ELECTROCHIMICA ACTA
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2021
·
IF 6.901
Zepeng Kang,Yuanming Wang,Chennan Yang,Bing Xu,Lei Wang,Zhiguang Zhu
Herein, a novel N and O co-doped three dimensional (3D) hybrid carbon aerogel (CA) was prepared by a two-step carbonization technology, i.e. preoxidation process (240 °C, air atmosphere) and carbonization process (600∼1000 °C, nitrogen atmosphere). It was found that the peroxidation process could improve the thermostability and heteroatoms content during the carbonization. The obtained CA samples inherited their original morphology of “string-bead” network and had a higher heteroatoms content, while the control samples did not. We focused on the application of this CA in either lactate oxidase-modified, super-capacitive and oxygen reductive electrodes. The fabricated lactate-powered integrated electronic skin could produce a maximum power density of ca. 1.3 mW cm −2 , which allowed powering a multiplexed metabolic electronic in situ . The sample of CF-PVA-PANI 800 showed the highest specific capacitance of 427.2 F g −1 at a discharge specific current of 0.5 A g −1 . The synergistic effect of the N functionalities endowed the sample of CF-PVA-PANI 900 with similar electrocatalytic activity to a 20 wt% commercial Pt/C catalyst for ORR. This fabrication strategy of carbon aerogel may provide a new alternative for preparing more heteroatom-doped 3D carbon materials in future.
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FUEL
·
2019
·
IF 5.128
Xiaodong Li,Yanli Huang,Qian Zhang,Zhijun Zuo,Xiaodong Wang,Vladimir A. Vinokurov,Zheng Wang,Wei Huang
Ni-MoCeZr-MgAl(O) mixed oxide catalysts were successfully prepared from the Ce, Zr and Mo promoted hydrotalcite-like compounds (HTLcs) precursors using the simple and effective hexamethylenetetramine(HMT)-assisted hydrothermal synthesis method by tuning the molar ratio of n(HMT)/n(NO 3 − ). The influence of Ni content (3, 4.8, 6, 9 and 12%) on the catalytic performance of these catalysts in dry reforming of methane (DRM) was focused. Adjusting the content of Ni was able to change the metal dispersion and metal particle size, and small-sized (around 7 nm) and evenly dispersed Ni particles were obtained at Ni content of 6%. The catalyst with 6% Ni loading stood out for the high activity and stability, the CH 4 conversion of which fluctuated around 95% continuously for 610 h under GHSV of 60,000 mL·g cat −1 ·h −1 , and it was still above 92.8% throughout the 36-h-duration DRM experiments under GHSV of 80,000 mL·g cat −1 ·h −1 . This research may provide a simple and effective methodology for the synthesis of stable and efficient DRM catalysts.
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JOURNAL OF CHEMICAL RESEARCH
·
2020
·
IF 0.593
Zhenzhen Geng,Hong-yu Zhang,Guohui Yin,Yuecheng Zhang,Jiquan Zhao
The ionic liquid 1-methyl-3-(3-sulfopropyl)imidazolium chloride ([MIMPs]+Cl-) in combination with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and sodium nitrite (NaNO2) as a catalytic system demonstrates high efficiency in the one-pot two-step aerobic oxidative condensation of benzyl alcohols with 1,2-phenylenediamines to give benzimidazoles. Various benzimidazoles are obtained in good to excellent yields by this strategy.
