Journal of Materials Research and Technology-JMR&T
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2024
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IF 6.2
Yahao Geng,Shan Zhang,Yuying Wang,Shuochao You,Jing Cui,Guiyong Xiao
Hydroxyapatite (HAP), as an inorganic material with the biocompatible and bioactive, widely exists in hard tissues such as teeth and bones of mammals. However, the inherent brittleness of traditional HAP severely limits its clinical applications in load-bearing. HAP ultralong nanofibers with good flexibility can overcome this problem due to their high aspect ratio. In this work, the highly ordered HAP nanofibers are successfully synthesized by the calcium oleate precursor solvothermal method. The effects of ratio of PO 4 3− and CO 3 2− on the microstructure, orientation degree, and properties are researched. The results show that the arrangement of HAP nanofibers first changes from loose state to ordered dense structure, then to ordered loose form, and finally to disordered nanofibers with the increase of the PO 4 3− /CO 3 2− ratio. Meanwhile, the chemical composition, crystallinity, and thermal stability also change because of various PO 4 3− /CO 3 2− . In addition, the formation mechanism of highly ordered HAP nanofibers is explored as well in this work. Besides, the HAP ultralong nanofibers prepared by solvothermal method can be designed into advanced functional materials with highly ordered structures, which is expected to overcome the limitation of its difficult application in the load-bearing field.
研究领域:
材料科学
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生物医学工程
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2020
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IF 4.089
Hong He,Li Chen,Zhijun Wang,Lingjun Zhang,Tingting Ge,Xiao Xiang,Shuxia Wang,Yingzhou Huang,Shunbo Li
The effects of organic and inorganic additives on crystal morphology have been extensively studied in various materials. However, the basic fundamentals behind the morphology control are still under debate due to the differences in experimental observations and lack of technical means to control the microenvironments where the crystal grows. Microfluidic technology with convenient operation and precise control of related parameters provides a unique tool for the investigation of crystallization processes on the micrometer and even nanometer scale. A concentration-gradient microfluidic chip was designed to screen the ion compositions to investigate the factors influencing the crystal morphology, and calcium carbonate was chosen for this study. Unexpectedly, the CO32–:Ca2+ ratio is discovered to induce a calcite morphology transition from regular rhombohedral to irregular rhombohedral and nanoparticle aggregations. In contrast, the morphology transition is believed to be caused by variations of the Mg:Ca ratio and supersaturation. The incorporation of different mole ratios of magnesium ions is also found to give different morphologies. The experimentally observed crystal morphology transition indicates that the crystal morphology is influenced by the CO32–:Ca2+ ratio when magnesium ions are present in the system. The proposed microfluidic method, providing an exquisite control of microenvironments during crystallization, can be applied in other materials to analyze the origin of unique morphologies. In addition, the discovery extends our understanding of the morphology control of biominerals.
研究领域:
材料科学
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化学
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高影响因子
ACS Applied Energy Materials
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2025
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IF 5.5
Shenghao Zhao,Zhijiao Ji,Lu Hao,Zhangyou Wang,Jiawen Li,Fangge Cheng,Mansor Hussain,Jia Liu
Achieving high-efficiency electrooxidation of methanol (MOR) under low alkalinity is critical for the industrial application of direct methanol fuel cells. This challenge can be addressed by modulating the electron density of nanosized Pt particles via the support’s exchange effect. Herein, an electron-enriched Pt catalyst (Pt/Mn3O4) was successfully synthesized through the structural tuning of MnO2. The Pt/Mn3O4 catalyst exhibits a superior performance, delivering a mass activity of 1150 mA mgPt–1 in 0.1 M KOH with 4 M methanol, significantly outperforming commercial Pt/C (446 mA mgPt–1). The transfer of electrons from Mn3O4 to Pt was confirmed through X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and magnetic hysteresis loop analysis. Experimental and computational studies elucidate the nucleation mechanism of electron-enriched Pt, the source of active species (Pt–OH) for methanol oxidation, and the role of high-valence Mn. Furthermore, the spontaneous methanol decomposition on Pt/Mn3O4 and the corresponding active sites of dehydrogenation and CO oxidation were identified. Interference-free experiments revealed the deactivation mechanism of Pt/Mn3O4, underscoring the pivotal role of CO32– in the alkaline MOR.
