Journal of Materiomics
·
2025
·
IF 9.6
Kui Xue,Min Xing,Tiantian Chen,Bingyun Xi,Haifeng Zhang,Kuicai Ye,Jiayin Feng,Wenhao Qian,Jiajun Qiu,Xuanyong Liu
For alveolar bone defects, magnesium membrane with the mechanical properties of shielding fibrocyte growth and sustainable release of Mg 2+ is an excellent choice for guide bone regeneration (GBR) surgery. However, insufficient osteogenesis and bacterial infection have hindered its application. In this study, Mg-Ga-LDH coating was successfully prepared, which delayed the degradation rate of the Mg membranes and greatly reduced the amount of hydrogen evolution. A weakly alkaline microenvironment (pH =8.5) containing appropriate concentrations of Mg 2+ and Ga 3+ was successfully constructed, effectively promoting the adhesion and proliferation of MC3T3-E1 cells. It also upregulated the expression of alkaline phosphatase and collagen, which were conducive to the formation of mineralized nodules, and promoted the osteogenic differentiation of rat bone marrow mesenchymal stem cells in vitro . In addition, Ga 3+ released from the coating and the generated alkaline microenvironment showed good antibacterial properties against S. aureus . The Mg-Ga-LDH coating can effectively reduce the degradation rate of Mg membranes and mitigate inflammation. The Mg-Ga-LDH coating modified Mg membrane promoted new bone formation in cranial defect animal models. This bone-promoting Mg 2+ and Ga 3+ releasing platform and weak alkaline microenvironment creation system paves the way for the application of Mg membranes in the field of GBR.
研究领域:
材料科学
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生物医学工程
·
口腔医学
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Xin Zhang,Ziguo Yuan,Qian Yao,Ying Zhang,Yao Fu
In this work, corn cob was used as raw material to selectively produce acetonitrile via catalytic fast pyrolysis (CFP) in ammonia over Ga/HZSM-5 catalyst. A series of catalysts with different catalyst carriers (including HZSM-5, USY, MCM-41, HY, and γ-Al 2 O 3 ) and active metals (including Fe, Co, Ni, Cu, Zn, Cr, Ca, Mg and Ga) were prepared and screened. The reaction conditions, such as temperature, ammonia flow rate and residence time were changed to investigate the effect on the product distribution and acetonitrile production. The results indicated that with the desired catalyst (2% Ga/HZSM-5) and optimal reaction conditions (Temperature 700 °C; ammonia flow rate 80 ml/min; residence time 2.4 s), the highest carbon yield of acetonitrile from corn cob with a value of 18.4% could be obtained, and the carbon selectivity in bio-oil was 83.5%. This study provides an economical and environmental-friendly method for the direct production of acetonitrile from abundant biomass.
研究领域:
能源与环境科学
·
生物质转化
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Zhenghang Tian,Yuanyi Liu,Zhiyuan Chen,Zhi Wan,Jizhou Yang,Peilin Zuo,Mingxin Ren,Peng Hu,Feng Teng,Haibo Fan
NiFe layered double hydroxides (NiFe-LDH), as a promising non-precious metal Oxygen Evolution Reaction(OER) catalyst, suffers from the inherent limitations of poor conductivity and insufficient exposure of active sites, coupled with the phenomenon of activity decline at its high current densities, which severely restricts its application in OER. Here, we propose a structurally defective strategy to prepare a self-assembled ultrathin nanosheet structure by introducing Ga3+ ion, and in situ growth of NiFeGa-LDH@NF on nickel foam (NF) to improve its OER performance, and the incorporation of Ga3+ reduces the average thickness of the nanosheets from 4-5 nm to 1-2 nm, which significantly increases the catalyst activity surface area, and further optimized its electronic structure causing the charge transfer resistance