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JOURNAL OF INORGANIC BIOCHEMISTRY
·
2021
·
IF 4.155
Yueqin Li,Changhao Qian,Yun Li,Yong Yang,Dong Lin,Xiaohui Liu,Chen Chen
Two novel Fe(III) complexes, Fe(HL 1 ) 2 Cl·1.25H 2 O ( 1 ) and Fe(HL 2 ) 2 ·Et 3 NH·H 2 O ( 2 ) (H 2 L 1 = o -vanillin benzoylhydrazone, H 3 L 2 = o -vanillin salicylhydrazone) are prepared. X-ray single crystal diffraction confirms that the hydrazone ligands can be chelated to iron centre resulting in a six-coordinate octahedral configuration. Both complexes show major intercalation effect to the herring sperm deoxyribonucleic acid (HS-DNA) with high binding constants of 2.01 × 10 4 M −1 and 2.24 × 10 4 M −1 , respectively. Molecular docking studies reveal both complexes can intercalate at the gap of DC5-DG2 and DG6-DC1 base pairs of DNA hexamer (1Z3F). The interaction of the complex 1 with plasmid pBR322 DNA induces distinguishable alterations of the DNA morphology. Further, the structure of plasmid pBR322 DNA treated with complex 1 in the presence of ascorbic acid has been damaged probably due to the reactive oxygen species (ROS) generation. What's more, both complexes show high affinity with bovine serum albumin (BSA), the binding constants measured by fluorescence techniques are 5.75 × 10 6 M −1 and 4.39 × 10 7 M −1 , respectively. Molecular docking demonstrates that the complexes prefer the binding pocket of site III (subdomain IIB) of BSA (PDB ID: 4F5S ). Similarly, dynamic light scattering (DLS) reveals that the complexes not only bind to BSA but also induce bigger size aggregates as the concentration increases.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Xiang Ye,Wen Chen,Fu-Jie Yan,Xiao-Dong Zheng,Peng-Cheng Tu,Peng-Fei Shan
Berries and their functional components have been put forward as an alternative to pharmacological treatments of type 2 diabetes mellitus (T2DM), and more attention has been paid to the gut microbiome in the pathophysiology of T2DM. Thus, we tried to examine the metabolic impact of red bayberry-derived cyanidin-3-O-glucoside (C3G) and investigate whether the antidiabetic effects of C3G were associated with the gut microbiome. As a result, C3G administration was found to reduce blood glucose levels of diabetic db/db mice, accompanied by increased levels of glucagon-like peptide (GLP-1) and insulin. Moreover, 16S rRNA analysis showed that the dominant microbiota modulated by C3G were pivotal in the glucose metabolism. Furthermore, the modulation of C3G on metabolic activities of gut bacteria leads to an increase in intestinal levels of key metabolites, particularly short-chain fatty acids. This contribution helps in promoting the secretion of GLP-1, which in turn increases insulin release with the purpose of reducing blood glucose levels. Overall, these findings may offer new thoughts concerning C3G against metabolic disorders in T2DM.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2016
·
IF 3.138
Shicheng Lei,Minhao Xie,Bing Hu,Li Zhou,Yi Sun,Muhammad Saeeduddin,Hongcheng Zhang,Xiaoxiong Zeng
In the present study, pear polyphenol oxidase (PPO) was purified, immobilized and applied for the synthesis of theaflavin-3,3′-digallate (TF3). Firstly, PPO of pear ( Pyrus bretschneideri Rehd cv. Huangguan) was purified 24.36-fold in specific activity with a recovery of 6.77% by sequential use of precipitation with 70% saturated ammonium sulfate and chromatography of DEAE-Sepharose Fast Flow column. The purified pear PPO, found to be a dimer of identical subunits of molecular mass 35 kDa, was then successfully immobilized onto Fe 3 O 4 /chitosan nanoparticles via glutaraldehyde coupling reaction. Finally, TF3 was effectively synthesized by applying the immobilized PPO as biocatalyst with epicatechin gallate (ECG) and epigallocatechin-3- O -gallate (EGCG) as substrates, and the maximum yield of TF3 was 42.23% based on the amount of ECG added. In addition, the immobilized enzyme still remained 85% of its initial ability after successive usage of 8 cycles and could be stored for 30 days with less loss of activity. All the results suggest that the developed procedure is quite useful and has great potential for synthesis of TF3 and other theaflavins.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qianyu Zhao,Hua Zhang,Haitian Zhao,Jia Liu,Jingyi Liu,Zilong Chen,Bin Li,Xiaojun Liao,Joe Mac Regenstein,Jing Wang,Xin Yang
Seven magnetic covalent organic framework molecularly imprinted polymers with magnetic responsiveness, large specific surface area, and molecular recognition ability were successfully synthesized, suitable for the separation of cyanidin-3-O-glucoside from complex samples. Using a room-temperature synthesis strategy, covalent organic frameworks accompanied by imprinted sites were formed in one step on the functionalized magnetic nanoparticles with 1,6-hexanediamine. The composite materials were easy to prepare and showed high adsorption capacity (127 mg g–1) together with favorable adsorption selectivity for cyanidin-3-O-glucoside over other flavonoids and phenolic acids. Magnetic covalent organic framework molecularly imprinted polymers exhibited good stability in 10 adsorption–desorption cycles. This work established a new method of extracting and separating high-purity anthocyanins and even unstable natural compounds.
