JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Guanzheng Wang,Huazhi Lei,Zhong Liu,Zhentao Yuan,Lu Li,Zhaolin Zhan,Xiao Wang
Although GeO 2 exhibites a large theoretical capacity (2125 mAh g −1 ), its large volume change limits its wide application in anode materials. A novel oxygen-deficient and amorphous Ge/GeO 2 /C composite anode consisted of crystal Ge was synthesized in situ using hydrothermal methods and reductive sintering to improve the specific capacity and long life of GeO 2 -based anodes. The capacity of the Ge/GeO 2 /C anode is 1160 mAh g −1 at 0.2 A g −1 for 200 cycles. The reversible specific capacity is retained at 1004 mAh g −1 at A g −1 for 600 cycles, thereby showing excellent stability. The presence of rich oxygen vacancies and crystalline Ge can assist the reversible decomposition of amorphous GeO 2 to improve the ionic and electronic conductivity of the anode. In addition, a stable and uniform film thickness of ∼20 nm is formed at the Ge/GeO 2 /C electrode surfaces after down cycling 200 times, as observed by transmission electron microscopy. These excellent properties are due to the carbon composite, amorphous structure and high oxygen vacancy concentration of the anode and the synergistic effect by crystalline Ge.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Min Zhao,Dong-Lin Zhao,Xin-Yao Han,Hui-Xian Yang,Ya-Jing Duan,Xin-Min Tian
Germanium-based anode materials suffer from huge volume expansion during the lithium ion insertion/extraction process, along with particle agglomeration, resulting in electrodes destruction and batteries failure. Ge nanoparticles embedded in spherical ordered mesoporous carbon (S-OMC/Ge) composite could effectively alleviate the defects in the cycle, which provided a novel material with stable cycle performance, high capacity and good conductivity. The S-OMC/Ge composite maintained reversible capacities of 996 mAh·g −1 after 160 cycles at a current density of 100 mA g −1 and 530 mAh·g −1 at a high rate of 1 A g −1 , attributed to the synergistic effect between the support of spherical OMC and the high capacity provided by dispersed Ge particles.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
·
2019
·
IF 3.414
Hongling Zhou,Huihui Cao,Yuanru Zheng,Zibin Lu,Yuyao Chen,Dongyi Liu,Huayi Yang,Jingyu Quan,Chuying Huo,Junshan Liu,Linzhong Yu
Ethnopharmacological relevance Liang-Ge-San (LGS) is a traditional Chinese medicine formula that commonly used in acute inflammatory diseases . However, the anti-inflammatory effects and the underlying mechanisms of LGS are not fully studied. Aim of the study This study aims to investigate the anti-inflammatory activity and explore the underlying mechanisms of LGS in zebrafish and cell inflammation models. Materials and methods LPS-induced zebrafish inflammation model was established by LPS-yolk microinjection. The protective effect of LGS on zebrafish injected with LPS was observed using survival analysis. Infiltration of inflammatory cells was determined by H&E staining assay. Expression levels of key inflammatory cytokines TNF-α and IL-6 were measured by q-PCR assay. Recruitment of neutrophils and macrophages were observed by fluorescence microscopy , SB staining and NR staining. In vitro anti-inflammatory effects of LGS were evaluated on LPS-stimulated RAW 264.7 cells. The generation of IL-6 and TNF-α was detected by ELISA . The protein expression levels of JNK, p-JNK (Thr183/Tyr185), Nur77 and p-Nur77 (Ser351) were determined by Western blotting . Finally, two additional inflammatory models in zebrafish, which were induced by CuSO 4 or tail fin injury, were also established and the recruitment of neutrophils and macrophages were observed for the determination of the anti-inflammatory activity of LGS. Results LGS protected zebrafish against LPS-induced death and dose-dependently inhibited LPS-induced acute inflammatory response in zebrafish, as indicated by increased survival rate, reduced infiltration of inflammatory cells, decreased recruitment of macrophages and neutrophils, and downregulated expression levels of TNF-α and IL-6. Additionally, LGS inhibited the secretion of TNF-α and IL-6, increased the expression of Nur77, and reduced the expression of p-Nur77 (Ser351) and p-JNK (Thr183/Tyr185) in LPS-stimulated RAW 264.7 cells. The anti-inflammatory action of LGS was also observed in another two zebrafish inflammation models, which was supported by the inhibition on neutrophils and macrophages recruitment. Conclusion The present study demonstrates that LGS possesses anti-inflammatory activity in zebrafish inflammation models and LPS-stimulated RAW 264.7 cells, which is related to the inhibition on p-JNK and p-Nur77. This finding provides a pharmacological basis for LGS in the control of inflammatory disorder.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 7
·1754-1761
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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
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Bangrun Wang,Jun Jin,Kun Rui,Chenxi Zhu,Zhaoyin Wen
The hierarchical porous germanium/reduced graphene oxide (Ge/rGO) microspheres are synthesized through an industrially scalable spray drying technique using commercial germanium dioxide (GeO 2 ) as raw material. The Ge/rGO microspheres architecture with Ge nanoparticles homogeneously embedded in the three-dimensional (3D) interconnected conductive rGO network. When employed as anode for lithium ion batteries (LIBs), the as-obtained Ge/rGO microspheres exhibit excellent electrochemical performance with a high reversible capacity (811 mAh g −1 after 1000 cycles), ultra-long cycling life (over 80% capacity retention from the 6th to 1000 th cycles at 1 C), and high rate capability (380 mAh g −1 at 20 C). In addition, the full cell consisting of Ge/rGO-2 anode and LiFePO 4 cathode also delivers good cycling stability with high energy density . The 3D conductive rGO network provides the pathway for electron transportation and promotes to form stable solid electrolyte interphase (SEI) layer. Furthermore, the void space deduced from the porous structure can effectively accommodate volume changes and enhance the structural integrity of Ge/rGO microspheres. This facile and scalable synthetic strategy is beneficial for large-scale production of Ge-based electrode materials for further application in high energy and power density LIBs.
