SYNTHETIC METALS
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2015
·
IF 2.252
Hua Ye,Baofeng Zhao,Dongyun Li,Dongcheng Chen,Gaozhan Xie,Shi-Jian Su,Wei Yang,Yong Cao
A series of blue-light-emitting conjugated polymers based on electron-donating trifluoren-2-ylamine and electron-deficient dibenzothiophene- S,S -dioxide were synthesized via typical Suzuki coupling reactions. Their thermal, photophysical and electrochemical properties were fully studied. Owing to the excellent thermal stability, film-forming ability as well as the favorable energy levels of the polymers, highly efficient non-doped single-layer blue devices by using these polymers as an emitting layer (EML) were achieved. Among them, the device based on PSFOFN1 showed the highest maximum current efficiency (CE max ) of 1.99 cd/A. Moreover, the device presented small efficiency roll-off with current efficiency (CE) of 1.97 cd/A at high brightness up to 100 cd/m 2 . In addition, the Commission Internationale de L’Eclairage (CIE) coordinates of all the devices are very close to the deep blue region. Our findings suggest the potential applications of the polymers in full-color flat-panel displays and organic lighting.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Xiang Long,Hongxiang Liu,Jing Hu,Shaogui Wu
Herein, we report a facile one-step solvothermal synthesis of nitrogen and sulfur co-doped fluorescent carbon dots (N,S-CDs) using benzoic acid as the carbon source and sulfonamide as the doping agent. The synthesized N,S-CDs exhibit stable photoluminescence with an impressive fluorescence quantum yield of 16.8 %. These N,S-CDs maintain their luminescent properties under various challenging conditions, including high salt concentrations, elevated temperatures, UV radiation exposure, acidic or alkaline environments, long-term storage, and different solvents. Notably, the photoluminescence of N,S-CDs is excitation-wavelength dependent, with emission wavelengths tunable from 470 nm to 585 nm. Furthermore, the N,S-CDs display distinct fluorescent hues in aqueous and ethanolic media, presenting a novel dual-switch anti-counterfeiting ink system. Leveraging the sensitivity of N,S-CDs to gentamicin, we have developed a facile and rapid detection method for this antibiotic, which has been successfully applied to the analysis of authentic milk samples. This research contributes a novel and efficient protocol for the fabrication of high-performance carbon dots, thereby expanding their potential applications in food analysis and anti-counterfeiting technologies.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yating Ai,Jiajie Hu,Xianqiang Xiong,Sónia A.C. Carabineiro,Yuesheng Li,Nikolay Sirotkin,Alexander Agafonov,Kangle Lv
Efficient interfacial charge transfer and robust interface interactions are crucial to achieve superior spatial separation of carriers and develop advanced heterogeneous photocatalysts . This study describes the synthesis of a novel S-scheme heterojunction of ZnO/In 2 S 3 , with S−O covalent bonds , achieved through a hydrothermal method . The optimized heterojunction shows exceptional photocatalytic activity , achieving a H 2 generation rate of 2488 μmol g −1 h −1 and a degradation efficiency of 86 % for tetracycline hydrochloride (TCH) within 2 h. These values surpass those of In 2 S 3 alone by 35 and 1.4 times, respectively. Various techniques, including electron spin resonance, X-ray photoelectron spectroscopy, Kelvin probe force microscopy and density functional theory calculations confirm the S-scheme heterojunction. The establishment of a chemical S−O bond between In 2 S 3 and ZnO facilitates an atomic level interfacial pathway, enabling efficient transportation of interfacial electrons.
