ACS Applied Materials & Interfaces
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2023
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IF 9.5
Yanhua Ma,Dongzhi Zhang,Zihu Wang,Hao Zhang,Hui Xia,Ruiyuan Mao,Haolin Cai,Huixin Luan
Flexible strain sensors based on self-adhesive, high-tensile, super-sensitive conductive hydrogels have promising application in human–computer interaction and motion monitoring. Traditional strain sensors have difficulty in balancing mechanical strength, detection function, and sensitivity, which brings challenges to their practical applications. In this work, the double network hydrogel composed of polyacrylamide (PAM) and sodium alginate (SA) was prepared, and MXene and sucrose were used as conductive materials and network reinforcing materials, respectively. Sucrose can effectively enhance the mechanical performance of the hydrogels and improve the ability to withstand harsh conditions. The hydrogel strain sensor has excellent tensile properties (strain >2500%), high sensitivity with a gauge factor of 3.76 at 1400% strain, reliable repeatability, self-adhesion, and anti-freezing ability. Highly sensitive hydrogels can be assembled into motion detection sensors that can distinguish between various strong or subtle movements of the human body, such as joint flexion and throat vibration. In addition, the sensor can be applied in handwriting recognition of English letters by using the fully convolutional network (FCN) algorithm and achieved the high accuracy of 98.1% for handwriting recognition. The as-prepared hydrogel strain sensor has broad prospect in motion detection and human–machine interaction, which provides great potential application of flexible wearable devices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Yena Liu,Qiuping Ran,Jiaqi Guo,Wenyuan Zhu,Rani Bushra,Xuguo Duan,Yang Huang,Zhengbing Jiang,Mohammad Rizwan Khan,Yongcan Jin,Huining Xiao,Junlong Song
Cellulose materials have poor wet strength and are susceptible to acidic or basic environments. Herein, we developed a facile strategy to modify bacterial cellulose (BC) with a genetically engineered Family 3 Carbohydrate-Binding Module (CBM3). To assess the effect of BC films, water adsorption rate (WAR), water holding capacity (WHC), water contact angle (WCA), and mechanical and barrier properties were determined. The results showed that CBM3-modified BC film exhibited significant strength and ductility improvement, reflecting improved mechanical properties of the film. The excellent wet strength (both in the acidic and basic environment), bursting strength, and folding endurance of CBM3-BC films were due to the strong interaction between CBM3 and fiber. The toughness of CBM3-BC films reached 7.9, 28.0, 13.3, and 13.6 MJ/m 3 , which were 6.1, 1.3, 1.4, and 3.0 folds over the control for conditions of dry, wet, acidic, and basic, respectively. In addition, its gas permeability was reduced by 74.3 %, and folding times increased by 56.8 % compared with the control. The synthesized CBM3-BC films may hold promise for future applications in food packaging, paper straw, battery separator, and other fields. Finally, the in situ modification strategy used to BC can be successfully applied in other functional modifications for BC materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Zhifei Liu,Chunxiang Lu,Shuxia Yuan,Xiaodan Ren,You Chen
Lithium-sulfur batteries (LSBs), one of the most promising electrochemical energy storage systems, are in the spotlight due to their high theoretical energy density , alongside environmental friendliness and low cost of sulfur. Several unforgiving issues, however, hamper their commercial applications, such as the notorious shuttle effect of intermediary polysulfides and retarded redox kinetics, growth of dendritic Li, among other things. The crux of sorting out the problems above is designing a versatile material with good electrical conductivity , catalytic activity, together with abilities in suppression of polysulfide shuttling and Li dendrite growth. In this work, a composite of Ni nanoparticles embedded in the gradient-porous carbon microspheres (Ni/PCMS), acting like a miniature reactor, was fabricated as a separator modification material. Adequate electron conductivity can be guaranteed by the carbon substrate and the inlays of Ni nanoparticles. The physical/chemical adsorption and high Li + transference number of Ni/PCMS assure suppressed shuttle effect and Li dendrite growth, respectively. Catalytic activity is fulfilled with the exposed Ni active sites. As a consequence, the batteries based on Ni/PCMS-modified separators achieve a high initial discharge capacity of 1426.7 mAh g −1 at 0.1 C and a low capacity fading rate of 0.078% per cycle over 800 cycles at 1 C. Even under a high sulfur mass loading of ∼ 3.0 mg cm −2 , the battery still displays a superior rate performance of 555.6 mAh g −1 at 0.5 C. This work provides a thought for the rational design of a wide range of separator modifiers for high-performance Li-S batteries.
