JOURNAL OF ALLOYS AND COMPOUNDS
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2017
·
IF 3.133
Jun Wu,Ji Hu,Kaixin Song,Junming Xu,Huifang Gao
Spirulina was used for the first time as a raw nitrogen-doped porous carbon source to synthesize carbon/sulphur (carbon/S) composite cathodes for lithium-sulphur batteries. The composites consisting of sulphur and spirulina-derived carbon with micro- and meso-pores showed an obvious carbon encapsulating sulphur structure. The carbon/S cathodes exhibited much better electrochemical performance than pristine sulphur, delivering an initial discharge capacity of 662 mAh g −1 with nearly 60% capacity retention after 100 cycles at 1 C current density (1670 mA g −1 ). The improved electrochemical stability of the composites can be ascribed to the synergistic effects between the encapsulation of sulphur by spirulina-derived carbon and adsorption of polysulfides on N doped carbon lattice. These effects successfully prevented or retarded the shuttle effect of sulphur cathodes.
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高影响因子
FUEL
·
2025
·
IF 7.5
Lina Dai,Qiang Li,Xianglan Dong,Enqi Zhang,Yufeng Hu,Xin Guo,Yanduo Liu
Photocatalysis exhibits great potential for applications in solving energy and environmental problems, and has received widespread attention. This article constructs a new type of Mn-Fe Prussian blue analogues S-scheme mechanism photocatalytic material. The material is composed of oxidized photocatalysts (Ag 2 MoO 4 ) and reduced photocatalysts (Mn-Fe PBAs). The composite photocatalyst constructed in this way shows advantages such as a wide spectral response range, high charge carrier separation efficiency, and strong oxidation–reduction ability, which can significantly enhance photocatalytic efficiency. By studying the construction method and CO 2 reduction performance of the photocatalyst, the structure-performance relationship can be clarified. The CO production rate is 43.3 μmol/g/h, and the selectivity can reach 94.9 %, which is far superior to the current mainstream photocatalytic system. The electron transfer kinetics and S-scheme charge separation mechanism between the Mn-Fe PBAs and Ag 2 MoO 4 interfaces are explained by steady-state surface photovoltage spectroscopy (SS-SPS) and near ambient pressure XPS (NAP-XPS). In-situ DRIFTS techniques are used to monitor the changes of transition intermediates, and combined with theoretical calculations, the activation mechanism of CO 2 by the Mn-Fe catalytic site is deeply revealed at the atomic level. This study provides new theoretical guidance and profound insights for the construction of Prussian blue analogues photocatalysts.
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高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Jiayi Wang,Penggang Ren,Ying Zhang,Zihang Cai,Zhengyan Chen,Yanling Jin,Zhengzheng Guo
BiOI is a promising photocatalyst due to its exceptional visible light response and high absorption coefficient; however, its performance is hindered by the rapid recombination of electron-hole (e − -h + ) pairs. Herein, a 2D/3D BiOI/g-C 3 N 4 S-scheme heterojunction catalyst was designed and constructed through the alkali etching strategy and subsequent microwave-assisted hydrothermal strategy. The abundant surface active sites and matched band gap of g-C 3 N 4 prepared through alkali etching facilitates anchoring of BiOI nanosheets, contact with contaminants and construction of heterojunctions. 2D/3D S-scheme heterojunction substantially promote electron-hole (e − -h + ) pairs separation and transfer. Profited from their synergistic effects, the 2D/3D BiOI/g-C 3 N 4 heterojunction delivers superior photocatalytic activity toward four different types of pollutants: methylene blue (91.7 %), tetracycline (91.9 %), eosin y (90.9 %) and methyl orange (97.7 %), and demonstrates excellent cyclic stability after seven methylene blue cyclic degradation experiments. Furthermore, BiOI/g-C 3 N 4 has shown satisfactory practicability in many simulation experiments, such as coexisting cations, different pH and real water. A feasible strategy to prepare a visible-light-driven multidimensional coordinated S-scheme heterojunction photocatalyst is provided in this work.