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2015
·
IF 3.942
Li Yue,Guangci Li,Feng Zhang,Lei Chen,Xuebing Li,Xiang Huang
A series of CoMoO 4 hydrates composed of nanorods have been synthesized with different alcohol–water solvent systems, and the corresponding Co–Mo sulfides are obtained after sequential calcination and sulfurization. The characterization results show the change in solvent system can efficiently adjust the particle size of the Co–Mo precursors, while cannot affect their components and morphologies. Because of the different particle size, the specific surface areas (SSA) of the final Co–Mo sulfides are different. The particles with small size can lead to a high SSA that benefits the exposure and dispersion of active components, and further promote the incorporation of MoS 2 slabs with Co atoms to form “Co–Mo–S” structures on the surface of the sulfides. More “Co–Mo–S” structures would create more coordinative unsaturated sites with high activity in situ during hydrodesulfurization (HDS) reaction, resulting in a higher HDS activity. Among the Co–Mo sulfides, since S-m/w derived from methanol–water system possesses the smallest particle size and the most active sites, it naturally exhibits the highest HDS activity toward dibenzothiophene.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Shiyong Xu,Yijun Wang,Yue Wu,Mei Li
In order to explore the functional application of coal and realize the high-value application of low-quality coal. Therefore, low-cost coal as a carbon source into environmental protection, high-value coal-based carbon quantum dots (CQDs). This study employed high-sulfur coal as the carbon source and urea as the nitrogen source to successfully synthesize nitrogen and sulfur co-doped coal-based carbon quantum dots (NSCQDs) via a one-pot hydrothermal method. These NSCQDs were utilized as co-catalysts to assist the photocatalytic water splitting and hydrogen evolution of metal phosphides (Co-P and Fe-P). The obtained catalysts were subjected to systematic structural and property analyses, and the photocatalytic hydrogen evolution activity and stability were investigated, along with an analysis of the photocatalytic mechanism. The results revealed that the novel composite photocatalyst exhibited high hydrogen evolution activity, with a maximum hydrogen evolution rate of 28.41 mmol·g −1 ·h −1 at pH 10. Under a wavelength of 520 nm, the apparent quantum efficiency (AQE) reached 4.93%, and the solar-to-hydrogen (STH) conversion efficiency reached 0.46%. The semiconductor type (n-type) of the monophasic catalyst was determined through Mott-Schottky analysis, and the band structure was analyzed accordingly. The conduction and valence band positions for Co-P were determined to be -0.44 eV and 1.31 eV, respectively, while those for Fe-P were found to be -0.51 eV and 1.17 eV, respectively. Based on these results, it is inferred that an S-type heterojunction is formed between Co-P and Fe-P, and NSCQDs enhanced photocatalytic hydrogen evolution as an auxiliary catalyst. This research advances the synthesis of coal-based carbon quantum dots and provides the key information for the photocatalytic decomposition of water and hydrogen evolution using coal-based CQDs.
研究领域:
材料科学
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环境科学
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能源化学
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DOI
高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Chen Lizhu,Yu Yingjia,Duan Gengli,Wang Xin,Shen Baohua,Xiang Ping
Objective: Chiral analysis is a crucial method to differentiate selegiline intake from drug abuse. A dried urine spot (DUS) analytical method based on spotting urine samples (10 μL) onto dried spot collection cards, and followed by air-drying and extraction, was developed and validated for the determination of selegiline, desmethylselegiline, R/S-methamphetamine, and R/S-amphetamine.Methods: Methanol (0.5 mL) was found to be the ideal extraction solvent for target extraction from DUSs under orbital-horizontal stirring on a lateral shaker at 1,450 rpm for 30 min. Determinations were performed by direct electrospray ionization tandem mass spectrometry (ESI-MS/MS) under positive electrospray ionization conditions using multiple reaction monitoring mode. The chromatographic system consisted of a ChirobioticTM V2 column (2.1 × 250 mm, 5 μm) and a mobile phase of methanol containing 0.1% (v/v) glacial acetic acid and 0.02% (v/v) ammonium hydroxide.Results and conclusions: The calibration curves were linear from 50 to 5,000 ng/mL, with r > 0.995 for all analytes, imprecisions ≤ 15% and accuracies between −11.4 and 11.7%. Extraction recoveries ranged from 48.6 to 105.4% with coefficients of variation (CV) ≤ 13.7%, and matrix effects ranged from 45.4 to 104.1% with CV ≤ 10.3%. The lower limit of quantification was 50 ng/mL for each analyte. The present method is simple, rapid (accomplished in 12 min), sensitive, and validated by a pharmacokinetic study in human urine collected after a single oral administration of SG.