a significant decrease. The optimized NiFeGa-LDH@NF provides a high current density of 100 mA cm-2 at an overpotential of 252 mV, which is 43 mV lower than that of the pure NiFe-LDH@NF. Moreover, the voltage changes by only 1.3% after 72 h at a constant current density of 50 mA cm-2, showing its excellent stability. This work presents a new perspective to increase its structural defects by the introduction of transition metal ions and demonstrates the effect on OER performance, providing a new line of thought for the development of higher performance OER electrocatalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
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.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-12
·
IF 5.228
Xie Yinghao,Wu Fangfang,Sun Xiaoqin,Chen Hongmei,Lv Meilin,Ni Shuang,Liu Gang,Xu Xiaoxiang
Wurtzite solid solutions between GaN and ZnO highlight an intriguing paradigm for water splitting into hydrogen and oxygen using solar energy. However, large composition discrepancy often occurs inside the compound owing to the volatile nature of Zn, thereby prescribing rigorous terms on synthetic conditions. Here we demonstrate the merits of constituting quinary Zn-Ga-Ge-N-O solid solutions by introducing Ge into the wurtzite framework. The presence of Ge not only mitigates the vaporization of Zn but also strongly promotes particle crystallization. Synthetic details for these quinary compounds were systematically explored and their photocatalytic properties were thoroughly investigated. Proper starting molar ratios of Zn/Ga/Ge are of primary importance for single phase formation, high particle crystallinity and good photocatalytic performance. Efficient photocatalytic hydrogen and oxygen production from water were achieved for these quinary solid solutions which is strongly correlated with Ge content in the structure. Apparent quantum efficiency for optimized sample approaches 1.01% for hydrogen production and 1.14% for oxygen production. Theoretical calculation reveals the critical role of Zn for the band gap reduction in these solid solutions and their superior photocatalytic acitivity can be understood by the preservation of Zn in the structure as well as a good crystallinity after introducing Ge.
研究领域:
材料科学
·
光催化
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 106
·期 1
·158-172
·
IF 2.606
Luo Qiuzi,Sun Yihua,Guo Jin,Zhang Jiangyu,Fang Liang
In this study, the effect of Ti doping ratio on Ti/Ga co-doped ZnO (TGZ) nanopowders was investigated. TGZ nanoparticles with different Ti loadings were prepared using the sol-gel method and analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), infrared spectroscopy (FT-IR), ultraviolet-visible spectrophotometer (UV-Vis), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). The results show that when the Ti doping content is low (0.25at%–1at%), all TGZ samples are single-phase and have the same wurtzite structure as pure ZnO, and when the Ti doping content is high (1.5at%–6at%), a second phase appears, which is the Zn 2 TiO 4 inverse spinel phase. When the doping is low, Ti and Ga can replace the position of Zn, the particle size of ZnO is reduced, the absorption of visible light is enhanced, and the catalytic degradation ability is improved. When the powder is highly doped, the shape distortion of the powder is obvious, and the crystal changes from single-phase to multi-phase, but the absorption of visible light is enhanced, and the recombination of electron-hole pairs is reduced. Through the MB degradation experiment, it was found that T 1.5 G 1.5 Z had the strongest degradation ability, and the degradation rate reached 96% in 150 min. With the further doping of Ti, the degradation rate remained at a high level.
