research proposes a promising green pretreatment with cost benefits for fine-disseminated gold ore and provides significant insights into phase transition regulation to improve gold leaching.
研究领域:
矿物加工工程
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冶金学
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环境科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2018
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IF 6.945
Guanghong Zhang,Wenjian Li,Wen Huang,Zhiqun Cao,Kang Shao,Fengjiao Li,Chaoyun Tang,Cuihua Li,Chuanxin He,Qianling Zhang,Liangdong Fan
Highly conductive ceria-carbonate composite represents one type of most promising electrolyte materials for low temperature solid oxide fuel cells (SOFCs). Composites with large oxide-carbonate interface and homogeneous element/phase distribution are desirable to further enhance electrical properties and to study the ionic conduction mechanism. In this work, we report the successful synthesis of element/phase well-distributed, interfacial strongly coupled Sm 0.2 Ce 0.8 O 2 -Na 2 CO 3 (NSDC) nanocomposite with different residual carbonate contents by an in-situ one-pot one-step citric acid-nitrate combustion method. Interestingly, NSDC shows distinct properties over those prepared by conventional methods and improved ionic conductivity . In particular, NSDC9010 nanocomposite displays a proton conductivity of 0.044 S cm −1 at 650 °C, which is 3–5 times higher than the oxide proton conductors . Electrolyte supported SOFCs based on the resultant nanocomposite electrolyte, NSDC9010, give the best power output of 281.5 mW cm −2 at 600 °C with LiNiO 2 symmetric electro-catalysts. The excellent ionic conductivity and fuel cell performance are correlated with the unique core-shell structure, good phase distribution and large interfacial area induced by the one-step fabrication method , the strong coupling between oxide and carbonate as verified by the differential thermal and Raman spectroscopy characterization results and the optimal interfacial carbonate layer thickness by intentionally adjusting of carbonate contents.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
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2025
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IF 8
Wentao Pan,Sheng Huang,Huiliang Wen,Zhibing Huang,Jianhua Xie
This study investigated the synergistic effects of hydrocolloids (guar gum, GG; xanthan gum, XG; and carboxymethyl chitosan, CMC) and alkaline salts (Na 2 CO 3 and NaHCO 3 ) on germinated highland barley noodles. Hydrocolloids reduced cooking loss, breakage rate, and thermal decomposition of noodles while improving elongation, hardness, springiness, and chewiness. GG exhibited the most significant effects. The synergistic modification of GG (0.4 %) and Na 2 CO 3 (0.4 %) further optimized these properties, improving color and sensory evaluation scores. GG and alkaline salts enhanced intermolecular hydrogen bonding (OH···O), creating denser and more uniform noodles. The increases in degree of order (DO, 1047 cm −1 /1022 cm −1 ) and degree of double helix (DD, 995 cm −1 /1022 cm −1 ) indicated a more ordered structure. Resistant starch content increased from 18.27 % to 30.23 % and predicted glycemic index (pGI) decreased from 71.09 % to 58.15 %, offering benefits for diabetic health. This study improved the cooking quality and reduced the pGI of traditional noodles and broadened the application of germinated highland barley in noodle production.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Guanqing Hu,Qingguo Zhang,Yongde Yan,Yun Xue,Fuqiu Ma,Yuelin Wang,Xin Liu,Jinlong Song
With the rapid development of the global nuclear industry, substantial amounts of radioactive tributyl phosphate (TBP) have accumulated during the PUREX process. Prolonged accumulation poses significant environmental risks. Therefore, this study proposes an efficient molten salt oxidation (MSO) method for the treatment of gelled TBP. Comprehensive thermal analysis data indicate that the oxidation process of gelled TBP primarily consists of three stages. The composition of the waste salts after the MSO process was analyzed using X-ray diffraction spectroscopy. Fourier transform infrared spectroscopy revealed that the primary functional groups in gelled TBP were progressively degraded with increasing temperature. Scanning electron microscopy clearly illustrated the decomposition process of gelled TBP. X-ray photoelectron spectroscopy results identified the predominant forms of residual substances. The generated exhaust gas was analyzed using gas mass spectrometry and chromatography. Additionally, through DFT calculations of TBP, the possible reaction mechanism of TBP in the molten salts was deduced. In the molten state, carbonate can effectively absorb P 2 O 5 and eventually form stable NaPO 3 , which is the reason for the 94.90 % retention rate of phosphorus element. During the experimental process, the degradation rate of gelled TBP reached as high as 99.99 %. The MSO method proposed in this study shows great potential for the treatment of liquid organic waste.
研究领域:
核化学与化工
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环境科学
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计算化学
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DOI
PubMed
高影响因子
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
·
2018
·
IF 1.144
Miao Shiding,He Shuai,Xue Yuli,Nian Hongen,Wang Jian,Zhang Peng,Zhu Fujie,Wen Wanglin
Food grade (K2CO3 wt.%>99.0%, GB/T 25588-2010) potassium carbonate (K2CO3) has been extracted from low concentration [K+] solutions of K2CO3-Na2CO3-H2O,
which refers to a subsystem of brine water in the Lop Nor Lake in West China. Procedures of the isothermal evaporation, crystallization, CO2 acidification, filtration, and calcination were employed to prepare the K2CO3. This research focuses on the phase study
of metastable equilibria between K2CO3-Na2CO3-H2O and KHCO3-NaHCO3-H2O. The solubility, density, conductivity, and pH values were determined. Phase diagrams were plotted at temperatures of 298.2 and 313.2
K. At 298.2 K the ternary system of K2CO3-Na2CO3-H2O was found to have double salts in form of solid solutions Na2CO3·K2CO3·(6–12)H2O, which would hinder the process
of getting pure K2CO3 by the means of isothermal evaporation. In this protocol the high-pressure CO2 was charged to the ternary carbonate solution, and the K2CO3-Na2CO3-H2O was moved to bicarbonate system
KHCO3-NaHCO3-H2O. This quaternary system is of a simple co-saturation type of diagram, in which a solid solution (KHCO3·NaHCO3) was found to be greatly affected by temperatures. This finding affords efficient separation of KHCO3
from the KHCO3-NaHCO3-H2O solutions.
