CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shasha Wei,Yayun Zheng,Jianfeng Liu,Jitao Shang,Fei Lv,Tong Yang,Zhaofu Zhang,Yan Xiong,Qiu He,Yan Zhao
To address the severe challenges of sluggish reaction kinetics and shuttle effects in lithium-sulfur (Li–S) batteries, this study ingeniously employed an efficient microwave-assisted (MA) strategy to rapidly synthesize the MXene–NiSe 2 @C (denoted as MA MX–NiSe 2 @C) heterostructure, serving as a sulfur host material. This method offered key benefits such as rapid and uniform heating, along with high energy efficiency. Theoretical simulations validated that the MXene–NiSe 2 heterostructure interface promoted the electron transfer processes, enhanced polysulfides adsorption, catalyzed the multi-step reduction of sulfur, and significantly reduced the energy barrier for Li 2 S decomposition. Electrochemical experiments demonstrated that MA MX–NiSe 2 @C notably improved Li–ion diffusion kinetics, accelerated sulfur redox reactions, and effectively mitigated shuttle effects. As a result, Li–S batteries based on the MA MX–NiSe 2 @C cathode exhibited a high initial capacity of 1222 mA h·g −1 at 0.1C, enhanced rate performance of 619 mA h·g −1 at 2C, and remarkable cycling stability. Even after 1000 cycles at a high 2C rate, the average capacity decay rate per cycle remained at only 0.054 %. This efficient synthesis method for MXene–transition metal selenide electrocatalysts, coupled with a thorough investigation of their adsorption and catalytic mechanisms in the intricate multiphase electrochemical reactions of Li–S batteries, provides strong support for the ongoing advancement of Li–S battery technology.
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TALANTA
·
2024
·
IF 5.6
Xueli Yuan,Jing Kong,Ying Xie,Xinxin Liu,Wei Zhang,Tao Liu,Zhenyu Chu,Wanqin Jin
The abuse of kanamycin (KAN) poses an increasing threat to human health by contaminating agricultural and animal husbandry products, drinking water, and more. Therefore, the sensitive detection of trace KAN residues in real samples is crucial for monitoring agricultural pollution, ensuring food safety, and diagnosing diseases. However, traditional assay techniques for KAN rely on bulky instruments and complicated operations with unsatisfactory detection limits. Herein, we developed a novel label-free aptasensor to achieve ultrasensitive detection of KAN by constructing mesoporous DNA-cobalt@carbon nanofibers (DNA-Co@C-NFs) as the recognizer. Leveraging the extended π-conjugation structure, prominent surface area, and abundant pores, the Co@C-NFs can effectively load aptamer strands via π-π stacking interactions, serving as KAN capturer and reporter. Due to the change in DNA configuration upon binding KAN, this aptasensor presented an ultralow detection limit and ultra-wide linear range, along with favorable precision and selectivity. Using real tap water, milk, and human serum samples, the aptasensor accurately reported trace KAN levels. As a result, this convenient and rapid autosensing technique holds promise for onsite testing of other antibiotic residues in agriculture, food safety, and clinical diagnosis.
