ANALYTICAL CHEMISTRY
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2025
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IF 6.7
Hang Su,Shuo Huang,Jingming Lan,Xin Gao,Hongyan Yue
Chiral recognition and detection of enantiomer molecules are crucial for biochemical sensing and pharmaceutical applications. In this study, a rod-shaped left-handed cellulose nanocrystal (CNC, length of ∼75 nm and diameter of ∼10 nm) is extracted from strobili fibers of plane trees through acid hydrolysis. Then, octahedral CuO/C nanoparticles (∼450 nm) are synthesized via thermal decomposition of the Cu-MOF precursor. Finally, CNC@CuO/C is prepared by the self-assembly of CNC and CuO/C driven by solvent evaporation. The CNC@CuO/C electrode demonstrates a remarkable enantioselectivity to l-cysteine (l-Cys) and achieves a high sensitivity of 3.14 μA·mM–1 and a low detection limit (LOD) of 4.62 μM. The electrode exhibits an excellent anti-interference capability, reproducibility, repeatability (RSD < 5%), and stability (>90% after 15 days). This presents a sustainable approach to use renewable nanomaterials, and it also shows a promising potential for clinical diagnostics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Daoyan Feng,Hui Yang,Xingzhong Guo
3-Dimensional hierarchically porous ZnFe 2 O 4 /C composites with interconnected macropores and co-continuous hollow skeletons are facilely synthesized and used as anode materials for Li-ion batteries. The interconnected macropores impede the agglomeration of primary particles and buffer the volumetric variations, hollow mesoporous skeletons not only improve the interfacial contact area between electrode and electrolyte but also facilitate lithium ions transfer rate. Moreover, N-doped carbon layer further enhances the conductivity and mechanical strength of skeletons, as well as accelerates electron transfer during repeated discharge and charge process. The as-prepared 3-dimensional hierarchically porous ZnFe 2 O 4 /C composites possess excellent Li-ion storage properties, delivering a high reversible capacity of 972 mAh g −1 at 200 mA g −1 after 100 cycles and a decent specific capacity of 711 mAh g −1 even at a large current density of 1000 mA g −1 after 400 cycles. These values are among the highest reported for ZnFe 2 O 4 -based materials with different morphologies and nanostructures. The resultant ZnFe 2 O 4 /C composites display the potential practical application for high-performance Li-ion batteries.
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ADVANCED POWDER TECHNOLOGY
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2020
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IF 4.217
Weiwen Meng,Cong Li,Meng Yao,Zhangxing He,Xianwen Wu,Zhen Jiang,Lei Dai,Ling Wang
Aqueous lithium ion batteries (ALIBs) exhibit great application prospects in energy storage system, and the anode materials is the key to the extensive development of ALIBs. In this study, Li 1+x Ti 2−x Fe x (PO 4 ) 3 /C (x = 0, 0.05, 0.10, 0.30) composites as anode for ALIBs were synthesized via sol-gel method. The effect of Fe doping on LiTi 2 (PO 4 ) 3 /C properties was assessed by electrochemical measurements. In all of these composites, Li 1.1 Ti 1.9 Fe 0.1 (PO 4 ) 3 /C (LCF-10) presents the best electrochemical properties. LCF-10 exhibits discharge capacity with 120.0 and 80.2 mAh g −1 at 0.5 and 15C, severally, increasing by 1.2 and 1.3 times compared with the original LiTi 2 (PO 4 ) 3 /C. Besides, LCF-10 demonstrates remarkable cycling performance, whose discharge capacity retention can keep 70.2% at 5 C for 1000 cycles. Our study demonstrates that Fe doping for LiTi 2 (PO 4 ) 3 lattice can efficiently enhance electrochemical properties of LiTi 2 (PO 4 ) 3 /C composite.