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高影响因子
FUEL
·
2025
·
IF 7.5
Shiqing Zhang,Shaokai Ma,Zihao Wang,Zihang Cao,Fang Liu,Ying Li,Xuewen Xu,Yuanhui Ma,Yanming Xue,Chengchun Tang,Jun Zhang
The development of cost-effective, highly efficient, and stable electrocatalysts for the acidic hydrogen evolution reaction (HER) is essential for advancing clean and renewable hydrogen energy technologies. This is particularly critical for proton exchange membrane (PEM) electrolyzers powered by renewable energy sources. Among various candidates, cobalt-based phosphide (CoP) has emerged as a promising catalyst for the HER in acidic media, owing to the synergistic interaction between Co and P, as well as its inherent stability. Despite significant efforts to enhance its catalytic activity, the critical issue of stability has often been overlooked. Herein, sulfur (S), which has a higher electronegativity than P, is selectively incorporated into CoP nanowire arrays through a simple vulcanization method. This strategy aims to enhance stability without altering catalytic activity. The optimized S-CoP/CC electrocatalyst shows an overpotential of 96 mV at 10 mA cm −2 in acid electrolyte, showing a slight improvement over the initial CoP/CC (114 mV). Remarkably, it shows exceptional durability, maintaining excellent stability over 150 h of testing in acid solution. The incorporation of sulfur serves a dual role: it enhances electronic conductivity and increases the electrochemical surface area, thereby improving catalytic activity, while simultaneously strengthening the CoP bond energy, leading to outstanding acid stability. Furthermore, when employed as the cathode in a PEM electrolyzer, S-CoP/CC achieves a current density of 500 mA cm −2 at 1.70 V, demonstrating excellent stability over 140 h at 60 °C. Our findings present a new approach for enhancing both the stability and activity of acidic HER by incorporating higher-electronegativity anions into the CoP lattice. This strategy is applicable not only to Co-based phosphides but also to other non-precious metal-based transition metal compounds, paving the way for the development of high-performance PEM electrolyzers.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianshuai Mu,Aizhu Peng,Xinran Wang,Jin Wang,Zengjiao Hong,Danna Guo,Shulai Lei,Jiajun Wang,En-Cui Yang
Designing low-cost and environmentally friendly oxygen evolution reaction (OER) electrocatalysts to enhance the electrocatalytic water decomposition to produce hydrogen still faces great challenges. In this work, a feasible strategy for metallic/nonmetallic elements co-doping to boost the OER catalytic properties of iron oxyhydroxide is proposed. A series of S and Cr co-doped iron oxyhydroxides nanoarrays loaded on nickel foam (Sx,Cr-FeOOH/NF) were prepared by an electrodeposition–hydrothermal method. The optimized S0.1,Cr-FeOOH/NF exhibits a superior electrocatalytic OER performance with low overpotential (235 mV at 100 mA cm–2), highly outperforming commercial RuO2. Meanwhile, the overpotential of S0.1,Cr-FeOOH/NF increases by only 4 mV after 70 h of stability testing at 100 mA cm–2, demonstrating its durability. The nanoarray with ultrathin nanosheets of S0.1,Cr-FeOOH/NF regulated by S and Cr co-doping can offer abundant active sites and also facilitate mass transportation. The density functional theory (DFT) calculation results show that S and Cr co-doping modifies the electronic structure of S0.1,Cr-FeOOH/NF, which thus optimizes the adsorption energy toward the OER intermediates, promotes the transformation of *O to *OOH (rate-determining step), and thus accelerates the OER kinetics.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-13
·
IF 5.3
Cao Xiaodong,Zhang Chenlu,Xu Yunan,Wang Wei,Hu Huiying,Chen Keji,Yang Jing,He Shudong,Sun Hanju,Ye Yongkang
An electrochemical biosensor using gold nanoparticles (AuNPs)-doped bimetallic-organic framework (BMOF) with enhanced peroxidase-like activity was constructed to detect Salmonella Typhimurium ( S. typhimurium ). The BMOF of CuZr-MOF was synthesized via a two-step method and used as carrier to in situ immobilize AuNPs. Due to the stability of Zr-MOF, the good electrocatalytic ability of Cu (II), and the synergetic effects of AuNPs, Cu (II) and Zr (IV), the prepared AuNPs@CuZr-MOF nanozyme showed improved stability and catalytic activity to H 2 O 2 oxidation. The oxidation reaction was found to be a surface-controlled process of electron transfer and a pH-dependent electron transfer process of oxidation reaction involving two electrons. Further, AuNPs@CuZr-MOF was biofunctionalized with signal DNA probe, forming sDNA-AuNPs@CuZr-MOF nanotags. The biosensing platform was constructed on a glassy carbon electrode modified sequentially with electrodeposited AuNPs, capture DNA probe (cDNA), and BSA. Finally, a sandwich-type detection structure was formed by hybridization reactions between cDNA and target invA gene of S. typhimurium , as well as between invA gene and the sDNA of sDNA@AuNPs@CuZr-MOF nanotags. Under optimized experimental conditions, the biosensor achieved a linear range of 1 × 10 −16 to 1 × 10 −8 mol L −1 for the target invA gene with a detection limit (LOD) of 6.2 × 10 −17 mol L −1 using differential pulse voltammetry measurement (DPV). It was successfully applied to the direct and quantitative detection of invA gene segments in total DNA extracts of S. typhimurium , showing a linear range from 3.5 to 3.5 × 10 6 CFU mL −1 and a LOD of 0.82 CFU mL −1 . The fabricated biosensor exhibited good selectivity, reproducibility, and storage stability, enabling its use for the detection of invA gene segments in contaminated milk, with recoveries between 95.9% and 103.1%. Graphical
