NANO
·
2022
·
IF 1.438
X. Du,L. Wang,Q. Xia,Q. Hu,A. Zhou
For lithium-ion batteries (LIBs) with high energy density, it is critical to develop reliable and high-capacity anode materials. In this work, d-Ti 3 C 2 T x /h-BN hybrid layered nanocomposites with uniform distribution are synthesized using a simple liquid phase blending method and investigated as an anode material for LIBs. The results reveal that the uniformly dispersed h-BN anchored on the d-Ti 3 C 2 T x nanosheets can effectively prevent the d-Ti 3 C 2 T x nanosheets from restacking during charging and discharging processes, as well as improve the electronic conductivity. The studies show that the electrochemical performance, such as the capacity and cyclic stability, of d-Ti 3 C 2 T x /h-BN electrode is better than that of pure d-Ti 3 C 2 T x materials.
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ACS Catalysis
·
2022
·
IF 13.7
Shuangxi Lin,Qiang Wang,Maoshuai Li,Ziwen Hao,Yutong Pan,Xiaoyu Han,Xiao Chang,Shouying Huang,Zhenhua Li,Xinbin Ma
Controlling the selectivity of CO2 hydrogenation by catalysis is a fundamental challenge. This study examines the interrelation between active sites and reaction pathways in Ni-catalyzed CO2 hydrogenation. The alloying of Ni with Zn to charged (Niσ––Znσ+) active sites modifies the electronic structure and d-band center, weakens the interaction with CO/H2, and preferentially catalyzes the reverse water gas shift to CO with the thermodynamically favored methanation pathway switched off. The charged dual sites can stabilize the activated CO2 species in a η2(C, O) bridge configuration, directly dissociate the C═O bond to *CO, and promote CO desorption. The mechanistic investigation has elucidated the reaction pathways in the Ni-catalyzed CO2 hydrogenation and identified the crucial intermediates that impacted the product selectivity, which can provide a theoretical guide for the Ni-based catalyst design.
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Advanced Materials Interfaces
·
2022
·Vol. 9
·期 23
·2200913
·
IF 6.389
Jiameng Liu,Shuangrun Zhao,Changbao Wang,Bin Hu,Linghao He,Minghua Wang,Zhihong Zhang,Miao Du
A series of semiconductive cobalt-based metal–organic framework (MOFs) are prepared in this work using 2,3,6,7,10,11-hexaiminotriphenylene (HATP) as ligand and diverse metal ions as the second coordination centers (M = Mn, Ni, and Zn) (denoted as Co x M 3-x (HITP) 2 MOFs). The series of bimetallic Co x M 3-x (HITP) 2 MOFs exhibit ultrathin graphene-like nanostructure, highly d–π conjugated network, large specific surface areas, and diverse metal coordination modes. Density functional theory calculations reveal the unique synergism between M (M = Mn, Ni, and Zn) and Co nodes, in which adjacent layers of M atoms can efficiently modulate the electron densities of Co atoms in Co 3 (HITP) 2 . As compared, Co x Zn 3-x (HITP) 2 MOF possesses substantially enhanced electron density around the Co atoms, dual-metal atomic sites, and rich metal coordination modes, and exhibits superior electrochemical activity. Among them, Co x Zn 3-x (HITP) 2 displays the outperformed electrocatalytic performances of the oxygen evolution reaction (OER). Particularly, Co x Zn 3-x (HITP) 2 shows the lowest overpotential of 210 mV and good long-term stability. This work develops an efficient strategy for designing and regulating atomically dispersed catalysts in conductive MOFs toward clean energy applications.
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INORGANICA CHIMICA ACTA
·
2020
·
IF 2.304
Yan-Long Lan,Xiao-Zeng Li,Tian-Sheng He,Li-Na Zhu
Three coordination polymers (CPs) {[CuL 2 Br]Br·6H 2 O} ∞ (1), {[CuL 2 Cl 2 ]·2.5CH 3 OH·3.5H 2 O} ∞ (2) and {[NiL 2 (NO 3 ) 2 ]·CH 3 CN·3CH 3 OH·H 2 O} ∞ (3) were prepared using a new d -ribose derivative ligand L ( L = 1,2,3,4-tetrakisisoniacyl- β - l -ribopyranose). X-ray single crystal analysis revealed that 1 – 3 all crystallized in the triclinic P 1 space group, all the CPs have 1-D metallomacrocycle strand structures, all the L ligands in the CPs show the same chiral type, and there are four pyridyls bonding with each metal centre arranged into a Δ-propeller configuration in all the three CPs. The same chiral type of the space group and the same chiral type of the propellers should be determined by the same chiral type of the L ligands. In addition, the slightly soluble powders of 1 and 2 displayed probe functions of detecting cysteine, glutathione and N -acetyl cysteine in UV–Vis spectrophotometric analysis of suspensions, which extended the application of UV–Vis spectrophotometry into suspension systems of micron particles.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
He Chen,Chunhong Qi,Luyan Shen,Qiang Fu,Zhiqiang Wang,Zhiyuan Xiong,Youyi Sun,Yaqing Liu
The reduced graphene oxide (rGO) nanosheets were modified by using polymeric nanospheres to adjust the d-spacings between dry rGO nanosheets. The experimental and computational studies show that the incorporation of polymeric nanospheres can effectively increase the d-spacing between dry rGO nanosheets, and meanwhile provide good compatibility of rGO with organic solvents. Specifically, when the d-spacing between nanosheets is greater than 14.0 nm, the dried rGO nanosheets can be well redispersed and stabilized in various organic solvents. This study thus provides a new technology that can produce dry rGO nanosheets with good re-dispersibility and stability in various organic solvents on a large-scale in a more environmental friendly manner.
