CARBON
·
2025
·
IF 11.6
Jin Chen,Pei Liu,Kai Xu,Zhilei Hao,Guohui Tang,Changtian Zhu,Zixuan Ding,Shuai Yin,Zhiqiang Li,Zhen Ding,Yi Wang,Zhanpeng Liu,Siwen Yu,Xing Xin,Fenghua Liu
Na 3 V 2 (PO 4 ) 3 (NVP) material has evolved as a significant candidate for electrode materials in the development of sodium-ion batteries. However, the low conductivity of NVP material leads to low cycling performance, limiting their application in high-efficiency battery materials. To address this issue, this work proposes a novel strategy for materials design through constructing 3D network carbon-coatings on the surface of NVP materials. The carbon-coatings are achieved via a combination of sol-gel technique and heat treatment using pyrolytic carbon (C), carbon nanotubes (CNTs) and graphene (GN). In comparison to NVP@C, the electrochemical properties of NVP@C/GN, NVP@C/CNTs, and NVP@C/GN/CNTs have shown improvements. Among these, NVP@C/GN/CNTs exhibit the most outstanding electrochemical performance in the half-cell test. Specifically, this material demonstrates exceptional cycling stability, with a capacity of 92 mAh g −1 that can be maintained even after 800 cycles at a high-rate performance of 10C, with an attenuation of 10.6 %. The enhanced electrochemical performance is attributed to the specific ternary carbon-coating conductive structure, which significantly shortens the diffusion paths of Na + ions and electrons within NVP, resulting in improved Na + ion and electron transport kinetics. This study provides a new design paradigm for improving the conductivity of cathode material for sodium-ion batteries.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yanqian Gong,Shiyu Li,Yumeng Hu,Guanhong Jin,Hui Zhou,Loong-Tak Lim,Qian Xiao
This study explored a facile method for converting macadamia nutshells into bio-based nanomaterials, including cellulose nanofibers (CNFs) and lignin nanoparticles (LNPs), through deep eutectic solvent (DES) pretreatment coupled with a nanofabrication strategy. Comparisons of the physicochemical, morphological, and structural properties of the CNF and LNPs produced through acidic choline chloride/oxalic acid dihydrate (ACDES) and alkaline K 2 CO 3 /glycerol DES (ALDES) pretreatments were conducted using SEM, TEM, FTIR, XRD, TGA, GPC and 2D NMR. The CNFs obtained from ACDES pretreatment (ACCNFs) exhibited uniform and long filament-like structures with shorter whisker-like nanocrystals. Conversely, the CNFs produced with the ALDES pretreatment (ALCNFs) displayed irregular aggregates and nanofibril bundles. Additionally, the ACCNFs demonstrated higher crystallinity and contained small amounts of the oxalate half-ester compare to ALCNFs. During ACDES pretreatment, a large proportion of β-O-4, β-5, and β-β linkages in lignin disrupted and re-condensed to form lignin substructures, resulting in the assembly of cluster-like lignin nanoparticles pretreated with ACDES (ACLNP) aggregates. In contrast, lignin nanoparticles pretreated with ALDES (ALLNP) exhibited uniform nanospherical shapes because of the preservation of β linkages in lignin during the ALDES pretreatment. This work not only broadens the fabrication strategies for CNF and LNPs but also offered a promising approach for the valorization of lignocellulosic agricultural wastes.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xiaohui Sun,Dong Wang,Wei Wu,Xueying Zhao,Xuyang Zhang,Bo Wang,Xianhui Rong,Guohua Wu,Xiangwei Wang
The dual-band electrochromic smart windows (DESW) can selectively modulate visible (VIS) and near-infrared (NIR) transmittance, which is expected to effectively reduce building energy consumption. However, the complex preparation of dual-band electrochromic materials has restricted the further development of DESW. In this work, amorphous and crystalline Ti-doped WO3·2H2O (TiWH) were synthesized by a simple precipitation method, which does not require strict control of the oxygen content and temperature. Ti doping reduced the crystallinity of WO3·2H2O and increased the specific surface area. 3% TiWH films exhibited excellent dual-band electrochromism with high transmittance modulation (633 nm: 83.8%, 1050 nm: 72.5%), fast response time (bleached/colored time: 14.9/15.3 s at 633 nm, 16.0/3.5 s at 1050 nm), good coloration efficiency (633 nm: 22.8 cm2 C–1, 1050 nm: 90.8 cm2 C–1), and high capacitance of 47.1 mF cm–2 at 0.1 mA cm–2. The electrochromic device can still maintain good dual-band electrochromism (bright, cool, and dark modes). The excellent dual-band electrochromism and energy storage make TiWH have a good application prospect in green buildings.
