Journal of Water Process Engineering
·
2025
·
IF 6.7
Hanjun Wu,Shiyin Gui,Zhenyue Zhang,Wenda Guo,Xiangyi Deng,Junxia Yu
In this work, chitosan was modified by extracting the polyphenols rich in pomegranate peels to prepare the bio-composite material (PPPs-CS), which was applied to capture the dispersed metal germanium (Ge(IV)) in wastewater. The experimental results indicate that PPPs-CS exhibits the best adsorption performance for Ge(IV) at pH 7.0 with a dosage of 0.7 g/L. The adsorption behavior conforms to the pseudo-second-order kinetics and the Langmuir model, with the maximum adsorption capacity fitted by the Langmuir model reaching 71.34 mg/g. The results of dynamic adsorption mass transfer simulations showed that the capture behavior of PPPs-CS on Ge(IV) was dominated by the chemical adsorption of monomolecular layer. The adsorption partition coefficient of PPPs-CS for Ge(IV) with coexisting metal ions of Mn(II), Cd(II), Ca(II) and Ga(III) was as high as 11.23 L/g, exhibiting a selectivity coefficient more than 3.5 times higher than that of competing ions and demonstrating superior selectivity. After five adsorption-desorption cycles, the capture rate was still greater than 87 %. DFT calculations indicated that the uptake of Ge(IV) by PPPs-CS might be due to the ion exchange and complexation between the catechol groups on the surface of the PPPs-CS and Ge(OH) 4 . The pomegranate peel polyphenols could effectively improve the diversity and chemistry of the active sites for Ge(IV) binding by chitosan and enhance the specific recognition performance for Ge(IV). Overall, PPPs-CS has significant advantages and potential as environmentally friendly and cost-effective materials for the recovery of Ge(IV) from wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
废水处理
·
重金属回收
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 26.8
Chao Xie,Deng Ke,Shunzi Li,Yuhang Shan,Can Fu,Xingang Ren,Liangpan Yang,Wenhua Yang,Zhixiang Huang
Multi-functional optoelectronic devices that integrate the capacities of neuromorphic processing and photodetection are of pivotal importance for advancing optoelectronic techniques. Here, we present a dual-functional optoelectronic device based on a multi-heterostructure of Cs 3 Cu 2 I 5 /graphene/Ge, which realizes high-performance deep-ultraviolet (DUV) synaptic behavior and self-driven near-infrared (NIR) photodetection simultaneously. On one hand, the device leverages the photogating effect in the Cs 3 Cu 2 I 5 /graphene heterostructure to produce persistent photo-conductivity, emulating synaptic behavior upon DUV light stimulation. Electron trapping by introducing B 4 PyMPM as capture sites significantly promotes spatial divorcement of photocarriers, guaranteeing remarkably improved synaptic characteristics. The utilizations in DUV fingerprint recognition with an accuracy of 97.8%, and optoelectronic reservoir computing with recognition accuracy reaching 100% for three 4-bit numbers are demonstrated. On the other hand, the device utilizes the photovoltaic effect in the graphene/Ge heterostructure to generate photoresponse at zero working bias, enabling self-driven photodetection upon NIR light illumination. The wide-bandgap Cs 3 Cu 2 I 5 functions as an effective NIR anti-reflection layer to induce a strong light trapping effect, giving rise to boosted photoresponse properties. The excellent photoresponse supports the device in performing single-pixel NIR optical imaging. It is believed that this work is inspiring to the design of high-performance multi-functional optoelectronic devices toward integrated and intelligence applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2015
·
IF 2.561
Jingyun Yin,Xiayin Yao,Gang Peng,Jing Yang,Zhen Huang,Deng Liu,Yicheng Tao,Xiaoxiong Xu
The effect of solid electrolytes , i.e. Li 10 GeP 2 S 12 and Li 3.25 Ge 0.25 P 0.75 S 4 , on the rate and low temperature performances of LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) cathode in all solid state lithium batteries is investigated. The ionic conductivities for the synthesized Li 10 GeP 2 S 12 and Li 3.25 Ge 0.25 P 0.75 S 4 at room temperature (RT) are 8.27 × 10 − 3 and 2.03 × 10 − 3 S cm − 1 , respectively. These solid electrolytes are demonstrated as electrolytes for all solid state lithium batteries containing NCA cathode for the first time. The results show that Li 10 GeP 2 S 12 based battery exhibits superior rate performance (72.3 mAh g − 1 at 1 C, RT), cycling stability (capacity retention of 87.1% after 30 cycles at 0.1 C, RT) and low temperature performance (79.2 mAh g − 1 at 0.1 C and − 10 °C), which can be ascribed to its higher ionic conductivity and lower interfacial resistance between Li 10 GeP 2 S 12 and NCA cathode. It is indicated that all solid state lithium batteries with NCA cathode and Li 10 GeP 2 S 12 solid electrolyte can realize its potential application in high power and low temperature conditions.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yonghui Yan,Yang Liu,Yongguang Zhang,Chunling Qin,Zhumabay Bakenov,Zhifeng Wang
