CRYSTENGCOMM
·
2025
·
IF 2.6
Yinkun Liao,Yibo Hu,Yuanhao Zhou,Jingkun Chen,Xue Yang,Meng Gu,Kuan Ren,Jingtai Zhao,Qianli Li,He Feng
Copper halide scintillation materials with self-trapped exciton (STE) photoluminescence have attracted great interest in the field of optoelectronics. However, it is challenging for Cs3Cu2Br5 materials to achieve wider spectral emission and high spatial resolution X-ray imaging in applications. Herein, combining XRD and energy dispersive spectroscopy results, it is proved that Ag+ is doped into the Cs3Cu2Br5 lattice through an ion doping process, and PL is regulated from 460 nm to 543 nm. By density functional theory calculation, the band gap is reduced from 2.25 eV of Cs3Cu2Br5 to 1.99 eV of Cs3Cu2Br5:Ag, which is also consistent with the spectral redshift. The gradient study of the silver ion concentration from 5% to 35% shows that the best silver ion concentration is 25%. The experimental results show that the doped silver ions can improve the PL, PLE, PLQY, XEL and other properties of the material, such as the PLQY which increased from 27.38% to 90.62%. At the same time, Cs3Cu2Br5:Ag also has good stability, it can be stored in air for 30 days, and its PL intensity remains at 90.73%. The X-ray space of the Cs3Cu2Br5:Ag-UV scintillation film measured in a laboratory imaging system can reach 18.3 lp mm−1.
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高影响因子
Nanoscale
·
2025
·Vol. 17
·期 35
·20465-20475
·
IF 5.1
Weiyi Li,Min Zhang,Shen Cai,Yan Xin,Huajun Tian
Alluaudite-type Na2+2xFe2−x(SO4)3 has been a promising cathode material for sodium-ion batteries (SIBs) due to its high operating voltage and stable structure. However, its actual electrochemical performance suffers from intrinsic sluggish kinetics and poor electronic conductivity. In this work, for the first time, we propose a Na2.48(Fe0.89Mg0.03Sn0.04)1.76(SO4)3 cathode material prepared via a Mg/Sn co-doping strategy. Inactive Mg2+ stabilizes the structure, while Sn4+ inhibits the decomposition of electrolytes under high voltage. The Mg/Sn co-doping strategy enhances the kinetics of sodium ion diffusion reactions, leading to improved electrochemical properties, especially at low temperatures. The optimal NFMS/C-Sn0.03 cathode exhibits a long-term capacity retention of 91.6% after 1500 cycles at 5C and outstanding reversible capacities of 74.3 and 58.3 mAh g−1 at 10C and even at 50C, respectively. Furthermore, the NFMS/C-Sn0.03 cathode demonstrates a high capacity retention of 95.5% at −5 °C and 88.4% at −15 °C, with a remarkable capacity retention of 93.9% after 1000 cycles at room temperature and 85.5% after 700 cycles at −15 °C, respectively. Electron paramagnetic resonance (EPR) and atomic force microscopy (AFM) techniques confirmed that the presence of unpaired electrons and enhanced electronic conductivity could be attributed to the Mg/Sn co-doping. This work provides a feasible approach for designing low-cost, durable, low-temperature, and high-performance cathode materials for SIBs.
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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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高影响因子
Sustainability
·
2025
·Vol. 17
·期 22
·
IF 3.3
Jingfei Luan,Zhe Li,Ye Yao,Jian Wang,Liang Hao
This study presented the successful synthesis of a visible light responsive Z-scheme BiTmDySbO7/BiEuO3heterojunction photocatalyst (BBHP) via the hydrothermal method, exhibiting outstanding removal efficiency for degrading the metronidazole (MNZ) in wastewater. The BBHP exhibited exceptional photocatalytic activity during the degradation process of the MNZ which was a widely detected pharmaceutical pollutant in aquatic environments. The key to the high photocatalytic activity of the BBHP was the formation of a Z-scheme photogenerated carrier transport channel which existed between BiTmDySbO7and BiEuO3within the heterojunction structure. This innovative structural design was experimentally confirmed for enhancing the separation efficiency of the photogenerated charge carriers significantly, thereby, the efficient photocatalytic activity of the BBHP was promoted. After visible light irradiation for 130 min, the BBHP achieved a removal efficiency of 99.56% for degrading MNZ and a mineralization rate of 98.11% for removing the total organic carbon (TOC) concentration. In contrast to a single photocatalyst, the removal rate of the MNZ by using the BBHP was 1.14 times that by using the BiEuO3, 1.26 times that by using the BiTmDySbO7, and 2.65 times that by using the nitrogen-doped TiO2(N-T) under visible light irradiation. The mineralization rate for removing the TOC concentration during the degradation process of the MNZ by using the BBHP was 1.17 times that by using the BiEuO3, 1.29 times that by using the BiTmDySbO7, and 2.86 times that by using the N-T under visible light irradiation. The photocatalytic degradation process of the MNZ by using the BBHP followed first-order kinetics model, concurrently, a dynamics rate constant of 0.0345 min−1was obtained. Furthermore, the BBHP demonstrated excellent stability and durability in accordance with multiple cyclic degradation experiments. According to the capturing radicals experiments and the electron paramagnetic resonance test experiments, it was determined that the hydroxyl radicals (•OH) and the superoxide anions (•O2−) played key role during the photocatalytic degradation process of the MNZ by using the BBHP under visible light irradiation. Finally, the intermediate products that were produced during the degradation process of the MNZ were analyzed by using liquid chromatography-mass spectrometer, as a result, a potential degradation pathway for the MNZ was proposed. Overall, this study could provide valuable references for future research on composite photocatalysts and effectively maintain the safety and sustainable utilization of water resource.