Graphical abstract
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 11
·3761
·
IF 3.748
Lei Wu,Doudou Qin,Fan Fang,Weifeng Wang,Wenying Zhao
Severe environmental pollution is caused by the massive discharge of complex industrial wastewater. The photocatalytic technology has been proved as an effective way to solve the problem, while an efficient photocatalyst is the most critical factor. Herein, a new photocatalyst MIL-68(Ga)_NH2was obtained by hydrothermal synthesis and were characterized by PXRD, FTIR,1H NMR, and TGA systematically. The result demonstrates that MIL-68(Ga)_NH2crystallized in orthorhombic system andCmcmspace group with the unit cell parameters:a= 36.699 Å,b= 21.223 Å,c= 6.75 Å,V= 5257.6 Å3, which sheds light on the maintenance of the crystal structure of the prototype material after amino modification. The conversion of Cr(VI) and binary pollutant Cr(VI)/RhB in wastewater under visible light stimulation was characterized by the UV-vis DRS. Complementary experimental results indicate that MIL-68(Ga)_NH2exhibits remarkable photocatalytic activity for Cr(VI) and the degradation rate reaches as high as 98.5% when pH = 2 and ethanol as hole-trapping agent under visible light irradiation with good reusability and stability. Owing to the synergistic effect between Cr(VI) and RhB in the binary pollutant system, MIL-68(Ga)_NH2exhibits excellent catalytic activity for both the pollutants, the degradation efficiency of Cr(VI) and RhB was up to 95.7% and 94.6% under visible light irradiation for 120 min, respectively. The possible removal mechanism of Cr(VI)/RhB based on MIL-68(Ga)_NH2was explored. In addition, Ga-based MOF was applied in the field of photocatalytic treatment of wastewater for the first time, which broadened the application of MOF materials in the field of photocatalysis.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Qiao Chen,Lidan Deng,Zewei Wu,Fang Wang,Xingmao Jiang
Propane dehydrogenation is one of the most admired technologies for propylene production. However, the development of an active and stable catalyst presents a significant challenge. In this study, Pt–Ga/SBA-15 catalysts were prepared via coimpregnation, followed by H2 reduction, and applied in propane dehydrogenation. The Pt–Ga/SBA-15 catalyst with a Ga/Pt molar ratio of 1 exhibited a high propane conversion of up to 60% and high selectivity toward propylene of 98.2% at 550 °C for 10 min, with a propane conversion of 51.6% and propylene selectivity of 99.5% after reaction for 25 h. The physicochemical properties characterized using N2 physisorption, XRD, TEM, XPS, CO chemisorption, and in situ CO–DRIFT spectroscopy reveal that the Pt–Ga alloy nanoparticles were formed on the SBA-15 support after direct reduction with H2. The study of coke formation via temperature-programmed oxidation showed that a large amount of coke was deposited over the support of spent Pt–Ga/SBA-15 catalyst, indicating coke mobility from the active sites to the supports and its contribution to catalyst stability. The activities of spent catalysts could be almost completely recovered via reduction regeneration, during which Pt–Ga alloy retains the original geometrical and electronic structure well. The dilution of Pt ensembles due to the addition of Ga, e.g., Pt–Ga alloy formation, plays an important role in enhancing the catalytic performance for propane dehydrogenation.
研究领域:
化学工程
·
催化科学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Jie Li,Feng Gao,Gang Wang,Yan Yang,Yahui Sun,Haokai Su,Xuening Han,Huaiwu Zhang,Qiang Li
Herein, Sm-Ga ions substituted MgCd ferrite (Mg 0.77 Cd 0.23 Fe 2-2x Sm x Ga x O 4 , x = 0.00–0.20) were synthesized via solid state method at low temperature using 2 wt% B 2 O 3 -Bi 2 O 3 -SiO 2 -ZnO glass (BBSZ glass) additive. Sm-Ga substitution did not change the spinel phase formation of ferrite. SEM showed that the grain size first increased and then decreased, while the bulk density displayed the opposite trend and the maximum density was 4.646 g/cm 3 at x = 0.10. Owing to Sm-Ga ions substitution, saturation magnetization ( M s ) first increased, and then decreased, while the coercivity ( H c ) decreased first, and then increased. At x = 0.10, the maximum M s was 25.33 emu/g, and the minimum H c was 28.82 Oe. The real part of magnetic permeability reached a maximum (μ' = 56.02 @x = 0.15) and then dropped down. The ferromagnetic resonance linewidth (at 9.56 GHz) was easily influenced by the Sm-Ga ions substitution, with the minimum value of 251.29 Oe at x = 0.10. Hence, the material has potential for microwave devices applications.