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OPTICS LETTERS
·
2025
·Vol. 50
·期 23
·7275-7278
·
IF 3.3
Shiqi Liu,Haixin Wang,Wenhui Fang,Aijun Li,Aijun Li,Zhiwei Men,Zhiwei Men
© 2025 Optica Publishing Group. All rights, including
for text and data mining (TDM), Artificial Intelligence (AI) training,
and similar technologies, are reserved.
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Small
·
2025
·
IF 12.1
Lijuan Liu,Yingqiu Zheng,Wenshu Chen,Yongping Du,Linfeng Hu,Guoqiang Luo,Qiang Shen,Jian Zhang
Alkaline water electrolysis holds potential for large-scale, high-purity hydrogen production. However, the slow kinetics of water dissociation and challenging conditions in alkaline environments complicate the search for an electrocatalyst with both high activity and durability. In this study, a highly active and stable amorphous electrocatalyst is introduced, 3Ni─Co─S─O, developed via a straightforward electrodeposition method for alkaline hydrogen evolution reaction (HER). Notably, the surface of the 3Ni─Co─S─O catalyst undergoes a compositional reconstruction during alkaline HER, yet maintains its amorphous structure. This reconstruction spans roughly 6 µm, leading to a gradual decrease in Ni and S content and a corresponding increase in O concentration toward the surface, thereby forming a stable, gradient active layer. Benefitting from this layer and its amorphous nature, the 3Ni─Co─S─O catalyst demonstrates superior alkaline HER activity—requiring only 170 mV to achieve an industrial HER current density of 1000 mA cm −2 . It also showcases remarkable stability, with a mere 15 mV increase in overpotential during continuous HER at 300 mA cm −2 for 24 h, outperforming the commercial Pt/C catalyst. The research provides a novel approach to designing high-performance amorphous alkaline HER electrocatalysts cost-effectively and contributes insights for understanding and developing advanced amorphous catalysts across various applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhihui Ma,Hongrui Guo,Pengfei Wang,Lichun Dai,Sihui Zhan,Feng Shen
The electrocatalytic oxidation of biomass-derived glucose to formic acid (FA) represents a sustainable route for biomass valorization, yet achieving simultaneous high selectivity and current density remains challenging due to sluggish electron transfer and competing side reactions. Herein, bimetallic oxide ultra-thin nanosheets grown on Ni foam (NiCoO-NS/NF) with established Ni-O-Co electronic channels are fabricated via a facile Cl − corrosion and calcination strategy. The ultra-thin nanosheet structure offers abundant exposed active sites, and the introduced Co 2+ with the unique valence electronic configuration is able to drive the partial electron migration from Ni to Co via the bridging μ-O ligand, forming Ni-O-Co electronic channels. This significantly facilitates electron transport and promotes rapid NiOOH active species formation, as evidenced by in situ spectroscopy measurements and computational analyses. Remarkably, NiCoO-NS/NF exhibits an exceptional GOR current density of 222.70 mA/cm 2 at 1.4 V vs RHE, surpassing NiO-NS/NF and bare Ni foam by 2.29-fold and 7.53-fold, respectively. The enhanced kinetics suppress non-Faradaic degradation, delivering a high Faradaic efficiency beyond 90.00 % within 1 h in 0.1 M glucose. This work provides a novel strategy for constructing electron-channel-rich nanostructures to effectively enhance the performance of glucose electrooxidation over Ni-based catalysts, advancing the development of biomass upgrading.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 27
·15340-15353
·
IF 3.43
Genxing Zhu,Jialu Zhu,Xinlong Fu,Qi Liu,Fengyi Cao,Yu-nan Li,Qi Qin,Mingli Jiao