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NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 19
·7962-7967
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IF 3.288
Zichuang Li,Yu Pei,Qiangjian Ju,Beibei Guo,Yifan Hu,Qian Liu,Yufang Zhu,Jiacheng Wang
The preparation of a highly active, cost-effective catalyst is the key to the commercial production of hydrogen through the electrochemical splitting of water, which is an ideal route to a clean energy conversion and storage system in the future. Unfortunately, the current catalysts for HER are rarely able to balance performance and cost. Herein, we successfully prepared an efficient catalyst (Ru/N–C) for HER by a facile method through a multi-step pyrolysis hard template. The electrochemical tests show that the HER activity of the synthesized Ru/N–C-6% catalyst with an onset potential of 0 mV and an overpotential of 34 mV at 10 mA cm−2 was comparable to that of Pt/C in 1 M KOH. Moreover, after 10 000 cycles, the potential change at 10 mA cm−2 is almost negligible. The origin of this high activity was analyzed via density functional theory (DFT), and the mechanism is further understood. Therefore, this work provides a promising substitute for Pt-based catalysts.
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Journal of Central South University
·
2019
·Vol. 26
·期 6
·1443-1448
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IF 0.973
Tang Yi-qun,Liu Xi,Huang Xiao-bing,Ding Xiang,Zhou Shi-biao,Chen Yuan-dao
Li 2 FeSiO 4 is deemed to be a potential candidate for large-scale applications because of its abundance, low cost and high safety, etc. Unfortunately, its low conductivity, resulting in poor rate performance, has become a main obstacle to its applications in power battery and energy storage system. In this work, C-Ag coated Li 2 FeSiO 4 is introduced to improve the innate electronic conductivity and Li-ion diffusion ability. The results demonstrate that Li 2 FeSiO 4 /C/Ag composite exhibits better electrochemical performance. It possesses a specific discharge capacity of 152, 121, 108 mA∙h/g at 0.2 C , 5 C and 10 C , respectively. At the same time, the Li 2 FeSiO 4 /C/Ag composite shows good cycle stability and a capacity retention ratio of 97.9% after 100 cycles at 1 C .
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Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 16
·4030-4040
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IF 7.779
Chunna Zhang,Feng Lin,Lingtao Kong,Zhaoqi Ye,Di Pan,Hongbin Li,He Li,Peng Liu,Yahong Zhang,Hongbin Zhang,Yi Tang
Zeolite nanosheets are a burgeoning class of two-dimensional (2D) nanomaterials due to their fascinating properties and diverse applications. However, the effective and controllable preparation of advanced 2D zeolite materials with hierarchical structure and enhanced properties still needs to be investigated. Here, we report highly dispersed oligolayer MWW nanosheets (ca. 2–4 layers) with c-axis-penetrated mesopores, prepared by H2O2-induced micro-explosion coupled with ethanolamine pre-treatment from the multilayered precursor MCM-22P. The vertically aligned mesopores are well merged with intrinsic microporosity within MWW oligolayers with structural integrity. Meanwhile, the removal of OSDA and surface-grafted ethanolamine can be simultaneously achieved apart from the construction of the hierarchical structure. The porosity can be easily regulated by adjusting the H2O2 content, while the framework structure, composition, and intrinsic acidity are retained. Furthermore, benefiting from the greatly improved accessibility of intralayer 10-MR sinusoidal channels, the c-axis-penetrated mesoporous MWW zeolite nanosheet shows enhanced adsorption/diffusion properties and catalytic performances for bulky substrate conversion. This work provides a synergetic post-treatment method for the more rational and controllable design and application of novel layered hierarchical zeolite catalysts, and the efficient and versatile approach reported here shows great potential for industrial applications.