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APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2023
·
IF 3
Zhao Xia,Guo Meijing,Li Xian,Liu Bo,Li Binglin,Wang Jiao
Phospholipase D (PLD) with the higher transphosphatidylation activity was screened from Streptomyces sp. LD0501 basing on the protoplast mutagenesis technology. Then, it was successfully bio-imprinted to form a hyperactivated structure and rigidified by the intramolecular cross-linking, which was immobilized on the nonporous nanoscale silica. Characterization techniques were employed to investigate the structure and physicochemical properties of the catalysts, including Fourier transform infrared (FTIR) spectra and scanning electron microscopy (SEM) analysis. Transphosphatidylation activity and selectivity were improved significantly when immobilized PLD was used. The maximum yield for the production of phosphatidylserine (PS) reached 97% and the side reaction, the hydrolysis, was minimized. These results were further confirmed by the nuclear magnetic resonance (NMR) and mass spectrometry (MS) analysis. The imprint-induced characteristics of PLD was successfully “remembered” even in the present of much water. In addition, this immobilized hyperactivated PLD showed the excellent operational stabilities and environmental tolerances. Graphical abstract
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PubMed
高影响因子
Frontiers in Endocrinology
·
2023
·
IF 5.2
Tingwan Du,Lian Xiang,Jingjing Zhang,Chunmei Yang,Wenxin Zhao,Jialu Li,Yong Zhou,Ling Ma
Introduction The study aimed to explore the association of serum 25(OH)D 3 and hepatic steatosis in non-alcoholic fatty liver disease (NAFLD) patients and to determine whether the effect of vitamin D (VD) is mediated by activation of the peroxisome proliferator-activated receptor α (PPARα) pathway. Methods The study contained a case-control study, in vivo and in vitro experiments. A case-control study was conducted to compare serum parameters between NAFLD patients and controls and to evaluate the association of 25(OH)D 3 and NAFLD. In vivo study, male Wistar rats were randomly divided into control and model groups, fed a standard chow diet and a high-fat diet (HFD), respectively, for 7 weeks to generate an NAFLD model. Then, the rats were treated with VD and a PPARα antagonist (MK886) for 7 weeks. Tissue and serum were collected and assessed by biochemical assays, morphological analysis, histological analysis, and western blot analysis. In vitro , HepG2 cells were incubated with oleic acid (OA) to induce steatosis, which was evaluated by staining. HepG2 cells were pretreated with MK886 followed by calcitriol treatment, and differences in lipid metabolism-related proteins were detected by western blot. Results NAFLD patients were characterized by impaired liver function, dyslipidemia, and insulin resistance. Serum 25(OH)D 3 was negatively associated with alanine aminotransferase (ALT) in NAFLD. VD deficiency was a risk factor for patients with no advanced fibrosis. Adequate VD status (25(OH)D 3 >20 ng/mL) had a protective effect in patients after adjustment for confounding variables. NAFLD rats showed hyperlipidemia with severe hepatic steatosis, systematic inflammation, and lower serum 25(OH)D 3 . VD treatment ameliorated hepatic steatosis both in NAFLD rats and OA-induced HepG2 cells. Further, MK886 inhibited the anti-steatosis effect of VD. Conclusion The study revealed that an adequate VD level may act as a protective factor in NAFLD and that VD may alleviate hepatic steatosis via the PPARα signaling pathway.
