CHEMICAL ENGINEERING RESEARCH & DESIGN
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2022
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IF 4.119
Haitao Zhou,Kun Huang
A new approach using water as the stripping phase for extraction and recovery of low-concentration Ga (III) from concentrated hydrochloric acid solutions by Aliquat 336-based supported liquid membrane (SLM) is suggested. Generally, the stripping of Ga (III) from the loaded organic phase during liquid-liquid two-phase stirring extraction using quaternary ammonium salt as an extractant is extremely difficult. However, in the present work, an efficient mass transfer of low-concentration Ga (III) through the SLM was observed by introducing a low acidity (pH=2) aqueous solution as the stripping phase of the SLM. It was revealed that dissociation of GaCl 4 - and HCl 2 - anions into Ga 3+ , Cl - and H + ions at the stripping/membrane phase interface play an important role in driving the mass transfer of GaCl 4 - from the concentrated hydrochloric acid solutions towards stripping phases. Kinetic analysis suggests that the permeability coefficient of Ga (III) ions through the SLM is dependent on the reaction temperature, extractant Aliquat 336 concentrations, and the difference in Cl - concentrations between the two sides of the liquid membrane phase , but independent of H + concentrations. In view of future’s applications for selective separation and recovery of low-concentration Ga (III) from the concentrated hydrochloric acid leaching solutions of various gallium-containing solid wastes, separation selectivity of Ga (III) against other coexisting metal impurity ions, such as Fe (II), Al (III), Mg (II) and Cu (II), was also evaluated.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
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2020
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IF 1.718
Haitao Zhou,Xiuli Zhang,Tianran Lv,Qingjie Guo,Lingyun Wang
The transport of Ga(III) from chloride solution by supported liquid membrane (SLM) using organophosphorus acids as carriers was studied and compared with solvent extraction results. The diffusion coefficient, permeability coefficient and mass transfer resistance for both processes were analyzed by investigating various parameters, such as flow pattern, flow rate, pH, Ga(III)/extractant concentration and temperature. Under optimized conditions, the extraction percentage of 97.0% and permeability coefficient of 9.22 × 10−6 m/s was achieved for SLM process. Kinetic modeling was proposed to determine the mass diffusion coefficient of Ga(III) complex across the membrane and stability of this SLM system was also examined.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yu She,Lin Shao,Min Yi,Yong Fang,Linqiao Qin,Yu Liu,Xinpeng Wang,Kaituo Wang
In this paper, efficient, economical and environmentally friendly mesoporous silica microspheres (MSMs) were prepared for the first time by reversed-phase suspension-dispersion method using water glass and acetic acid as raw materials. MSMs had excellent sphericity, with particle size concentrated at 100 µm, specific surface area of 207.90 m 2 /g and pore volume of 0.47 cm 3 /g. Adsorption equilibrium of Ga(III) by MSMs was reached in 30 min on 30 ppm GaCl 3 with dosage of 2 g/L and pH = 3, conforming to the pseudo-second-order kinetic model. The adsorption isotherm showed that the adsorption of Ga(III) by MSMs is endothermic process with saturation adsorption of 83.47 mg/g at 328 K. The K d of MSMs for Ga(III) was above 8000 in three multivariate systems of zinc ore leaching residues, fly ash and e-waste, showing excellent selectivity. The desorption equilibrium of 78.44 % was reached at 2 mol/L H 2 SO 4 for 120 min, and the adsorption rate of Ga(III) on MSMs was still exceeded 90 % after five adsorption–desorption cycles, showing that MSMs have excellent cycling performance. The fixed-bed column experiments showed the efficient separation and enrichment performance of MSMs for Ga(III) in simulated leachate. The adsorption process in MSMs is synergistic interaction is between physical adsorption and ion-exchange, with ion-exchange being the main mechanism. This provides a new approach to address the issues of poor adsorption capacity and slow adsorption–desorption rate faced by adsorbents for the highly selective recover of Ga(III) from zinc ore leaching residues, fly ash and e-waste, which is potentially promising for application.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Chunyan Li,Xin Li,Huiqin Wang,MengLing Zheng,Fang Tian,RuYong Tan,Pengwei Huo,Yan Yan,Xinkun Wang
Ternary metal layered double hydroxides (LDHs) have been widely used in supercapacitors (SCs) due to their polyvalent state and high electrochemical activity. In this study, Ga (III) doped NiCo layered double hydroxides (NiCoGa-LDHs) electrode material is prepared on carbon cloth (CC) by simple one-step hydrothermal method for the first time. The effects of Ga 3+ with different molar ratios on the structure, morphology, crystallinity, ion transport mechanics and electrochemical properties of ternary LDHs electrode materials are systematically investigated. At Ga 3+ = 1.0, the as-synthesized Ni 1 Co 3 Ga 1 -LDHs@CC exhibits a special electrochemical capacitance of 2012.5 F g -1 at 1 A g -1 with 57.7% capacitance retention observed at 5.0 A g -1 . The synthesis and evaluation of the two bimetallic NiCo-LDHs and NiGa-LDHs are similar in order to demonstrate the performance improvement of gallium heterovalent substitution. And heterovalent substitution of gallium for cobalt ion and nickel ion is proved indirectly. An Asymmetric supercapacitors (ASCs) device is assembled with Ni 1 Co 3 Ga 1 -LDHs@CC as anode and mesoporous carbon (MPC) as cathode, providing a high energy density of 84.22 Wh kg -1 at a power density of 800.1 W kg -1 , with excellent cyclic stability. This study provides a new way to improve the electrochemical performance and stability of ternary metal LDHs.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Jiajun Qin,Ming Li,Ming Yuan,Xinglei Shi,Jiliang Song,Yiyan He,Hongli Mao,Deling Kong,Zhongwei Gu
