ANALYTICAL CHEMISTRY
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2018
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IF 6.042
Zhichao Liu,Shengnan Wang,Wanying Li,Yang Tian
Iron ions, as a main component of intracellular labile iron, not only play an important function in oxygen transport, enzymatic reactions, and electron transport but also are vitally important in oxidative stress. In this work, we developed a ratiometric fluorescent biosensor for ferrous ion (Fe2+), in which gold nanoclusters (AuNCs) were synthesized as a stable fluorescent probe and a ligand (FeL) was designed for specific recognition of Fe2+ and conjugated onto AuNCs (AuNC@FeL). Meanwhile, water-soluble sulfocyanine 7 N-hydroxysuccinimide ester (Cy7 NHS ester) was immobilized onto AuNC@FeL as a reference element. The developed ratiometric fluorescent nansosensor displayed good linearity with the concentration of Fe2+ in the range of 1–105 μM, and detection limit was achieved down to 210 nM. In addition, this nanosensor responded to Fe2+ in less than 1.23 s and showed high selectivity against other metal ions, amino acids, and reactive oxygen species. With the advantages of high selectivity and accuracy, as well as quick response and long-term stability, this organic–inorganic ratiometric fluorescent probe was successfully applied in real-time biosensing and bioimaging of Fe2+ in neurons and HepG2 cells. By use of this tool, it was found that the increasing concentration of Fe2+ in live cells was closely related to oxidative stress.
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Small Methods
·
2025
·
IF 9.1
Fengning Liu,Hao An,Qing He,Xuesong Li,Feng Ding
The synthesis of multilayer van der Waals (vdW) film materials has attracted considerable interest in both fundamental and applied research. Recently, methods for synthesizing multilayer graphene films or graphite on single-crystal nickel foils are developed. However, the chemical vapor deposition (CVD) synthesis of thick-layer graphene films or graphite (TLG) on copper substrates remains a significant challenge due to the self-limiting growth phenomenon. In this study, a novel method to grow TLG on copper substrates by controlling the silicon additive is presented. The as-grown TLG exhibits high quality, with controllable thickness from a few layers to tens of nanometers. The growth of TLG films is achieved by the synchronous growth of multilayer graphene islands on a silicide copper surface, which is likely to be in a liquid state according to the Cu-Si phase diagram. On the Cu-Si surface, all graphene layers grow synchronously, circumventing the self-limiting mechanism and the antiwedding cake growth or wedding cake mode of van der Waals material growth. Based on this synchronous growth mode, the thickness of TLG can be precisely controlled, ranging from a few to tens of nanometers. The study provides a facile and scalable way to synthesize high-quality thick vdW films for various applications.
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CRYSTENGCOMM
·
2024
·
IF 2.6
Guangrui Han,Lang Liu,Minyu Jia,Xuting Li,Linrui Hou,Changzhou Yuan
Recently, silicon has been considered one of the preferred materials for the anodes of next-generation high-energy-density Li-ion batteries due to its advantages of high specific capacity, low working voltage, and abundant reserves. However, the huge volume change and poor electrical conductivity of silicon anodes during the lithiation and de-lithiation process seriously affect their practical application. Herein, honeycomb porous silicon is synthesized by a modified Stöber method and magnesium thermal reduction, which avoids using toxic gases (such as silane) in the traditional preparation of commercial nano-silicon. Moreover, the honeycomb porous structure can effectively alleviate the volume expansion during the charge/discharge process and agglomeration behavior of nano-silicon. Therefore, thanks to its unique structural merits, the honeycomb porous silicon anode is endowed with a reversible specific capacity of 824.1 mA h g−1 after 100 cycles at 0.5 A g−1 and 679.2 mA h g−1 even at an ultrahigh current density of 1.0 A g−1 after an extended cycling period of 200 cycles, which is almost twice that of commercial nano-silicon. More importantly, this finding offers promising advancements in designing silicon anodes in energy storage.