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高影响因子
FOOD CONTROL
·
2025
·
IF 6.3
Zhifeng Cai,Tianyu Miao,Guiyu Meng,Yanan Li
N,S-doped carbon dots (N,S-CDs) were fabricated by utilizing m-phenylenediamine and β-mercaptoethylamine as precursors and designed as colorimetric/fluorometric dual-mode nanosensors. The curcumin (CUR) could quench the green fluorescence around 509 nm. The mechanism of fluorescence quenching was mainly attributed to the static quenching effect. Meanwhile, the color alterations of sensing solution were acquired with CUR contents changing from 0 to 50 μM. Thereby, the quantitative measurement of CUR could be materialized based on colorimetric and fluorometric dual-mode sensing methods. The wide linearity and low detection limit (LOD) were achieved through this dual-mode nanosensor. The feasibility of this system was continuously confirmed via the assay of CUR in fruit samples. Moreover, a portable smartphone-assisted detection system based on N, S-CDs suggested a facile, inexpensive, and efficient approach for detecting CUR in actual fruit samples.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xin Chen,Yingjie Wan,Xiaobao Hou,Baofeng Wang,Fuqiang Huang
A green and sustainable strategy was proposed to efficiently convert polyvinyl chloride (PVC) waste into high-value porous carbon adsorbents for simultaneous waste plastic resourcing and heavy metal pollution control. The synthesis integrates solvothermal pretreatment with dimethylformamide (DMF), followed by KOH activation and heteroatom doping using thiourea as the N/S source. Solvothermal pretreatment increases carbon yield to 40 wt%. NS-PVC has a hierarchical pore structure with a high specific surface area of 1096.53 m2 g−1, moderate pore size distribution, and rich oxygen-containing, sulfur-containing, and nitrogen-containing functional groups, and comparative experiments confirmed that the doped N and S heteroatoms had a synergistic effect and promoted the adsorption performance, demonstrating exceptional removal efficiency (96%) for the high-concentration Pb(II) solution (1500 mg L−1), with a maximum adsorption capacity of 149.2 mg g−1. Through adsorption kinetics and isotherm studies, it was confirmed that the adsorption process of Pb(II) on NS-PVC was endothermic and consistent with the pseudo-second-order kinetic model and Langmuir models. By comparing the physicochemical properties of NS-PVC before and after the adsorption of Pb(II), it was confirmed that the adsorption of Pb(II) on NS-PVC was controlled by a combination of chemisorption and physisorption, including ion exchange, surface complexation, pore filling and electrostatic attraction.
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高影响因子
RSC Sustainability
·
2025
·
IF 4.9
Qianmeng Zhao,Shaifei Liu,Wen Liu,Mengqian Fu,Zhenyang Xu,Qian Su,Weiguo Cheng
Preparation of cyclic carbonates from CO2 and epoxides via cycloaddition is a well-established synthetic route, which is not only economical but also in line with the atomic economy. To overcome the problem of the cluster formation of hydrogen-bond donors in functionalized poly(ionic liquid)s, which reduces their catalytic activity, a series of spacer-functionalized poly(ionic liquid) catalysts were developed. In poly(ionic) liquids, the hydrogen-donating effect enhances the intrinsic catalytic performance of the active sites and the long-chain alkyl groups prevent interactions between hydrogen-bond-donor groups, thus increasing the utilization of the active sites. Among the developed poly(ionic liquid) catalysts, the poly(ionic liquid) P[AC12VIM][Br] containing amino groups demonstrated the highest catalytic activity (propylene oxide conversion up to 99%), which was comparable with that of bulky ILs. The best catalytic performance of P[AC12VIM][Br] was attributed owing to its multiple functions in not only activating CO2 and epoxides but also stabilizing Br−. Furthermore, the amphiphilicity of amino-functionalized poly(ionic liquid)s boosted their catalytic suitability for epoxide substrates with lipophilic edge groups, which was better than that of conventional poly(ionic liquid)s. Through XPS and NMR analyses, a mechanism of operation is proposed in which imidazole and hydrogen donor groups act co-operatively in epoxy during the reaction to assist in ring-opening. Thus, this study provides a new approach for improving the catalytic performance of poly(ionic liquid) catalysts from the viewpoint of an intrinsic reaction and utilization of the active sites.