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Xinyi Hu,Hui Xiong,Jiale Dou,Zhao Jiang
It is critical to create the anodic catalysts with high efficiency and economy for direct methanol fuel cells (DMFCs). Here, a series of PtNi/NbN-C catalysts (M=Co, Sn, Ni) are developed using the glycol solvothermal process, to investigate the catalytic effficiency for alkaline methanol oxidation reaction (MOR). Catalytic performance evaluation experiments show that the doped Ni species bring the enhancement effect on Pt/NbN-C for the alkaline MOR. The mass activities of Pt x Ni y /NbN-C show a volcanic trend with the increased Ni contents. PtNi/NbN-C has the highest mass activity (6025.5 mA·mg -1 Pt ) for alkaline MOR, 18.3 times greater than that of the Pt/C commercial catalyst. The LSV, EIS, Tafel, CA and CO stripping results imply PtNi/NbN-C also exhibits the lowest onset potential, charge transfer resistance, fastest kinetics, highest CO tolerance and stability. When the XRD, HRTEM, and XPS analysis are combined, it is discovered that the electronic effect between the Pt, Ni, and NbN species is mostly responsible for the catalytic performance enhancement is mainly depend on the electronic effect among the Pt, Ni and NbN species. The presence of Pt in an electron-deficient state can enhance the conversion of adsorbed methanol and intermediates, evidenced by a direct relationship between the d -band centers and the mass activities for MOR of different catalysts. This study may provide guidance for the development of anodic materials for DMFCs.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
·
IF 4.6
Yue Han,Xuehui Tang,Xiangyu Wu,Hongyi Shi,Lei Huang,Lei Wei,Mingmin Li,Yue Zhang
l -Cysteine ( l -Cys) is a significant biomarker for various diseases, including liver disease, skin disorders, and Parkinson’s disease, making its detection crucial for diagnostic purposes. In this study, we present a novel colorimetric sensing platform for l -Cys detection. Using ZIF-8 as a precursor, a cobalt-based single-atom catalyst (Co-N-C) was synthesized through pyrolysis, adsorption, and activation processes. The resulting Co-N-C catalyst exhibited remarkable oxidase-like (OXD-like) activity, effectively facilitating the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to form oxTMB, which resulted in a distinct blue color. However, due to its strong reducibility, l -Cys can scavenge reactive oxygen species (ROS) generated by the Co-N-C catalyst, thus inhibiting the oxidation of TMB. By monitoring the color change in the solution, we developed a highly sensitive colorimetric assay for l -Cys detection. The assay demonstrates excellent selectivity and has a detection limit of 0.1 µM, with a linear detection range from 0.1 to 10 µM. This work offers an efficient approach for detecting l -Cys and establishes a new framework for designing high-performance nanozymes.
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EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
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2024
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IF 6
Xufeng Qin,Weifeng Xu,Jiangnan Hu,Yong Dong,Renbo Ding,Shuheng Huang,Zhendong Zhao,Hong Chang,Xiaokun Wang,Shuai Dong
Glioma, a common primary brain tumor, is highly infiltrative and invasive, often leading to drug resistance and recurrence. Therefore, the development of novel therapeutic agents is urgently needed. Pseudellone C is a novel marine triindole alkaloid. Screening of its antiproliferative activity against 55 cell lines revealed its anti-CNS cancer potential. A total of 42 derivatives of Pseudellone C were designed and synthesized, and their inhibitory activities against two human glioma cell lines (U-87MG and LN-229) were evaluated using the CCK-8 assay. Ten derivatives exhibited potent antiproliferative activity with IC 50 values below 10 μmol, which are 18- to 39- fold more potent than Pseudellone C. Among these, derivative 4o demonstrated favorable blood-brain barrier permeability. Mechanistic studies revealed that 4o induces apoptosis primarily by activating the downstream caspase 3 cascade via the TNF/TNFR pathway. Structure-activity relationship correlations were systematically analyzed, and a pharmacophore model for further rational design was constructed.
