Nature Communications
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2020
·Vol. 11
·期 1
·1-8
·
IF 12.121
Xu Hong-Lei,Tkachenko Nikolay V.,Wang Zi-Chuan,Chen Wei-Xing,Qiao Lei,Muñoz-Castro Alvaro,Boldyrev Alexander I.,Sun Zhong-Ming
Sandwich-type clusters with the planar fragment containing a heterometallic sheet have remained elusive. In this work, we introduce the [K(2,2,2-crypt)] 4 {(Ge 9 ) 2 [ η 6 -Ge(PdPPh 3 ) 3 ]} complex that contains a heterometallic sandwich fragment. The title compound is structurally characterized by means of single-crystal X-ray diffraction, which reveals the presence of an unusual heteroatomic metal planar fragment Ge@Pd 3 . The planar fragment contains a rare formal zerovalent germanium core and a peculiar bonding mode of sp 2 -Ge@(PdPPh 3 ) 3 trigonal planar structure, whereas the nonagermanide fragments act as capping ligands. The chemical bonding pattern of the planar fragment consists of three 2c-2e Pd-Ge σ-bonds attaching Pd atoms to the core Ge atom, while the binding between the planar fragment and the aromatic Ge 9 ligands is provided by six 2c-2e Pd-Ge σ-bonds and two delocalized 4c-2e σ-bonds. The synthesized cluster represents a rare example of a sandwich compound with the heteroatomic metal planar fragment and inorganic aromatic capping ligands.
研究领域:
无机化学
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材料科学
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DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
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2012
·
IF 4.859
Mian Huang,Alexandre Dumon,Ce-Wen Nan
The doping effect of Si, In and Ge in Li 7 La 3 Zr 2 O 12 (LLZ) as the solid electrolyte was studied via conventional solid-state reaction. The crystal structure, cross-sectional morphology, element distribution and conductivity were characterized for the undoped and doped LLZ ceramics. Our results showed that Si and In doping deteriorate electrical properties of LLZ as electrolyte, while Ge doping obviously improves properties. Ge might thus be a promising element for further increasing the ionic conductivity of LLZ ceramics.
研究领域:
材料科学
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固态离子学
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DOI
高影响因子
OPTICAL MATERIALS
·
2024
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IF 3.8
Ying Zhang,Xin Liu,Yonggang Zhao,Zhineng Zhou,Yufei Chen,Congyan Xu,Xinghuan Hu,Xu Su,Lang Wu,Xiaoyu Jin,Shurong Wang
In recent years, there is significant interest in Cu 2 SnS 3 (CTS) thin film solar cells owing to the eco-friendly nature and abundant elemental composition. However, the efficiency prepared in laboratory settings for these solar cell remains relatively low, primarily due to serious open-circuit voltage losses. Cation substitution is one of the strategies to alleviate this problem. In this work, Ag and Ge dual-cation substitution in CTS is proposed, which occupy partial Cu and Sn lattice sites respectively. Investigation reveals that substituting Cu with part Ag increases the band gap slightly, promotes grain growth, and improves crystallinity of CTS films. Simultaneously, Ge incorporation shifts the conduction band upwards to some extent, while reducing grain boundaries, due to increasing the grain size. As a result, the incorporation of 6 % Ag resulted in an optimal efficiency (PCE) of 2.78 %. Furthermore, employing dual-cation substitution with 6 % Ag and 6 % Ge is employed, the CTS device achieved an optimal efficiency of 3.15 %. This work develops the synergistic effect of Ag and Ge dual-cation substitution in CTS device and confirms that this approach can improve device performance, thus providing new research ideas for advancing the development of CTS device.
