Journal of Energy Storage
·
2026
·
IF 9.8
Yupeng Li,Gengwei Li,Xiping Lei,Ting Yu
NiSe₂ is considered a promising electrode material due to its high theoretical specific capacity and favorable redox activity; however, its practical application is limited by poor electrical conductivity and structural instability during cycling. To overcome these limitations, a sacrificial template method was employed using Ni@C/MoS₂ as the precursor to successfully construct a series of NiSe₂@C/MoS₂ composites with varying selenization degrees. The resulting hierarchical structure exhibits excellent stability and efficiency: the carbon framework significantly enhances electron transport, while MoS₂ not only contributes additional pseudocapacitance but also synergistically improves ion diffusion efficiency. Furthermore, selenium doping effectively modulates the electronic structure and active sites, leading to optimized electrochemical performance. Systematic investigations reveal that when 2 mmol of selenium source is added, the obtained NiSe 2 @C/MoS₂-2 (denoted as NSC/MoS₂-2) electrode achieves an exceptional specific capacitance of 562.3C g −1 (1405.8 F g −1 ) at 1 A g −1 and maintains 82.7 % capacitance retention at 10 A g −1 . An asymmetric supercapacitor assembled with NSC/MoS₂-2 as the positive electrode and activated carbon as the negative electrode delivers a high energy density of 36.37 Wh/kg at a power density of 700 W/kg. This work innovatively demonstrates that precise control of the selenization degree enables the controllable growth of hierarchical NiSe₂ nanoflowers on an MOF-derived carbon framework while establishing strongly coupled heterogeneous interfaces with layered MoS₂. This integrated design markedly improves the structural stability and electrical conductivity of NiSe₂, while fully harnessing the multiple synergistic effects among NiSe₂, MoS₂, and the carbon matrix, thereby delivering comprehensive breakthroughs in specific capacity, superior rate capability, and long-term cycling stability. The strategy offers a new paradigm for the rational construction of high-performance transition metal selenide-based supercapacitor electrodes.
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 10.5
Han Pan,Murilege Chao,Miao He,Jinhua Chen,Feifan Yin,Yongliang Cai,Wenting Cheng,Zhongyun Wang,Yang Xiang
A single-base mutation in the CHCHD10 gene can impair thermogenic responses, and inhibit the efficient conversion of white adipose tissue to beige adipose tissue. However, achieving high-fidelity detection of such low-abundance single nucleotide polymorphisms (SNPs) within complex biological matrices remains a critical technological challenge. This study developed a novel method for detecting a single-base mutation in CHCHD1 0 by integrating the specific recognition of flap endonuclease 1 (FEN1) with the cascade amplification of an entropy-driven circuit reaction (EDCR), supplemented with magnetic separation to suppress background interference. In this process, the mutant target (MT) hybridizes with the upstream probe (UP) and a hairpin downstream probe (DP) to form a specific three-base overlapping structure. FEN1 recognizes and cleaves this structure, releasing a cleavage sequence (CS). Following magnetic purification, the CS activates the EDCR, enabling dual-signal amplification. The hairpin DP design effectively conceals the CS, significantly reducing background noise. The method achieves a detection limit of 0.23 pM, discriminates mutation abundances as low as 0.01% in mixed DNA samples, and demonstrates robust performance in complex matrices such as human serum and high-background genomic DNA. This work provides an innovative and reliable methodological tool for the detection of low-abundance point mutations in complex samples.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Chenyang Hou,Xifei Li,Weihua Zhang,Ruixian Duan,Mengyang Li,Guiqiang Cao,Zhengxi Hou,Zongnan Lv,Yiming Qi,Yitong Yuan,Guohua Liu,Jingjing Wang,Yukun Xi,Xuexia Song,Wenbin Li,Jiujun Zhang
Single-component transition metal selenide (TMSe) hosts still struggle to balance the adsorption of lithium polysulfides (LPSs) and their catalytic conversion. Herein, a heterostructure host (MoSe 2 -CoSe@C) with an intra-spherical interwoven architecture was synthesized via impregnation-chemical vapor deposition. Benefiting from the synergy of adsorptive MoSe 2 and conductive CoSe, the heterointerface induces electron transfer from CoSe to MoSe 2 , upshifting the d-band center to enhance LPSs adsorption. Compared with their single-component hosts, the MoSe 2 -CoSe@C notably reduces the energy barriers of sulfur redox reactions, decreasing those for Li 2 S oxidation by 31.45 kJ mol −1 and for Li 2 S 4 reduction by 191.67 kJ mol −1 . Additionally, Co acts not only as a core component of the heterostructure but also induces the conversion of carbon-based materials into carbon nanotubes at high temperatures, thus forming a unique interwoven network. This network not only ensures efficient electron transport and inhibits the agglomeration of active components, but also increases the contact area between the host and active sulfur, thereby enhancing the number of effective catalytic sites. Consequently, the MoSe 2 -CoSe@C/S cathode achieves a discharge specific capacity of 582.1 mAh g −1 at a current density of 5C, with only 0.07% capacity decay per cycle over 200 cycles at 4C. This work provides a strategy to construct high-performance adsorption-catalytic hosts for lithium‑sulfur batteries (LSBs).
