CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Min Zhao,Dong-Lin Zhao,Hui-Xian Yang,Xin-Yao Han,Ya-Jing Duan,Xin-Min Tian,Wen-Jie Meng
Germanium-based materials are considered to be an alternative material for high energy density lithium-ion battery anodes due to their superior theoretical capacity. However, the severe volume expansion during the lithium insertion and the easily agglomerated tendency of Ge nanoparticles become the key obstacles to the stable cycle and capacity retention of Ge anodes. Herein, we designed a double-layered protective structure in which the cubic hollow Ge@C hybrids are uniformly dispersed on reduced graphene oxide sheets (Ge@C-rGO) through conventional dopamine-coated precursor and subsequent carbothermal reduction processes. In the synthesized Ge@C-rGO hybrids, the large-area rGO sheets cooperate with the amorphous carbon layer to accommodate and buffer the volume expansion of Ge particles, and to ensure that the Ge nanoparticles are in a separated state to the utmost extent. The Ge@C-rGO electrode which is employed in lithium-ion battery owns the reversible capacities of 1183 mAh·g −1 at the specific current of 100 mA g −1 and 710 mAh·g −1 at 1 A g −1 for 200 cycles. In addition, it exhibited good cycle stability, rate reversibility and electronic conductivity, and is a potential anode material with high performance and long-cycle capability.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Zepeng Li,Shixin Liu,Mingrun Du,Jinhua Wang,Gyaneshwar P. Srivastava,Mingchao Wang,Tong Wei,Yunling Zou,Ningru Xiao,Qingjun Zhou
Eu and Y co-doped ZrO 2 is fabricated by solid state reaction method. ZrO 2 /Eu/Y products evolve from the monoclinic phase to the monoclinic/cubic phase in structure as the Eu ion content increases. Monoclinic/cubic heterophase junction is obtained during structural evolution, which develops a new route to fabricate ZrO 2 heterophase junction. Photocatalytic property measurement is carried out for ZrO 2 /Eu/Y materials. The ZrO 2 /Eu 0.1 /Y monoclinic/cubic heterophase junction promotes photogenerated electron-hole separation effectively and hence exhibits better photocatalytic performance.
研究领域:
材料科学
·
化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Chengyuan Yang,Jing Wang,Rong Wang,Wenxin Zhu,Liang Zhang,Ting Du,Jing Sun,Ming-Qiang Zhu,Yizhong Shen,Jianlong Wang
Multi-pollutants environment coexisted organic and inorganic pollutants has become a common phenomenon, seriously affecting water biodiversity and human water security. Currently, the removal of organic and inorganic pollutants by photocatalysis are mostly in own single-pollutant environment, not in multi-pollutants system, where the common photocatalysts cannot achieve efficiently charge separate and transfer with low reactive oxygen species (ROS) efficiency. Herein, we constructed an efficient cascaded Z-scheme heterojunction Co 9 S 8 @defective ZnS/g-C 3 N 4 (C@DZ/N) composed of defective engineering in hollow nanocubes, which achieved excellent photodegradation activity (98.93 % for ciprofloxacin (CIP) and 97.18 % for Cr(VI) at 90 min) in multi-pollutants environment, significantly higher than the hollow cubic with Z-scheme heterojunction in single-pollutant environment (98.07 % for CIP and 98.72 % for Cr(VI) at 140 min). Defective ZnS acts as the core for direct charge transfer and separation to form a unique cascaded Z-scheme heterojunction system that blocks the type II charge transfer pathway to achieve ultra-efficient charge transfer. Furthermore, the structural characterization and ROS experimental results based on multi-pollutants models show that the cascade Z-scheme system greatly facilitates the ROS release kinetics and further leads to more electron-deficient cubic surfaces while increase the directional conversion to singlet oxygen ( 1 O 2 ) in multi-pollutants environment. Further tests of intermediates and reusability indicated its potential for the high-efficient treatment of multiple pollution systems.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Jiajun Liu,Youshen Wu,Yao Yu,Ke Li,Yuanyuan Ji,Daocheng Wu
A novel protocol is developed to prepare quantum dot (QD)/Ir(III) complex glycerol monoolein (GMO) cubic-phase nanoparticles (Qd/Ir GMCPNPs) as hypoxia nanoprobes, in which hypoxia probe Tris [1-phenylisoquinoline-C2, N] Iridium(III) [Ir(piq) 3 ] and the reference QDs are separately loaded at hydrophilic and hydrophobic channels to avoid interference. Qd/Ir GMCPNPs were nearly spherical in shape, with an average size of 20–30 nm. Their phosphorescence spectra showed that nanoprobes have a wide excited wave length range of 360–500 nm, which is suitable for different types of measurement instruments . When the oxygen content decreased from 21% to 1%, the luminescent intensity ratio of Qd/Ir GMCPNPs in the solution and cells increased 4-fold and 2.8-fold, respectively, with an acceptable linear relationship. Particularly, extensive preliminary quantitative ratiometric oxygen sensing and long tumor imaging monitoring can be achieved with these nanoprobes.