研究领域:
材料科学
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电化学
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催化反应
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高影响因子
Surfaces and Interfaces
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2026
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IF 6
Xinxiong Wang,Yunpeng Liu,Aiting Xu,Qiao Zhang,Guangxing Yang,Lianpeng Tong,Feng Peng
The conversion of CO 2 into value-added chemicals using solar energy represents an ideal pathway to address the energy and environmental crises. However, the application of photocatalytic CO 2 reduction is still being hindered by the low CO 2 mass transfer and rapid charge carriers’ recombination. In this study, a Ga 2 O 3 /La 2 O 2 CO 3 composite heterojunction (GaO/LaOCO) with a surface rich in La(OH) 3 was constructed, successfully achieving both enhanced CO 2 adsorption and charge-separation efficiency. The composite undergoes a surface reconstruction of La(OH) 3 to La 2 (CO 3 ) 3 , resulting in a surface CO 3 2− layer that is conducive to CO 2 chemical adsorption and activation. In addition, band structure analysis confirms the formation of an energy-level alignment favorable for directional charge transfer. Under simulated sunlight, the prepared composite exhibits optimal photocatalytic CO 2 reduction activity without sacrificial agents and photosensitizers, achieving a CO production rate of 15.33 μmol g −1 over 5 h, along with good cycling stability. This enhanced activity originates from the synergy between surface La(OH) 3 for CO 2 enrichment/activation and Ga 2 O 3 for efficient electron transport. This work provides a strategy for enhancing photocatalytic CO 2 reduction performance by tailoring catalyst surface properties and interfacial structures.
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RSC Advances
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2020
·Vol. 10
·期 42
·24764-24771
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IF 3.119
Yu Wei,Yan Xia
A dual emission metal–organic framework (IRMOF-10-Eu) was prepared and used as a ratiometric fluorescent sensor for CO32− detection. IRMOF-10-Eu had good stability and excellent luminescence in aqueous solution. IRMOF-10-Eu showed dual fluorescence emission from the ligand and Eu3+ with single excitation. Upon treatment with CO32−, the fluorescence ratio (I624/I358) of the probe displayed significant change. The relative fluorescence intensity ratio (I624/I358) and CO32− concentration had a linear relationship in 50–300 μM range with a low detection limit of 9.58 μM. And the luminescence probe of CO32− showed a fast detection time. The possible mechanism was investigated. CO32− changed the structure of IRMOF-10-Eu and interrupted the energy transfer process. Thus, the fluorescence emission intensity of the ligand was increased and Eu3+ was decreased with the addition of CO32−. IRMOF-10-Eu was used to detect CO32− in seawater, which showed good prospect in practical application. Subsequently, a highly selective and sensitive probe, IRMOF-10-Eu, may pave an efficient way for CO32− detection in seawater.
研究领域:
材料科学
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分析化学
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环境科学
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PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2026
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IF 2.4
Jia Xu,Xun Wang,Jiazheng Qin,Ziwei Hu,Ruyi Lin,Yong Ma,Dan Li,Lingzong Meng
The solid–liquid phase equilibria of the quaternary system Na+, Cs+//Cl–, CO32––H2O and its subsystem Na2CO3–Cs2CO3–H2O at 308.15 K were studied by the isothermal dissolution method. The phase diagram of the system Na2CO3–Cs2CO3–H2O is composed of two single-salt crystallization fields of Na2CO3·H2O and Cs2CO3·H2O, two solubility univariant curves, and one invariant point. The dry-salt phase diagram of the quaternary system consists of three invariant points, seven univariant curves, and five crystallization regions corresponding to Na2CO3·H2O, NaCl, solid solution [Cs1–x(Na·H2O)x]Cl, Cs2CO3·H2O, and double salt CsCl·2NaCl·2H2O. The areas of crystallization zones decrease according to the above order. The Jan̈ecke index of H2O, pH, and refractive index of the liquid phase in the quaternary system change regularly with the Jan̈ecke index of Cs+. These results on the phase diagram of the quaternary system can supply theoretical references for cesium salt separation from carbonate-type brine.