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lingfeng Li,Yandi Wen,Guokang Han,Yuxin Liu,Yajie Song,Wei Zhang,Jia Sun,Lei Du,Fanpeng Kong,Yulin Ma,Yunzhi Gao,Jiajun Wang,Chunyu Du,Geping Yin
Developing advanced non-precious metal catalysts towards acidic oxygen reduction reaction (ORR) is critical for electrochemical energy conversion devices. Fe-N-C catalysts are demonstrated to be the most promising alternatives to platinum-based catalysts for ORR. Herein, Fe single atoms (SAs) coordinated by pyridinic nitrogen catalysts (denoted as Fe-pyridinic N-C) are synthesized through pyrolysis of ZIF-8 encapsulating ferrocene. Owing to the synergistic effects between Fe SAs and pyridinic N, Fe-pyridinic N-C exhibits remarkable ORR activity and outstanding stability in acid media, evidenced by golden kinetic current density of 9.71 mA cm −2 at 0.8 V, along with only 21 mV decrease in half-wave potential after 20,000 cycles. Theoretical calculations demonstrate that pyridine-type N possesses stronger binding energy with Fe SAs compared with pyrrole-type N, in other words, high pyridinic N content will help stabilize the catalyst. This study will be of great significance for the development of non-noble metal catalysts towards ORR with enhanced stability in acidic media.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Yingying Jiang,Yue Wang,Xinghai Li,Jian Zhang,Kangyi Chen,Jianquan Liang,Li Zhao,Changsong Dai
Na 3 Mn 1−x Cr x Ti(PO 4 ) 3 /C composites with different chromium doping contents (x = 0.01, 0.03, 0.05, 0.07, 0.10, 0.12, 0.15), a potential cathode material in sodium-ion batteries with its classical 3D NASCION structure, has been synthesized via a feasible sol-gel route. The doping effects on the crystal structure were verified by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman and Fourier-infrared spectra (FT-IR). The results show that chromium doping does not alter the structure of the material, and chromium is successfully doped for manganese site. Proper chromium doped Na 3 Mn 1−x Cr x Ti(PO 4 ) 3 /C composites exhibit a high reversible capacity and structural stability . Among them, Na 3 Mn 0.93 Cr 0.07 Ti(PO 4 ) 3 /C and Na 3 Mn 0.90 Cr 0.10 Ti(PO 4 ) 3 /C achieve the highest capacity retention (90.19% after 100 cycles at 0.2 C) and initial discharge specific capacity (119.65 mA h g -1 at 0.2 C), yielding the coulombic efficiency of ~100%. Interestingly, even after cycling at 10 C over 500 cycles, the Na + -storage capacity of 94.37 and 101.51 mA h g -1 with a capacity retention of 79.70% and 73.74% were respectively still obtained with x = 0.07 and 0.10, highlighting their excellent long cycling life and remarkable rate performances. Results from the cyclic voltammetry and impedance spectroscopy studies were combined to verify the enhanced sodium-ion diffusion coefficients .