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Polymers
·
2024
·Vol. 16
·期 2
·186
·
IF 4.7
Wenbin Wang,Wei Qiang,Chuntao Chen,Dongping Sun
The utilization of titanium dioxide (TiO2) as a photocatalyst for the treatment of wastewater has attracted significant attention in the environmental field. Herein, we prepared an NH2-MIL-125-derived N-doped TiO2@C Visible Light Catalyst through an in situ calcination method. The nitrogen element in the organic connector was released through calcination, simultaneously doping into the sample, thereby enhancing its spectral response to cover the visible region. The as-prepared N-doped TiO2@C catalyst exhibited a preserved cage structure even after calcination, thereby alleviating the optical shielding effect and further augmenting its photocatalytic performance by increasing the reaction sites between the catalyst and pollutants. The calcination time of the N-doped TiO2@C-450 °C catalyst was optimized to achieve a balance between the TiO2content and nitrogen doping level, ensuring efficient degradation rates for basic fuchsin (99.7%), Rhodamine B (89.9%) and tetracycline hydrochloride (93%) within 90 min. Thus, this study presents a feasible strategy for the efficient degradation of pollutants under visible light.Keywords:titanium dioxide;NH2-MIL-125;N-doped TiO2@C;visible light photocatalysis;wastewater pollutants
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Molecular Catalysis
·
2024
·
IF 3.9
Chengliang Wang,Yin Zhang,Haitao Li,Feifan Zhang,Jie Wang,Wei Wei,Yongxiang Zhao
Core-shell Ni@C catalysts with a uniform grain size distribution were synthesised via a simple hydrothermal method followed by pyrolysis carbonisation, and their catalytic performance for the liquid-phase hydrogenation of maleic anhydride (MA) was investigated herein. When the pyrolysis temperature was 350 °C, the resulting Ni@C catalyst (Ni@C-350) possessed abundant Ni/NiO heterostructures and a carbon surface layer. Among the analysed catalysts, Ni@C-350 demonstrated the lowest apparent activation energy for the hydrogenation of C C bonds ( Ea = 34.3 KJ/mol) and C O bonds ( Ea = 65.18 KJ/mol), yielding an MA conversion of 100 % and a γ-butyrolactone (GBL) selectivity of 99.89 % under mild reaction conditions (200 °C, 3 MPa hydrogen pressure, and 0.05 g catalyst). Furthermore, the Ni@C-350 catalyst exhibited high stability, with the yield of GBL above 95 % after five consecutive usage cycles. Ni@C-350 significantly outperformed other previously reported catalysts for the liquid-phase hydrogenation of MA.
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Photonics
·
2024
·Vol. 11
·期 9
·820
·
IF 2.1
Ningyi Wang,Bingwei Liu,Xu Wu,Yan Peng
Vitamin C (VC) and Vitamin B9 (VB9) are essential micronutrients integral to numerous biological functions and critical for maintaining human health. The rapid detection of these vitamins is important for verifying nutritional supplements and aiding in clinical diagnoses. This study combined terahertz time-domain spectroscopy (THz-TDS) with metasurface technology to develop a fast, sensitive, and non-destructive detection method for VC and VB9. Firstly, we determined the characteristic absorption peaks and molecular vibration modes of VC and VB9 within the 0.5–4.0 THz range through quantum chemical calculation and THz-TDS measurement. Then, we designed and fabricated a metasurface biosensor to match its resonance peak with the communal peak of VC and VB9, enhancing the interaction between THz waves and these vitamins. Using this biosensor, we analyzed solutions with different concentrations of VC and VB9. An increase in vitamin concentrations resulted in frequency shifts in the THz resonance peak. Quantifiable relationships between frequency shifts and the vitamin concentrations were established. The detection limits achieved were 158.82 ng/µL for VC and 353.57 ng/µL for VB9, respectively. This method not only demonstrates high sensitivity but also simplifies the operational process, offering an innovative tool for applications in food safety monitoring and clinical diagnostics.
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MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Xinru Li,Yaoning Bai,Yuwei Yan,Taoyuan Ouyang,Xiaodi Jiang,Xu Wang,Xiaoming Cai,Jinming Cai,Honglin Tan
Metal-induced photocatalysis has been a relatively effective strategy for the efficient use of solar energy. In this paper, highly efficient and stable Ag@C/SrTiO 3 photocatalysts were prepared by compounding silver nanocubes wrapped with few layers graphite with strontium titanate materials. We obtained silver nanocubes with a uniformly dispersed size of about 35 nm by varying the surface energy of silver and inducing the preferential binding of PVP on the (100) crystal plane with the help of selective adsorption of chloride ions on the different crystal planes of silver. As obtained under the characterisation of UV–visible absorption spectra, the material has a broad visible light absorption (450–900 nm). The Ag@C/SrTiO 3 has a hydrogen reduction rate of up to 457.5 μmol g −1 ·h −1 under simulated sunlight, which is ∼200 % higher than the SrTiO 3 and ∼900 % higher than the sliver. Moreover, the catalyst was stable, still producing 93.5 % hydrogen after three cycles of testing, and the photocatalyst structure did not change as known from the XRD data of the material before and after testing. The present work demonstrates the feasibility of rational design of efficient and stable silver-based photocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaolin Lan,Ran Wang,Wenbo Liu,Zhanhua Huang,Pengyang Deng,Zhijiang Wang