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International Journal of Electrochemical Science
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2023
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IF 1.5
Hong Liu,Yichen Deng,Jinxiang Mao,Minmin Chen,Jinxia Hu,Zhicheng Ju,Zheng Xing,Xichuan Cao
Nitrogen-doped graphene (NG) materials were successfully synthesized in one step by the restricted template method. Specifically, the use of different nitrogen sources and carbon sources makes the content of various nitrogen doping structures in NGs different and yields a higher nitrogen doping amount. In the lithium insertion process, nitrogen doping provides more active sites, which effectively improve the specific capacity. As anodes for lithium-ion batteries (LIBs), NGs exhibit excellent electrochemical performance with high reversible specific capacity, good cycle stability, and excellent rate performance.
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Biosensors-Basel
·
2023
·Vol. 13
·期 6
·661
·
IF 5.4
Tongtong Zhang,Shuai Xu,Xingyu Lin,Jiyang Liu,Kai Wang
Herein we report a highly specific electrochemical aptasenseor for AFB1 determination based on AFB1-controlled diffusion of redox probe (Ru(NH3)63+) through nanochannels of AFB1-specific aptamer functionalized VMSF. A high density of silanol groups on the inner surface confers VMSF with cationic permselectivity, enabling electrostatic preconcentration of Ru(NH3)63+and producing amplified electrochemical signals. Upon the addition of AFB1, the specific interaction between the aptamer and AFB1 occurs and generates steric hindrance effect on the access of Ru(NH3)63+, finally resulting in the reduced electrochemical responses and allowing the quantitative determination of AFB1. The proposed electrochemical aptasensor shows excellent detection performance in the range of 3 pg/mL to 3 μg/mL with a low detection limit of 2.3 pg/mL for AFB1 detection. Practical analysis of AFB1 in peanut and corn samples is also accomplished with satisfactory results by our fabricated electrochemical aptasensor.Keywords:vertically aligned mesoporous silica films;electrochemical aptasensor;aflatoxin B1
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Frontiers in Plant Science
·
2023
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IF 5.6
Zhong Haixia,Yadav Vivek,Wen Zhang,Zhou Xiaoming,Wang Min,Han Shouan,Pan Mingqi,Zhang Chuan,Zhang Fuchun,Wu Xinyu
Xinjiang is the largest grape-producing region in China and the main grape cultivation area in the world. The Eurasian grape resources grown in Xinjiang are very rich in diversity. The sugar composition and content are the main factors that determine the quality of berries. However, there are currently no systematic reports on the types and contents of sugars in grapes grown in Xinjiang region. In this research, we evaluated the appearance and fruit maturity indicators of 18 grape varieties during fruit ripening and determined their sugar content using GC-MS. All cultivars primarily contained glucose, D-fructose, and sucrose. The glucose content in varieties varied from 42.13% to 46.80% of the total sugar, whereas the fructose and sucrose contents varied from 42.68% to 50.95% and 6.17% to 12.69%, respectively. The content of trace sugar identified in grape varieties varied from 0.6 to 2.3 mg/g. The comprehensive assessment by principal component analysis revealed strong positive correlations between some sugar components. A comprehensive study on the content and types of sugar will provide the foundation to determine the quality of grape cultivars and effective ways to utilize resources to improve sugar content through breeding.
