Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 41
·15638-15646
·
IF 8.067
Xiang Li,Xinghuan Hu,Hua Liao,Shuai Yang,Xinyu Li,Qiulian Li,Xin Liu,Yonggang Zhao,Shurong Wang
In this study, a simple and reproducible two-step annealing process was demonstrated to prepare Cu2ZnSn(S,Se)4 (CZTSSe) thin film with band-gap grading by selenization followed by post-sulfo-selenization (PSS) treatment. The effects of PSS treatment on the composition and electrical properties of the CZTSSe thin film were investigated. The crystal structure, surface morphology, surface roughness and element composition of the CZTSSe thin film were characterized by GIXRD, SEM, AFM and EDS tests. The composition of elements at different depths of the thin film was also investigated. It was confirmed that CZTSSe thin film with high sulfur element content on the surface and low at the bottom were obtained after PSS treatment. The electrical performance of the CZTSSe solar cells was measured by Hall test, EQE and J–V. The results showed that the power conversion efficiency (PCE) of the CZTSSe thin film without PSS treatment was only 7.62%, while the PCE of the CZTSSe thin film after PSS treatment increased to 10.11%.
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高影响因子
POLYHEDRON
·
2022
·
IF 2.975
Yan-Ling Deng,Wei Li,Chun-Yang Pan
Two new metal hybrid borates , Na[Ni(py) 2 ] 2 ·[(C 4 H 2 O 6 ) 2 B]·H 2 O (py = pyridine) ( 1 ) and [Cu(H 2 O) 2 (1-EI) 4 ]·[B 5 O 6 (OH) 4 ] 2 ·H 2 O (1-EI = 1-ethylimidazole) ( 2 ), have been successfully synthesized. 1 features an interesting structure based on mixed borate-tartrate motifs. Two tartrate anions are condensed with one BO 4 to form the hybrid anionic group [(C 4 H 2 O 6 ) 2 B] 5− . The structure of 2 is composed of [B 5 O 6 (OH) 4 ] − clusters and [Cu(H 2 O) 2 (1-EI) 4 ] 2+ complexes, which exhibits hydrogen-bonded network formed by [B 5 O 6 (OH) 4 ] − clusters. These compounds are further confirmed by FTIR, PXRD and UV–vis. In addition, the catalyst prepared from 2 shows excellent electrocatalytic oxygen reduction reaction (ORR) activity.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xinshuang Gao,Miaoxia Gong,Hanbo Li,Jia-Jia Zheng,Xiaochun Wu
Capitalizing on the spatiotemporal controllability of localized plasmons, plasmonic nanostructures show great promise in photocatalysis. Herein, using plasmon-mediated azo-dimerization of 4-aminothiophenol (4-ATP) on helical plasmonic nanorods (HPNRs), we demonstrate a unique route to modulate catalytic activity. This approach leverages plasmon-mediated activation of adsorbed oxygen species (one reactant) to control the delivery of free 4-ATP (the other reactant) in the liquid phase to reactive sites, thereby significantly enhancing the formation of azo-coupling product 4,4′-dimercaptoazobenzene (DMAB). Upon plasmon excitation, adsorbed oxygen species on the HPNR surface capture hot electrons and become activated. These photoactivated oxygen species facilitate the transport of free 4-ATP molecules, shuttled outside the surface-stabilizing ligand shell of the HPNR, to surface-active sites and participate in the coupling reaction. Considering tunability of local plasmons, surface ligand design (e.g., bromide ions scavenging holes), and plasmonic nanostructure morphology, this strategy, regulating one reactant’s activation to control another’s, offers distinct advantages for on-demand and site-specific reactions with high selectivity. Our findings highlight a versatile means of modulating reaction activity with potential applications in spatially and temporally controlled catalysis.