Due to huge volume expansion and poor electrical conductivity, the commercial application of the promising Germanium (Ge) anode is restrained in lithium ion battery (LIB) field. Generally, conductive metals can improve the electron mobility in Ge. In that way, whether active materials or conductive metals account for a higher proportion in the anode is controversial in this field and needs to be clarified urgently. Herein, three Ge-based anodes with different ratios in conductive Ag are fabricated by a facile melt spinning and one-step dealloying method. It is found that Ag nanoparticles embedded three-dimensional nanoporous Ge (Ag/np-Ge) electrode with high active material ratio exhibits the best cycling stability among tested samples, delivering a high capacity of 953 mAh g −1 after 100 cycles at a current density of 100 mA g −1 and an excellent reversible capacity of 522 mAh g −1 after 200 cycles even at the high current density of 1000 mA g −1 . The enhanced cycling stability can be attributed to the synergistic effect of nanoporous network-like structure and embedded Ag nanoparticles. A dramatical increase in electrical conductivity and activity of Ge by doping of Ag is confirmed by density functional theory (DFT) calculations. The work provides us an idea to rationally design the three-dimensional structure of active materials assisting with a proper ratio of conductive metals, which may promote the development of promising Ge anodes for LIBs with excellent cycling stability.
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
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Misganaw Alemu Zeleke,Dong-Hau Kuo
The quaternary chalcogenide Cu 2 Zn(Sn 1-x Ge x )(S,Se) 4 bulks, where x is G e / [ G e + S n ] molar ratios of 0, 0.15, 0.30, and 0.45 were synthesized via reactive liquid phase sintering at 600 °C for 30 min in the tube furnace and characterized systematically. Together with Sb 2 S 3 as a reactive liquid phase sintering aid, the effects of Ge incorporation on densification, grain boundary, crystal phase purity, crystalline size, and electrical properties were studied. The morphology of the resulted Cu 2 Zn(Sn 1-x Ge x )(S,Se) 4 bulk was found to be more densified and compacted at G e / [ G e + S n ] molar ratio of 0.15 compared to the rests. The X-ray diffraction peaks were shifted towards a higher angle as Ge fraction was increased. The hole concentrations for the entirely p-type bulks were determined to be 3.67 × 10 18 , 1.40 × 10 18 , 1.28 × 10 18 , and 8.90 × 10 17 cm −3 at G e / [ G e + S n ] molar ratios of 0, 0.15, 0.30, and 0.45, respectively. The effects on conductivity and mobility were consistent with their interrelations. Hence, the synthesis and study of Ge incorporated Cu 2 ZnSn(S,Se) 4 bulk using powder technique allows identifying the composition which is expectedly more important for the fabrication of thin film solar cells.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Wei Liu,Zhaoliang Wu,Yanji Wang,Huijie Zheng,Hao Yin
At present, the large scale application of batch foam fractionation is still in confrontation with many problems and difficulties, especially for the enrichment of non-surface-active materials. It is difficult to select a suitable surfactant as the collector when a non-surface-active material can only form a stable association with the expensive surfactants or has not any interactions with the commercially available surfactants. The objective of this work was to investigate the feasibility of batch foam fractionation for recovering such a non-surface-active material, puerarin. Yam mucilage, an abundant byproduct from the manufacture of yam starch, was used to generate a stable foam phase based on its good foamability. According to the properties of puerarin and yam mucilage, β -cyclodextrin ( β -CD) was selected as a basic material to establish an association between them. The results of fluorescence sensitization experiments indicated that puerarin could form an equimolar inclusion complex with β -CD and the inclusion constant was 405.8. Subsequently, β -CD was modified by introducing carbon disulfide and copper (Cu) ion. Then, puerarin could be adsorbed on the gas-liquid interface in the form of ternary complex with modified β -CD-Cu ion complex and glycoprotein molecules (see Fig. 7). Batch foam fractionation was carried out by using the crude extracting solution as the initial feeding solution, in which the concentration of puerarin was as high as 4.6 g/L. Under the suitable conditions of temperature 50 °C, pH 6.0, loading volume of feed solution 400 mL, the pore diameter of gas distributor 0.450 mm, additive volume of yam mucilage 30 mL and volumetric air flow rate 100 mL/min, the enrichment ratio and the percent recovery of puerarin were 4.3 and 82.3%, respectively. This strategy could be generalized to the separation of various non-surface-active materials due to the low cost and the diversiform cavity dimension of cyclodextrins.
研究领域:
植物化学
·
分离工程
·
天然产物开发
✓ 已验证
DOI
高影响因子
Carbon Energy
·
2026
·
IF 21.4
Pubao Peng,Yang Geng,Jiajun Nan,Song Li,Dewei Zhang,Qing Lin,Yaru Gong,Guodong Tang
Polycrystalline SnSe has attracted significant attention due to its facile processing, machinability, and scale-up application. However, n-type polycrystalline SnSe consistently exhibits inferior thermoelectric performance compared to p-type polycrystalline, because SnSe is an intrinsic p-type semiconductor. Here, we promoted the thermoelectric performance of n-type polycrystalline SnSe through manipulating the band structure and dislocations. The band convergence and enhanced density of states in the electronic structure of SnSe promoted by Pb/Ge/Br codoping, lead to significant enhanced Seebeck coefficient. The carrier concentration was simultaneously enhanced through Ge/Pb/Br codoping. The combination of a large Seebeck coefficient and the enhanced electrical conductivity gives rise to a high power factor as high as 7.47 μW cm −1 K −2 at 873 K. Furthermore, we found that dopants induce strong atomic strain disturbance in the SnSe matrix because of large differences in atom radius with host elements, leading to the formation of high-density dislocations. The presence of dislocations and nanoprecipitates forms strong phonon scattering centers, effectively scattering phonons and suppressing lattice thermal conductivity. As a result, a high peak ZT of 1.6 has been obtained in n-type Sn 1.04 Ge 0.02 Pb 0.02 Se 0.97 Br 0.03 .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2013
·
IF 2.947
Yan Yan,Cheng-Zhi Chai,Da-Wei Wang,Xin-Yi Yue,Dan-Ni Zhu,Bo-Yang Yu
Ge-Gen Decoction (GGD) is a classical formula of traditional Chinese medicine. It is generally used for treating common cold, fever and influenza in China and South East Asia. In this study, a systematic method was established for the qualitative and quantitative analysis of the major constituents in GGD. For qualitative analysis, a method of liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry (Q-TOF MS/MS) was developed for identification of multi-constituents. Based on the UV spectra, retention time and MS spectra, sixty compounds in GGD extract were identified or tentatively characterized by comparing with reference substances or literatures. According to the qualitative results, a new quantitative analysis method of GGD was established by HPLC-DAD. Fourteen representative compounds unequivocally identified were chosen as marker components which were derived from five herbs in GGD excluding Zingiberis Rhizoma Recens and Jujubae Fructus. The analytical method was validated through intra- and inter-day precision, repeatability and stability, and the R.S.D. was less than 3.18%, 4.48%, 3.36% and 3.54%, respectively. The LODs and the LOQs for the analytes were less than 1.06 and 3.12 μg mL −1 , respectively. The overall recoveries ranged from 94.8% to 105.6%, with the R.S.D. ranging from 0.68% to 3.23%. Then the new method was applied to determine twelve batches of GGD commercial products of three dosage forms. The results indicated that the new approach was applicable in the routine analysis and quality control of GGD products. The study might provide a basis for quality control of GGD, and further study of GGD in vivo .