研究领域:
材料科学
·
磁学
✓ 已验证
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2024
·
IF 3.4
Zihao Song,Longjin Huang,Sheng Cui
In this work, a novel strategy for preparing Ga-doped TiO 2 composite aerogel antibacterial agent through the sol–gel method and supercritical technology is demonstrated. The specific surface area of the samples is as high as 175 m 2 g −1 and exhibits a 3D network structure with a multistage pore distribution. The obtained antibacterial agent combines the phototoxicity of TiO 2 , photo-independent toxicity of Ga 3+ , and structural properties of aerogels, showing a synergistic antibacterial effect. On the one hand, TiO 2 produces reactive oxygen species in the presence of light, thus destroying the structure of bacteria. On the other hand, Ga 3+ competitively replaces Fe 3+ and hinders the metabolic process of bacteria. Moreover, the structural properties of aerogels promote superior antimicrobial performance of antibacterial agents. Their antibacterial properties against Escherichia coli and Staphylococcus aureus bacteria are mainly investigated through the inhibition zone and natural colony counting method. In the results, it is shown that the structure and bactericidal activity of TiO 2 aerogel is effectively optimized with Ga 3+ doping. The maximum zone of inhibition of the composite aerogel against E. coli and S. aureus is 17.5 and 16 mm, and the bactericidal rate is as high as 98.57% and 96.60%, which exhibit outstanding bactericidal performance.
研究领域:
材料科学
·
微生物学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 15
·43702-43713
·
IF 5.8
Guo Jin,Sun Yihua,Luo Qiuzi,Zhang Jiangyu,Fang Liang
Innovative solar-driven heterostructure photocatalysts are promising for removing the organic contaminants in the water environment. In this work, a sequence of well-defined Z-scheme Ti-Ga co-doped ZnO/g-C 3 N 4 (TGZ/CN) heterostructure photocatalysts were developed via a simple sol–gel method and the single-phase dispersion method in order to realize the cooperative improvement from the Ti/Ga co-doping and construction of heterostructure. The synthesized samples were analyzed by a variety of characterization techniques, and the photocatalytic activity was assessed by photodegradation of methylene blue (MB) under visible light irradiation. Compared to the ZnO and g-C 3 N 4 , the TGZ/CN composite demonstrated higher photocatalytic performance for the degradation of MB indicating an efficient photocatalytic degradation rate of 95.4% in 105 min under visible light. Moreover, the TGZ/CN photocatalyst exhibited excellent stability after five cycles of MB photodegradation. Furthermore, the as-prepared composites’ possible photocatalytic mechanism was discussed in detail. The improved photocatalytic performance primarily resulted from the effectively reduced band gap of ZnO after Ti/Ga co-doping and the facilitated separation of photoexcited e − /h + pairs caused by the construction of Z-scheme heterojunction. This work offers novel insights in developing hybrids with highly efficient photocatalytic activity towards future environmental applications. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Tingzhan Wang,Jingkun Chen,Jiaxuan Chen,Xuan Yao,Gang Chen,Zheng Jiao,Jing-Tai Zhao,Shuai Cheng,Xue-Chun Yang,Qianli Li
N-butanol gas is a common volatile organic compound (VOC) that can pose a threat to human health and pollute the atmospheric environment. However, the n-butanol gas sensors suffer from low response and selectivity. Herein, we synthesized the Ga-doped ZnO (ZOG) sensors by one-step hydrothermal treatment and subsequent calcination. The oxygen vacancies content of 1-ZOG has increased by 46 % compared to pure ZnO. Rich oxygen vacancies can increase the response signal of 1-ZOG to 174.78 in darkness for 100 ppm n-butanol, which is 2.4 times that of ZnO. Furthermore, the gas sensing performance of 1-ZOG is improved by light excitation. Under UV irradiation, the response of 1-ZOG sensor to 100 ppm n-butanol is 3.6 times that of pure ZnO, up to 636.81. Meanwhile, the response signal of 1-ZOG to n-butanol is at least 6.32 times that of other gases under UV light, showing ultra-high selectivity. This study proved that both Ga doped and photo-excited are effective strategies for improving the sensitivity and selectivity of ZnO based gas sensors.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 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）