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高影响因子
Fundamental Research
·
2025
·
IF 6.3
Zhong Wang,Tuo Zang,Ye Ziyu,Siyuan Zhang,Guojian Li,Xiaoming Liu,Qiang Wang,Shuang Yuan
Precise anchoring and high-density utilization of platinum single atoms (Pt SA ) remain critical challenges in advancing efficient hydrogen production via water electrolysis. Here, we present an innovative magnetic-field-assisted electrodeposition strategy for the controllable synthesis of high-density Pt SA on two-dimensional MXene substrates. Application of a 0.6 T magnetic field significantly enhanced Pt SA deposition kinetics, yielding a 2.1-fold increase in the deposition rate. Numerical simulations confirmed that magnetohydrodynamic (MHD) effects induced by the magnetic field were the primary mechanism driving this enhanced deposition efficiency. The optimized Pt SA -0.6@MXene/NF catalyst exhibited outstanding hydrogen evolution reaction (HER) performance in 1 M KOH, achieving an ultralow overpotential of 12 mV at 10 mA cm −2 , along with a Tafel slope of 29 mV dec −1 . Notably, the catalyst demonstrated 66.1-fold higher Pt mass activity (3458.7 A g −1 ) compared to commercial Pt/C (52.3 A g −1 ) at a 50 mV overpotential. Density functional theory (DFT) calculations revealed that the high-density Pt SA configuration synergistically enhances MXene's electrical conductivity while lowering the d-band center, thereby optimizing the energy barrier for hydrogen intermediate (H*) adsorption. This work provides a novel strategy for regulating the magnetic-field-assisted deposition of Pt SA catalysts, offering a new avenue for designing high-performance water electrolysis catalysts.
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高影响因子
Small
·
2025
·Vol. 21
·期 19
·2500271
·
IF 12.1
Weiyi Li,Bijiao He,Fang Zhang,Yan Xin,Shen Cai,Huajun Tian
Na 2+2x Fe 2–x (SO 4 ) 3 (NFSO) is a promising cathode material for sodium-ion batteries (SIBs) due to its low cost and high operating potential (≈3.8 V). However, poor intrinsic electronic conductivity and sluggish kinetics are major drawbacks to its practical application. Herein, magnesium doped Na 2+2x Fe 2–x (SO 4 ) 3 microspheres (Na 2.54 (Fe 0.97 Mg 0.03 ) 1.73 (SO 4 ) 3 ) are synthesized via a designed spray-drying process. The optimized cathode material (NFSO@C-Mg0.02) possesses excellent rate performance up to 50C (50.8 mAh g −1 at 50C) and long-cycle stability (capacity retention of 78.3% even after 9000 cycles at 10C). Despite an increase in the mass loading to 10 mg cm −2 , the electrode continues to represent a reversible capacity of 72.1 mAh g −1 at 3C. Furthermore, NFSO@C-Mg0.02║HC full cell demonstrates superior cycling stability (80% capacity retention over 8000 cycles at 5C) and high energy density (≈310 Wh kg −1 , based on the cathode). In situ X-ray diffraction (XRD) results reveal that the Mg doping strategy successfully mitigates the variation in lattice volume. The density functional theory (DFT) calculations verify that the prominent rate performance is attributed to the enhanced Na + diffusion kinetics and low ionic-migration energy barrier. This work provides an effective strategy and a fundamental understanding to enhance the electrochemical performance of cathode materials for SIBs.
