JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2017
·
IF 3.454
Xianqiang Chen,Haiming Qin,Ye Zhang,Jun Jiang,Yiquan Wu,Haochuan Jiang
Ce 3+ -doped Gd 3 (Al 1-x Ga x ) 5 O 12 (Ce:GAGG) transparent ceramics were successfully prepared via a solid state reaction/oxygen sintering method. The effects of Ga substitution on the structure and optical properties of the ceramics were investigated. The highest quantum yield and relatively high scintillation light yield were achieved in the Gd 3 (Al 0.6 Ga 0.4 ) 5 O 12 . The investigated processing technique demonstrated advantages such as increased flexibility and short processing time, thus being very cost effective. The investigated approach provides a much more economical alternative to the conventional melt growth processes used to fabricate single crystals.
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高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Qishu Lu,Wenxia Liu,Xiaona Liu,Dehai Yu,Zhaoping Song,Huili Wang,Guodong Li,Shaohua Ge
Conductive hydrogels incorporating liquid metals, particularly gallium (Ga) droplets, have garnered significant attention owing to the multifaceted functionalities they offer. In this study, we introduce a liquid-metal-based conductive hydrogel synthesized through radical polymerization of acrylic acid (AA) in the presence of Ga droplets stabilized by polyaniline (PANI) nanofibers and xanthan gum (XG) at room temperature. The incorporation of PANI not only enhances the stability of Ga-droplet dispersion but also improves the hydrogel’s mechanical properties, including tensile strength, toughness, and sensitivity as a sensor material. With the addition of 0.5 wt % PANI, the hydrogel displays an elongation at break of 964% and a tensile strength of 265 kPa, while exhibiting a sensor gauge factor (GF) of 13.4 within a strain range of 400–600%. The reversible noncovalent cross-links within the hydrogel confer excellent self-healing properties, achieving 98% self-healing efficiency in elongation at break within 6 h and 90% conductivity self-healing within 83 ms. Additionally, the hydrogel’s abundant functional groups enable strong adhesion to various substrates. As a sensing material, the hydrogel demonstrates rapid response and recovery times (250/250 ms), low detection limits (0.1%), and good durability (500 cycles under 10 and 100% strains). The cross-linked network composed of XG, PANI, and PAA imparts the hydrogel with water retention. Moreover, glycerol treatment reinforces the hydrogel’s mechanical strength and sensing abilities, extending their effectiveness even under extreme temperature conditions. As a result, the XG-PANI-Ga-PAA hydrogel-based strain sensor has emerged as a promising tool for monitoring human health and detecting a wide range of human activities with reliability and precision.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Wenxin Wang,Ruidong Yang,Qiqi Mao,Xu Mu,Hongjie Yu,Kai Deng,Jianguo Wang,Liang Wang,Hongjing Wang
The utilization of green hydrogen sources in H 2 O for alkynols electrocatalytic semihydrogenation reaction (ESHR) at ambient temperature provides a promising pathway toward the sustainable conversion of alkynols. However, it is still a great challenge to construct specific interfacial structure to adjust the electronic structure of Pd for the purpose of altering the strong adsorption of Pd with active hydrogen to enhance the production of alkenols. Here, the atomically dispersed GaO x -PdMo bimetallene nanoribbons (GaO x -PdMo BNRs) via oxygen bridging Ga atoms is designed to the surface of PdMo BNRs for 2-methyl-3-butyn-2-ol (MBY) ESHR to the synthesis of 2-methyl-3-buten-2-ol (MBE). The GaO x -PdMo BNRs achieve the excellent MBE selectivity (≈97.4%), Faraday efficiency (≈96.1%), and maintain long-term stability. Density functional theory demonstrates that the top electron-enriched Ga atoms and the bottom electron-deficient Pd atoms construct a “pyramidal” interface via the oxygen bridge. The unique surface can effectively activate H 2 O and weaken interaction between catalyst and MBE, thus promoting MBE generation. Moreover, the electron bridge effect between Ga-O-PdMo can induce p-d orbital hybridization to achieve lower the d -band center of surface Pd thus modulating the reactants adsorption. This work provides a strategy to improve ESHR performance by electron bridge effect to modulate interfacial electron distribution.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Hongliang Li,Zaijun Gong,Dongya Ma,Lei Guo,Jianwei Xie
Hybrid capacitive deionization (HCDI), an emerging desalination technique, is employed for the first time to remove the salt ions in the polypeptide solution, with the novel graphene aerogel (GA)/MoS 2 material as the cathode and the GA material as the anode. Structural characterization and performance tests demonstrate that the dispersed nanosheet structure of MoS 2 and the conductive 3D cross-network structure of GA synergistically stimulate more accessible redox active sites in GA/MoS 2 composite for ion storage. Specifically, the specific capacitance of the GA/MoS 2 composite electrode (143F·g −1 ) is twice that of the single MoS 2 electrode (72F·g −1 ). Also, the GA/MoS 2 electrode possesses exceptional ion removal capacity (32.71 mg·g −1 ) and high mean salt adsorption rate (0.85 mg·g −1 ·min −1 ). The ion removal mechanism and ion selectivity of the Cell GA(+)‖GA/MoS 2 (−) are investigated based on the electrode pairing mode, valence state and radius of ions, and Lewis acid-base theory. More importantly, the application of the Cell GA(+)‖GA/MoS 2 (−) in the polypeptide purification was confirmed by removing salt ions from the Ricinus communis biomarkers (RCB-2) polypeptide solution. The results display that the salt ions (92.1 %) were rapidly removed and the absolute recovery of the RCB-2 sample (62.4 %) was effectively obtained by mass spectrometry analysis. Therefore, this work provides a forward-looking strategy for the fast removal of salt ions from the polypeptide solution.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Lin Li,Hui Liu,Ran Wang,Qing Li,Lexin Zhang,Zhiwei Liu,Tifeng Jiao