研究领域:
生物医学工程
·
纳米医学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2015
·
IF 6.409
Hongmin Ma,Yan Li,Yulan Wang,Lihua Hu,Yong Zhang,Dawei Fan,Tao Yan,Qin Wei
In this work, an ultrasensitive sandwich-type electrochemical immunosensor was developed for the quantitative detection of prostate specific antigen (PSA). Gold nanoparticles decorated 3-aminopropyltriethoxysilane functionalized graphene sheets (Au@APTES-GS) with a large specific surface area, good biocompatibility and superior electron transfer ability were employed as the matrix. In addition, cubic Cu 2 O nanoframes with hollow edges were employed as the label for the first time. Scanning electron microscope (SEM) images were used to confirm the nanostructure of Au@APTES-GS and Cu 2 O. Using square wave voltammetry (SWV) to monitor the electrocatalytic process, the signal amplification mechanism of the matrix and the label were explored successfully. Here we find that the unique edge-truncated structure of Cu 2 O nanoframes can load with a larger amount of redox mediators , ferrocenecarboxylic acid (Fc-COOH), offering a higher electrochemical signal response. Apart from that, Cu 2 O nanoframes have a good electrocatalytic activity towards the Fc-COOH and hydrogen peroxide (H 2 O 2 ), making a contribution to further enhance the sensitivity of the fabricated immunosensor. Under optimal conditions, the proposed immunosensor achieved an ultrasensitive and specific detection of PSA, and displayed acceptable reproducibility, selectivity and stability. This work may provide an effective method for the clinical monitoring of tumor markers and demonstrate the potential application promising of nanoframes in the fabrication of immunosensors.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Yurong Ren,Jiawei Wang,Xiaobing Huang,Jianning Ding
The electrochemical performance of a material varies with its structural phase transition. It is found that the rhombohedral Fe 2 O 3 can transform to the cubic Fe 3 O 4 via a calcination treatment in a nitrogen atmosphere, and lithium-ion storage performances of Fe 3 O 4 get an obvious improvement due to its structural advantages. On the basis of data calculated by X-ray diffraction, the larger unit cell volume as well as the higher void fraction of cubic Fe 3 O 4 provides lithium-ions with more transport channels for Li ions diffusion and storage without serious volume change, and thus the cubic Fe 3 O 4 delivers an excellent reversible capacity of 921.1 mAh g −1 after 15 cycles at the current density of 50 mA g −1 , which is much higher than 328.3 mAh g −1 for the rhombohedral Fe 2 O 3 . To further enhance the structural stability of electrodes, reduced graphene oxide is introduced. The Fe 3 O 4 /reduced graphene oxide show an excellent specific capacity of 825.3 mAh g −1 after 40 cycles and impressive rate performance of 600 mAh g −1 at the current density of 400 mA g −1 , which are much higher than that of Fe 3 O 4 (417 and 300 mAh g −1 ), Fe 2 O 3 (137.4 and 95 mAh g −1 ) and Fe 2 O 3 /reduced graphene oxide (390.1 and 480 mAh g −1 ). These results demonstrate that the structural phase transition and reduced graphene oxide of Fe 3 O 4 /reduced graphene oxide composites offer unique characteristics suitable for high-performance energy storage application.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Hangjun Zhang,Yunyi He,Mengfan He,Qiyue Yang,Guoyi Ding,Yuanshuai Mo,Zhiquan Liu,Panpan Gao
Sulfate radical mediated advanced oxidation processes (SR-AOPs) have emerged as a promising alternative for emerging contaminants degradation. However, high activity and great stability are commonly difficult to juggle, and the structure-activity correlations are still ambiguous. This study constructed the cubic CaTiO 3 perovskite modified by highly-dispersed cobalt for peroxymonosulfate (PMS) activation to improve the specific lattice plane exposure and reduce the metal leaching simultaneously. 98% of amitriptyline (AMT) degradation was achieved within 60 min under the condition of 200 mg/L Co0.1-CTO and 100 mg/L PMS . The results indicated that surface Co 2+ /Co 3+ redox couple and lattice oxygen were responsible for PMS activation, and the evolution of · OH, SO 4 ·- and 1 O 2 were revealed. According to density functional theory (DFT) calculations, the highly-dispersed Co on cubic surface effectively captured PMS and promoted electron transfer for the generation of · OH and SO 4 ·- , while more oxygen atoms exposed on Co0.1-CTO(200) surface facilitated the generation of 1 O 2 . Briefly, this study provides a novel strategy of catalyst synthesis in PMS activation for water treatment .