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JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Te Tu,Jiaqi Zhang,Mengni Xiao,Feihong Liang,Enyu Wang,Lanlan Wu,Long Ji,Shuiping Yan
A novel strategy is proposed to lower CO 2 regeneration energy in DAC. • Monovalent-selective AEMs capable of selectively separating HCO 3 − and CO 3 2− were prepared. • The optimized membrane exhibited a superior HCO 3 − /CO 3 2− perm-selectivity of 24.2. • Specific energy consumption for CO 2 regeneration was reduced by 59.3% compared to commercial AEMs. • The fabricated AEMs exhibited both high HCO 3 − /CO 3 2− perm-selectivity and total carbon permeability. Direct air capture (DAC) is an emerging technology for reducing atmospheric CO 2 content directly, but its current deployment is limited by the high energy demand in CO 2 regeneration. As an energy-conserving alternative, bipolar membrane electrodialysis (BPMED) exploits pH differentials to drive CO 2 regeneration without external thermal inputs or pressurized environments. In this work, we propose a new strategy to construct anion exchange membranes (AEMs) with high carbon loading capacity, enabling preferential permeation of bicarbonate (HCO 3 − ) over carbonate (CO 3 2− ) to significantly reduce specific electrical energy consumption for CO 2 regeneration in BPMED. AEMs were synthesized in a single-casting-process fabrication that integrates the dual advantages of electrostatic regulation and self-crosslinking, achieved through the incorporation of trimethylamine and sulfamerazine (SF) into 2,6-dimethyl-1,4-phenylene oxide (BPPO). The resulting membranes exhibited low water uptake (<12.6%), minimal linear expansion rate (<3.5%), and an area resistance as low as 2.7 Ω cm 2 . The perm-selectivity ( P CO 3 2 ‐ HCO 3 ‐ ) declined with increasing applied current density. At 5 mA/cm 2 current density, the optimized AEM (BPPO-SF-0.12) exhibited a HCO 3 − permeability of 0.21 mmol/(cm 2 ·h) and a CO 3 2− permeability of 0.04 mmol/(cm 2 ·h), yielding a perm-selectivity value of 24.2, substantially higher than that of the commercial membrane (1.0). In BPMED-based CO 2 regeneration, BPPO-SF-0.12 achieved the highest CO 2 regeneration ratio of 45.3%, and its energy consumption was only 240 kJ/mol, corresponding to a 59.3% reduction relative to the commercial membrane (590 kJ/mol). These findings substantiate the efficacy of the proposed strategy, revealing that AEMs with elevated carbon loading concurrently augment CO 2 regeneration ratio and energy performance. Such results establish a practical framework for energy-minimal CO 2 liberation via BPMED technology. Download: Download high-res image (318KB) Download: Download full-size image
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
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IF 2.694
Qing Hao,Huan Zhou,Mengli Zhang,Si Wu,Junfang Yang
Rare-earth ore concentrate is calcined at high temperature by the alkaline method, and the associated elements fluorine and phosphorus are enriched in the form of sodium fluoride and sodium phosphate in water elution. To separate and recover fluorine and phosphorus from the aqueous solution, the solid–liquid equilibrium behaviors of the quaternary systems Na+//F–, CO32–, PO43–-H2O and their two sub-ternary systems NaF-Na3PO4-H2O and Na2CO3-Na3PO4-H2O at 313.15 K were studied via the isothermal solubility phase equilibrium method. Solubility data, liquid density and pH, two complete isothermal phase diagrams of the ternary system, and one complete isothermal phase diagram of the quaternary system were obtained. The results showed that two double salts NaF·2Na3PO4·19H2O and Na3PO4·3Na2CO3·8H2O occurred in the respective ternary systems. Five solid species of one anhydrous salt of NaF, two hydrous salts of Na2CO3·H2O and Na3PO4·12H2O, and two double salts of Na3PO4·3Na2CO3·8H2O and NaF·2Na3PO4·19H2O were found in the quaternary system. The phase diagram of the quaternary system consisted of three invariant points, five crystallization regions, and seven univariate curves. Na3PO4 easily combined with NaF to form double salt NaF·2Na3PO4·19H2O, which occupied a larger phase region in the quaternary phase diagram. The increase in Na2CO3 will lead to the decrease in the solubility of Na3PO4 and NaF in the system.
研究领域:
化学工程
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材料科学
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高影响因子
Frontiers in Chemistry
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2021
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IF 5.221
Yan Kang,Liu Liping,Zhao Hongxing,Tian Lei,Xu Zhifeng,Wang Ruixiang
To overcome the problem of arsenic separation and enrichment from an alkaline leaching solution in arsenic-containing dust, a CO32--type tri-n-octylmethyl-ammonium chloride (TOMAC) method for extracting thioarsenite is proposed in this paper. Considering an alkaline leaching solution as the research object, after vulcanization pretreatment, TOMAC transformation and organic phase saturated extraction capacity were measured, and the extraction mechanism was preliminarily studied. First, Cl−-type quaternary ammonium salt was effectively transformed to HCO3--type by treating organic phase with saturated NaHCO3five times. TOMAC was effectively transformed from HCO3- to CO32- type by alkaline washing with 1.0 mol/l NaOH solution; this washing was repeated thrice. Thereafter, the effects of organic phase composition, phase ratio, extraction time, and temperature on the extraction and separation of arsenic were investigated. The results show that under the conditions of 30% CO32--type TOMAC + 15% sec-octanol + 55% sulfonated kerosene, VO/VA = 1/1, and 5 min extraction at room temperature, the single-stage extraction rate of AsIII is 85.2%. The AsIII concentration in raffinate can be reduced to less than 1.33 × 10−3 mol/l by four-stage countercurrent extraction, and the extraction rate of AsIII can exceed 98.4%.