研究领域:
材料科学
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太阳能电池研究
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产品关联
DOI
高影响因子
Advanced Photonics Research
·
2025
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IF 3.9
Xiaodi Luo,Jiahao Li,Zixin He,Xiaofei Ma,Qinggang Qin,Wei Chen,Zhengyu Xu,Zhifan Qiu,Yingjian Wang,Liang Li,Dongfeng Shi
The breakthrough in van der Waals heterojunction diodes composed of 2D and 3D materials for optoelectronic devices has paved the way for advancements in broadband optical imaging. However, fabricating traditional array-based imaging detectors with these materials remains challenging. Cadmium sulfide (CdS), a historically significant semiconductor material, has been extensively used in optoelectronic devices due to its remarkable photoelectric properties and chemical stability. Notably, a unique type-I heterojunction can be formed by combining 2D CdS, prepared through chemical vapor deposition, with the first-generation semiconductor germanium (Ge). His heterojunction photodetector exhibits outstanding photoelectric performance, achieving a responsivity of 54 mA W −1 and a detectivity of 1.4 × 10 9 Jones under zero bias, with a spectral response range spanning from 265 to 1550 nm. Herein, the CdS/Ge heterojunction photodetector with the emerging single-pixel Hadamard algorithm, addressing challenges in nonvisible imaging that conventional imaging systems traditionally encounter, is integrated. This approach facilitates low-sampling-rate image reconstruction across a broad spectral range and under scattering conditions. It is anticipated that this work will significantly contribute to future advancements in broadband imaging applications.
研究领域:
光学工程
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材料科学
✓ 已验证
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
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光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
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2019
·
IF 3.315
Tao Zhang,Tao Jiang,Zhihong Liu
The N235–TOP–sulfonated kerosene system was applied for the recovery of Ge(IV) from a synthetic sulfuric acid leaching solution of secondary zinc oxide , containing Ge(IV), Zn(II), As(III), Fe(III), Si(IV), and Cd(II). The co-extraction of As(III) with Ge(IV) is a challenging problem in the extraction of Ge(IV) from aqueous solution by N235. However, TOP, as a modifier, suppressed the co-extraction of As(III) significantly. The effects of factors including N235 concentration, extraction time, tartaric acid to Ge(IV) molar ratio and temperature on the extractions of Ge(IV) and As(III) were studied. At an organic/aqueous (O/A) phase ratio of 1/1, aqueous phase pH of 1.2, extraction time of 10.5 min, tartaric acid-to-Ge(IV) molar ratio of 5.0, and temperature of 25 °C, the extraction efficiency of Ge(IV) reached 93.9%, whereas only 1.3% of As(III) was extracted by the 25%(v/v)N235–10%(v/v) TOP–sulfonated kerosene system in a single stage extraction. The Ge(IV) in the raffinate was less than 1.5 mg/L when employing a five-stage continuous countercurrent extraction at an O/A ratio of 1/10. In addition, aqueous NaOH solution of 0.5 mol/L was an appropriate reagent for the stripping of both Ge(IV) and As(III) at an O/A ratio of 1/1 and 25 °C for 10.0 min.
研究领域:
冶金工程
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化学工程
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DOI
高影响因子
Science China-Chemistry
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2024
·Vol. 67
·期 7
·2282-2291
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IF 10.4
Jiao Meichen,Jia Chunmin,Xu Hao,Wu Peng,Zhang Xian-Ming