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Nano Research
·
2023
·Vol. 16
·期 8
·11042-11047
·
IF 9.9
Wang Lei,Zhang Yuehan,Sun Xiaoxuan,Li Yunhui,Zhai Junfeng,Dong Shaojun
Eco-friendly chemical oxygen demand (COD) sensors are highly desired with respect to the importance of COD determination in environmental protection. In this work, a new FTO/TiO 2 /PbO 2 (FTO = fluorine-doped tin oxide) electrode was fabricated with a two-step method and used as an eco-friendly electrochemical COD sensor. The interlayer TiO 2 was employed to strengthen the adhesion of PbO 2 on the FTO substrates by providing a large TiO 2 /PbO 2 interface area. The effects of the factors including applied potential, supporting electrolyte concentration and stirring speed on the sensing performance were investigated. Under the optimized conditions, linear responses to the COD of water with different COD sources were achieved, and a linear range from 5 to 120 mg/L was obtained in the case of sucrose as the COD source. The relative standard deviations (RSD) were determined to be less than 9% for the glucose solutions with the COD of 7.5, 12.5 and 17.5 mg/L. For real sample analysis, the obtained results were comparable with those measured with the conventional dichromate method, with a relative error less than 11%.
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FOOD CONTROL
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2023
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IF 6
Yiyi Chen,Yanghong Shen,Yan Zhao,Junli Zhu,Haifeng Wang
A novel fluorescent immunochromatographic assay (ICA) with excellent specificity and sensitivity for evaluating trace residues of zearalenone (ZEN) in cereal samples was successfully developed. La 3+ -doped upconversion nanoparticles (UCNPs) were assessed as antibody labels, following optimization of doping ratios. Our results indicated that 20% La 3+ -doped UCNPs had superior morphological structure and fluorescence characteristics, making them the optimal UCNPs. After labeling 20% La 3+ -doped UCNPs with ZEN monoclonal antibodies (mAbs), optimal polyacrylic acid amount, coupled mAbs amount, detection time, and fluorescent immunoprobe concentrations were determined as 2.0 mL, 20 μg, 10 min, and 8 mg/mL, respectively. Under optimized detection conditions, the limit of detection (LOD) for ZEN standard solutions was 0.25 ng/mL with coefficients of variation (CVs) ＜ 8.67% and a high linear correlation (R 2 = 0.9944). Furthermore, specificity analysis demonstrated that prepared test strips were highly specific for the target mycotoxin . The LODs of ZEN in wheat and maize were both 0.5 μg/kg in spiking recovery experiments, and the recoveries were 87.65%–99.26% and 84.12%–95.12% with the CVs being 1.29%–7.14% and 4.03%–9.01%, respectively, confirming that the optimal UCNPs-ICA was efficient, straightforward, and suitable for rapid on-site screening of ZEN in cereals.
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International Journal of Electrochemical Science
·
2023
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IF 1.5
Hong-Wei Lv,Quan-Fu Li,Hui-Ling Peng
Sodium tetrafluorocuprate (Na 2 CuF 4 ) has been synthesized by the precipitation method. Then, Na 2 CuF 4 was applied to glucose electrocatalysis for the first time, and modified bare Au electrode to obtain Na 2 CuF 4 /Au. Na 2 CuF 4 /Au has strong anti-interference, extremely broad linear range of glucose detection, and great stability through stored for a long time at room temperature. A simple method was used to prepare Na 2 CuF 4 with different morphologies, and the effects of different morphologies for the glucose sensing performance were studied. The optimal experimental parameters of glucose sensing were obtained through parameter optimization, which leads to enhanced glucose sensing performance. The selected Na 2 CuF 4 was composed of large crystals and smaller crystals. The larger crystals sizes of selected Na 2 CuF 4 are in the range from 5 μm to 6 μm, and the smaller are in the range from 230 nm to 300 nm, the two are mixed together. The Na 2 CuF 4 /Au electrode showed high sensitivity and very wide linear range (the first 0.01-0.15 mM, the second 0.15-19.15 mM, the third 19.15-63.15 mM). The Na 2 CuF 4 /Au shows good accuracy, reproducibility and stability, as well as excellent selectivity. The properties of Na 2 CuF 4 indicate that it has a wide application prospect in the field of glucose electrocatalysis as a new glucose sensitive material.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yuxiao Hu,Xueying Chen,Zhijian Tan