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Journal of Materials Chemistry A
·
2024
·
IF 10.7
Mengyi Li,Baokai Wang,Chang Yu,Mengyang Niu,Kunjie Yuan,Weiwei Xuan,Ming Yue,Lifeng Zhu,Kexin Chen,Qi Wang
With great advancements in foldable electronic devices, there has been growing interest in ultra-light and flexible composite films possessing high in-plane thermal conductivity. One-dimensional (1D) Si3N4 nanowires (Si3N4NWs) possess the advantages of high thermal conductivity, superior mechanical performance and easy to be directionally aligned to construct thermally conductive pathways, which have been considered one of the ideal fillers for preparing anisotropic composite films. However, 1D Si3N4NWs with high aspect ratios tend to aggregate and are difficult to be dispersed in polymer matrixes, while traditional dispersion approaches utilizing prolonged ball milling or strong mechanical mixing easily result in a significant reduction in the length of Si3N4NWs, making it difficult to fully exploit the advantages of high intrinsic thermal conductivity. Therefore, it is highly essential to prepare high-performance composite films without damaging the length of Si3N4NWs. In this study, we propose an innovative strategy for the direct construction of continuous thermally conductive networks composed of ultra-long Si3N4NWs. An entire piece of Si3N4NW paper was successfully synthesized, which was directly used to prepare composite films via a simple vacuum-impregnation combined with hot-pressing method. Since the high aspect ratio of Si3N4NWs was maximally preserved during the composite process, the prepared Si3N4NW/EP composite films exhibited a high in-plane thermal conductivity of 16.02 W m−1 K−1 at a filling fraction of 64.6 wt%. More importantly, the interconnected, ultra-long Si3N4NWs also provide composite films with flexibility and excellent mechanical strength, enabling promising applications in the thermal management of electronic devices.
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Journal of Materials Chemistry A
·
2024
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IF 10.7
Li Zhao,Li Yang,Yu Cheng,Hong Zhang,Lulu Du,Wei Peng,Ahmed Eissa Abdelmaoula,Lin Xu
Lithium metal is considered as one of the most promising anode material candidates for high-energy-density batteries. However, the solid electrolyte interface (SEI) of the lithium metal surface is susceptible to corrosion by hydrofluoric acid (HF) and H2O, which hinders the practical application of lithium metal. In this work, a functional composite polymer electrolyte (FCPE) containing Si nanoparticles can scavenge HF and H2O to protect the SEI from corrosion. The Si nanoparticles in the FCPE react with HF to form SiF4, which reacts with H2O to produce LiF and LixSiOy without generating other harmful by-products. The LiF and LixSiOy are ionic conductors, which are deposited on the surface of lithium metal constructing an SEI layer with high ionic conductivity. The high ionic conductivity of the SEI can contribute to the induction of uniform Li-ion plating/stripping behavior, thereby preventing the growth of lithium dendrites. As a result, a Li‖Li symmetric cell with the FCPE under extreme conditions with a water content of 8078 ppm (VH2O:Vbase electrolyte = 1.0%) can cycle stably for 800 h. These results highlight that the FCPE can remove water impurities to maintain the excellent performance of lithium metal batteries and provide a direction for the development of polymer electrolytes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yanlin Zhang,Junhong Lu,Weizuo Li,Jie Huang,Haoyang Jiang,Ben Liang,Benyuan Wang,Dafang He,Haiqun Chen