研究领域:
化学工程
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
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IF 2.694
Kuo Zhou,Xingfan Wang,Junfang Yang,Fenli Jin,Huan Zhou
The solubility equilibrium of Li+, Na+//Cl–, CO32– −H2O quaternary systems at 323.15 K and 348.15 K was studied via the isothermal solubility equilibrium method, and the complete phase diagrams were obtained including the properties of liquid density and pH. Solid species of LiCl·H2O, Li2CO3, NaCl, and Na2CO3·H2O are found in the quaternary system at 323.15 K and 348.15 K, and one double salt of Li2CO3·Na2CO3 is found at 348.15 K. The liquid phase of two invariant points and five univariant curves at 323.15 and three invariant points and seven univariant curves at 348.15 K in the quaternary system is determined. Li2CO3 covers the largest solid phase region and is hardly influenced by temperature; Li2CO3–NaCl is a stable salt pair, and its cosaturated solubility is the least at the diagonal line of Li2CO3–NaCl.
研究领域:
化学
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材料科学
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高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Yuheng Zhou,Guangzhe Wang,Pan Duan,Yang Hu,Gongwei Wang,Guang Feng,Lin Zhuang,Li Xiao
Technologies based on anion exchange membranes (AEMs), including fuel cells (AEMFCs) and water electrolysis (AEMWE), offer strong potential due to their use of non-precious metal catalysts and fluorine-free polyelectrolytes. However, CO 2 in cathode air causes severe voltage loss (“carbonation”), restricting large-scale AEMFC deployment. Using multiple operando techniques, this study elucidates the carbonation-induced degradation mechanism. Combined operando electrochemical impedance spectroscopy (EIS) and distribution of relaxation times (DRT) analysis reveal that carbonation elevates mass transport polarization resistance by over two orders of magnitude, dominating voltage loss. Operando EIS and anode CO 2 outlet monitoring show this effect arises not from reduced membrane conductivity, but from CO 3 2− enrichment in the anode catalyst layer ionomer via the CO 2 –CO 3 2- equilibrium. AEMFC operation follows mass conservation: CO 3 2− and OH − migrate simultaneously to the anode and participate in the hydrogen oxidation reaction in ratios determined at the cathode. In-situ surface-enhanced Raman spectroscopy (SERS) and electrochemical quartz crystal microbalance (EQCM) reveal carbonation forms a thickened electric double layer (EDL) at the electrode/polyelectrolyte interface, weakening interfacial electric fields and hindering CO 3 2− transport. Modulating anode ionomer ion exchange capacity (IEC) reduces both mass transport resistance and voltage loss, experimentally validating the mechanism and advancing understanding of EDL dynamics in AEMFCs.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Yifeng Xu,Rui Sun,Shubo Wang,Fei Fei,Zhangyu Gan,Pin Zhou
With the development of global industry, carbon dioxide emissions surged. The conversion of carbon dioxide from the air results in some CO 3 2− , which can exacerbate environmental disasters like ocean acidification. Therefore, the content of CO 3 2− in seawater is an important indicator of the degree of ocean acidification. In this study, natural fluorescent protein phycocyanin (PC) was used as a fluorescent probe, and a fluorescence detection method was established for quantitative monitoring of CO 3 2− with quick response time (within 50 s), high sensitivity, and selectivity. The fluorescence quenching phenomenon between PC and CO 3 2− was mainly attributed to static quenching. The limit of detection (LOD) was 0.42 μM and the method was successfully applied to monitor CO 3 2− in tap water and seawater, acquiring satisfactory recovery between 99.28 % and 106.40 %. More importantly, paper-based test strips were easily fabricated using PC, enabling the rapid, visual, and on-site detection of CO 3 2− with the aid of a smartphone. The visual detection integrated with the smartphone was converted to data information (RGB value) through a Color Picker APP and successfully used for quantitative identification of CO 3 2− . By capturing fluorescent images and analyzing the corresponding RGB value via a smartphone, the linear calibration ranged from 0.5 μM to 500.0 μM with LOD of 0.11 μM was obtained. Satisfactory recoveries were acquired in tap water (98.00 %-107.50 %) and seawater (97.30 %-101.74 %), respectively. Therefore, integrating the PC fluorescent paper with a smartphone realizes the rapid, visual, and on-site detection of CO 3 2− in the water environment, which is expected to broaden application prospects of monitoring ocean acidification degree.
研究领域:
环境科学
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分析化学
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PubMed
高影响因子
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