To reduce mortality rate caused by life-threatening bacterial infections, advanced antibacterial materials have attracted widespread attention from researchers worldwide. In this study, the antibacterial P(AA-AM)/CA/GA nanofiber membranes with pH-responsive properties were successfully prepared by facile electrospinning technology. A series of characterizations of the obtained nanofiber membranes showed the addition of P(AA-AM) improves the surface wettability of the as-spun fibers in comparison to those of CA and CA/GA nanofiber membranes. High-temperature treatment was found to enhance the mechanical properties of the P(AA-AM)/CA/GA membranes due to the crosslinking reactions. The prepared P(AA-AM)/CA/GA nanofiber membrane exhibits a pH-responsive effect which is evident by the change in GA’s release rate in solutions with different pH values. The cellulose acetate (CA) spinning nanofiber structure formed by P(AA-AM) coated GA also extended the release process of GA and improved the antibacterial timeliness of nanofiber membranes. The antibacterial experiments on E. coli and S. aureus showed that the electrospun nanofiber membranes containing GA had potent antibacterial properties , which were further enhanced by increasing the GA content in the P(AA-AM)/CA/GA blends. This study provides an insight into the design and preparation of pH-sensitive antibacterial materials using facile electrospinning technology.
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Nanoscale
·
2024
·Vol. 16
·期 9
·4591-4599
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IF 5.8
Ouyang Lin,Lijin Wang,Xiulin Xie,Shuaibing Wang,Yibo Feng,Jiawen Xiao,Yu Zhang,Aiwei Tang
Silver-based I–III–VI-type semiconductor nanocrystals have received extensive attention due to their narrow-band luminescence properties. Herein, we demonstrated a seed-mediated growth of quaternary Ag–In–Ga–S (AIGS) nanocrystals (NCs) with narrow-band luminescence. By conducting partial cation exchange with In3+ and Ga3+ based on Ag2S NCs and controlling the Ag/In feeding ratios (0.25 to 2) of Ag–In–S seeds as well as the inventory of 1-dodecanethiol, we achieved optimized luminescence performance in the synthesized AIGS NCs, characterized by a narrow full width at half maximum of less than 40 nm. Meanwhile, narrow-band luminescent AIGS NCs exhibit a tetragonal AgGaS2 crystal structure and a gradient alloy structure, rather than a core–shell structure. Most importantly, the kinetics decay curves of time-resolved photoluminescence and the ground state bleaching in transient absorption generally agree with each other regarding the lifetime of the second decay component, which indicates that the narrow-band luminescence is due to the slow radiative recombination between trapped electrons and trapped holes located at the edge of the conduction band and the deep silver-related trap states (e.g., silver vacancy), respectively. This study provides new insights into the correlation between the narrow-band luminescence properties and the structural characteristics of AIGS NCs.
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2016
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IF 6.333
Jinlian Bi,Liyong Yao,Jianping Ao,Shoushuai Gao,Guozhong Sun,Qing He,Zhiqiang Zhou,Yun Sun,Yi Zhang
The issues of rough surface morphology and the incorporated additives of the electro-deposited Cu layers, which exists in electrodeposition-based processes, is one of the major obstacles to improve the efficiency of Cu(In,Ga)Se 2 (CIGSe) and Cu 2 ZnSnSe 4 (CZTSe) solar cells. In this study, the pulse current electro-deposition method is employed to deposit smooth Cu film on Mo substrate in CuSO 4 solution without any additives. Grain size of the deposited Cu film is decreased by high cathode polarization successfully. And the concentration polarization , which results from high pulse current density, is controlled successfully by adjusting the pulse frequency. Flat Cu film with smooth surface and compact structure is deposited as pulse current density @ 62.5 mA cm −2 , pulse frequency @100,000 Hz, and duty cycle @ 25%. CIGSe and CZTSe absorber films with flat surface and uniform elemental distribution are prepared by selenizing the stacking metal layers electro-deposited by pulse current method. Finally, the CIGSe and CZTSe solar cells with conversion efficiency of 10.39% and 7.83% respectively are fabricated based on the smooth Cu films, which are better than the solar cells fabricated by the rough Cu film deposited by direct current electro-deposition method.
