JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 4
·814-818
·
IF 1.3
Wang Peng,Zhang Binbin,Liu Xiaofei,Zhang Xin,Tu Rong,Zhang Song,Li Baowen
It remains a big challenge to synthesize two-dimensional (2D) GaN material for applications in power nanodevices. Traditional synthetic methods require complex equipment and processes and time consuming. Here, we reported a two-step route to prepare polycrystalline 2D GaN film. The amorphous ultrathin Ga 2 O 3 film was first exfoliated from the surface of liquid gallium. In a vapor phase reaction, 2D Ga 2 O 3 film was then converted into 2D GaN film while maintaining the 2D morphology. Raman and high-resolution transmission electron microscope (HRTEM) analysis implies the successful synthesis of wurtzite-type GaN ultrathin film. This simple strategy proposed in this work will provide more opportunities for applications of GaN ultrathin film in many devices.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yihan Yun,Wenlong Xie,Zhihua Yang,Guangmao Li,Shilie Pan
Birefringent materials are of great important as opto-electronic functional devices in solid laser system. Investigations on the design of new birefringent materials with large birefringence is meaningful. In this study, structure-birefringence relationship between AgGaS 2 (AGS) and NaGaS 2 (NGS) was systematically investigated. In the structures, the high ionic Na + cations broke the three dimensional (3D) [GaS] network to 2D layers, which results in the regular packing of GaS 4 tetrahedra and further the birefringence (~0.09, nearly twice that of AGS at ~1064 nm). Meanwhile, the blue-shift of the UV cutoff edge to 307 nm and a wide band gap of 3.9 eV has been observed in NGS. The property characterizations were carried out using the as-grown NGS single crystal with a size of 4 × 4 × 0.3 mm 3 by high temperature flux method. The results indicate that NGS may be a promising IR birefringent material and the cation substitution-oriented design strategy could be used to regulate the structure and optical properties of materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2018
·Vol. 27
·期 8
·589-597
·
IF 1.278
Yang Tuantuan,Wang Lixue,Liang Mei,Chen Yang,Zou Huawei
Gallium, a scarce metal produced mainly from Bayer liquor, is widely used in semiconductors. Ion-exchange method is currently considered as the most effective method to recover gallium from Bayer liquor. In this article, fibrous amidoxime adsorbents are introduced to recover gallium from Bayer liquor. In addition, hydrazine cross-linked polyvinyl amidoxime (HPAO) fibers have been prepared. The structure of the as-prepared fibers was ascertained by FTIR, elemental analysis and weight gain rate. The adsorption kinetics, adsorption isotherm and recycling performance were investigated by batch method. Cross-linking duration was studied and it turned out to be an important factor to optimize the adsorption capacity and recycling performance. After 1.5 h cross-linking time, the fiber showed the highest gallium adsorption capacity of 14.83 mg/g in Bayer liquor. After 3 h cross-linking time, the fiber showed the best recycling performance, which retained 82.9% of the initial adsorption ability after four cycles. Adsorption capacity of vanadium was lower than 1 mg/g for all samples. HPAO displayed very fast adsorption kinetics with an equilibrium at 60 min. The EDS results confirmed the low extraction of aluminum and vanadium provided by HPAO fibers. The gallium-loaded fiber could be effectively eluted by acidified thiourea. With proper control of the cross-linking duration by hydrazine, HPAO fiber with high selectivity towards gallium, high adsorption capacity and good recycle performance could be obtained, which is promising for recovering gallium needed for industrial applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
·
2025
·Vol. 78
·期 4
·1-10
·
IF 1.6
Pan Qi,Zhu Zhen,Lin Xiaocheng,Guo Bao,Jiang Kaixi
It is a waste of gallium resource to discard the high aluminum-containing gallium electrolyte. The Ga/Al separation is difficult by only using lime precipitation because of high gallium loss rate. The present study employs an adsorption resin LSC-600P to recover gallium in the simulated gallium electrolyte and then uses lime to remove aluminum, leaving only alkali solution recycled. The results showed that the aluminum removal rate in the gallium electrolyte was 93.12% under the conditions of reaction temperature of 85 °C, addition of lime 2 times to the theoretical molar ratio of calcium to aluminum, reaction time of 3 h and stirring speed of 600 r/min. In the experiments of gallium adsorption, after six adsorption–desorption cycles, the adsorption rate of gallium by LSC-600P resin still reached 98.6%, and the adsorption rate of aluminum was lower than 4.5%. In the desorption process, the desorption rate of gallium was more than 98%, and the aluminum content in the stripping solution after desorption was almost negligible. The resin exhibits high adsorption affinity for gallium while demonstrating minimal adsorption for aluminum.