Ge-containing Lewis acidic zeolites are typically synthesized using a conventional hydrothermal strategy from amorphous silica sources, through a long time- and energy-consuming approach limiting their wide applications. This study reports a rapid synthesis strategy for a series of IWV aluminogermanosilicate zeolites ( T- x -Al ) with a wide range of Si/Ge molar ratios (5–15) by interzeolite transformation of dealuminated FAU (DA-FAU). Notably, Ge-rich IWV could be obtained with crystallization time as short as one day by the equimolecular Si/Ge ratio gel. The effect of synthetic parameters was investigated and the obtained T- x -Al samples were characterized by XRD, SEM, EDS, ICP, 29 Si and 27 Al MAS NMR, FTIR, and N 2 physisorption analyses. Compared with a previously reported IWV germanosilicate (H-3), T- x -Al displayed a better catalytic activity in Baeyer-Villiger (BV) oxidation, attributed to the presence of the active framework Ge sites with the assistance of the extra-framework Al species. The cyclic catalysis tests revealed that the presence of framework Al species contributed to the stability of the T- x -Al . Specifically, T- x -Al , with 14-membered ring (MR) supercages, outperformed the typical 12-MR Sn-beta catalyst in the BV oxidation of large ketone-like 2-admantanone, indicating a promising potential application in the macromolecular catalytic process.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
OPTICS LETTERS
·
2023
·Vol. 48
·期 21
·5471-5474
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IF 3.6
Wenlong Xu,Wenlong Xu,Yongchang Guo,Yongchang Guo,Yongchang Guo,Can Li,Can Li,Jie Fu,Jie Fu,Zhibiao Ma,Zhibiao Ma,Zhifan Hao,Zhifan Hao,Hui Wang,Hui Wang,Hui Wang,Haizheng Tao,Jianqiang Li,Jianqiang Li,Jianqiang Li,Jianqiang Li
We have innovatively introduced the pulsated orifice ejection method into the preparation of glass fibers, successfully preparing high-purity Ge28Sb12Se60 glass fibers. These fibers have a smooth surface, uniform elemental distribution, and excellent bending properties, with a minimal bending radius of 2 mm. In the infrared spectrum from 2.5 to 13.5 µm, the fibers achieve 65% transmission. Additionally, the fibers possess a density of 4.586 g/cm3, a diameter of 35 µm, a glass transition temperature (Tg) of 369°C, and an onset crystallization temperature (Tx) of 557°C. We have also measured the surface tension of the glass fibers, finding values from 0.288 N/m to 0.124 N/m as temperatures rose from 450°C to 500°C. The POEM holds the potential to achieve fiber cores of lengths up to hundreds of meters in theory. Our work provides a distinctive perspective for the preparation of glass fibers.
研究领域:
材料科学
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光学工程
✓ 已验证
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2021
·
IF 4.952
Shihuan Li,Jinhui Li,Senwei Feng,Linlin Bian,Zhuoting Liu,Yunfang Ping,Xu Wang,Ann Van Schepdael
The presence of fatty acid esters of 3-monochloropropane-1,2-diol (3-MCPDE), 2-monochloropropane-1,3-diol (2-MCPDE) and glycidyl (GE) in foods is a potential concern due to their toxicity, especially for infants. This study proposed a rapid, sensitive and environmentally friendly method for simultaneous determination of the 3-/2-MCPDE and GE in breast milk and infant formula using headspace solid-phase microextraction (SPME) and on-fiber derivatization combined with gas chromatography-tandem mass spectrometry (GC-MS/MS). The approach proved high sensitivity with detection limits of 0.10 μg/L and 0.15 μg/kg for MCPDEs in breast milk and infant formula, respectively. Mean recoveries were obtained ranging from 79.9 to 111.2% for breast milk and from 82.1 to 106.7% for infant formula, with relative standard deviation (RSD) of less than 9.5%. According to the levels of 3-MCPDE and GE determined in 30 breast milk and 23 infant formulas, the exposure to 3-MCPDE and GE may pose a potential health risk for infants from birth to <12 months fed by breast milk and infants from birth to 6 months fed by infant formula.