研究领域:
无机化学
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化学工程
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相平衡
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矿物加工
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资源回收
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DOI
高影响因子
Surfaces and Interfaces
·
2026
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IF 6
Huiqin Gao,Li Li,Xingzhong Huang,Zeyu Kang,Minlin Mao,Zhang Lin,Liyuan Chai,Weizhen Liu
Secondary aluminum dross (SAD), a major solid waste in the aluminum industry, possesses a complex composition representing both a valuable resource and a significant environmental challenge. Approximately 30%–40% of its aluminum content consists of inert species (α-Al 2 O 3 and MgAl 2 O 4 ). In this study, a method for the comprehensive extraction of Al from SAD was developed, which achieved 96% extraction efficiency. The process involved a two-step roasting sequence (first with (NH 4 ) 2 SO 4 at 350°C, then with Na 2 CO 3 at 800°C) and subsequent aqueous leaching. Key parameters, including additive dosage, roasting conditions, and leaching variables, were systematically investigated to optimize aluminum recovery. Mechanistic analysis revealed that (NH 4 ) 2 SO 4 destabilizes the Mg–Al bonds within the MgAl 2 O 4 structure, converting Al into the labile Al 2 (SO 4 ) 3 form. Subsequently, Na 2 CO 3 promotes the structural degradation of α-Al 2 O 3 . Consequently, most inert aluminum species in SAD are converted into soluble aluminum salts. This work provides a targeted activation strategy to overcome technical barriers in extracting inert aluminum, thus establishing a feasible route for total Al recovery from SAD.
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高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2022
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IF 3.571
Fangbo Xia,Lishan Guo,Peng Cui,Qian Xu,Junda Huang,Hongwei Zhou,Wei Shen
Short chain fatty acids (SCFAs), crucial intestinal bacterial metabolites , have been widely accepted as potential diagnostic markers in neonatal medicine. Nevertheless, it is still a great challenge to accurately quantify SCFAs in newborn fecal samples due to the huge variation of water content, limited commercial isotope-labeled internal standards and poor sensitivity. In this study, Na 2 CO 3 solution (50 μg/mL) was applied to convert the free SCFAs to SCFA sodium salts, which could prevent the loss of violate SCFAs during lyophilization process. Furthermore, N-methylbenzylamine- d 0 / d 3 was applied as the chemical derivatization regent to enhance the sensitivity and accuracy. Based on this method, the SCFA contents in meconium and neonatal fecal samples were analyzed to illustrate the change of SCFAs during the gut microbiome development. Chemical derivatization based on N-methylbenzylamine- d 0 / d 3 could not only significantly promote the sensitivity (323–1280 folds compared to free SCFAs) by promoting the ionization efficiency, but also provide one-to-one isotope internal standards. Moreover, 7 SCFAs, including acetic acid ( 2 ), n-butyric acid ( 4 ), isobutyric acid ( 5 ), 2-hydroxybutyric acid ( 11 ), 2-hydroxy-3-methylbutyric acid ( 13 ), 3-hydroxybutyric acid ( 14 ), 2-hydroxy-2-methylbutyric acid ( 17 ) were found to be significantly increased in neonatal fecal samples compared to the meconium fecal samples. All these results proved that this method could be applied for SCFA analysis in newborn fecal samples with perfect accuracy and sensitivity.
研究领域:
分析化学
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微生物学
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新生儿学
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代谢组学
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DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 6
·E68
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IF 3.266
Xinhua Cheng,Diyong Tang,Dingding Tang,Hua Zhu,Dihua Wang
Electrochemical splitting of Co3O4 into cobalt powder and oxygen was realized by electrolysis in molten Na2CO3-K2CO3 at 1023 K using a solid oxide pellet cathode and a Ni11Fe10Cu alloy inert anode. The electro-reduction mechanism of Co3O4 was investigated in details by cyclic voltammetry measurements and potentiostatic electrolysis in a three-electrode cell combining with the composition and morphology characterization of the electrolytic products. The electro-reduction of Co3O4 in Na2CO3-K2CO3 melt mainly involves two steps by electrochemical formation of intermediate product of CoO and then the CoO is reduced to cobalt metal. NaxCoO2 intermediate was not detected by XRD measurements and EDX analysis, different from the electro-reduction of Fe2O3 in this melt. However, the particle size and morphology of the intermediate CoO is found to be dependent of the applied potential in the range of −0.35 V to −0.75 V vs. Ag/Ag2SO4 reference electrode. Metallic cobalt powder was prepared by potentiostatic electrolysis at potential more negative than −1.25 V (vs. Ag/Ag2SO4) or by constant cell voltage electrolysis under a cell voltage higher than 1.7 V using a Ni11Fe10Cu inert anode. A high current efficiency of 95.3% and a low electrolysis energy consumption of 2.16 kW·h/kg-Co represents a novel high efficiency and green process for Co extraction. The Co product is a mixture of FCC and HCP structure, which is affected by the applied cell voltage and deserves further investigation to recognize the structure controllable condition and mechanism.
研究领域:
材料科学
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电化学
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冶金工程
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能源工程
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产品关联
DOI
高影响因子
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