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
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IF 4.784
Xiaoxiao Sun,Jiafeng Shen,Di Yu,Xiao-kun Ouyang
In this study, we prepared pH- and magnetism-responsive Fe 3 O 4 @C/carboxymethyl cellulose (CMC)/chitosan composite microbeads for controlled release of diclofenac sodium (DS) to (i) prevent complete drug release in gastric area, (ii) maintain blood drug concentration in a specific part of the body, (iii) reduce drug administration time and systemic drug toxicity , and (iv) improve drug efficacy. Through one-step solvent thermal treatment, a polyethylene glycol layer was wrapped into Fe 3 O 4 nanoparticles . Then, Fe 3 O 4 @C nanoparticles were incorporated into CMC matrix and coated with chitosan layer via a self-assembly technique to form core–shell polyelectrolyte complexes (PECs). The composite beads were characterized by SEM, TEM , FT-IR spectrometry , and TGA . In addition, the effect of different concentrations of Fe 3 O 4 @C, CMC, aluminum chloride (AlCl 3 ), and chitosan on the swelling process of composite beads, DS loading, and controlled release behavior was systematically studied. DS encapsulation efficiency in Fe 3 O 4 @C/CMC/chitosan beads reached 70.8 ± 0.65% at concentrations of 0.1% Fe 3 O 4 @C, 3% CMC, 3% AlCl 3, and 1% chitosan. The beads showed a higher swelling index in phosphate buffer at pH 7.4 and 6.8 than at pH 1.2. The composite beads revealed excellent pH-sensitive in vitro drug release profiles and prevented burst release in the gastrointestinal tract.
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高影响因子
MRS Communications
·
2022
·Vol. 12
·期 5
·937-943
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IF 2.935
Shan Xinyuan,Li Xiaohua,Feng Hao,Ma Mengxiang,Cao Peng-Fei,Yang Dandan,Yang Huabin
With high capacity and low redox potential, Sn-based materials represent promising anodes for sodium-ion batteries (SIBs). However, the large volume expansion during the cycling process limits their application. Herein, we report a cost-effective, simple, and non-toxic SbSn/SP@C electrode for SIBs via ball milling process and sucrose reduction method. The SbSn/SP@C electrode exhibits high cycle stability and good reversible capacity for SIBs (400.3 mAh g −1 after 100 cycles). Consequently, SbSn/SP@C electrode can afford an effectively carbon-based conductive system, which buffers large volume change of SnSb alloy during the cycling process and provides promising electrochemical performance in Na storage. Graphical abstract
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高影响因子
Small
·
2018
·Vol. 14
·期 17
·1703818
·
IF 9.598
Zhi Chen,Dangui Yin,Ming Zhang
Sandwich-like MoS 2 @SnO 2 @C nanosheets are prepared by facile hydrothermal reactions. SnO 2 nanosheets can attach to exfoliated MoS 2 nanosheets to prevent restacking of adjacent MoS 2 nanosheets, and carbon transformed from polyvinylpyrrolidone is coated on MoS 2 @SnO 2 , forming a sandwich structure to maintain cycling stability. As an anode for sodium-ion batteries, the electrode greatly deliverers a high initial discharge specific capacity of 530 mA h g −1 and maintains at 396 mA h g −1 after 150 cycles at 0.1 A g −1 . Even at a large current density of 1 A g −1 , it can hold 230 mA h g −1 after 450 cycles. Besides, as an anode for K + storage, the electrode also shows a discharge capacity of 312 mA h g −1 after 25 cycles at 0.05 A g −1 . This work may provide a new strategy to prepare other composites which can be applied to new kind of rechargeable batteries.