研究领域:
中药学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 25
·9728-9734
·
IF 4.569
Dong Zhang,Shen-Jing Ji,Yu Cao,Nian-Tzu Suen
In this work, we have demonstrated that one can control the intrinsic activity of Ni metal toward the hydrogen evolution reaction (HER) by simply alloying Ni with different elements (i.e. Ti, Ge or Sn). The HER activities of Ni3M (M = Ti, Ge and Sn) series and Ni metal follow the order of Ni3Ti (η10 = 68 mV) > Ni3Sn (η10 = 122 mV) > Ni3Ge (η10 = 161 mV) > Ni (η10 = 273 mV). After normalizing their HER performances based on the roughness factor (RF), it was realized that Ni3Ti and Ni3Sn both exhibit higher intrinsic HER activities than that of Ni metal while Ni3Ge displays the worst HER performance. This trend was later rationalized by using density functional theory (DFT) calculation, which showed that blending Ni with Ti, Ge or Sn elements will alter the corresponding electronic structure and bonding scheme. Such a change in the bonding scheme (i.e. bonding state or antibonding state) will influence the adsorption energy of the H atom (ΔGHad) on an active site and is the main cause of the synergetic effect that results in the different HER efficiencies of Ni3M (M = Ti, Ge and Sn). Through the present case study, it was recognized that alloying is a simple yet effective strategy to promote the HER activity of an electrocatalyst. With a suitable combination between elements, it helps single metals (e.g. Co or Ni metal) exceed the limits on their intrinsic HER activities and has the potential to replace noble metals (e.g. Pt, Ir and Ru) in the future.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Yuanhao Chen,Xiaoshan Zhang,Yirong Liu,Haisheng Liu,Dechao Yu,Dawei Zhang
Gadolinium gallium garnet has been emerging as a starlet for preparing efficient luminescent materials, while via crystal field engineering the luminescence properties of rare-earth activator in its solid solution phosphors were scarcely explored. In this work, Er 3+ -doped Gd 3 Zn x Ga 5-2x Ge x O 12 (GZG 5- 2x G:Er 3+ ) solid solutions were prepared by high-temperature solid-state reaction, where a hetero-valent co-substitution strategy was implemented via introducing Zn 2+ /Ge 4+ pair to replace 2 Ga 3+ sites. X-ray diffraction Rietveld refinements confirm all samples crystallized into pure garnet phase. Upon 381 nm excitation, Er 3+ concentration was spectrally optimized to be about 10%, substituting the Gd 3+ sites, and via the Zn 2+ /Ge 4+ co-substitution, luminescence intensity of GZG 2 G:10%Er 3+ increases by more than 3 times in comparison with that of the baseline GZGG:10%Er 3+ sample. All the GZG 5-2x G:10%Er 3+ solid solution samples color in bright green under illumination using an ultraviolet ~ 365 nm lamp.Thermometric properties of Er 3+ 2 H 11/2 -4 S 3/2 thermally coupled levels of were systematically studied on basis of fluorescence intensity ratio principle. The GZG 5-2x G:10%Er 3+ all can perform temperature sensing over a wide temperature range of 298-573 K with a maximum relative sensitivity (S r ) above 1.20% K -1 and an applicable minimum temperature resolution (δT) around 0.4 K. Continuous exploration of solid solution-manipulating luminescent properties would develop novel thermometry probes (particularly for activator with spin-allowed transitions) with higher S r and smaller δT for practical optical temperature sensing.