The metal gallium has enormous promise in fighting infections by disrupting bacterial iron metabolism via a “Trojan horse” trick. It is well worth trying to study the potential of gallium-mediated hydrogel for treating infected wounds. Herein, on the basis of a conventional gelation strategy of sodium alginate combined with metal ions, Ga3+ has been innovatively given a dual role in a dual-cross-linked hydrogel. It acts nor only as a cross-linking agent to form a hydrogel material but also as a therapeutic agent to slow-release and continuously treat infected wounds. Further photo-cross-linking is introduced to improve the mechanical properties of the hydrogel. Thus, a new gallium ionic- and photo-dual-cross-linked alginate hydrogel, with broad-spectrum antimicrobial activity and strengthened mechanical performance, for the treatment of infected wounds is reported. The morphology, degradability, swelling behavior, rheological properties, and gallium release kinetics together indicated the homogeneous and the strengthened mechanical performance of this hydrogel but did not impede the release of gallium ions. Interestingly, in vitro and in vivo results also demonstrated its favorable biocompatibility, reduced bacterial growth, and accelerated infected wound healing, making the gallium-incorporated hydrogel an ideal antimicrobial dressing.
研究领域:
材料科学
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生物医学工程
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制药学
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伤口护理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
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2023
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IF 14
Kui Xu,Caiyun Mu,Chi Zhang,Sijie Deng,Shan Lin,Linlin Zheng,Weizhen Chen,Qiqing Zhang
Improving the ability of implants to integrate with natural bone tissue at the initial stage of implantation remains a huge challenge because bone-to-implant interfaces are often accompanied by abnormal microenvironments with infection, reactive oxygen species (ROS) and unbalanced bone homeostasis. In this study, a multifunctional coating was fabricated on the basis of gallium (III)-phenolic networks. It is easily obtained by immersing the implants into a mixed solution of tannic acids (TAs) and gallium ions. The thickness of the coating can be precisely controlled by adjusting the number and time of immersion experiments. The resulting coating displays excellent near-infrared photothermal property. As the coating degrades, TAs and gallium ions with low concentration are released from the coating, which is more rapid in acidic and oxidative stress microenvironments. Photothermal performance as well as released TAs and gallium ions give the coating outstanding broad-spectrum antibacterial ability. Furthermore, the coating effectively reduces intracellular ROS of osteoblasts. In vitro and in vivo experiments demonstrate the capability of the coating enhancing implants’ osseointegration via pro-osteogenesis and inhibiting osteoclastogenesis. The findings imply that gallium (III)-phenolic coating holds great promise to promote implant osseointegration by rescuing abnormal microenvironments of infection, oxidative stress and unbalanced bone homeostasis.
研究领域:
生物材料
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生物医学工程
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骨科
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
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2023
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IF 4.7
Yimeng Xu,Bicheng Deng,Shengting Kuang,Wuping Liao
An aminophosphonate extractant, di(2-ethylhexyl) (N, N′-di(2-ethylhexyl) amino methyl) phosphonate (abbreviated as L ) was synthesized and applied for the extraction and separation of gallium and indium from chloride solution. The maximum separation factors SF Ga/In reached 995, which is higher than those obtained with its analogues such as Cextrant 230 ( SF Ga/In = 471) and BEADP ( SF Ga/In = 201) at the optimum acidity conditions. The extracted complexes were determined to be HGaCl 4 L 2 and InCl 3 L 2 . The extraction reactions of gallium and indium were both endothermic. The loading capacities of 30 vol% L for Ga and In were 32.9 g/L and 25.2 g/L, respectively. The loaded gallium and indium in organic phase can be effectively stripped by distilled water, H 2 SO 4 and HNO 3 . A process was established for the separation and purification of gallium, by which the purity of Ga 2 O 3 increases from 98.4% to 99.97% with a yield of 92.5%.
研究领域:
化学
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材料科学
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冶金学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）