Macro-assembled silicon-based films can be taken into account as a possible anode material for the lithium ion batteries (LIBs) in portable electronics. However, most previously proposed preparation strategies are labor-intensive, intricate, and not appropriate for large-scale manufacturing. Herein, a multifunctional flexible silicon/carbon nanotube/reduced graphene oxide (Si/CNT/rGO) film was fabricated by one-step coating method based on the lyotropic nematic liquid crystals of graphene oxide (GO). The composite film’s structure is made up of stacked rGO nanosheets, with nano-Si and CNT interspersed between the layers, resembling a “brick–mortar” pillared configuration. The prepared Si/CNT/rGO film demonstrates an exceptional tensile strength, reaching up to 134 MPa, and manifests commendable lithium storing properties in terms of initial charge capacity (1885 mAh/g at 200 mA/g) and cyclability (1376.4 mAh/g beyond 200 cycles). The straightforward preparation method offers a fresh path to create stable and mechanically robust composite film for advanced engineering applications.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2012
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IF 2.237
Xiao Chen,Miao Li,Jingchao Guan,Xinkui Wang,Christopher T. Williams,Changhai Liang
Nickel–silicon intermetallics have been prepared by a direct silicification method using SiH4 as the silicon source. The prepared nickel–silicon intermetallics were characterized by X-ray diffraction, transmission electron microscopy, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and CO chemisorption measurements. The catalytic hydrogenation of cinnamaldehyde and phenylacetylene over the nickel–silicon intermetallics was investigated. Nickel–silicon intermetallics presented much higher selectivity to the intermediate product (hydrocinnamaldehyde) than monometallic nickel catalyst, which may be attributed to the repulsive force between the electronegative silicon atoms in the nickel–silicon intermetallics and oxygen atoms in the C═O bond of cinnamaldehyde. In addition, nickel–silicon intermetallics showed excellent selectivity for the hydrogenation of phenylacetylene to styrene (ca. 93%) due to the strong modification of the electronic structure derived from the interaction of nickel and silicon.
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ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Wenhao Fan,Shaoping Chen,Bo Zeng,Qiang Zhang,Qingsen Meng,Wenxian Wang,Zuhair A. Munir
Solid solutions of Mg2Si0.6Sn0.4–xBix with 0 ≤ x ≤ 0.03 were prepared by a one-step synthesis and consolidation method, using MgH2 as a starting material. The thermoelectric properties of these samples were evaluated over the temperature range 300–775 K. Figure of merit, zT, values were determined over this range for all compositions and found to increase with temperature reaching a value of 1.36 at 775 K for samples with x = 0.02. Examination of the components of the total thermal conductivity showed that the bipolar thermal conductivity is suppressed by an increase in the band gap, resulting from solid solution formation, and by low minority carrier mobility. The suppression of the bipolar thermal conductivity is believed to be the consequence of charged grain boundaries.
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Journal of Energy Chemistry
·
2025
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IF 14.9
Kanghou Ma,Caiyue Sun,Yitao He,Xinyue Zhao,Sunfa Wang,Ge Zhang,Chen Wang,Fangshuo Zhou,Zhiguo Liu,Zhe Lü,Xiqiang Huang,Ningning Wu,Yaohui Zhang
This study presents a novel approach to enhance silicon anode performance through barium titanate (BTO) incorporation, with the establishment of a force-electric coupling model. By introducing piezoelectric BTO into silicon matrices, we successfully improved both the mechanical stability and electrochemical kinetics of the anode. The developed force-electric coupling model explains how BTO mitigates stress accumulation during lithiation while optimizing the kinetics of Li + and electron transfer. Experimental verification and multiphysical simulation indicate that Si@BTO effectively eliminates structural degradation during the cycling process and significantly reduces the charge transfer resistance. The force-electric coupling mechanism further facilitates stable solid electrolyte interphase (SEI) formation. When paired with LiFePO 4 cathodes, Si@BTO maintains 76% capacity retention after 500 cycles at a 10 C rate. This work establishes a basic force-electric coupling model framework and offers insights into the development of advanced silicon anode batteries with exceptional performance.