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高影响因子
Molecular Catalysis
·
2018
·
IF 0
Liangliang Zhang,Xiao Chen,Zhijian Peng,Changhai Liang
Chemoselective hydrogenation of C C and C O bonds in the cinnamaldehyde (CMA), was successfully performed with highly dispersed transition metal silicides-embedded in the porous carbon matrix (M 2 Si@C (M = Fe, Co, Ni)) nanocatalysts with a particle size of 8–12 nm, which were synthesized by a facile approach via microwave-assisted chemical vapor deposition (MWCVD) using organosilane and metal-organic-framework (MOFs-74)-templated porous carbon matrix-encapsulated transition metal (M@C) precursors. Compared with M@C, the activity of M 2 Si@C (M = Fe, Co, Ni) nanocatalysts obviously increases, which can be attributed that the overlayered carbon on metals has been destroyed during MWCVD processing, leading to the exposure of more active sites of catalysts. Due to the inherent electronic properties of metallic active sites in the metal silicides, the catalytic activity of Ni 2 Si@C was much higher than that of Co 2 Si@C and Fe 2 Si@C in the chemoselective hydrogenation of CMA. At total conversion of CMA, the Co 2 Si@C nanocatalyst was chemoselective for the hydrogenation of polar C O bonds (selectivity to cinnamyl alcohol of ∼60%), whereas Ni 2 Si@C nanocatalyst was highly chemoselective for the hydrogenation of non-polar C C bonds (selectivity to hydrocinnamaldehyde of ∼90%). The doping of silicon atoms with more electropositive into metals lattices in the M-Si intermetallic compounds (IMCs) influenced the adsorption of substrate molecule on the catalyst surface, slightly leading to the different reaction routes. In addition, the Co 2 Si@C and Ni 2 Si@C respectively maintain the robust stability in the hydrogenation of CMA. This result provided guidance on the design of catalyst via tuning the polarization properties of the inter-atoms in the IMCs according to the target product.
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DOI
CARBON
·
2020
·
IF 8.821
Lei Lei,Zhengjun Yao,Jintang Zhou,Wenjian Zheng,Bo Wei,Jiaqi Zu,Keyu Yan
The hydrangea-like Ni/NiO/C composites have been successfully synthesized by in-situ pyrolysis stemmed from Ni-MOFs. The composition and structure can be adjusted by controlling the pyrolysis temperature, and it leads to the graphitization degree and electromagnetic parameters. A broad effective absorption bandwidth of the composite up to 5.67 GHz with the maximum reflection loss of −47.72 dB in 1.9 mm thickness. The results demonstrate hydrangea-like Ni/NiO/C composites have superior microwave absorption resulted from the synergistic effect between the unique structure, dielectric loss, and magnetic loss. Therefore, this work confirmed that hydrangea-like structure composite can be an ideal candidate for highly efficient microwave absorption materials with a facile preparation process and flexible control of electromagnetic parameters.
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高影响因子
MATERIALS LETTERS
·
2015
·
IF 2.489
Ting Wang,Fanghui Wang,Hong Zhu
Hollow core–shell-structured SiO@void@C composites were synthesized by chemical vapor deposition with acetylene gas , and they could be applied as anode materials for lithium ion (Li-ion) batteries. In addition, this structure was designed to accommodate the volume expansion during lithiation for high-performance Li-ion battery anodes. The structures and morphologies of the synthesized composites were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), from which an egg-like structure was observed due to the deposition of carbon layers on the SiO surface. A void space between the particles and the shell was formed as well. The electrochemical tests of the as-prepared samples indicated that high capacity (1780 mAh/g at first cycle) and high Coulombic efficiency (50 cycles with 99.84%) were achieved in this core–shell structured SiO electrode. Therefore, the core–shell SiO/C nanocomposite exhibits better electrochemical performance than pure SiO nanoparticles , indicating that it is a promising material to improve the cyclability and kinetics of nano-anode materials for Li-ion batteries.
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高影响因子
MATERIALS LETTERS
·
2013
·
IF 2.224
Xiaolei Jiang,Huayun Xu,Jing Liu,Yitai Qian
The Li 2 MnSiO 4 /C nanocomposite is successfully synthesized by hydrothermal reaction at 150 °C for 48 h and then annealed at 650 °C in the presence of citric acid. Interestingly, the hydrothermal synthesized Li 2 MnSiO 4 shows a shuttle-like shape, which is composed of primary particles with average size of 50–100 nm. After carbon coating, these nanoparticles are separated from the secondary particles, and the thickness of carbon layer is about 2–4 nm. The Li 2 MnSiO 4 /C nanocomposite delivers an improved high electronic conductivity and an enhanced electrochemical behavior.
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高影响因子
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