研究领域:
环境科学
·
催化材料
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2025
·
IF 3.2
Liang Cai,Shurui Shang,Haifeng Xue,Xin Hu,Qiang Qi,Guangna Luo,Yingchun Zhang
Li 2 TiO 3 -Li 4 SiO 4 biphasic ceramic has attracted increasing attention because of its unique advantages for tritium breeding in fusion reaction. To overcome the critical limitations of conventional Li 2 TiO 3 -Li 4 SiO 4 pebbles, particularly their inadequate mechanical strength and low packing density, this work developed high-performance Li 2 TiO 3 -Li 4 SiO 4 cubic units via digital light processing (DLP). The purge gas flow behavior in stacked cubic unit structure was studied by Computational Fluid Dynamics (CFD) method to evaluate its structural characteristics. The photosensitivity and rheological properties of precursor suspension were studied to verify the printing feasibility. Solid loading and sintering process were optimized to yield the defect-free Li 2 TiO 3 -Li 4 SiO 4 cubic unit. The results show that the purge gas had periodic velocity distribution and extremely low pressure drop in the stacked cubic unit structure. Li 2 TiO 3 -Li 2 SiO 3 -Li 2 CO 3 ceramic suspension possessed suitable photosensitivity and thixotropy, and its optimal solid loading was 40 vol%. After sintering at 1100 °C, the Li 2 TiO 3 -Li 4 SiO 4 cubic unit with high relative density (92.8 %TD), high crush load (2000.3 N) and favorable open-pore structure can be prepared. Comparative analyses of Li-based cubic units indicate that the Li 2 TiO 3 -Li 4 SiO 4 cubic unit not only addresses the limitations of single-phase variants but also demonstrates superior intrinsic characteristics, including excellent mechanical& thermomechanical properties and distinct hydrogen isotope release behavior. This work proves the feasibility of Li 2 TiO 3 -Li 4 SiO 4 biphasic strategy and potential of Li 2 TiO 3 -Li 4 SiO 4 cubic units for the future tritium breeding design.
研究领域:
材料科学
·
核工程
·
增材制造
·
陶瓷材料
·
聚变能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Chaojiang Fan,Rong Yang,Yun Yang,Yuanyuan Yang,Yong Huang,Yinglin Yan,Lisheng Zhong,Yunhua Xu
Although lithium-sulfur batteries (LSBs) are an attractive next-generation rechargeable battery with high theoretical energy density (2600 Wh kg −1 ) and specific capacity (1675 mA h g −1 ), the shuttle of soluble lithium polysulfides (LiPSs) is still the protruding obstacle to accelerate the redox reaction of LSBs. Here, cubic cobalt diselenide@carbon (CoSe 2 @C) derived from zeolite imidazole framework-67 (ZIF-67) was employed as the functional coating of polypropylene (PP) separator to efficiently adsorb and catalyze polysulfides, inhibit “shuttle effect” and improve the electrochemical reaction kinetics of LSBs. The CoSe 2 @C offers larger mesopore proportion of 77.19 % and abundant active sites to ensure space as a secondary reaction region, and infiltration of electrolyte and rapid transport of Li + . The involved adsorption and catalysis effect are discussed by static adsorption experiment, XPS, and Li 2 S nucleation kinetics analysis. The results show that CoSe 2 @C exhibits strong adsorption effect and catalytic activity on LiPSs, and CoSe 2 @C/PP cells display fast Li + diffusion and improved redox kinetics (high Li 2 S nucleation peak current of 0.27 mA and deposition capacity of 148.46 mA h g −1 ). Ascribe to these advantages, the CoSe 2 @C/PP cell provides an initial discharge specific capacity of 1335.01 mA h g −1 at 0.1 C and a fine reversible capacity at 5.0 C, and achieves stable and durable lifespan with an average capacity decay rate of 0.12 % over 400 cycles at 0.5 C. This work could promote the practical application of metal selenides in the key components and devices for LSBs.