研究领域:
食品安全
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分析化学
·
毒理学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 49
·11486-11493
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IF 5.16
Xinyi Wang,Xijun Xu,Jun Liu,Zhengbo Liu,Jiadong Shen,Fangkun Li,Renzong Hu,Lichun Yang,Liuzhang Ouyang,Min Zhu
Graphical Nanocomposite anodes : Uniform peapod-like Cu 3 Ge/Ge@C composites are fabricated successfully through a facile dopamine-coating and annealing route (see figure). Owing to the homogeneous carbon encapsulation and the addition of the inactive alloying phase Cu 3 Ge, this Ge-based anode exhibits an excellent high specific capacity, outstanding cycle stability, and excellent rate performance for LIBs. As anode materials for high-performance Li-ion batteries, peapod-like Ge-based composites, including Ge, a Li-inactive conducting Cu 3 Ge, and a porous carbon matrix are synthesized simply by annealing CuGeO 3 @dopamine in a H 2 /Ar atmosphere. The introduction of the carbon layer and inactive alloying phase Cu 3 Ge not only enhances the electrical conductivity of the Ge anode, but also reduces the volume change of Ge during the cell cycle as a buffer. In particular, the anode of this peapod-like Cu 3 Ge/Ge@C shows an excellent long cycle life as well as outstanding capacity performance, with a discharge specific capacity up to 934 mA h g −1 after 500 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Hongxiang Chen,Zhilong Zhang,Xiaochun Wen,Ze Zhang,Fa Chang,Jianeng Huang,Yunfeng Su,Hengzhong Fan,Bing Xiao,Yongsheng Zhang
The discovery of out-of-plane ordered (o-MAX) phases has been largely confined to Al-containing systems, leaving a critical gap in understanding chemical ordering mechanisms across other A-element families. Meanwhile, the 413-type Ge-based MAX phases in bulk form are still lacking. Here, we report the first synthesis of bulk Ge-based 413-type MAX phases: Cr 2 Ti 2 GeC 3 , (Cr 1/3 Ti 1/3 Mo 1/3 ) 4 GeC 3 , and (CrTiVMo)GeC 3 , thereby expanding both structural complexity and chemical ordering paradigms in nanolaminate ceramics, and introducing the second series of o-MAX phases. Through combined Rietveld refinement and atomic-resolution elemental mapping, we demonstrate robust Ti-Cr out-of-plane chemical ordering in these phases, with Ti preferentially occupying the inner metal layers adjacent to Ge atoms and Cr populating the outer layers. This chemical ordering pattern is preserved even in quaternary metal compositions. In contrast, the introduced Mo and V are distributed almost randomly at both sites. First-principles calculations demonstrated the thermodynamic stability and electronic structure, and quantified the mechanical properties of Ge-based 413 phases, revealing enhanced mechanical moduli and tunable ductility through V/Mo incorporation. This work expands the o-MAX family beyond Al-based systems, establishing Ge-containing high- n phases as a platform for designing chemically ordered nanolaminates with tailored stiffness-ductility balance.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ke Wang,Jiaqi Yang,Bo An,Qin Zhang,Dongxing Song,Yongqing Wang
This study utilizes the citric acid-EDTA combustion method to synthesize Gd 0.1 Ce 0.9-x Ge x O 1.95 (x = 0.005,0.01,0.04,0.07), marked as nGGDC (n = 0.5,1,4,7), and Gd 0.1 Ce 0.9 O 1.95 (10GDC) composite materials, focusing on electrochemical performance and mechanical properties. The prepared materials all form a cubic fluorite structure. Doping with Ge 4+ increased the densification of the electrolyte, enlarged the grain volume, and reduced the number of grain boundaries, thereby enhancing the dielectric constant. This improvement reduces intragranular resistance and grain boundary resistance, promoting the migration of oxygen ions . The Scavenging Ratio (SR) of Gd 0.1 Ce 0.89 Ge 0.01 O 1.95 (1GGDC) is the highest, reaching 4.1 at 975 K, and the Blocking Factor (∂ t ) of 1GGDC decreases by 52 % compared to 10GDC . 1GGDC exhibits the highest conductivity and the lowest activation energy , increasing by 424 % and decreasing by 20 % compared to 10GDC , respectively. In terms of mechanical properties, compared to 10GDC, 1GGDC samples exhibit improved hardness (10.85 GPa), fracture toughness (3.18 MPa m ½ ), and flexural strength (97.62 MPa). Electrolyte single cells containing 1GGDC demonstrate higher power density and current density, particularly at 1023 K (955 mW/cm 2 vs. 740 mW/cm 2 for 10GDC). According to density functional theory calculations, the oxygen vacancy formation energy, binding energy, and migration barrier of GGDC electrolyte co-doped with Ge and Gd are all lower than those of GDC. Therefore, 1GGDC can be considered as a potential intermediate-temperature solid oxide fuel cells (IT-SOFCs) electrolyte material.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）