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PubMed
高影响因子
IRANIAN POLYMER JOURNAL
·
2014
·Vol. 23
·期 11
·899-906
·
IF 1.469
Lai Jianbin,Yang Fafu,Guo Hongyu,Jiao Ziyu
By introducing 1,2,3-triazole-ester groups on thiacalix[4]arene based on click chemistry and then ammonolysis with ethylenediamine, diethylenetriamine or triethylenetetramine, three novel 1,2,3-triazole-modified thiacalix[4]arene polymers were conveniently prepared in “4+2” condensation mode in ideal yields. The structures of polymers 4a–4c were confirmed by elemental analysis, FTIR and 1 H NMR spectra. The surface morphologies of polymers 4a–4c were investigated by SEM micrographs. The M
n
of novel polymers 4a–4c indicated approximately 18–20 calixarene units in each polymer molecule. The dye adsorption abilities of polymers 4a–4c for series of organic dyes (alizarin green, orange I, neutral red (NR), Congo red (CR), orange G (OG), crystal violet, Victoria blue B and methylene blue) were studied by solid–liquid adsorption experiments. The adsorption experimental results implied that they had excellent adsorption abilities for tested organic dyes. The highest adsorption percentage reached 97 % for OG. The best saturation adsorption capacities for NR and CR were as high as 1.282 and 1.407 mmol/g, respectively. These novel polymers possessed stable adsorption abilities in the scopes of pH 5–9 and had good reused properties after desorption. The adsorption mechanism proposed that not only dipole interaction, electrostatic interaction and hydrogen bonding interaction, but also the π–π stacking interaction plays important role in binding dyes.
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ACTA PHARMACOLOGICA SINICA
·
2026
·
IF 10.4
Chen Chuan-jun,Guo Ding-wen,Yuan Qing-yun,Zhuo You-qiong,Yang Shi-fen,Xu Hao-min,Wang You-rong,Guan Xiao-hui,Deng Ke-yu,Xin Hong-bo
Macrophage migration inhibitory factor (MIF) is a cytokine that possesses multiple enzymatic activities, such as keto-enol tautomerase and thiol-oxidoreductase. We previously found that lack of MIF tautomerase activity significantly alleviated high fat diet (HFD)-induced obesity in mice. In this study, we investigated the regulatory mechanisms of MIF tautomerase in obesity. HFD-induced obese mouse model was established. Adipogenic differentiation was induced in mouse preadipocyte cell line 3T3-L1 and mouse adipose-derived mesenchymal stem cells (ADSCs) in vitro. We showed that MIF tautomerase inhibitors ISO-1 or 4-IPP dose-dependently promoted lipid degradation and mitochondrial thermogenesis by enhancing basal oxygen consumption rate and proton leak, accompanied by increased expression of browning markers (UCP1, PGC-1α, DIO2, CD137) in 3T3-L1 cells under adipogenic induction conditions. In HFD-induced obese mice, administration of 4-IPP (5, 10 mg/kg, i.p.) every 2 days for 12 weeks significantly ameliorated HFD-induced obesity, improved insulin sensitivity, and enhanced energy expenditure. In white adipocytes, 4-IPP (1, 5, 10 μM) dose-dependently promoted CD137 expression, and restored CD137-mediated activation of the PI3K/AKT signaling to improve lipid metabolism. CD137 deficiency abrogated the browning effect of 4-IPP in white adipocytes in vitro. CD137 −/− mice exhibited increased susceptibility to HFD-induced obesity and almost abolished the anti-obesity effects of 4-IPP. Simulation of the protein interaction revealed a direct interaction between MIF and CD137: MIF competitively bound to CD137 on white adipocytes with the endogenous ligand of CD137, which was further confirmed by co-immunoprecipitation. Furthermore, 4-IPP and recombinant CD137 protein inhibited the tautomerase activity of MIF in vitro. In conclusion, MIF promotes obesity by binding CD137 through its tautomerase domain, suppressing CD137-mediated the activation of the PI3K/AKT signaling. MIF tautomerase inhibitors disrupt this interaction, restore CD137 function, and enhance adipocyte browning, offering a promising therapeutic strategy for obesity management.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121838
·
IF 7.5
Yan Wang,Chang Liu,Rong Fu,Chao Wang,Xin Chong,Yuqi Shi,Yuelan Zhang
Although extensive research has explored modulating the built-in electric field (BIEF) and interfacial dipole electric field (IDEF) individually, a strategy leveraging their synergistic interplay for bidirectional electron regulation remains scarcely explored. Herein, a bifunctional FeCoNiP/P-doped g-C 3 N 4 (FeCoNiP/PCN) heterojunction was constructed and confirmed by TEM analysis. XPS and DFT analyses confirmed the co-existence of synergistic dual electric fields: a BIEF directed from PCN to FeCoNiP and an oppositely oriented IDEF, which cooperatively establish a bidirectional charge-transfer channel. This unique dual-field configuration drove highly efficient spatial charge separation, as evidenced by significantly quenched photoluminescence (PL), diminished charge-transfer resistance (EIS), and a markedly enhanced photocurrent response. The synergistic electric fields enabled bidirectional electron flow, thus enabling the simultaneous photooxidation of 4-nitrophenol (4-NP) and its selective reduction to 4-aminophenol (4-AP). The optimized FeCoNiP/PCN heterojunction showed significantly enhanced catalytic performance, achieving a 91 % degradation of 4-NP within 1.5 h with a rate constant 4 times and 25 times higher than pristine PCN and FeCoNiP, respectively. Moreover, it exhibited bifunctional performance, reducing 100 mg/L 4-NP nearly completely to 4-AP within only 4 min. The superior performance is primarily attributed to the synergistic interplay between the BIEF and IDEF, which efficiently lowers energy barriers and orchestrates directional electron transfer, as elucidated by combined experiments and theory. This study proposes a feasible strategy to regulate bidirectional electron flow via synergistic dual electric fields in heterojunctions, which opens a new avenue for designing high-performance bifunctional catalysts to tackle complex environmental issues.
