ELECTROCHIMICA ACTA
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2011
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IF 3.65
Yonghai Song,Zhifang He,Haozhi Zhu,Haoqing Hou,Li Wang
Cobalt nanoparticles (Co NPs) attached to graphene modified glassy carbon electrode (GCE) were prepared by electrodepositing. Atomic force microscopy image showed that many Co NPs with relative homogeneous size were formed and uniformly dispersed on the graphene/GCE. X-ray diffraction spectrum showed the as-prepared Co NPs was of the cubic phase of metal Co. The electrochemical behavior and electrocatalytic performances of the Co NPs/graphene/GCE towards the oxidation of cysteine and N-acetyl cysteine were evaluated by cyclic voltammograms, chronoamperometry and amperometric method . These results showed a good electrocatalytic activity for the two amino acids . The good catalytic activity , high sensitivity and well stability made this Co NPs/graphene/GCE to be a promising electrode for constructing a nonenzymatic sensor.
研究领域:
电分析化学
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纳米生物技术
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生物传感器
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电化学传感
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分子诊断
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ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
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2022
·Vol. 237
·期 6
·1051-1053
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IF 0.365
Hua-Xiang Zhang
C 33 H 40 CdN 8 O 6 , triclinic,
P
1
‾
(no. 2), a = 10.6468(11) Å, b = 11.6739(9) Å, c = 14.5312(9) Å, α = 93.976(5)°, β = 102.005(7)°, γ = 111.827(8)°, V = 1618.4(2) Å 3 , Z = 2, R
gt ( F ) = 0.0480, wR
ref ( F
2 ) = 0.1102, T = 293(2) K.
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Inorganic and Nano-Metal Chemistry
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2017
·
IF 0
Huimin Li,Shasha Li,Yuanrui Wang,Yafeng Li,Qian Qiao
In this article, two novel metal-organic frameworks (MOFs) have been constructed by tuning the metal ions using identical ligand—FDA. Although both of them contain linear trinuclear secondary building unit (SBU) and infinite chain along with SBU, the different metal ions as node can result in the different connection of FDA. As a result, compound I shows 4,4-networks, and compound II contains 3-ring and 4-ring.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hao Yang,Junbin Xie,Xiangyu Li,Zhao Liu,Guixiang Teng,Zhongli Zhao,Jie He,Chun Zhang
Given the accelerated pace of industrial development and the escalating issue of water pollution, the development of high-efficiency and energy-saving materials for the degradation of organic pollutants is imperative. Consequently, the development of heterojunction photocatalytic materials has emerged as one of the most promising strategies. In this study, n-type semiconductor ZnFe 2 O 4 nanorods and p-type semiconductor BiOI nanoflowers were utilized to construct a type p-n heterojunction ZnFe 2 O 4 /BiOI, exhibiting a significantly larger specific surface area of 38.72 m 2 /g, which is 4.6 times greater than that of ZnFe 2 O 4 (8.30 m 2 /g). The density functional theory calculations reveal that the formation of the heterojunction substantially improves the electron transport efficiency and markedly suppresses the recombination of photogenerated charge carriers, primarily due to the establishment of a p-n heterostructure. Moreover, the degradation efficiency of tetracycline achieved an impressive rate of 94.8 %. The degradation efficiency remained above 90 % following three photocatalytic reaction cycle tests.