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高影响因子
Water
·
2025
·Vol. 17
·期 21
·3100
·
IF 3
Bingyang Wang,Xiaochen Wang,Shuang Liu,Zheng Wang,Fan Bai,Yujie Cheng,Dingkun Lu,Pengchao Xie
In this study, insoluble CaSO3was applied to replace soluble sulfite/bisulfite salt in the Fe(II)-activated sulfite/bisulfite [S(IV)] process for the efficient 2,4,6-tribromophenol (TBP) degradation. CaSO3serves as a low-cost and slow-release source of S(IV), significantly improving S(IV) utilization compared to conventional soluble Na2SO3. The Fe(II)/CaSO3system generated SO4•−and HO•through Fe(II)/Fe(III) redox cycling. Mechanistic studies confirmed SO4•−as the dominant reactive species, selectively attacking C-Br bonds and hydroxyl groups in TBP. Process optimization revealed effective performance under acidic conditions (pH 3.5–4.0) with minimal inhibition by common anions (Cl−, HCO3−). The reactive sites of TBP were identified through Fukui function calculations, and the degradation pathway was elucidated based on LC-MS analysis. Toxicity evaluation indicated reduced ecological risk of degradation intermediates due to debromination and benzene ring cleavage. This work provides a sustainable strategy for efficient TBP removal and detoxification in wastewater treatment with benefiting S(IV) utilization.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yao Guo,Xianchang Li,Min Jian,Shiding Zhang,Jianxin Li,Yue Li,Yinghui Xue,Yuhua Wang,Qing Shen
The interface between the MAPbI3 perovskite and layered ZnIn2S4 was investigated by first-principles calculations combined with the experimental study. To begin with, four different types of interfacial configurations were established and carefully examined. The interaction occurring between MAPbI3 and ZnIn2X4 is mainly determined by weak van der Waals forces. The interfacial charge reorganization implies electron transfer from the MAPbI3 layer to the ZnIn2X4 layer across the interface. The PbI/ZnIn2X4 interface exhibits stronger interfacial interactions compared to those of the MAI/ZnIn2X4 counterpart. The interfacial adhesion work was found to depend more on the surface termination of MAPbI3 than on that of ZnIn2X4. Conversely, it was discovered that the interface potential drop, work function, and dielectric function within the MAPbI3/ZnIn2X4 interfaces are predominantly regulated by ZnIn2X4 termination rather than MAPbI3 termination. Chalcogen vacancies cause enhanced interfacial interactions owing to electron rearrangements at the interfaces. In the end, the MAPbI3/ZnIn2S4 heterostructure was successfully fabricated and then characterized, which effectively verified first-principles calculations. This study offers fundamental insights into the development of MAPbI3/ZnIn2X4 heterostructures, advancing perovskite-based optoelectronic devices.
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Han-Chen Zeng,Peng-Fei Qiu,Zhuo Huang,Xiu-Niang Tan,Zai-Yin Huang,Yan Zhou
The poor electrical conductivity and pronounced structural instability of NiCo Layered Double Hydroxide are of major challenge in energy storage. Herein, three distinct morphological types of S doped nickel cobalt layered double hydroxides, S-LDH-x/NF (x = Ⅰ, Ⅱ and Ⅲ) electrodes are successfully prepared from thiol-functionalized conductive metal organic frameworks NiCo-MOF-x/NF (x = Ⅰ, Ⅱ, Ⅲ) precursors through the synergistic method of in situ interfacial synthesis via coordinated growth and etching. Among them, S-LDH-Ⅱ/NF with nanoflower morphology shows excellent electrochemical performances with high conductivity and remarkable cycling stability, and the surface capacitance is 2617 mF/cm 2 (1 mA/cm 2 ). What's more, the S-LDH-Ⅱ//AC ASC affords a density of energy of 99 Wh/kg (0.182 mWh/cm 2 ) at 415 W/kg (0.76 mW/cm 2 ). In addition, after 10,000 cycling cycles, the S-LDH-Ⅱ//AC ASC still maintains 74 % capacitance retention, indicating its exceptional cycling performance. This paper offers a new approach for designing novel energy storage materials based on thiol-functionalized bimetallic conductive metal organic framework templates through synergistic synthesis method and morphology engineering strategy.
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