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ANALYST
·
2024
·Vol. 149
·期 15
·4060-4071
·
IF 3.6
Jie Zhou,Huiting Wang,Yaxian Chen,Dongxue Lin,Ling Zhang,Zhiqiang Xing,Qian Zhang,Jiarui Xia
The precise quantitative analysis using surface-enhanced Raman spectroscopy (SERS) in an uncontrollable environment still faces a significant obstacle due to the poor reproducibility of Raman signals. Herein, we propose a facile method to fabricate a self-calibrating substrate based on a flexible polyvinyl alcohol (PVA) film comprising assemblies of Prussian blue (PB) and Au NPs (PB@Au) for reliable detection. PB cores were coated with an Au shell through simple electrostatic interaction, forming core–shell nanostructure PB@Au assemblies within the PVA film. The outer Au layer provided identical trends in enhancement for both the PB core and neighboring targets while PB cores served as an internal standard (IS) to correct signal fluctuations. The prevention of competitive adsorption on the metal surface between targets and ISs was achieved. The proposed PVA/PB@Au film exhibited enhanced stability of Raman signals after IS correction, resulting in improved spot-to-spot and batch-to-batch reproducibility with significantly reduced standard deviation (RSD) values from 11.42% and 25.02% to 4.43% and 9.39%, respectively. Simultaneously, a higher accuracy in the quantitative analysis of 4-mercaptobenzoic acid (4-MBA) and malachite green (MG) was achieved with fitting coefficient (R2) values improving from 0.9675 and 0.9418 to 0.9974 and 0.9832, respectively. Moreover, the PVA/PB@Au film was successfully applied to detect residual MG in real fish samples. This work opens up an avenue to improve the reproducibility of Raman signals for flexible SERS substrates in the detection of residues under various complex conditions.
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MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Xiaoli Guo,Tingze Ren,Hongbo Li,Qingxin Lu,Xin Di
In this work, a natural deep eutectic solvent combined with microwave-assisted extraction (NADES-MAE) was studied and effectively utilized for the simultaneous extraction of the flavonoids from Scutellaria baicalensis. NADES composed of L-proline and urea were selected to achieve the efficient extraction of baicalin, baicalein, and wogonin. Box Behnken design (BBD) was applied to optimize the extraction conditions. The optimum conditions were as follows: L-proline and urea with a molar ratio of 2:1, water content of 40 %, extraction temperature of 110 °C, extraction time of 20 min, and liquid–solid ratio of 40 mL/g. Compared with the traditional extraction method, NADES-MAE displays the merits of higher yield, shorter extraction time, and less organic solvent consumption. In addition, the as-prepared NADES was characterized by FTIR and 1 H NMR, and the extraction mechanism for the flavonoids was investigated by density functional theory. The outcomes of biological activities in vitro showed that the extracts revealed desirable antioxidant activity. After assessing the ecological impact, the cytotoxicity of NADES was investigated and the results displayed that toxicity of the NADES was very low or even negligible with EC 50 > 2000 mg/L. The results indicated that the suggested approach was sensitive, green, and simple, showing good potential for analysis of active components from natural sources.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Wenjie Wu,Jieyu Wan,Weijia zhou,Jun Shao,Shuiliang Chen,Haoqing Hou,Zhiwei Lei
With the growing contamination of oily wastewater, there is a pressing need to identify a material capable of effectively promoting the separation of oil–water mixtures. Although a large number of materials were applied to the oil–water separation, there are few materials can be applicable for a wide range of oily wastewater, and the separation of oily wastewater with complicated oil and water contents is still a challenge. In this study, the stainless steel mesh (SSM) was modified by the (NH 4 ) 2 S 2 O 8 /NaOH mixed solution and oxalic acid solution subsequently, then, a micro-thin layer of polydopamine (PDA) was deposited on the modified SSM (PCO-SSM). Results indicated that the PCO-SSM was superhydrophilic/underwater superoleophobic and exhibited excellent anti-pollution property. The PCO-SSM can efficiently separate a wide range of oil–water mixtures, such as oily wastewaters from kitchen oils, industrial oils and organic solvents. Furthermore, for the oily wastewater with complicated oil compositions and waters at different harsh conditions, the PCO-SSM can also separate them with a high water flux (10 4 –10 5 L m −2 h −1 ) and separation efficiency (＞99.0 % for most of cases). The excellent separation performance of the PCO-SSM provides a eurytopic material for oil–water separation.