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JOURNAL OF ORGANIC CHEMISTRY
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2025
·
IF 3.6
Jian Wang,Xinxin Zhao,Wenda Li,Kehan Liu,Zuyue Tu,Xiangyu Zeng,Zhihui Wang,Yijia Wang,Ting Li,Ming Chen
A green and efficient method for the assembly of N-acylureas through an NIS-promoted Hofmann-type rearrangement has been described. The advantages of this protocol include mild, metal-free conditions, operational simplicity, broad substrate scope, good functional group tolerance, and high chemoselectivity. The potential practicability and synthetic utility were demonstrated by its easy scalability and application in the concise synthesis of commercial pesticides and drugs. The process of the transformation in our work integrates an unconventional acyl transfer mechanism into the well-established framework of the classical Hofmann rearrangement, which enables the direct conversion of 2-oxoamides to acyl isocyanates.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Liquan Xiong,Ying Wang,Di Gao,Yueqi Song,Dongsheng Chen
Hydrogen energy is the core of future clean energy, and the study of hydrogen evolution reaction (HER) electrocatalytic mechanisms is essential for efficient production. The development of efficient and low-cost electrocatalysts is a key challenge in achieving ideal hydrogen generation. In this study, a Ni-BDC/TpPa-1 heterojunction material was prepared for the first time, which was converted into a derived heterojunction material (NiO@Ni/N-C) after high-temperature pyrolysis treatment, exhibiting excellent electrocatalytic activity in an alkaline solution. Without iR compensation, the overpotential of HER is only 83 mV at a current density of 10 mA·cm⁻². Compared with thermally decomposed Ni-BDC and TpPa-1 monomer, its electrocatalytic activity is improved by 158 and 435 mV, respectively, and it exhibits excellent stability over 100 h. The design of this novel material offers a new solution for enhancing the efficiency of transition-metal-based catalysts.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Manli Wang,Zhicheng Liu,Ming Hou,Xu Luo,Wenbin Yang,Hongjie Zhang,Xiaoming Song,Zhigang Shao
The irreversible degradation of platinum-based catalysts caused by strong sulfur dioxide (SO₂) adsorption poses a primary obstacle to the oxygen reduction reaction (ORR), limiting the practical application of proton exchange membrane fuel cells. Herein, we design and synthesize an anti-SO 2 poisoning Pt-based catalyst comprising Pt nanoparticles anchored on a single-atom Ni-N-HCNs support. The obtained catalyst (Pt/Ni-N-HCNs) exhibits exceptional tolerance to SO₂ poisoning, demonstrating a minimal negative shift of only 47.7 mV in the half-wave potential after contamination, compared to the 79.4 mV shift observed for commercial Pt/C. More importantly, Pt/Ni-N-HCNs catalyst demonstrates significantly enhanced ORR performance, with a mass activity of 0.58 A mg Pt −1 and a specific activity of 1.57 mA cm −2 , representing 1.2-fold and 2.7-fold improvements over commercial Pt/C, respectively. Density functional theory (DFT) calculations and XPS results reveal that the strong metal-support interaction (SMSI) induces the downshift of the d-band center of Pt, thereby weakening SO 2 adsorption and facilitating SO 2 removal. Furthermore, the Ni N site in Ni-N-HCNs support exhibits high activity for SO 2 oxidation, promoting the effective removal of SO 2 from adjacent Pt sites. Both effects synergistically enhance the resistance to SO 2 poisoning of the Pt/Ni-N-HCNs catalyst without sacrificing ORR performance. This work provides insights into the design of poison-resistant electrocatalysts and the development of energy conversion systems with high environmental applicability.
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Marine Drugs
·
2026
·Vol. 24
·期 2
·84
·
IF 5.7
Wenjie Wang,Kun Gao,Guantian Li,Zongji Wang,Kecheng Li,Song Liu,Huahua Yu,Ronge Xing
Type 2 diabetes mellitus (T2DM) is one of the most prevalent chronic metabolic diseases, and inhibition of α-glucosidase activity represents an effective therapeutic strategy. Chitin is the most abundant renewable polysaccharide in the ocean, with its monosaccharide beingN-acetylglucosamine (NAG). To evaluate the potential of NAG glycosides as novel α-glucosidase inhibitors, three common phenolic compounds were modified via NAG glycosylation. Their inhibitory activities were assessed at both the enzymatic and cellular levels. In addition, density functional theory (DFT), molecular dynamics (MD) simulations, and molecular docking analyses were employed to systematically investigate the effects of NAG glycosylation on enzyme inhibition and the underlying mechanisms. Compared with the parent phenolic compounds, NAG glycosides exhibited significantly enhanced α-glucosidase inhibitory activity, with NAG introduction markedly improving their binding affinity to α-glucosidase. Among them, glycoside3adisplayed the optimal inhibitory effect, comparable to acarbose, and at the cellular level, its activity at high concentrations was comparable to or slightly higher than that of metformin. Circular dichroism (CD) and MD analyses indicated that glycoside3aincreased the conformational flexibility of key residues and enhanced the structural looseness of the enzyme, thereby inhibiting its activity. NAG glycosides constitute a promising class of marine-derived α-glucosidase inhibitors, warranting further structural optimization and rational design to enhance their activity and selectivity.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