研究领域:
冶金学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Catalysis
·
2021
·Vol. 4
·期 3
·202-211
·
IF 41.813
Liu Hongfei,Xia Jun,Zhang Nan,Cheng Han,Bi Wentuan,Zu Xiaolong,Chu Wangsheng,Wu HengAn,Wu Changzheng,Xie Yi
Conventional strategies for modifying electrocatalysts for efficient CO 2 reduction are mainly based on doping, defect/morphology engineering, substrate design and so on. In most cases, these methods can only tune their structures, electronic states and thereby catalytic properties in a gradual way. Here we report that the solid–liquid phase transition of Ga–Sn/Ga–In alloys can induce an instant and radical transformation of their atomic and electronic structures during electrocatalysis, which dramatically impacts their catalytic properties. The transition of Sn/In active components from phase-segregated clusters to dispersed single atoms during melting results in a unique electronic structure through further reduction of both metallic Sn/In and Ga. Such atomic/electronic structure transitions can correlate well with suppression of the hydrogen evolution reaction and an enhanced formate Faradaic efficiency from <35% to >95%. This two-state switching strategy may be extended to other catalytic reactions to determine correlations between their structures and catalytic properties.
研究领域:
电化学
·
材料科学
·
催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Jin Liu,Wei Lu,Qian Zhong,Hongzhang Wu,Yunlin Li,Lili Li,Zhenling Wang
Semiconductor photocatalysis has become the focus of recent research on antibiotic treatment because it is a green and efficient technology. In this study, α-GaOOH with several novel microstructures has been synthesized at a low temperature and its subsequent thermal transformation. The influence of pH on the synthesis of α-GaOOH is studied, and the results indicate that pH played an important role in the microstructures of α-GaOOH and β-Ga 2 O 3 . All Ga 2 O 3 samples possess macro-mesoporous network structures and exhibits a remarkable photocatalytic activity for antibiotic degradation. The photoelectron chemical tests show that the separation efficiency of photogenerated charge carriers of Ga 2 O 3 -7.0 is higher than that of other Ga 2 O 3 . The enhanced photocatalytic activity of Ga 2 O 3 -7.0 is mainly ascribed to its morphology and oxygen vacancy . The active species trapping and photoluminescence measurement experiments indicate that OH and O 2 − are the major active species contributing to the photocatalytic process. This study will bring about the potential application in treatment of the antibiotic pollutants.
研究领域:
材料科学
·
环境科学
·
半导体光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Xiao Li,Lixuan Zhang,Tingsong Li,Chen Hu,Haobo Hao,Lexiang Wu,Dariusz Hreniak,Jiang Li
The use of Faraday isolators in high-power lasers is currently a high-priority research topic and terbium gallium garnet (Tb 3 Ga 5 O 12 , TGG) transparent ceramic is a magneto-optical material with great potential for applications in the visible and near-infrared ranges. In this paper, the effect of chemical composition adjustment on the microstructure and properties of Tb 3 Ga 5(1+x) O 12 ceramics (where x is the non-stoichiometric index corresponding to the percentage difference in the amount of Ga used in the synthesis with respect to its content in the stoichiometric compound) was investigated. Powders obtained from starting materials of different stoichiometry were found to have similar morphology. However, the relative densities of the ceramics after pre-sintering in air increase with increasing Ga content. After the HIP post-treatment, the optimal properties with an in-line transmittance of 78.5 % (1.5 mm thick) at 1064 nm, and the Verdet constant of the ceramics with x = 0.8 % reaches −134.1 rad T −1 m −1 at 633 nm.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2013
·
IF 1.913
Zhaoxia Han,Dawei Zhang,Qinmiao Chen,Ruijin Hong,Chunxian Tao,Yuanshen Huang,Zhengji Ni,Songlin Zhuang
Single phase chalcopyrite and near stoichiometric CuIn 1− x Ga x Se 2 (0 ≤ x ≤ 1) nanoparticles were successfully synthesized by using a facile and rapid one-pot method. The effects of various Ga contents on crystal phase, morphology, element composition and absorption spectrum of the as-synthesized CuIn 1− x Ga x Se 2 nanoparticles were investigated in detail. The XRD and Raman patterns indicated that the as-synthesized nanoparticles had a single phase chalcopyrite structure, and the diffraction peaks shifted toward larger diffraction angles or higher frequencies with increasing Ga content. The FE-SEM images showed that the as-synthesized nanoparticles were polydispersed in both size and shape, and the nanoparticles with higher Ga content were more prone to aggregate. The Vis–IR absorption spectra showed strong absorption in the entire visible light region. The estimated band gap increased from 1.00 eV to 1.68 eV as Ga content increasing.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Jiaxin Fu,Jin Hu,Yamin Lv,Lidan Miao,Kaizhao Wang,Jiale Wu,Kaijun Wang,Weijun Zhang
Gallium oxide (Ga 2 O 3 ), a promising semiconductor material, has attracted significant attention in recent years. This study focuses on a method for rapidly obtaining high-purity Ga 2 O 3 through the one-step hydrolysis of gallium in an alkaline environment to address the challenges of complex experimental equipment and the high-pressure condition of the traditional method. Uniformly dispersed rod-like GaOOH with a length of 2 µm is prepared using a 5 mM polyvinylpyrrolidone solution. Additionally, Ga 2 O 3 (500 °C α-Ga 2 O 3 and 800 °C β-Ga 2 O 3 ) with different crystal forms is prepared by calcinating GaOOH at different temperatures. Compared with conventional methods, this approach offers a fast, safe, and cheap process for preparing high-purity Ga 2 O 3 .