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ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Yifan Chen,Juan Qiao,Qianrong Liu,Mingming Zhang,Li Qi
Papain-stabilized gold nanoclusters ( [email protected] ) with a red fluorescence emission at 639 nm have been generated successfully in aqueous solution. The fluorescence of [email protected] could be quenched in the addition of Cu 2+ . Subsequently, a unique fluorescent probe based on [email protected] 2+ complex has been constructed for sensitive, selective and “turn-on” detection of D-penicillamine (D-pen). The sensing probe has exhibited a remarkable fluorescence enhancement in the presence of D-pen, which can be measured ranging from 30.0 μM to 2.0 mM (r 2 = 0.991) with the detection limit of 5.0 μM. Furthermore, the developed assay has been utilized to explore the metabolic process of D-pen in rats after intraperitoneal injection. As far as we concerned, the present study has reported the first analytical method for sensing serum D-pen in real time by using the fluorescent [email protected] 2+ complex. Our strategy paves a way for digging up the biological and clinical application of the fluorescent AuNCs.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiao Li,Yalan Liu,Xiaoqian Zhu,Gang Chang,Hanping He,Xiuhua Zhang,Shengfu Wang
Electrochemical sensors now play an important role in analysis and detection of nucleic acids. In this work, we present a novel double-signal technique for electrochemically measuring the sequence and length of the d(CAG)n repeat. The double-signal technique used an electrochemical molecular beacon (a hairpin DNA labeled with ferrocene), which was directly modified on the surface of a gold electrode, while a reporter probe (a DNA sequence labeled with horseradish peroxidase) was hybridized to the target DNA. First a simple single-signal sensor was characterized in which d(CAG)n repeats were detected using a short reporter DNA strand labeled with horseradish peroxidase. To obtain a reliable signal that was dependent on repeat number, a double-signal biosensor was created in which the single strand capture DNA in single-signal sensor was replaced by an electrochemical molecular beacon labeled with ferrocene. When the hairpin DNA hybridized to the target–reporter DNA complex, it opened, resulting in a decreased ferrocene current. Both electrochemical biosensors exhibited high selectivity and sensitivity with low detection limits of 0.21 and 0.15 pM, respectively, for the detection of d(CAG)n repeats. The double-signal sensor was more accurate for the determination of repeat length, which was measured from the ratio of signals for HRP and ferrocene (H/F). A linear relationship was found between H/F and the number of repeats (n), H/F = 0.1398n + 9.89788, with a correlation coefficient of 0.974. Only 10 nM of target DNA was required for measurements based on the value of H/F in the double-signal technique. These results indicated that this new double-signal electrochemical sensor provided a reliable method for the analysis of CAG trinucleotide repeats.
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POLYMER BULLETIN
·
2015
·Vol. 72
·期 6
·1531-1543
·
IF 1.438
Zhou Zhihua,Huang Huihua,Huang Tianlong,Peng Cheng,Zhou Hu,Liu Qingquan,Zeng Wennan,Liu Lihua,Cao Dafu,He Siliang,Xiang Liujiao,Yan Hua
Novel maleated poly( d , l -lactide- co -glycolide) (MPLGA) was melt copolymerized directly from maleic anhydride, d,l -lactide and glycolide monomers with stannous octoate as catalyst and benzoyl peroxide as initiator. FTIR, 1 H NMR, GPC and maleation content were employed to qualitatively characterize the synthesized MPLGA. The effects of the catalyst dosage, reaction time and reaction temperature on weight average molecular mass, polydispersity index and maleation content of MPLGA were also investigated. The results indicated that the novel MPLGA was successfully obtained using melting-copolymerization method. MPLGA, with a weight average molecular mass of about 5.39 × 10 4 Da, a polydispersity index of 1.51 and a maleation content of 7.1 wt%, was obtained when polymerization was conducted with catalyst dosage of 0.03 wt% for 36 h at 140 °C. The results indicated that the introduction of maleic anhydride into PLGA may offer new and important options for biomaterial applications.
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RSC Advances
·
2015
·Vol. 5
·期 36
·28233-28241
·
IF 3.84
Yuhe Xiu,Angjun Chen,Xuerui Liu,Chen Chen,Jizhong Chen,Li Guo,Ran Zhang,Zhenshan Hou
Novel polymer-supported Brønsted acid polymer catalysts have been successfully synthesized by radical polymerization, followed by a simple solvothermal route and ion exchange step. The as-synthesized co-polymers were characterized by Elemental Analysis, FT-IR spectroscopy, thermogravimetric analysis and scanning electron microscopy and then were employed as a heterogeneous catalyst for dehydration of sorbitol. Especially, the polymer catalysts have a unique advantage of adjustable Brønsted acidity, and the polymer with 1.82 mmol g−1 of Brønsted acidity was a very efficient catalyst for highly selective dehydration of sorbitol into 1,4-anhydro-D-sorbitol. The dehydration reaction can be completed within 4 h and the selectivity of 1,4-anhydro-D-sorbitol achieved 90%. Moreover, the present catalysts resisted acid-leaching and can be recycled in five consecutive cycles without obvious loss of activity.
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Materials
·
2017
·Vol. 10
·期 8
·879
·
IF 2.654
Tao Chen,Cong Zhang,Yuemei Qin,Haiguan Yang,Peng Zhang,Fanggui Ye
A cationic porous framework with mobile anions (MIL-101(Cr)-Cl) was easily and successfully synthesized by utilizing the stronger affinity of F−to Al3+than Cr3+in the charge-balanced framework of MIL-101(Cr). The structure, morphology and porosity of MIL-101(Cr)-Cl were characterized. The obtained new materials retain the high surface area, good thermostability, and structure topology of MIL-101(Cr). With the mobile Cl−anion, MIL-101(Cr)-Cl can be used as an ion-exchange material for anionic organic pollutions. In this work, 2,4-dichlorophenoxyacetic acid (2,4-D) was used as a model to test the absorption performance of this new material. This new material exhibited improved adsorbability compared to that of the original metal-organic frameworks (MOFs). At the same time, this material also shows high anti-interference performance with changing solution pH.Keywords:adsorption;2,4-dichlorophenoxyacetic acid;ion exchange;metal-organic frameworks
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