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2026
·Vol. 37
·期 1
·32
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IF 4.5
Yuanzheng Wang,Qilin Jiang,Xin Huang,Shaohong Wu,Jinlong Li,Jian Cao,Zhongxing Liu
The development of bone repair scaffolds has long been a research hotspot in tissue engineering. Owing to its unique capability for personalized customization of scaffold geometry and microstructure, 3D printing technology has been extensively adopted for fabricating bone repair scaffolds. Poly-L-lactic acid (PLLA), endowed with favorable biodegradability, excellent biocompatibility, and reliable in vivo safety, is widely used as a matrix material for 3D printed bone repair scaffolds. PLLA is a bioinert polymer characterized by inferior cell adhesion and osteogenic differentiation capabilities. To mitigate this bioinertness limitation, the present study employed N-methylpyrrolidone (NMP) etching to modify the surface of 3D-printed PLLA bone repair scaffolds. Following NMP etching for 1–24 h, the originally smooth scaffold surface evolved into a hierarchical, petal-like gradient microstructure, accompanied by a marked increase in surface roughness. Correspondingly, the hydrophilicity of the treated scaffolds was also enhanced. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analyses further confirmed that the crystallinity of PLLA in the scaffolds was significantly enhanced. Concomitantly, the modified scaffolds exhibited a marked improvement in adsorption capacity for green fluorescent protein (GFP), while the adhesion and proliferation of MC3T3-E1 on their surface were also significantly promoted. In vivo animal experiments demonstrated that the NMP-etched scaffolds could accelerate the process of bone defect repair. Collectively, surface modification of 3D-printed PLLA bone scaffolds via NMP etching enables precise modulation of their physicochemical properties, thereby effectively mitigating the inherent bioinertness limitation of PLLA scaffolds. Graphical
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Dan Liu,Zicheng Wang,Zichen Guo,Yuan Tian,Cheng Wang
Freestanding electrodes with high energy density and cycle stability have attracted attention on the development of lithium-sulfur (Li-S) batteries. However, both severe shuttle effect and sluggish conversion kinetics hinder their practical applications. Herein, we employed the electrospinning and subsequent nitridation processes to prepare a necklace-like structure of CuCoN 0.6 nanoparticles anchored on N -doped carbon nanofibers (CuCoN 0.6 /NC) as freestanding sulfur host for Li-S batteries. Such bimetallic nitride boosts chemical adsorption and catalytic activity throughout detailed theoretical calculation and experimental electrochemical characterization. The three-dimensional conductive necklace-like framework could provide abundant cavities for realizing high sulfur utilization and alleviating the volume variation, as well as fast lithium-ions diffusion and electron transfer. The Li-S cell with the S@CuCoN 0.6 /NC cathode delivers a stable cycling performance with a capacity attenuation rate of 0.076% per cycle after 150cycles at 2.0C and an exceptional capacity retention of 657 mAh g −1 even at a high sulfur loading of 6.8 mg cm −2 over 100cycles. The facile and scalable method can help promote the widespread application of fabrics.
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CHEMICAL ENGINEERING JOURNAL
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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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Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Guihua Cui,Yu Bai,Wenliang Li,Zhengguo Gao,Shuiying Chen,Nannan Qiu,Toshifumi Satoh,Toyoji Kakuchi,Qian Duan
A series of chain-end functional polymers composed of poly( N -isopropylacrylamide) (PNIPAM) and 2-amino-2-deoxy- d -glucopyranose( d -glucosamine, GA) was synthesized via atom transfer radical polymerization (ATRP). Novel fluorescent complexes of glucosamine-PNI- PAM/Eu(III) were then formed by chelation of the polymers and europium(III) ions. The aqueous solutions of the polymers and its Eu(III) complexes exhibited a lower critical solution temperatures (LCSTs), and which were approximately equal to body temperature. Cell viability assays suggested that these thermosensitive polymers and Eu(III) complexes showed excellent biocompatibility in vitro.
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危险品化学品经营许可证（带存储）