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高影响因子
RADIOCHIMICA ACTA
·
2023
·Vol. 111
·期 12
·909-918
·
IF 1.8
Lingting Xia,Han Wu,Jing Gao,Tianzhen Ye,Long Qiu,Feize Li,Tu Lan,Jijun Yang,Jiali Liao,Ning Liu,Yuanyou Yang
In this work, a gallium–nickel alloy target with a weight percentage ratio of 7:3 was successfully prepared on Cu substrate in a chloride system at room temperature. A novel organic-solvent-free separation procedure based on two columns for extracting 68 Ge from irradiated Ga–Ni alloy target with high radionuclidic purity (99.99 %) was developed. By this separation procedure, the recovery of 68 Ge is 95 ± 5 % and the yield of 68 Ge via the nuclear reaction nat Ga(p, x n) 68 Ge was measured to be 0.27 ± 0.02 MBq/μA h.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
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.
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高影响因子
Catalysts
·
2019
·Vol. 9
·期 10
·854
·
IF 3.444
Jian Li,Xiangyu Li,Derun Hua,Xinning Lu,Yujue Wang
A series of gallium-containing MFI (Ga-MFI) zeolites with varying Ga2O3/Al2O3ratios were synthesized using hydrothermal synthesis and tested as catalyst in catalytic fast pyrolysis (CFP) of beech wood for aromatic production. The results show that the incorporation of Ga slightly reduced the effective pore size of Ga-MFI zeolites compared to conventional HZSM-5 zeolites. Therefore, the Ga-MFI zeolites increased the aromatic selectivity for smaller aromatics such as benzene, toluene, andp-xylene and decreased the aromatic selectivity for bulkier ones such asm-xylene,o-xylene, and polyaromatics in CFP of beech wood relative to HSZM-5. In particular, the yield and selectivity ofp-xylene, the most desired product from CFP of biomass, increased considerably from 1.64 C% and 33.3% for conventional HZSM-5 to 2.98–3.34 C% and 72.1–79.6% for the synthesized Ga-MFI zeolites. These results suggest that slightly reducing the pore size of MFI zeolite by Ga incorporation has a beneficial effect on optimizing the aromatic selectivity toward more valuable monoaromatic products, especiallyp-xylene, during CFP of biomass.Keywords:aromatics;biomass;MFI zeolites;gallium;catalytic fast pyrolysis
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高影响因子
CATALYSIS TODAY
·
2017
·
IF 4.636
Wenwu Zhou,Qing Zhang,Yasong Zhou,Qiang Wei,Lin Du,Sijia Ding,Shujiao Jiang,Yanan Zhang
USY zeolites have been modified by incorporation of gallium, phosphorus and a combination of gallium and phosphorus by wetness impregnation method using gallium nitrate and ammounium phosphate diabasic, and the corresponding NiMo supported hydrodesulfurization (HDS) catalysts have been prepared for HDS of an inferior FCC diesel. The individual physical-chemical properties of the modified USY zeolites and the series NiMo supported catalysts were characterized using XRD, N 2 -adsorption-desorption(BET), NH 3 -TPD, Py-FTIR, H 2 -TPR, HRTEM and XPS methods, and their catalytic performances for an inferior FCC diesel HDS were assessed. The results show that both gallium and phosphorus modification can modulate the acid property of USY zeolite and weaken the interaction between the active metal and the supports, thus enhancing the degree of sulfidation and the dispersion of Mo species that are beneficial for the HDS of highly refractory organosulfur compounds. The highest HDS and HDN efficiencies of 99.7% and 99.6%, respectively, were observed over the catalyst containing the PGaUSY zeolite. More importantly, gallium modification of the USY zeolite promotes the hydrodesulfurization of all organosulfur compounds, and especially 4,6-DMDBT, in the FCC diesel and phosphorus modification of the USY zeolite promotes the hydrodesulfurization of most organosulfur compounds except for 4,6-DMDBT in the FCC diesel.
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ECS Journal of Solid State Science and Technology
·
2018
·Vol. 7
·期 6
·N96
·
IF 1.808
Xiao Liu,Huiling Du,Jing Shi,Huicong Hu,Xingchen Hao
Recently, ferroelectrics of Bi0.5Na0.5TiO3 (BNT) based perovskite-structured oxides that exhibit ionic conductive grain have attracted great attention, and been proved to be highly dependent on the chemical composition. Herein, effects of Sr and Ga acceptors co-doping on the impedance characteristics and electric properties of non-stoichiometric BNT ceramics were studied. It indicates that the conductivity of BNT ceramics is significantly improved after introducing a certain amount of Sr and Ga, where the grain conductivity and grain boundary conductivity can be clearly distinguished. The inhomogeneity is reflected in which the acceptors preferentially diffuse along the grain boundaries with the change in activation energy. The conductivity could be influenced associated with dopant-vacancy defect complexes as the increasing of dopant content and sintering time. Ionic dominated conductive properties easily mixed with electronic contribution can be derived at different atmospheres. The degree of diffuseness and relaxation are enhanced monotonically with dopant concentration that revealed by a modified Curie-Weiss law at the high frequency.
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