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
Misganaw Alemu Zeleke,Dong-Hau Kuo,Osman Ahmed Zelekew,Albert Daniel Saragih
Ge-substituted Cu 2 Sn(S,Se) 3 bulks with Cu 2 (Sn 1- x Ge x )(S,Se) 3 formula at x = 0, 0.25, 0.50, 0.75, and 1.0 were synthesized by reactive liquid phase sintering , where the heating process was held at 200 °C for 20 min before reaching the sintering temperature of 600 °C for 30 min. In the presence of volatile Sb 2 S 3 sintering aid , the effects on densification , grain boundary, crystalline size, and electrical properties of Ge-substitution were investigated. Cu 2 (Sn 1- x Ge x )(S,Se) 3 showed p-type behavior for all x values. It was found that the mobility was increased sharply and carrier concentration was decreased rapidly as the x -value was increased. The electrical conductivities were found to be 14.0, 22.7, 36.8, 126, and 153 S/cm at x = 0, 0.25, 0.50, 0.75, and 1.0, respectively. X-ray diffraction (XRD) peaks were shifted to the higher angle and band gaps increased upon successive increasing of the Ge/[Ge+Sn] fraction being 1.19, 1.21, 1.22, 1.24, and 1.26 eV at x = 0, 0.25, 0.50, 0.75, and 1.0, respectively. The studies of Ge-x-CTSSe bulks were based on Ge Sn defects and supported by the data of morphological, structural, electrical, and optical properties .
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 19
·4520-4527
·
IF 6.813
Jian Hao,Jun Bai,Jing Wang,Lu Xu,Junli Guo,Caixia Chi,Haihong Li
The large volume changes of Ge-based electrode result in poor electrochemical cycling and rate performance and are the important factors hampering the practical implementation of Ge-based materials in Li-ion batteries (LIBs). Here we fabricated a fascicular structure Ge/Zn2GeO4 (Ge/Zn2GeO4NFs) by an in situ growth of flower-like Zn2GeO4 on micron-sized Ge. In an EDTA/water solvent system, Zn2GeO4 were generated on the Ge substrate, and self-assembled into a flower-like structure through coordination and H-bonding. Benefiting from the improved structural stability and abundant transmission channels of lithium ions and electrons, the as-fabricated Ge/Zn2GeO4NFs anodes exhibited excellent cyclability and rate performance. At a current density of 0.2 A g−1, Ge/Zn2GeO4NFs delivered a high capacity of 1621 mA h g−1 with an initial coulombic efficiency of 62%, and even after the 200th cycle a capacity of 816 mA h g−1 could be maintained. Further, the Ge/Zn2GeO4NFs anode delivered excellent rate capabilities of 567 and 388 mA h g−1 at high current densities of 2 and 5 A g−1, which were superior to the micron-sized Ge electrode (133 mA h g−1 at 5 A g−1). The results show that the Zn2GeO4 nanoflower, which adheres on the micron Ge substrate inseparably, could buffer the volume change of Ge, enlarge the electrolyte contact area, provide continuous lithium-ion and electron pathways, and thus improve the lithium-storage performance of the micron-sized Ge electrodes. This synthesis strategy provides new ideas for the development of micron-sized anode materials for LIBs.
研究领域:
材料科学
·
能源存储
✓ 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）