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Zongen Liu,Jiecheng Xiao,Xianwei Wu,Liqing Lin,Shaohuang Weng,Min Chen,Xiaohui Cai,Xinhua Lin
This work reports a facile and effective approach for preparing graphene quantum dots co-doped with nitrogen and sulfur (N-S/GQDs). The proposed method comprised pyrolysis of citric acid with glutathione and dialysis treatment. The fabricated N-S/GQDs exhibited blue luminescence and a high fluorescence quantum yield of 36.3%. N-S/GQDs can be sensitively quenched by Fe 3+ , which was absorbed on the edge of N-S/GQDs through the coordination interaction between Fe 3+ and N, S elements. The subsequent introduction of pyrophosphate ion (PPi) resulted in the recovery of the fluorescence of Fe 3+ -quenched N-S/GQDs. The stronger coordination reactivity between Fe 3+ and PPi induced changes in fluorescence. PPi concentration was facilely quantified through the recovered amplitudes of the fluorescence intensities of N-S/GQDs. Under the optimized experimental condition, increased fluorescence intensity showed a linear relationship to PPi concentration (1 μM to 1000 μM) in serum samples. Additionally, the proposed method featured sensitive and selectivity for the detection of PPi in synovial fluid, suggesting the potential application for simple and accurate clinical diagnosis of arthritic diseases.
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LANGMUIR
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2025
·
IF 3.9
Daqiang Liu,Xingliang Yin,Leilei Li,Chuanwu Chen,Qiu-Xia Lin,Hong-Xin Zhang,Erkang Liu,Jun-Feng Wang
Ammonia is in high demand and widely used, yet its production still predominantly relies on the energy-intensive Haber–Bosch process, highlighting the urgent need for a milder alternative technology. Photocatalytic N2 fixation shows great promise in this regard despite the challenge of developing high-efficiency catalysts. In this study, we successfully prepared micronano spherical Bi2MoO6/Bi2MoO6–x S-Scheme homojunctions using a simple solvothermal-calcination coupling method, which offer unique advantages for nitrogen fixation catalysis: (i) the micronano structure mitigates the agglomeration issue common in nanomaterials, thereby exposing more active sites; (ii) the in situ constructed S-Scheme homojunction features a high-quality surface and interface structure, enhancing the spatial separation and transport of photogenerated charges and preserving strong redox capabilities; and (iii) the oxygen-rich vacancy structure promotes the N2 adsorption and activation. Thanks to those favorable properties, the Bi2MoO6/Bi2MoO6–x (BMO/BMOOV) S-Scheme homojunction demonstrates exceptional ammonia production efficiency, with a NH4+ generation rate of 238.7 μmol g–1 h–1 under simulated sunlight, which is over 5.2 times higher than that of pristine Bi2MoO6 (BMO) and significantly outperforms other reported similar catalytic systems (see Table S1). This work introduces a simple and versatile method for synthesizing homojunctions, potentially inspiring the development of more efficient photocatalysts for nitrogen fixation and beyond.
研究领域:
光催化
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材料科学
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环境化学
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可再生能源
·
固氮
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DOI
PubMed
高影响因子
JOURNAL OF LIPID RESEARCH
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2025
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IF 4.1
Shaojun Pei,Wen Wang,Tingze Feng,Qiuping Wang,Yuhan Wang,Hong-Xu Liu,Xinmiao Liang,Hai-long Piao
S -palmitoylation is a dynamic and reversible post-translational modification that plays crucial roles in cancer progression. Here, we found the oncogene of metadherin (MTDH) modulates lipid metabolism and ferroptosis by its S -palmitoylation. We demonstrate that MTDH is S -palmitoylated at Cys-75 in the endoplasmic reticulum by ZDHHC1/9 and S -depalmitoylated by APT1. The flexible loop and the α-helix length in the MTDH N-terminus affect its S -palmitoylation level. In addition, metabolomics analysis found that the S -palmitoylated MTDH increases intracellular levels of triglycerides, phosphatidylethanolamines, and phosphatidylcholines. However, the non- S -palmitoylation form of MTDH-CS enhanced the interaction of between MTDH and the ferroptosis enhancer of Acyl-CoA synthetase long-chain family member 4 (ACSL4), thereby reducing ferroptosis sensitivity in breast cancer cell. Taken together, targeting MTDH S -palmitoylation may represent a novel strategy for breast cancer therapy.