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LANGMUIR
·
2024
·
IF 3.7
Tianyun Zhang,Yanci Wang,Yu Li,Yuan Li,Xiangye Li,Peiyao Dou,Fen Ran
In order to alleviate the dendrite problem of zinc-ion batteries, a gel electrolyte is prepared by Maillard reactions occurring between hydrolyzed wool keratin and carboxymethyl cellulose under heating conditions. The prepared gel electrolyte with the addition of hydrolyzed wool keratin possesses good mechanical properties, and its maximum breaking strength, Young’s modulus, and elastic modulus are 58.7, 10.77 MPa, and 157.73 MJ m2, respectively, which are far superior to those of the pure carboxymethyl cellulose gel electrolyte. Because hydrolyzed wool keratin includes amino acids and polypeptides, the ionic conductivity of the prepared gel electrolyte is improved. More importantly, amino and carboxyl groups introduced by hydrolyzed wool keratin contribute to uniform deposition of zinc ions and ease dendrite growth. The assembled symmetric battery was stable for 600 h at a current density of 0.5 mA cm–2 with a capacity of 0.5 mAh cm–2. Combined with a NH4V4O10 cathode, a full battery provides a cycling stability of over 2000 h with a Coulomb efficiency of 98.02%.
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INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 3.1
Peng Yijin,Yun Yurou,Zou Wenhui,Zhou Linyan
Our study analysed the quality differences between 6 pomegranate varieties grown in Yunnan. The results showed that the composition and contents of anthocyanins, the amount of polymeric pigments produced by the reaction between anthocyanins and tannins, and pH were the primary factors affecting the colour of pomegranate arils. Fructose and citric acid were the main sugar and organic acid contributing to the taste of pomegranate arils. In total, 42 phenolic compounds were identified, with BS being classified as a distinct group due to higher concentrations of ACNs and flavonols. Additionally, 32 volatile compounds were identified, with TLZ, SP, and TGY grouped, BS, TNS, and HRY grouped into another. The key phenolic metabolic pathways included flavone and flavonol biosynthesis, anthocyanin biosynthesis, and phenylpropanoid biosynthesis, while fatty acid biosynthesis, pyruvate metabolism, and sulfur metabolism were the main volatile metabolic pathways. These results provide valuable guidance for agricultural practices and promoting industrial development.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Zhiyu Xue,De Ning,Kaihong Jia,Hao Liu,Yong Xiang,Jinlong Cao,Junxian Chen,Yeshuang Zhong,Xinyu Wang,Zhen Zhang
Carbon dots (CQD) have received significant attention as a novel ratiometric fluorescent pH nanoprobe, owing to their favorable optical properties and excellent biocompatibility. Despite their appealing features, the precise mechanism behind the pH-sensitive photoluminescence of CQDs remains to be fully understood. This study endeavors to unravel the mechanism underlying the pH-responsive ratiometric fluorescence in dual-emission CQDs, synthesized through a one-step hydrothermal method using o-phenylenediamine and oxalic acid as precursors. The resultant CQDs exhibit inherent dual-emission at wavelengths of 383 nm and 566 nm, with the ratiometric fluorescence response tailored by the ratio of precursors, providing a robust tool for pH sensing across a range of 2 to 6. Detailed characterizations, including chemical, morphological, and optical analyses, alongside theoretical insights from time-dependent density functional theory (TD-DFT), elucidate the mechanism underlying the pH-dependent luminescence, attributed to the electron cloud transmission between amide and adjacent carboxyl groups on the CQD surface. The superior performance of these CQDs in real-time pH monitoring is demonstrated through their application in glucose oxidase-catalyzed reactions, showcasing their potential as efficient, reliable nanoprobes for biomedical research and diagnostic applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wei Ding,Min Feng,Ziqi Zhang,Faying Fan,Long Chen,Kewei Zhang
