Energy Storage Materials
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2021
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IF 17.789
Qiushi Wang,Tao Meng,Yuhang Li,Jindong Yang,Binbin Huang,Shanqiang Ou,Changgong Meng,Shanqing Zhang,Yexiang Tong
The development of stable, high-energy electrode materials for lithium ion-batteries requires an elaborate effort to optimize the active materials as well as the chemical bonds and electron/ion transport in the electrode. However, hindered by the intrinsic structure and electrochemical degradation which is attributed to the volume expansion of materials, an increase in battery safety and reliability is concerned. Here, taking silicon as an example, we propose a strategy to stabilize this anode by successive chemical bonds reconstructing the surface. In this study, silicon nanoparticles are assembled in a carbon-copper framework via a facile and scalable pyrolysis process to provide a short-range electron transfer and pulverization suppression. Dissimilar to the current carbon coating methods, with the aid of Cu-O-C, Si-O-C, and Si-C chemical bonds, silicon hybridized reduced graphene oxide (rGO) and double-faced adhesive tape derived carbon composite (Si+rGO@DFAT-C) exhibits high structural integrity and immune to delamination. Hence, it demonstrates superior capacity (1536 mAh g −1 at 0.1 A g −1 ), high rate capability (1126 mAh g −1 at 2 A g −1 ), and stable electron stability (968.1 mAh g −1 after 200 cycles at 0.5 A g −1 ). This study emphasizes the crucial importance of well-tailor surface chemical bond reconstruction for the anode stabilization for high-performance LIBs.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
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2020
·Vol. 49
·期 31
·10970-10976
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IF 4.174
Xianqiang Huang,Yuquan Qi,Yuxiao Gu,Shuwen Gong,Guodong Shen,Qiang Li,Jikun Li
A synthetic pathway for the directed preparation of three novel polyoxovanadate-based copper frameworks (POVCFs), i.e., [Cu0.5(1-ipIM)2]2[V4O11] (POVCF 1), [Cu(1-ipIM)2](VO3)2 (POVCF 2) and [Cu(1-pIM)4](HpIM)4[V10O28] (POVCF 3) (1-ipIM = 1-isopropylimidazole; 1-pIM = 1-propylimidazole) using bifunctional imidazole molecules as organic ligands and base has been developed. Systematic studies revealed that the variable base enviroment in the reaction is the key step in the preparation of 1D to 3D supermolecular networks of POVCFs 1–3. Single crystal X-ray diffraction analyses demonstrated that the Cu2+ atoms of POVCFs 1–2 were coordinated with four imidazole derivative molecules and two different polyoxovanadate {[V4O11]2− and [V10O28]6−} clusters, respectively, exhibiting a [CuN4O2] binding set and a distorted octahedral geometry. Specifically, POVCF 1 exhibited adjacent [V4O11]2− that dangle up and down arranged in a parallel 2D network and further coordinated with [Cu(1-ipIM)4]2+ to form a 3D supramolecular structure. However, POVCF 3 presented one tetrahedral coordinated vanadium atom and one four-coordinated copper atom and they further gave rise to a 1D network by the Cu–O and V–O bonds. More importantly, these POVCFs were further studied in the construction of C–N bond reactions of primary amines under mild conditions, and it was found that POVCF 1 displayed efficient heterogeneous catalytic activities in the Chan–Lam reaction (yields up to 89%).
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
ELECTROCHIMICA ACTA
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2015
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IF 4.504
Yangliao Hu,Xiangheng Niu,Hongli Zhao,Jie Tang,Minbo Lan
With respect to a nonenzymatic electrochemical sensor for detection of small biomolecules like glucose, it is well recognized that an interface with highly electrocatalytic properties is desired. Our previous studies have demonstrated that porous Cu foams from hydrogen evolution assisted electrodeposition could provide beneficial structures for large active surface and mass transfer in glucose sensing ( Biosens. Bioelectron. , 2014, 51: 22-28), and decoration of micro-scale Pt cubes on this multiaperture substrate through manipulative deposition offered exciting activity and stability for electro-catalyzing glucose in neutral media ( Chem. Eur. J. , 2013, 19: 9534-9541). On the basis of these results here we further cover the porous Cu frameworks with a Pt monolayer through the galvanic replacement reaction, and fabricate a new electrochemical interface for high-performance determination of glucose. The sensing surface was facilely assembled by firstly electrodepositing porous Cu architectures with hydrogen evolution and then galvanically replacing the surface layer with Pt, and was well characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and energy dispersive spectroscopy. It was found that the unilaminar Pt-replaced Cu frameworks, with the profitable reaction surface derived from porous skeletons and the underlying activity of Pt-support composites, could supply the highly electrocatalytic oxidation of glucose in phosphate buffer solution (pH 7.4). As a result, the prepared enzymeless sensor provided linear amperometric responses for glucose in the concentration scope of 1∼11 mM, with a high sensitivity of 9.62 μA cm −2 mM −1 .