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高影响因子
BIOMATERIALS
·
2026
·
IF 12.9
Zeguo Chen,Zhongshi Wu,Can Huang,Qiying Wu,Chao Xie,Sicheng Chen,Liang Yi,Haoyong Yuan,Sixi Liu,Abdulraheem Mustapha,Siyao Chen,Wansong Chen,Ting Lu,Zhenjie Tang,Yuhong Liu
Delayed endothelialization and inadequate matrix remodeling remain major obstacles in the development of small-diameter vascular grafts (SDVGs; <6 mm). To address these challenges, we developed an immunomodulatory tissue-engineered vascular graft (iTEVG) by integrating hollow mesoporous silica nanoparticles (HMSNs) with tailored mesopore sizes as delivery carriers for immunoregulatory factors. VEGF was selectively immobilized on the intimal surface, while the adventitia incorporated a sequential release system for VEGF and IL-4. VEGF exhibited rapid release (64.04 ± 4.44% in 7 days), promoting monocyte recruitment and adventitial neovascularization, while IL-4 showed sustained release (65.94 ± 2.06% over 28 days), driving long-term M2 macrophage polarization. In rats, iTEVGs achieved 88% endothelial coverage and smooth muscle cell infiltration within 1 month, full-thickness cellularization with a complete trilaminar structure by 3 months, and maintained mechanical integrity without aneurysm formation up to 6 months. This spatially partitioned platform, built on an acellular vascular scaffold, enables precise spatiotemporal regulation of the immune microenvironment and offers a design paradigm that synergistically promotes endothelialization and vascular matrix remodeling. The “intima-targeted regeneration and adventitia-sequential-release” strategy provides a promising template for SDVG design that may be extended to other complex organ constructs.
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PubMed
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Yuan Chen,Keqiang Hu,Yuancai Chen
In this study, we screened a new aerobic bacterium ( Bacillus megaterium Y-4) that can efficiently reduce Pd(II) with different electron donors. The best electron donor was sodium formate and the best reduction of Pd(II) were by log growth phase cells. The high removal capacity of Pd(II) (1658.3 mg/g) was obtained with 30 mg/L dry cell weight and 50 mg/L Pd (II) in the presence of 5 mM sodium formate. The removal amount of Pd(II) increased with initial Pd(II) concentrations ranging from 50 to 200 mg/L with 100 mg/L Pd(II) being completely removed by 148 mg/L dry cell weight in 6 h. The cell wall, periplasmic space and intracellular contents of B . megaterium Y-4 contains different kinds of enzymes for reducing Pd(II). In addition, the activity of extracellular and periplasmic enzymes was more sensitive to temperature than intracellular enzymes . XRD and XPS analysis revealed that the enzyme for reducing Pd(II) in B. megaterium Y-4 can tolerate a broad range of temperatures (20–60 °C) and pH (2.0–7.0) but was sensitive to oxygen. TEM analysis showed that biogenic palladium nanoparticles (Pd-NPs) were mainly distributed evenly in the periplasmic space of the live cells and were released from cells into aqueous solution, which reduced the toxicity of Pd(II), allowing Pd-NP recovery without cell destruction. B. megaterium Y-4 is a potential bacterium for efficient treatment and reclamation of Pd(II) pollution and formation of Pd-NPs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Yao Zhang,Leyu Zhan,Xiangyang Zhuang,Yunfeng Zhu,Neng Wan,Xinli Guo,Jian Chen,Zengmei Wang,Liquan Li
LiBH 4 possesses high ionic conductivity (σ) at a temperature over 373 K and wide window voltage over 5 V, but low σ value below 373 K. Li 2 NH owns excellent ionic conductivity at low temperature but performs in a narrow window voltage (only 0.7 V). xLiBH 4 -Li 2 NH composites (x = 1, 2, 4) were therefore synthesized to eliminate their respective drawbacks. By alternating current impedance spectra, we observed that xLiBH 4 -Li 2 NH (x = 1, 2, 4) composites offer σ of 10 −2 Scm −1 at a temperature over 373 K, and lift σ value by 100 times from that of LiBH 4 at a temperature below 373 K. According to the cyclic voltammetry (CV for 10 cycles) results, the window voltage of 3 V can be achieved for LiBH 4 -Li 2 NH (1:1). X-ray