Selecting suitable components and microstructure are effective way to design intense coupling of wave impedance and electromagnetic dissipation capacity in the field of electromagnetic (EM) wave absorption materials. Herein, we propose the construction of a novel composite composed of carbon fibers derived from biomass serve as a skeleton to support the loaded with flower-like FeS (FeS/hollow C). The unique microstructure creates the generation of abundant heterogeneous interfaces, impedance matching and multiple loss mechanism, allowing for synergistic effect of dielectric loss and magnetic loss, thereby promoting their EM absorbing properties. The FeS/hollow C absorber exhibited excellent EM wave absorption performance, with an effective absorption bandwidth (EAB) of 7.20 GHz, and a minimum reflection loss (RL) of −65 dB with the thickness of 2.2 mm. The study provides a new strategy for constructing composite absorbers with ingenious structures, which is significant for the preparation, development, and functional application of biomass-based materials.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jie Huang,Yanlin Zhang,Junhong Lu,Haoyang Jiang,Ben Liang,Benyuan Wang,Dafang He,Haiqun Chen
Recently, silicon-based anode materials have garnered significant attention from researchers due to their high theoretical specific capacity. However, these materials are highly prone to volume expansion, which significantly hinders their further commercialization. Here, the skeleton of silicon nanoparticles (Si NPs) is constructed from metal–organic frameworks (MOFs) in order to buffer their volume increase and enhance electrochemical performance. In this study, a solvent-thermal reaction is conducted using a mixture of NiFe-MIL and sodium hydroxide solution to deposit a carbon layer around the Si NPs, while simultaneously creating a highly conductive graphene network. Si materials supported by inward multi-channel carbon were synthesized through high-temperature pyrolysis. This unique double-layer carbon structure endows the material with remarkable electrochemical properties, including enhanced cycle stability and lithium storage capacity. The Si@C–NiFe-MIL@reduced graphene oxide (Si@C–NiFe-MIL@rGO) electrode materials exhibit a high specific capacity of 2092.8 mA h g−1 at a current density of 50 mA g−1. Furthermore, they demonstrate a stable reversible capacity of 851 mA h g−1 after 200 cycles at a current density of 1000 mA g−1. This research may provide a different strategy for producing high-energy, reasonably priced silicon anodes for lithium-ion batteries (LIBs).
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-14
·
IF 5.3
Guo Qi,Wang Du,Ma Fei,Fang Mengxue,Zhang Liangxiao,Li Peiwu,Yu Li
Phytosterols (PSs), a class of naturally occurring bioactive lipid compounds, have been found to possess a significant cholesterol-lowering effect. In developing countries, the consumption of rapeseed oil is the primary pathway of PS intake for the general population. However, developing low-cost, real-time, and high-throughput screening techniques for PSs remains a challenge. Here, a Cu-based nanocomposite CuOx@C was synthesized via a simple method of the calcination of HKUST-1 and systematically characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The CuOx@C demonstrated excellent peroxidase-like (POD-like) activity, functioning as a peroxidase mimic to facilitate the catalysis of 3,3′,5,5′-tetramethylbenzidine (TMB) into its oxidized form (oxTMB), thereby initiating a discernible color response. On the basis of this discovery, a CuOx@C-based colorimetric method for detecting total sterols in rapeseed was successfully constructed via cascade reactions. After optimizing the conditions, the high-throughput screening of total sterols in rapeseed could be completed in only 21 min, which significantly facilitated the sensing of PSs. A linear range of 0.6–6 mg/g was achieved for the detection of total sterols in rapeseed samples, thereby satisfying the requirements for detection. In addition, due to the high stability of CuOx@C and the specificity of cholesterol oxidase, the developed method had excellent stability and selectivity toward PSs, indicating that this work has huge prospects for commercial application. This innovative work overcomes the limitation of the instrumental method and provides a portable and reliable tool for total sterols detection. It can also facilitate the development of oilseeds with a high content of PSs. Graphical abstract
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhuoran Sun,Wenjing Song,Hongli Chen,Lili Li
Designing and constructing reversible and stable anode materials was vital to lithium/sodium-ion batteries. Here, multiple carbon-protected Mn and Fe based composite anode with three-dimensional cross-linked networks was designed. The MnFe 2 O 4 composite nanoparticles were synthesized via co-precipitation firstly. Then by combining different coating technologies and heat treatment, MnO/Fe 3 C with stable carbon doped (MnO/Fe 3 C@C 3 ) composite anode for lithium/sodium-ion storage was prepared. The results showed that MnO/Fe 3 C@C 3 exhibited the excellent reversible capacities of 608.2 mAh g −1 at 0.2 C after 100 cycles and 348.2 mAh g −1 at 10 C after 1500 cycles for lithium-ion battery. MnO/Fe 3 C@C 3 as sodium-ion anode also showed the capacity of 282.4 mAh g −1 at 0.2 C after 100 cycles. The study indicated that MnO/Fe 3 C as active components were produced by the doped carbon participating in redox reaction. In addition, the stable doped carbon was also formed by the binding of graphitic carbon with carbon layers. GITT and EIS tests revealed that the addition of MWCNTs could effectively enhance the ion transport kinetics and further optimize the electrochemical performance. This study highlighted a way to construct the active component with stable doped carbon as anode, which could exhibit the excellent recyclability and electrochemical performance.