研究领域:
生物传感
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2017
·
IF 4.798
Lei Hou,Hang Zhao,Siyi Bi,Yumeng Xu,Yinxiang Lu
A simple and cost-effective sandpaper-supported copper framework (SSCF) was innovatively constructed by a novel “scribing-seeding-plating” approach and its application to non-enzymatic glucose determination was systematically investigated. The morphology, composition , crystalline structure of copper nanocoatings and sandpaper substrate were detailedly characterized with SEM, XPS, EDX and XRD, respectively. Processing parameters were optimized by central composite design to obtain an optimal conductivity of 4.69 × 10 7 S·m −1 for copper nanocoatings. The SSCF exhibits excellent performance, with a wide linear range from 1.0 μM to 4.6 mM, a high sensitivity of 2165.5 μA mM −1 cm −2 , a low determination limit of 30 nM (S/N = 3), favorable selectivity and stability. The good electrocatalytic capacity could be attributed to the coordination between high-aspect-ratio porous microstructures of large surface area and copper nanocoatings of excellent catalytic ability. Finally, low relative standard deviations (1.59%–2.76%, n = 10) and good recoveries (101.13%–102.69%) for enzymeless glucose determination in human serum samples and commercial drinks strongly validated satisfactory serviceability of SSCFs in medical diagnostics and food manufacturing.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zijun Ding,Xiaoying Gao,Yanmei Yang,Hua Wei,Shenghong Yang,Jian Liu
Metal-organic frameworks with hierarchical porosities and exposed active sites are promising for ideal enzyme mimics. In this work, we developed a simple and feasible air oxidation strategy to prepare amorphous Cu(II)-cyanoimidazole frameworks (aCu(II)-CIFs) using CuI as the metal source in dimethylsulfoxide. Benefiting from coordination unsaturation and hierarchical porosities, aCu(II)-CIFs exhibit inherent peroxidase-mimic activity for rapid colorimetric reaction of 3,3′,5,5′-tetramethylbenzidine (TMB). aCu(II)-CIFs were utilized to develop a colorimetric platform for specific H 2 S assay in the range of 0.6–30 μM, achieving a limit of detection (LOD) of 0.071 μM. Structural collapse of aCu(II)-CIFs and subsequent generation of stable CuS particles, along with reducibility of H 2 S, are likely responsible for suppressing TMB ox conversion. The proposed method successfully detected H 2 S in real water samples, with a relative standard deviation (RSD) lower than 8.4%. This contribution is expected to offer unique insights into the amorphization mechanisms of MOFs and their potential applications.
研究领域:
化学
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生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Qian Ren,Xiaojing Zhang,Yangyi Sheng,Nuo Yu,Maoquan Li,Zhigang Chen
Mild-temperature photothermal therapy (mPTT) has shown some advantages over traditional photothermal therapy, such as reducing the damage to surrounding healthy tissues and minimizing side effects. Nevertheless, cancer cells can easily repair damage caused by mild hyperthermia due to heat shock proteins (HSPs). Thus, it is imperative to maximize the mPTT efficiency by down-regulating HSPs overexpression and combining other cancer treatments. Herein, we report the synthesis of phytic acid (PA)-Cu 2+ framework/copper sulfide (Cu 2-x S) nanocomposites (abbreviated as PA-Cu/Cu 2-x S NPs) as the novel therapeutic platform that can down-regulate HSPs overexpression for enhanced multimodal mPTT/chemodynamic therapy (CDT)/chemotherapy. PA-Cu/Cu 2-x S NPs were prepared through self-assembly and in-situ vulcanization strategy, resulting in irregular-shaped particles with an approximate size of 100 nm. PA-Cu/Cu 2-x S NPs display a plasmon effect from Cu 2-x S, which enhances near-infrared (NIR) absorption and possesses excellent photothermal conversion efficiency (41.7%). Moreover, PA-Cu/Cu 2-x S NPs exhibit Fenton-like reaction activity resulting from the Cu ions for CDT, and the reaction activity can be further improved 1.3 times due to mild hyperthermia during mPTT. Furthermore, the generated hydroxyl radical (•OH) can effectively decrease HSPs level to enhance mPTT. PA-Cu/Cu 2-x S NPs can also serve as a drug delivery system, and they are capable of loading doxorubicin (DOX) with a loading ability (20.7%). Combining mPTT/CDT/chemotherapy exhibits significant inhibition of tumor growth. This approach can serve as a basis for designing more exquisite platforms that combine mPTT with other therapies to achieve more effective cancer treatment.
研究领域:
肿瘤学
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纳米医学
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生物材料科学
✓ 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）