研究领域:
癌症生物学
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分子生物学
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细胞生物学
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脂质代谢
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翻译后修饰
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PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
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IF 4.1
Heng-xue Zhou,Yi Long,Qiu-fang Zhong,Jia-liang Wang,Bo Liang,Ying-bang Yao,Daniel Q. Tan,Sheng-guo Lu,Tao Tao
A novel V 2 O 3 @C/S composite cathode material is prepared via a combined strategy consisting of solution synthesis, hydrothermal treatment and high-temperature carbonization, and all solid-state lithium‑sulfur (Li S) batteries with high-performance are constructed. The obtained V 2 O 3 @C host material demonstrates excellent properties, including good structural stability, superior electrical conductivity, strong interfacial compatibility, notable sulfur adsorption and high catalytic capabilities. At a current rate of 0.1C, the V 2 O 3 @C/S cathode delivers an initial capacity of 1125 mAh g −1 with a capacity retention of 67.1 % after 150 cycles in solid-state cells at the room temperature. At 0.5C, the capacity retention still remains 45.5 % after 250 cycles. Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel analysis further demonstrate the enhanced reaction kinetics and reduced charge-transfer resistance. This work provides a promising strategy for designing the high-performance cathode materials of solid-state Li S batteries.
研究领域:
材料科学
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储能
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电化学
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纳米材料
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电池技术
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高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Xiao Song,Rui Xiong,Runqian Yang,Yining Jiang,Qian Chen,Liping Ruan
Biomass carbon materials have good application prospects in the field of electromagnetic wave absorption and shielding because of their environmental protection and low cost, but not good absorption of low-frequency S-band. In this article, the microwave activation of different mass ratios of zinc chloride and peach pit carbon is studied to improve the low-frequency wave absorption performance. It is found that with the addition of zinc chloride, the electromagnetic absorption performance of peach pit carbon in S-band is significantly improved after microwave activation. The sample with a mass ratio of zinc chloride to peach pit carbon of 3:1 has the best performance. Its minimum reflection loss (RL) is −14.13 dB (4.60 mm, 3.92 GHz), and the maximum effective absorption bandwidth is 1.24 GHz (2.10–3.34 GHz, 5.80 mm). The results of scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and other tests show that the absorption properties of S-band are closely related to the ZnO and basic zinc chloride components generated by microwave activation. In this study, the absorption of carbon material in S-band is achieved by simple microwave activation without the addition of magnetic materials, which can provide a new way for the low-frequency absorption enhancement of materials.
研究领域:
材料科学
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电磁学
·
环境功能材料
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纳米碳材料
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能源与环境技术
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高影响因子
Polymer Chemistry
·
2017
·Vol. 8
·期 21
·3261-3270
·
IF 5.375
Jun Zhang,Yan Xiao,Xueli Luo,Lianlei Wen,Andreas Heise,Meidong Lang
Double hydrophilic block copolymers (DHBCs) based on poly(ε-caprolactone)s, poly(6-acetoxyl-ε-caprolactone)-b-poly(4-N-piperilactone) (PCCL-b-PPIL), were synthesized via ring-opening polymerization and deprotection. The self-assembly behaviour of these block copolymers in aqueous solutions was thoroughly explored via a combination of UV-vis spectroscopy, zeta potential measurement, 1H NMR spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM). It was observed that “schizophrenic” aggregations were formed and triggered by pH, i.e., the copolymers could self-assemble into PCCL-core micelles at acidic pH and PPIL-core micelles at alkaline pH. In addition, pendant groups in each block of copolymers facilitated further chemical modification with fluorescent dyes such as 1-(hydroxymethyl)pyrene and FITC. The fluorescence properties of pyrene-functionalized copolymers were closely related to their aggregate morphology, which could be adjusted simply by altering the environmental pH values. Meanwhile, it is expected that this novel type of degradable schizophrenic block copolymer holds potential application in stimuli-responsive fluorescent probes.
研究领域:
高分子化学
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纳米医学
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生物材料
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药物递送
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分子影像
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刺激响应系统
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DOI
高影响因子
危险品化学品经营许可证（带存储）