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Energy Storage Materials
·
2024
·
IF 18.9
Jingjing Yan,Bo Liu,Jian Wang,Junyang Zeng,Bei Li,Xin Zhang,Shujun Zhang,Ce-Wen Nan
Dielectric polymers with capacitive energy storage capabilities are essential for advanced electronics and electrical systems. However, a persistent challenge lies in enhancing their energy density at elevated temperatures. Despite the exploration of high-glass transition temperature ( T g ) polymers with superior dielectric-thermal stability, they face limitations in terms of low dielectric constant ( ε r ) and reduced breakdown strength ( E b ) under heightened temperatures. Here, we propose a blending strategy through synergistic design of intra-molecular structures and inter-molecular interactions between polyurea and polyetherimide (PEI), achieving simultaneously enhanced ε r and E b at elevated temperatures. The molecular structures of polyureas were initially designed to determine the optimal polyurea species for blending with PEI. The meticulously balanced polymer blend exhibits a significantly increased ε r , alongside superior dielectric-thermal stability up to 150 °C. Additionally, the distinct electrostatic potential between polyurea and PEI contributes to an enhanced E b . As a result of combined enhancement in ε r and E b , the blended polymer exhibits an ultra-high energy density of 9 J cm −3 at 150 °C, while maintaining a remarkable energy efficiency of 93 %. These outstanding energy storage characteristics surpass those of state-of-the-art dielectric polymers, underscoring the substantial potential of blended polymers for high-temperature energy storage applications.
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Polymers
·
2018
·Vol. 10
·期 3
·298
·
IF 2.935
Zhiling Li,Ping Guan,Xiaoling Hu,Shichao Ding,Yuan Tian,Yarong Xu,Liwei Qian
Molecularly imprinted mesoporous materials (MIMs) were synthesized to improve the adsorption performance of Cytochrome c (Cyt c) by using an imidazolium-based amphiphilic ionic liquid 1-octadecyl-3-methylimidazolium chloride (C18MIMCl) as surfactant in aqueous solution via the epitope imprinting approach. The surface-exposed C-terminus nonapeptide of Cyt c (residues 96–104, AYLKKATNE) was utilized as the imprinted template. The nitrogen adsorption-desorption, thermo-gravimetric analysis, and transmission electron microscopy verified the successful preparation of MIMs with ordered mesoporous structure. The adsorption isotherm studies showed that the obtained MIMs exhibited superior adsorption capacity toward Cyt c of 86.47 mg·g−1because of the high specific surface areas of 824 m2·g−1, and the appropriate pore size promoted the mass transfer of Cyt c, causing a rapid adsorption equilibrium within 20 min. Furthermore, these MIMs still remained excellent selectivity and recognition ability according to the selective as well as the competitive adsorption studies, suggesting that the molecularly imprinted mesoporous materials is expected to be used in the field of highly efficient separation and enrichment of proteins.Keywords:amphiphilic ionic liquids;molecularly imprinted mesoporous silica;epitope imprinting;Cytochrome c
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