Ammonium sulfate and t -butanol are widely used in conventional three-phase partitioning (TPP); however, their use is not eco-friendly. In this study, a novel TPP was developed using pH-responsive deep eutectic solvents (DESs) and sugars as substitutes for t -butanol and ammonium sulfate, respectively. This TPP was further used for the separation and purification of radish ( Raphanus sativus L.) peroxidase (POD). DES-3 (dodecanoic acid: decanoic acid = 1:1) and sucrose were selected as optimal phase-forming components. Single-factor experiments were performed to investigate the factors influencing the TPP process, and three major factors (sucrose concentration, extraction time, and extraction temperature) were optimized by response surface methodology (RSM). Under the optimized conditions, the POD recovery and purification fold reached 101.66% and 11.56, respectively. Cyclic experiments confirmed the retrievability of DESs. Sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE) confirmed that the novel TPP had better purification efficiency than the traditional TPP. The method proposed in this study is more efficient than conventional TPP, and it does not require the use of organic solvents and high concentration salt solutions. Therefore, this method is promising in the application of TPP.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 33
·2301727
·
IF 19
Amjad Farid,Chen Zhonghua,Abdul Sammed Khan,Muhammad Javid,Ijaz Ahmad Khan,Aqib Ali Khan,Zeng Fan,Lujun Pan
High fabrication cost, chemical instability, and complex immobilization of enzyme molecules are critical issues of enzyme-based glucose sensors. Designing state-of-the-art, binder-free, and non-enzymatic glucose sensing probes plays an imperative role to cope with the aforementioned issues. 3D carbonaceous nanomaterials coated with transition metal vanadates (TMVs) are a favorable biomimetic platform for glucose quantification. Peculiar hierarchical structure, enhanced conductivity, synergistic interaction, multiple oxidation states, and high catalytic activity would make such composite a potential contender for non-enzymatic glucose sensing. Herein, 3D helical-shaped carbon nanocoils (CNCs) are grown on nickel foam (NF) via chemical vapor deposition method to prepare a robust CNCs/NF scaffold. Then, a hydrothermal route is followed to grow interconnected free-standing Ni 3 V 2 O 8 nanosheets (NSs) on CNCs/NF scaffold. This novel and binder-free Ni 3 V 2 O 8 NSs/CNCs/NF hierarchical composite possesses superior electrochemical active area (ECSA) and exceptional electrochemical efficacy. Amperometric analysis exhibits extremely prompt detection time (0.1 s), elevated sensitivity (5214 µA mM −1 cm −2 ), and low detection limit (0.04 µM). Developed sensor demonstrates appreciable recoveries (93.3 to 103.3%) regarding glucose concentration in human serum. The appealing analytical results show that deployment of a 3D helical-shaped hierarchical smart scaffold can be an effective strategy for developing efficient and advanced non-enzymatic glucose sensors.
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ENERGY & FUELS
·
2023
·
IF 5.3
Kaifeng Lu,Yifan Wang,Lingjun Zhu,Bo Xing,Shurong Wang
The conversion of biomass-derived saccharides into platform chemicals is of immense importance for biorefineries. This study demonstrated the potential of using heteropoly acid as a catalyst in a green solvent system composed of γ-valerolactone and water for the production of levulinic acid from biomass-derived saccharides. The effects of heteropoly acids with different central heteroatoms (P and Si) and addendum atoms (W and Mo) on the catalytic conversion of glucose to levulinic acid in the γ-valerolactone–water system were studied. According to the experimental results, silicotungstic acid had the highest catalytic activity. In comparison to other catalysts, silicotungstic-acid-catalyzed glucose conversion could obtain the highest levulinic acid yield under the same reaction conditions, which was mainly attributed to the lower ratio of Brønsted/Lewis acid of silicotungstic acid. In optimal circumstances, 87.7% levulinic acid was obtained by glucose conversion at 190 °C and 60 min. Meanwhile, non-protonic polar solvent γ-valerolactone could promote the slight conversion of glucose to pentose, producing about 9% furfural. In addition, a kinetic model was established to further evaluate the reaction process of glucose conversion to levulinic acid and furfural. The green reaction system was also appropriate for other saccharides. In this study, a new approach could be provided to efficiently convert saccharides into platform chemicals.
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