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Small
·
2025
·
IF 12.1
Cheng Li,Yuqi Wu,Fucheng Ren,Jun Liu,Ying Lin,Meng Xia,Huanran Wang,Chunyan Meng,Zhenyu Wang,Zhengliang Gong,Yong Yang
Silicon is widely recognized as a promising anode material for all-solid-state batteries (ASSBs) due to exceptional specific capacity, abundant availability, and environmental sustainability. However, the considerable volume expansion and particle fragmentation of Si during cycling lead to significant performance degradation, limiting its practical application. Herein, the development of a pre-lithiated Si-based composite anode (c-Li 1 Si) is presented, designed to address the key challenges faced by Si-based anodes, namely severe volume changes and low electrochemical stability. The c-Li 1 Si anodes are prepared by incorporating Li₁Si powders with Li 6 PS 5 Cl (LPSCl) sulfide solid electrolyte (SSE), forming a dense structure that enhances conductivity and mitigates structural degradation. The ASSBs with c-Li 1 Si-60 anode exhibit outstanding electrochemical performance, including excellent rate capability and capacity retention of 84.4% after 1000 cycles at 1 C and exceptional performance even at low anode-to-cathode capacity ratios (N/P ratio) of 1.68. EIS and pressure measurements reveal improved reaction kinetics and reduced volume expansion. X-ray micro-CT and SEM further confirmed the introduction of LPSCl effectively alleviated volume changes and maintained electrode structural integrity, contributing to enhanced electrochemical performance. These results underscore the potential of the c-Li 1 Si anode to overcome the intrinsic limitations of Si-based anodes, offering a promising pathway toward high-energy-density ASSBs.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Sinian Jiang,Bin Zhang,Xinyu Liu,Jingchun Cao,JunJie Ge,Kexin Men,Yuxiong Jiang,Xiaocong Wang
As a promising anode for lithium-ion batteries (LIBs), silicon (Si) has been studied due to its high specific capacity. However, significant volume change during charge-discharge process has seriously impeded its practical application. Compounding with carbon is one of the methods to solve this problem. In this paper, biomass carbon is prepared by high temperature carbonization of Chinese rose petals. Different mass ratios of Si nanoparticles are embedded in the biomass carbon to produce C@Si composites. The as-prepared C@Si composites are assembled into LIBs to investigate their electrochemical performance. As an anode material for LIBs, the manufactured C@Si composite material (Si-25 wt%) manifests a stable cycling performance (524 mAh•g −1 at 0.1 A•g −1 after 100 cycles), a long cycle life (581 mAh•g −1 at 1 A•g −1 after 400 cycles) and excellent rate capability. And its initial coulombic efficiency at the current density of 1 A•g −1 (99.62 %) is much larger than that of pure nano-Si (29.45 %). The electrochemical impedance spectroscopy (EIS) results indicate that the C@Si composite materials can behave as an ideal capacitor. This study reveals the possibility of changing flower petals to carbon material and the potential applications in the field of LIBs.
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Coatings
·
2024
·Vol. 14
·期 9
·1210
·
IF 2.9
Songjia Kong,Chenguang Liu,Jiawei Ren,Tianchang Wang,Xianwei Geng,Yudan Yuan,Chun Zhao,Cezhou Zhao,Li Yang
Silicon is a promising anode material for high-performance lithium-ion batteries (LIBs), but its rapid capacity degradation has significantly hindered its large-scale application. In this study, we propose an in situ self-assembly polymerization method to fabricate a stable silicon-based anode by leveraging electrostatic self-assembly technology, in situ esterification, and amidation reactions. The incorporation of a cross-linked polymer, combined with the synergistic effects of electrostatic interactions between negatively charged MXene and positively charged silane-coupling-agent-modified silicon, offers a novel strategy for enhancing the electrochemical performance of LIBs. Notably, annealed electrodes with a 65 wt% nmSi-NH2/MXene ratio demonstrate outstanding electrochemical performance, achieving a capacity of 929.5 mAh g⁻¹ at a current density of 1 A g⁻¹ after 100 charge/discharge cycles. These findings suggest that the integration of cross-linked polymers and electrostatic self-assembly can significantly improve the intercalation and overall electrochemical performance of silicon anodes in lithium-ion batteries.
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