Triethylamine, an extensively used material in industrial organic synthesis, is hazardous to the human respiratory and nervous systems, but its accurate detection and prediction has been a long-standing challenge. Herein, a machine learning-motivated chemiresistive sensor that can predict ppm-level triethylamine is designed. The zero-dimensional (0D) bismuth vanadate (BiVO 4 ) nanoparticles were anchored on the surface of three-dimensional (3D) tungsten oxide (WO 3 ) architectures to form hierarchical BiVO 4 /WO 3 heterostructures, which demonstrates remarkable triethylamine-sensing performance such as high response of 21 (4 times higher than pristine WO 3 ) at optimal temperature of 190 °C, low detection limit of 57 ppb, long-term stability, reproducibility and good anti-interference property. Furthermore, an intelligent framework with good visibility was developed to identify ppm-level triethylamine and predict its definite concentration. Using feature parameters extracted from the sensor responses, the machine learning-based classifier provides a decision boundary with 92.3 % accuracy, and the prediction of unknown gas concentration was successfully achieved by linear regression model after training a series of as-known concentrations. This work not only provides a fundamental understanding of BiVO 4 -based heterostructures in gas sensors but also offers an intelligent strategy to identify and predict trace triethylamine under an interfering atmosphere.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xianhua Zhang,Yuan Liang,Fan Liu,Jie Liu,Bin Yu,Wenbo Li,Mengyu Yuan,Haozhe Tang,Yanchao Zhao,Dongxiao Ji,Kangkang Ou,Jianxin He,Xiaoyan Sun,Weili Shao
Among indoor air pollutants, particulate matter with a diameter less than 2.5 μm (PM 2.5 ) and volatile organic compounds with small molecules are the greatest threat to human health. However, complete removal of these pollutants is challenging, and the incomplete removal causes secondary pollution. In this study, manganese dioxide nanoparticles (MnO 2 NPs) were controllably grown on the surface of mullite nanofibers (MNFs) using a potassium permanganate (KMnO 4 ) reduction method to prepare MNF@MnO 2 composite membranes that could effectively remove PM 2.5 and formaldehyde from indoor air. After loading the optimal amount of MnO 2 NPs, the filtration efficiency of a nanofiber membrane for salt particles with diameters of 0.3 μm increased from 97.32 % to 99.47 %, and the removal rate of formaldehyde reached 88.3 % within 170 min in the closed laboratory space. After five repeated tests, the formaldehyde decomposition rate remained above 80 %. The MNF@MnO 2 membrane was successfully used to prepare an indoor air purifier filter element, demonstrating considerable potential for improving the indoor air quality and reducing health risks.
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TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Qian Jia,Xiaobo Wang,Zhuang Xu,Chao Ju,Bingbing Lai,Bo Dai,Yongqin Han
Shear thickening fluids (STFs) have attracted increasing attention as smart materials with unique rheological properties. However, the preparation of STFs usually relies on a composite system of spherical nanoparticles with polyethylene glycol . In this work, novel multi-phase STFs (ILSTFs) were prepared in an ionic liquid by incorporating nanosized SiO 2 and rod-shaped calcium metasilicate (CaSiO 3 ) particles as a dispersed phase . Compared to traditional STFs, ILSTFs demonstrate excellent thermal stability. Rheological tests indicate that ILSTFs exhibit continuous shear thickening behavior, resulting in excellent energy absorption and impact wear resistance. In addition, ILSTFs can serve as a new type of lubricant. The tribological properties and impact resistance of ILSTFs were highly correlated with the shear thickening effect, with the multi-phase ILSTF system with CaSiO 3 demonstrating superior impact wear resistance compared to the single-phase system. In this study, finite element analysis (FEA) is further utilized to investigate the local damage evolution and energy absorption rate of STF under impact loading , providing insights into the underlying mechanism. This ionic liquid-based STF holds promise for applications as a flexible filling component in the fields of lubrication technology and impact protection structures.
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