研究领域:
材料科学
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电化学
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储能技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 43
·18218-18224
·
IF 7.394
Jing Liu,Guowen Meng,Zhongbo Li,Zhulin Huang,Xiangdong Li
Surface-enhanced Raman scattering (SERS) is considered to be an excellent candidate for analytical detection schemes, because of its molecular specificity, rapid response and high sensitivity. Here, SERS-substrates of Ag-nanoparticle (Ag-NP) decorated Ge-nanotapers grafted on hexagonally ordered Si-micropillar (denoted as Ag-NP@Ge-nanotaper/Si-micropillar) arrays are fabricated via a combinatorial process of two-step etching to achieve hexagonal Si-micropillar arrays, chemical vapor deposition of flocky Ge-nanotapers on each Si-micropillar and decoration of Ag-NPs onto the Ge-nanotapers through galvanic displacement. With high density three-dimensional (3D) “hot spots” created from the large quantities of the neighboring Ag-NPs and large-scale uniform morphology, the hierarchical Ag-NP@Ge-nanotaper/Si-micropillar arrays exhibit strong and reproducible SERS activity. Using our hierarchical 3D SERS-substrates, both methyl parathion (a commonly used pesticide) and PCB-2 (one congener of highly toxic polychlorinated biphenyls) with concentrations down to 10−7 M and 10−5 M have been detected respectively, showing great potential in SERS-based rapid trace-level detection of toxic organic pollutants in the environment.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Mian Huang,Wei Xu,Yang Shen,Yuan-Hua Lin,Ce-Wen Nan
Ge-doped Li 7 La 3 Zr 2 O 12 (LLZ) is prepared via the conventional solid-state reaction. Our results showed that doping Ge of less than 1 wt% could stabilize the cubic phase of garnet-type LLZ and also increase its ionic conductivity up to 8.28 × 10 −4 S/cm at room temperature . When the content of Ge dopant is higher, GeO 2 impurity phase would appear and there coexists cubic and tetragonal mixed structures, lowering the conductivity. By combining X-ray absorption near-edge spectroscopy and full multiple-scattering theory, we find that Ge more likely enters into the Li and La crystallographic sites instead of the Zr site, which provides understanding of the micro-structural modulation by Ge dopants and the subsequent enhancement in the ionic conductivity.
研究领域:
材料科学
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固体化学
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 20
·6166
·
IF 3.623
Hongbo Gao,Kewang Zhang,Ailijiang Abudurusuli,Chen Bai,Zhihua Yang,Kangrong Lai,Junjie Li,Shilie Pan
Two new diamond-like (DL) chalcogenides, Li2MgGeSe4and Li2MgSnSe4, have been successfully synthesized using a conventional high-temperature solid-state method. The two compounds crystallize in the non-centrosymmetric space groupPmn21witha= 8.402 (14) Å,b= 7.181 (12) Å,c= 6.728 (11) Å,Z= 2 for Li2MgSnSe4, anda= 8.2961 (7) Å,b= 7.0069 (5) Å,c= 6.6116 (6) Å,Z= 2 for Li2MgGeSe4. The calculated results show that the second harmonic generation (SHG) coefficients of Li2MgSnSe4(d33= 12.19 pm/v) and Li2MgGeSe4(d33= −14.77 pm/v), mainly deriving from the [MSe4] (M = Ge, Sn) tetrahedral units, are close to the one in the benchmark AgGaS2(d14= 13.7 pm/V). The calculated band gaps for Li2MgSnSe4and Li2MgGeSe4are 2.42 and 2.44 eV, respectively. Moreover, the two compounds are the first series of alkali and alkaline-earth metal DL compounds in the I2-II-IV-VI4family, enriching the structural diversity of DL compounds.Keywords:diamond-like structure;chalcogenides;infrared nonlinear optical materials;second harmonic generation
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zidong Tan,Xin Jin,Yong Zhen,Chang Wei,Xingbin Li,Zhigan Deng,Minting Li
Selective extraction of indium and germanium from natural resources due to their important role in high-tech fields is attracting more and more attention. In this paper, indium and germanium were recovered from In-Ge residue leaching solution by the selective solvent extraction of indium with D2EHPA and the precipitation of germanium using tannin. This process included two main stages: indium-selective solvent extraction and germanium-selective precipitation. In the first stage, indium was extracted by using an organic phase containing 15% D2EHPA and 85% kerosene. The indium-loaded organic phase was washed with 0.5 M H 2 SO 4 and then stripped by 4 M HCl solution to obtain an indium extraction ratio of 99% and a stripping ratio of 98.3%. In the second stage, the pH of the raffinate was adjusted to 3.5–4.0 with ZnO dust and then mixed with tannin. Germanium (99%) was selectively precipitated as a tannin-germanium complex. The washed tannin-germanium complex was baked at 500 °C for 3 h to produce a germanium concentrate. By studying the separation coefficients of indium, germanium, and zinc (1994 and 1093, respectively), and controlling the reaction conditions, the maximum separation of indium, germanium, and zinc was obtained. The extraction mechanism of indium from sulfuric acid solution by D2EHPA and element migration during the precipitation of germanium using tannin were also studied. This proposed process flow can be used to selectively recover germanium and indium from In-Ge residue leaching solutions.