In this study, Co nanoparticle-embedded N,O-codoped porous carbon nanospheres (C@Co) with abundant N and O doping, high graphitization, large specific surface area (319 m2 g−1) and a well-developed mesoporous structure were synthesized and characterized thoroughly, and were applied to activate peroxymonosulfate (PMS) for the degradation of methylene blue (MB). Various influential factors affecting the catalytic performance including C@Co dosage, PMS dosage, MB concentration, initial pH, temperature, and co-existing common anions and humic acid (HA) on the MB degradation were systematically investigated. The increase of the C@Co dosage (15–60 mg), PMS dosage (25–100 mg) and reaction temperature (278–308 K) promoted the MB degradation in the C@Co/PMS system. The best performance of the C@Co/PMS system was observed under weakly acidic or nearly neutral conditions. Both the MB concentration (25–100 mg L−1) and Cl− (5–100 mM), NO3− (10–500 mM), CO32− (10–300 mM), HCO3− (1–30 mM) and HA (2–40 mg L−1) had an inhibitory effect on MB degradation, and the degree of decrease in MB degradation increased as their concentrations were enhanced. Interestingly, HPO42− (1–100 mM) had an overall inhibitory effect on the degradation process of MB; however, in comparison with lower concentrations (1–10 mM), an attenuation of the inhibitory effect at higher concentrations (50–100 mM) could be observed. Moreover, the C@Co/PMS system also exhibited general applicability in eliminating various organic pollutants from water such as methyl orange, malachite green, safranine T, Congo red, Rhodamine B, ofloxacin and tetracycline. Classical radical-quenching tests and EPR measurements showed that both the non-radical pathway (major route, involving 1O2) and radical pathway (minor route, involving ˙OH, ˙SO4− and ˙O2−) contribute to the MB degradation. DFT calculations disclosed that the combination of Co–C interactions with graphitic N doping brought in catalytically active sites in C@Co where the charge states of some C atoms were significantly increased. The degradation intermediates of MB during the catalytic reaction were also identified by HPLC-MS and the possible degradation pathway was proposed. Overall, the resultant C@Co can be developed as a novel and efficient heterogeneous catalyst for activating PMS to degrade organic pollutants, and has potential application in environmental remediation.
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Catalysts
·
2022
·Vol. 12
·期 12
·1625
·
IF 4.501
Bo Chen,Zhi-Ze Cao,Zhi-Jun Diao,Liang-Qiu Huang,Si-Jia Zhao,Hong Yuan,Jia-Meng He
Hydrogenolysis via targeted depolymerization of C–O linkages is a techno-economic beneficial process for converting lignin into highly valuable chemicals and clean fuels. In this work, a macroporous silicalite-1 (S-1) array-supported Ru-Ni metallic phosphide composite (Ru-Ni12P5/S-15) was prepared as a catalyst and hydrogenolysis activity under relative mild conditions was investigated using a series of compounds containing ether linkages as lignin-related model compounds. The Lewis acid sites originating from the unreduced Ru species and the macroporous geometry of S-1 significantly influenced hydrogenolysis activity and product selectivity. Analysis of the mechanism demonstrated that both the aryl ether and aliphatic ether linkages were directly hydrogenated over Ru-Ni12P5/S-15. 2D-HSQC-NMR spectroscopy demonstrated that the ether linkages of lignin were efficiently cleaved by Ru-Ni12P5/S-15. Furthermore, the obtained liquid hydrogenolysis products are high value-added chemicals used for pharmaceutical production and can be facilely tuned via the reaction conditions.
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