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
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Wenming Liao,Wanfei Li,Jianhua Tian,Qingbo Xiao,Mimi Dai,Guoguang Xu,Yanfang Li,Hongzhen Lin
A rational strategy for the synthesis of ternary cubic phase Zn 2 Ti 3 O 8 solid spheres has been developed for application in lithium ion batteries . In this process, titanium glycolate solid spheres are used as nanostructure template and titanium source, whose functional groups are replaced by zinc ions through a solvothermal ion exchange method in accordance with the Zn/Ti atomic ratio of 2:3. When adjusting the Zn/Ti atomic ratios to 0:3, 1:3, the anatase TiO 2 solid spheres and multiphase complex of TiO 2 /ZnTiO 3 solid spheres can be obtained. However, with the increasing of Zn/Ti atomic ratio to 3:3, in addition of cubic phase Zn 2 Ti 3 O 8 solid spheres, a lot of hexagonal ZnO nanoparticles are synthesized. As anodes for lithium ion batteries, the delivered capacities of Zn 2 Ti 3 O 8 solid spheres are higher than those of TiO 2 and TiO 2 /ZnTiO 3 solid spheres at 300 mA g −1 . Notably, the high purity cubic phase Zn 2 Ti 3 O 8 solid spheres can still release a reversible capacity of 146.7 mAh g −1 even at 2000 mA g −1 over 1000 cycles. Also, the Zn 2 Ti 3 O 8 solid spheres show a good electrochemical performance in the full cells. The superior electrochemical properties are ascribed to the favorable crystal structure and highly developed porous structure of Zn 2 Ti 3 O 8 solid spheres.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 7
·3500-3510
·
IF 5.503
N. Angulakshmi,R. Baby Dhanalakshmi,Paulina Półrolniczak,Mariusz Walkowiak,Pengfei Xie,Xiaohui Tian,Yingke Zhou,A. Manuel Stephan
Controlling the shuttling of lithium polysulphides (LiPS) to enhance the utilization of elemental sulfur has been considered as an important issue to improve the energy density and coulombic efficiency of lithium–sulfur batteries. The present work is aimed at demonstrating a simple preparation of a bi-functional trilayer membrane by coating Li7La3Zr2O12 and activated carbon on either side of the commercial membrane (Celgard 2320). The coated membrane was characterized by ionic conductivity, thermogravimetric and contact angle analyses. In the trilayer membrane, each component acts for a particular purpose: the activated carbon not only acts as a barrier for the migration of polysulfide but also provides additional pathways for electron transport for the insulating sulphur cathode, while the porous Celgard separator facilitates the migration of lithium ion, and the Li7La3Zr2O12 not only promotes the lithium ion migration by percolation but also prevents polysulfide shuttling via the electrostatic repulsive force. The coated membrane offered higher ionic conductivity and thermal stability compared to the uncoated one. The lithium–sulfur battery with the coated separator delivered higher specific discharge capacity than the uncoated separator. XPS studies revealed the absence of polysulfide deposition on the lithium metal surface after the charge–discharge cycling, which further confirms the suppression of polysulfide shuttling by permselective membranes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Jin Liang,Jiawen Sun,Yinjun Li,Dong Zhou,Siying Zhu,Pei Liu,Zhaofan He,Huimin Liu,Jie Kong
The ever-growing electromagnetic pollution from modern technology calls for high-performance wave-absorbing materials that master the delicate balance between impedance matching and attenuation capability—a balance missed by conventional heterojunctions due to their sluggish carrier kinetics and performance trade-offs. Herein, we propose a multi-scale design strategy integrating Mott–Schottky heterojunctions within a hollow cubic CoFe@carbon architecture. Work function disparity between Co 0.7 Fe 0.3 and carbon drives the formation of a built-in electric field, accelerating charge relaxation and enabling significant spatial charge migration. The directional movement of these charges under high-frequency electromagnetic fields effectively attenuates incident energy—critical for broadening the absorption bandwidth—while the hollow cubic morphology optimally tunes the impedance matching, essential for achieving a wide effective absorption band. This synergy between interfacial electric fields and structural features successfully breaks the conventional attenuation-matching compromise. Consequently, the optimized material achieves a remarkable ultra-wide EAB of 7.76 GHz at 2.5 mm and RL min of −43.22 dB. Theoretical calculations confirm that the remarkable electromagnetic wave absorption performance originates from a synergistic effect, revealing the critical roles of enhanced interface polarization driven by the Mott–Schottky effect, well-optimized conductive networks, and excellent impedance matching endowed by the unique hollow cubic structure. This strategy offers profound insights into addressing the fundamental limitations of traditional absorbers and paves a promising way for developing next-generation high-performance EM functional materials.
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
能量转换与存储
·
应用物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）