研究领域:
冶金学
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材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 11
·9074-9079
·
IF 3.201
Zhixiong Hu,Jiali Sheng,Jiahui Chen,Guoqing Sheng,Yunming Li,Xian-Zhu Fu,Lei Wang,Rong Sun,Ching-Ping Wong
Ge-Doped Li0.33La0.56TiO3 (Ge-LLTO) perovskites are synthesized with various GeO2 contents by solid-state reactions as Li-ion conductive electrolytes for rechargeable all-solid-state Li batteries. After the addition of GeO2, the sinterability and Li ion conductivity are enhanced for the perovskite solid electrolyte. The Li0.43La0.56Ti0.95Ge0.05O3 electrolytes exhibit the highest sinterability and Li ion conductivity among the as-prepared Li0.33+2xLa0.56Ti1−xGexO3 electrolytes. The improvement of Li ion conductivity might be attributed to the improvement of the densification and structural integrity of the LLTO solid electrolyte. The lithium transference number (tLi+) of Ge-doped LLTO is close to 1. Moreover, the Ge-LLTO electrolytes are stable in the potential range of 0–10 V vs. Li/Li+.
研究领域:
材料科学
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电化学
·
储能技术
·
固体离子学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Dacheng Zhang,Linlin Wang,Qian Wu,Yujie Yang,Jingli Xu
In this work, a novel N/O Co-doped hollow carbon nanocapsule-supported Ge nanoparticles nanocomposite (Ge-N/O-CNCs) was successfully prepared by a facile heating reflux method. N/O codoped hollow carbon nanocapsule-supported Ge nanoparticles not only relieve the agglomeration of Ge nanoparticles and control the volume expansion, but also facilitate the rapid transmission of electrons. In LIBs, the unique Ge-N/O-CNCs nanoarchitecture was used as the anode material. At a high current density of 1 A g -1 , it remains a stable specific capacity of 448 mAh g -1 remained after 100 cycles. Additionally, even at 3.2 A g -1 , this material exhibited a high-rate specific capacity of 350 mAh g -1 .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Fei Fan,Dechao Wang,Zengyi Li,Wulong Lu,Jianwei Liu,Xiaoyi Wei,Xu Cheng,Houxiang Sun,Huabing Zhang,Zhiping Chen,Wenwu Zhou
Developing high-performance supported non-precious metal copper-base catalysts for CO 2 hydrogenation is of extreme significance for the successful production of green methanol (CH 3 OH). Herein, Cu/ n Ge-CeO x catalysts ( n = 0, 0.25, 0.5, and 1 wt%) were synthesized via the incipient wetness impregnation method and comprehensively investigated using experiments and DFT calculations. Among all the catalysts, the Cu/0.5Ge-CeO x catalyst exhibited the highest concentration of oxygen vacancies, the smallest Cu grain size, and the most favorable regions for CO 2 adsorption. Compared to the Cu/0Ge-CeO x catalyst, the CH 3 OH yield was significantly improved over the Cu/0.5Ge-CeO x catalyst in the temperature range of 220–260°C under 3 MPa and a gas hourly space velocity of 3000 mL·g cat −1 ·h −1 . Especially at 260°C, the yield sharply increased from 35.23% to 82.21%, and this catalyst maintained high activity for 100 h. This was because the inert pair effect of the introduced Ge promoters induced lattice distortion on the support surface and regulated its microregion electron structures, while simultaneously establishing a highly active interface on the adjacent Cu cluster. This not only enabled an integrated process of in situ activated CO 2 and hydrogenation, but also inhibited the HCOO pathway, lowered the barrier of the rate-controlling step of the RWGS pathway, and reconciled some of its competing branching routes.
研究领域:
催化
·
材料科学
·
环境化学
·
化学工程
·
计算化学
✓ 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）