diffraction (XRD) and Fourier Transform infrared spectroscopy (FTIR) measurements on xLiBH 4 -Li 2 NH (x = 1, 2, 4) samples inform that original phases were well preserved after ball milling and temperature ramping. Their chemical stabilities were also demonstrated by differential scanning calorimetry (DSC) measurements. The enhanced lithium mobility at low temperature in LiBH 4 -Li 2 NH should be ascribed to the favorable boundaries between both phases according to the investigations by both in-situ nuclear magnetic resonance (NMR) and high-resolution transmission electron microscope (HRTEM). However, at a temperature above 373 K, the enhanced ionic mobility of LiBH 4 -Li 2 NH should be mainly contributed by HT-LiBH 4 phase.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 2
·1699-1705
·
IF 2.324
Teng Fei,Chen Dong,Ma Yuzhe,Ji Shaohua,Liu Jiaojiao,Wang Tianhua,Tang Jie,Cao Lifeng,Teng Bing
N,N -dimethylamino-4′-N′-methylstilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS)-graphene ex-situ and in-situ composite films with 2% concentration of graphene were first prepared and systematically investigated. The crystallinity of DSTMS-based composite films were confirmed by XRD analysis, and the functional groups of composite films can be obtained by FT-IR. Optical absorptions were recorded using UV–Vis-NIR spectral analysis, and the band gap and extinction coefficient of the films were calculated. The thermal stability of the composite films were analyzed by TG/DSC. The pressure sensitive resistance test showed that the pressure sensitive signal of the composite films were significantly increased after graphene added, while the signal of DSTMS film eventually disappears. This work expands the application of organic nonlinear crystal DSTMS in optics and electricity by doping graphene.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
非线性光学
·
纳米复合材料
·
电学性能
·
光学性能
·
热分析
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高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Yanchun Yang,Xiaojiao Kang,Lijian Huang,Song Wei,Daocheng Pan
Earth abundant Cu 2 ZnSn(S,Se) 4 (CZTSSe) has been considered as one of the most promising thin film solar cell absorber candidates. Here, we develop a facile water-based precursor solution approach for depositing high-efficiency Cu 2 ZnSn(S,Se) 4 thin film solar cells. In this environmentally friendly approach, inexpensive elemental Cu, Zn, Sn and S powders are used as the starting materials and are dissolved in the aqueous solution of thioglycolic acid and methylamine, forming a homogeneous precursor solution for depositing Cu 2 ZnSnS 4 nanocrystal thin film . As-deposited CZTS nanocrystal thin films are selenized to form the large-grain CZTSSe absorber layers . It was found that Na doping plays an important role in the formation of the extremely dense and flat CZTSSe absorber layer, and fill factor can be significantly improved for Na-doped CZTSSe solar cells, which lead to a photoelectric conversion efficiency of 6.96% with an open-circuit voltage of 378 mV, a short current density of 28.17 mA cm −2 , and a fill factor of 65.4%.
研究领域:
材料科学
·
新能源材料
·
半导体薄膜
·
光伏技术
·
无机功能材料
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2016
·Vol. 30
·期 8
·722-725
·
IF 2.452
Peipei Zou,Meisong Wang,Liang Zhao,Liyi Dai,Yuanyuan Wang
A Pt@three-dimensional graphene (Pt@3DG) composite hydrogel with a unique porous nanostructure was prepared and used as an efficient, recyclable and robust catalyst for the reduction of 4-nitrophenol to 4-aminophenol under mild conditions. The influence of graphene architecture on catalytic activities was comparatively investigated by loading the same amount of Pt on reduced graphene oxide. Pt@3DG exhibits a very high catalytic activity owing to the three-dimensional macroporous framework with high specific surface area, numerous activation sites and efficient transport pathways. Moreover, catalyst separation can be easily achieved by simple filtration, and the catalyst can be reused for at least five runs, maintaining its high catalytic activity. Copyright © 2016 John Wiley & Sons, Ltd.
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高影响因子
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