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高影响因子
Carbon Neutralization
·
2025
·Vol. 4
·期 6
·e70069
·
IF 12
Lisha Liu,Mingyuan Gao,Mengwei Guo,Rongrong Deng,Cunying Xu,Yan Li,Juanjian Ru,Yixin Hua,Qibo Zhang
The development of layered double hydroxides (LDHs) has been hindered by the mismatch between their rate capability and areal capacity at ultrahigh mass loadings. Herein, we address this issue by designing NiCo-LDH/NiCoOOH composite films with an open-pore nanosheet structure. These films are fabricated using a ChCl-urea based deep eutectic solvent (DES) additive-assisted electrodeposition method followed by electrochemical activation, and confined on each graphene nanolayer of a 2D hierarchical expanded graphene paper (EGP) substrate. This design facilitates rapid charge transport and ion diffusion, enhancing active material utilization. The DES additive induces lower crystallinity and more disordered lattices with vacancies in the composite films, strengthening the synergistic effect with the EGP interface. Consequently, the films achieve high areal capacities of 3.4 mAh cm −2 at 23 mg cm −2 mass loading (84.1% rate capability) and a record 16.6 mAh cm −2 at ultrahigh 100 mg cm −2 mass loading (58.4% rate capability, GP thickness 0.15 mm). We also elucidate the relationship between GP substrate thickness and electrochemical performance. The resulting asymmetric supercapacitor delivers an ultrahigh energy density of 6.4 mWh cm −2 and power density of 64 mW cm −2 . This study provides new insights into constructing high-mass-loading energy storage materials through microstructure regulation and interface engineering for practical applications.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xueqi Zhang,Shichao Chen,Kang Wang,Zhongli Tang,Xitao Wang
The preparation of non-precious metal catalysts employed in oxygen evolution reaction (OER) is of great important for hydrogen production via electrocatalytic water splitting. In this work, a 2D/2D CoFe LDH/MOF heterostructure was constructed on nickel foam (NF) by in-situ partial conversion of CoFe MOF to CoFe LDH, and evaluated as an effective OER catalyst. Owing to the unique 2D/2D heterostructure, substantial electrochemical active surface area (ECSA), superior electron conductivity, accelerated mass/charge transfer kinetics and synergistic effect between the two materials, LDH/MOF-6 h sample combining structural features of both MOF and LDH exhibited a lowest overpotential of 257 mV, a small Tafel slope of 50.71 mV·dec ‑1 at 20 mA cm -2 current density, along with a highest ECSA of 108 cm 2 (27,000 cm 2 g -1 ). Moreover, LDH/MOF-6 h sample demonstrated superior stability over 100 h of continuous reaction in alkaline electrolyte, which indicates that 2D/2D CoFe LDH/MOF heterostructure is a highly future-oriented material for OER applications.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Wenhui Wang,Xinze Liu,Han Yang,Zexi Pei,Weihua Zou
The development of high-performance photothermal materials from sustainable and renewable resources is crucial for advancing solar energy technologies. Herein, we present a green and sustainable strategy for fabricating a novel composite material that leverages abundant biomass and biopolymers. A cellulose-based graphene/hexadecanol composite photothermal conversion material was successfully encapsulated with fully biobased xanthan gum and wood wax oil films (denoted as WTPCM-XW). This design capitalizes on the natural hierarchical structure of delignified wood as a sustainable scaffold, effectively supporting the organic phase change material while avoiding the need for synthetic polymer matrices. The incorporation of graphene enhances photothermal conversion efficiency. Notably, the entire system is designed for minimal environmental impact, utilizing a simple aqueous process and renewable encapsulation agents. The optimal composite material WTPCM10-XW achieves an exceptional photothermal conversion efficiency of 91.6% while demonstrating outstanding dimensional stability and durability. After undergoing a 60 h static water immersion test, the material retained its original shape, exhibiting a tensile force of 928.7 N and a tensile strength of 9.3 MPa. This work provides a sustainable paradigm for designing high-performance energy storage materials from renewable resources, offering significant potential for application in energy-efficient buildings and contributing to a circular economy.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Youwei Wang,Hehu Zhang,Enbo Nian,Weili Wang,Jiayi Qiao,Haoyang Yu,Lingling Lu,Ying Chen,Ang Wu,Chuanan Yao,Xiushan Wang
To address the issues of significant subjective errors and high susceptibility to interference from environmental factors and application scenarios in traditional colorimetry, and digital colorimetry for detecting pH and free chlorine. The present study innovatively proposes a detection method. This integrating digital image colorimetry with convolutional neural network (CNN). A portable, accurate, and efficient multi-angle rapid detection platform was developed, and the visualization of the detection process and results was realized via an APP with a built-in CNN model. Compared with the traditional fixed-angle detection method, multi-angle rotation detection effectively reduces the maximum detection error. For water sample detection within pH range of 6–9 and a free chlorine range of 0–5 ppm, the maximum detection error was 0.06 for pH and 0.09 ppm for free chlorine, with a response time of 1.2 s for both. The regression coefficients reached 0.9989 and 0.9987, respectively. With low detection errors, this method enables the rapid and accurate detection of water pH value and free chlorine content. This study provides new insights and a theoretical basis for the design and development of water quality detection equipment, and offers guiding significance for promoting technological upgrading and equipment innovation in the field of water quality detection.