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Journal of Energy Storage
·
2024
·
IF 8.9
Zheng Bo,Meiqi Zhou,Yibo Deng,Jianhua Yan,Kefa Cen,Yanguang Zhou,Huachao Yang
Water-in-salt and organic solvent-additive strategies have significantly improved the electrochemical stability window of aqueous electrolyte , while it still faces poor low-temperature thermodynamics stability and unsatisfied transport kinetics, as well as flammability risks caused by organic solvent . Herein we report a novel “cation-water-urea ternary interaction strategy” via environmental-friendly and non-flammable urea (CO(NH 2 ) 2 ) to solve the above dilemma. The cation-water-urea ternary interaction strategy preferentially develops CO(NH 2 ) 2 -cation solvation structures for weakened cation-anion associations, improved anti-salt-precipitation capability, and thus enhanced ionic conductivity , meanwhile it improves the low-temperature thermodynamics stability via the stronger CO(NH 2 ) 2 -water hydrogen-bond interactions to suppress the freezing and electrolysis of water. The optimum ternary aqueous electrolyte exhibits an ultralow freezing point (−70 °C), wide electrochemical stability window (2.9 V) and outstanding ionic conductivity (135 mS cm −1 @25 °C and 5.3 mS cm −1 @−50 °C), demonstrating superior performance compared to traditional organic solvent-additive and water-in-salt electrolytes. Finally, to demonstrate its potential for practical applications, ternary aqueous electrolyte-based supercapacitors are fabricated using commercial activated carbon electrodes, which exhibit outstanding capacitance retention (71.4 %) and much lower ion transport resistance even at ultralow temperature of −40 °C. This work proposes a novel ternary aqueous electrolyte with improved thermodynamics stability and kinetics for safe, low-temperature energy storage applications.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jing Xu,Kangle Wan,Jianjie Wu,Yunchao Wu,Wei Yan,Lichuan Zhang,Yuanping Chen,Yingcong Wei
During the piezoelectric photocatalytic process, the surface curvature of the piezoelectric photocatalyst undergoes dynamic changes under the influence of external mechanical forces. However, the correlation between the surface curvature and catalytic performance remains largely unexplored. Here, we demonstrate that decreasing the radius of curvature of MoSe2 significantly enhances its piezoelectric-photocatalytic activity for C–N coupling reactions, enabling imine synthesis from benzylamine. Comprehensive characterization and DFT calculations together show that the piezoelectric effect in the curved MoSe2 structure inhibits photogenerated charge carriers from recombination, improving carrier utilization efficiency. Additionally, the surface curvature effect induced by ultrasonic driving reduces the band gap. It promotes the effective transfer of electrons from Mo atoms in MoSe2 to −NH2 in benzylamine, thereby facilitating the activation of the benzylamine molecule. As a result, the synergistic effects of the piezoelectric and curvature characteristics significantly enhance the photocatalytic performance of MoSe2 toward the C–N coupling of benzylamine. This study not only provides new insights into interfacial reaction mechanisms in piezoelectric photocatalysis but also offers a novel perspective for designing high-performance catalytic systems.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yuzhe Liu,Qi Li,Yuhan Liang,Junhao Liang,XuLei Sui,Zhenbo Wang
The non-precious metal Fe-N-C catalyst is regarded as a potential substitute for the precious metal catalysts for the oxygen reduction reaction (ORR) application. However, its catalytic activity and stability still fall short of those of the precious metal catalysts. Here, Fe-N-C catalyst with an ordered macroporous framework was achieved through using polystyrene (PS) as templates. The results indicate the particle size and structural orderliness of PS templates have great influence on the morphology and the catalytic performance of the obtained Fe-N-C catalysts. The optimized catalyst, derived from ordered PS with 200 nm, exhibits exceptional ORR activity in acidic media with a half-wave potential of 0.885 V (vs. RHE), surpassing commercial Pt/C (0.847 V) and Fe-N-C without PS counterparts (0.796 V), and superior mass activity (26.54 A g⁻¹, 0.8 V) and kinetic current density (14.7 mA cm⁻²,0.85 V), while maintaining outstanding durability under 30,000 potential cycles (18 mV loss). The catalyst, as the cathode in an H₂/O₂ fuel cell, exhibits a peak power density of 0.83 W cm⁻². This excellent activity arises from its regular morphology combined with ordered macroporous framework facilitating active site exposure and reactant diffusion. The regularly arranged template-induced structural ordering enhances the graphitization and integrity of carbon matrix during pyrolysis, promoting the stability. These findings establish a template-size-dependent design principle for non-precious metal catalysts, offering a viable pathway to balance activity-stability trade-offs in proton-exchange membrane fuel cells and related electrochemical energy technologies.
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