研究领域:
材料科学
·
无机化学
·
半导体材料
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 7
·1754-1761
·
IF 2.566
Yantao Xu,Xusheng Xiao,Xiaoxia Cui,Fei Gao,Jian Cui,Xiaogang Liu,Haitao Guo,Jiangbo She,Gang Chen,Min Lu,Bo Peng
The diamagnetic performance of GeS2-Ga2S3 and GeS2-Ga2S3-PbI2 chalcogenide glasses were investigated, and the composition, wavelength and temperature dependences of the Verdet constant were discussed in detail. It indicates that the contributions to the Verdet constant for each kind of ion are in the order of VPb>VGa>VGe in these chalcogenide glasses, and the Becquerel rule is proved to be an effective guidance for predicting the Verdet constant value. A large Verdet constant is obtained in 68GeS2·17Ga2S3·15PbI2 composition glass and the value is 0.230 min·G−1·cm−1 at 635nm, which is greatly larger than those of commercial diamagnetic glasses. Besides, the temperature coefficient of Verdet constant can be regarded as a constant between 278 and 368 K, indicating these chalcogenide glasses are good candidates for magneto-optical devices in temperature instability conditions.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Stephan Handschuh-Wang,Tiansheng Gan,Tao Wang,Florian J. Stadler,Xuechang Zhou
Gallium-based alloys have garnered considerable attention in the scientific community, particularly as they are in an atypical liquid state at and near room temperature. Though physical parameters, such as thermal conductivity, electrical conductivity, viscosity, yield stress, and surface tension, of these alloys are broadly known, the surface tension (surface free energy) of the oxide skin remains intangible due to the high yield stress of the oxide skin. In this article, we propose to employ gradually attenuated vibrations to obtain equilibrium shapes, which are analyzed along the lines of the puddle height method. The surface tension of the oxide skin was determined on quartz glass and liquid metal-phobic diamond coating to be around 350–365 mN/m, thus independent of the substrate surface or employed liquid metal (i.e., eutectic Ga–In (EGaIn) and galinstan). The similarity of the surface tension for different alloys was ascribed to the composition of the oxide skin, which predominantly comprises gallium oxides due to thermodynamic constraints. We envision that this method can also be applied to other liquid metal alloys and liquid metal marble systems facilitating modeling, simulation, and optimization processes.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 6
·2001874
·
IF 6.147
Jing He,Fenglei Shi,Jianbo Wu,Jian Ye
Eutectic gallium indium (EGaIn) spherical liquid metal nanoparticles (NPs) can transform to gallium oxide hydroxide (GaOOH) microrods in water. Nevertheless, the mechanism of this process still remains unrevealed. In this work, the whole shape transformation process of EGaIn NPs is investigated via monitoring the change of NPs’ composition and morphology. Gallium (Ga) element in EGaIn NPs can be oxidized to form gallium oxide, which further reacts with water to generate micrometer-sized GaOOH crystals. This chemical variation occurs gently at room temperature and is accelerated by heating. With continuous consumption of Ga element, indium condenses to form individual NPs. The dynamic temperature-dependent dissolution and precipitation of GaOOH microrods in water are further demonstrated. Deep understanding of the mechanism of EGaIn NPs’ shape transformation would provide more approaches to control the surface and bulk properties of NPs for potential applications in various fields including soft robotics, wearable devices, and nanomedicine.
研究领域:
材料科学
·
化学
·
纳米技术
✓ 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）