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高影响因子
FUEL
·
2025
·
IF 7.5
Hongtao Fu,Kaoping Song,Erlong Yang,Lihao Liang,Yu Zhao,Zhehui Jin
Shale oil is an unconventional energy resource, and its efficient development is a key focus of current energy research. China’s continental shale resources are abundant, with high clay content and poor physical properties. The development of shale oil reservoirs after horizontal well fracturing remains suboptimal, requiring further recovery enhancement. Surfactant imbibition oil recovery technology is recognized as one of the effective methods for enhancing oil recovery in unconventional reservoirs. This study proposes a novel experimental apparatus and method for dynamic imbibition, and also develops a three-dimensional (3D) micro pore-fracture dynamic imbibition model. Furthermore, surfactant selection criteria based on wettability and interfacial tension are established. The results show that Cetyltrimethylammonium bromide (CTAB) forms ion pairs on the surface of shale pores, rapidly removing the oil film covering the shale surface. This induces a wettability reversal, reducing the water-phase contact angle from 132° to 55.1°. The use of the CTAB surfactant solution resulted in an 11.5 percentage points improvement in final imbibition efficiency. After CTAB surfactant solution detaches oil droplets from the shale surface, more of the water phase comes into contact with the clay minerals and micro-damage structures in the shale. Hydration induces new micro-damage in the shale, which accumulate and evolve into micro-fractures, creating flow channels for shale oil transport. Another key mechanism for enhancing the dynamic imbibition efficiency of continental shale oil is to modify the shale surface wettability while strategically adjusting interfacial tension. The selection criteria for surfactants used in shale oil dynamic imbibition should require not only wettability alteration capability but also an appropriate interfacial tension ranging from 2 to 10 mN/m. This balances the promoting effect of capillary forces with the suppressing effect of the Jamin effect, thereby facilitating the movement of oil droplets within deformed pores. Significant variations in average pressure within the pores enhance micro dynamic imbibition efficiency in shale. In the practical development of shale oil reservoirs, providing effective short-cycle energy replenishment and altering the average pressure within shale pores are crucial for guiding the enhancement of recovery in continental shale oil reservoirs.
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高影响因子
FUEL
·
2025
·
IF 7.5
Siyu Chen,Zhiyong Chen,Lu Tang,Jimei Xue,Zhijun Wang,Ying Li,Hanjun Wei
Porous heteroatom–doped carbon architectures have emerged as advanced multifunctional microwave absorbers. This study fabricates nitrogen–doped biomass-derived carbon using jackfruit through a coordinated KOH/urea activation–carbonization methodology. The carbonization temperature effectively regulates the porous structure, resulting in the formation of a thin material with a low density and broadband absorption. Upon being incorporated into a paraffin matrix at a 10 wt% loading (J-800 sample), the material exhibits enhanced electromagnetic (EM) wave absorption capabilities: a minimum reflection loss (RL min ) of − 46.3 dB at 1.75 mm, and an effective absorption bandwidth (EAB) of 5.6 GHz (covering the entire Ku band) at a thickness of 1.8 mm. This performance extends to the C-band range, where the material maintains an RL min of −28.9 dB and the EAB delivers 3.8 GHz (4.2−8.0 GHz) coverage across a thickness range of 2.85–5 mm. This nitrogen-doped biomass-derived carbon simultaneously achieves multifunctional superiority, exhibiting an 18.15 dB m 2 radar cross-section reduction, 131.7° hydrophobic surface characteristics, and efficient thermal management properties − stabilizing at 50.5 °C within 15 min under a thermal exposure of 157.5 °C. Concurrent infrared stealth compatibility complements these attributes, confirming that the developed strategy offers a streamlined synthetic route for engineering integrated microwave absorbers with combined EM attenuation, environmental resilience, and multispectral concealment capabilities.
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高影响因子
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