SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 8.3
Chen Chen,Sijie Chen,Yu Zhang,Jinhong Liu,Shenghui Xia,Vishal Chaudhary,Praveen Sekhar,Larry Nagahara,Chao Wang,Hui Zhang,Pengfei Cheng,Pradeep Bhadola,Wei Liu,Thomas Thundat,Zhimin Li,Ajit Khosla
Pristine metal oxide gas sensors often suffer from poor selectivity and limited polarizability. The objective of this work is to overcome these bottlenecks by developing an advanced material tailored specifically for highly sensitive and intelligent NO 2 sensing applications. Consequently, oxygen vacancy-rich 2D ultrathin Cs-doped WO 3-x nanosheets were synthesized via a solvothermal method. KPFM, UPS, and TAS confirmed that optimal Cs doping (0.08 mol%) optimizes the surface work function and drastically prolongs the photo-generated carrier lifetime (
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Innovative Food Science & Emerging Technologies
·
2026
·
IF 6.9
Tao Li,Lang Guo,Kang Yang,Yong Guo,Xinhui Wang,Jing Li
Photooxidation and microbial contamination are two major factors responsible for postharvest deterioration of fresh fruits, and active packaging offers an effective strategy for shelf-life extension. In this work, multifunctional and eco-friendly nanocomposite films were fabricated from polyvinyl alcohol/gelatin (PVA/GEL) incorporated with branched polyethyleneimine (PEI)-grafted carbon dots (CDs) and citral Pickering emulsions (CIT-PE) stabilized by β-cyclodextrin (β-CD) particles. Fourier-transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) analysis suggested physical interactions between the PVA/GEL matrix and the incorporated active components. The incorporation of CIT-PE and CDs significantly enhanced the UV-shielding, antibacterial, and antioxidant properties of the films. In particular, the PG/E8/C0.8 film exhibited complete UV-blocking ability in the UV region (200–400 nm), strong antibacterial activity against E. coli (18.05 ± 0.20 mm) and S. aureus (55.54 ± 0.87 mm), and high DPPH radical scavenging activity (84.49 ± 3.47%). In cherry tomato preservation experiments, the PG/E8/C0.8 film effectively delayed quality deterioration, maintaining a vivid appearance, lower weight loss (4.24%), and better retention of total soluble solids and titratable acidity after 16 days of storage compared with the control group. Overall, this work provides a feasible strategy for developing multifunctional active packaging materials for postharvest food preservation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
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IF 8.2
Peiyi Jin,Linzhou Chen,Jinjian Zhong,Tiefeng Yuan,Lin Gan,Jilong Huang,Liping Wang,Huajun Fan,Chen Lin
Dioscoreae nipponica Makino ( D. nipponica ) as the rhizome of dioscoreaceae rich in steroidal saponins, has been reported to have the hypolipidemic effects etc. However, it is still unclear which exact active components are primary responsible for the beneficial effects. This study was conducted to fish out the lipase inhibitors from D. nipponica , and evaluate the inhibitory activity on porcine pancreatic lipase (PPL) through in vitro kinetic assay using p -nitrophenyl palmitate as substrate. Accordingly, the ethanolic extract was subjected to D101 macroporous resin purification for spectrophotometric screening, high performance liquid chromatography (HPLC) separation and structural characterization by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry. Through orlistat validation, the PPL inhibitory activity and IC 50 value of the extract were respectively 68.34 ± 1.47 % and 107.05 μg/mL under the optimized inhibition conditions. From 6 steroidal saponins identified, the inhibitory components named the protodioscin, protogracillin, dioscin and gracillin were fished out by grouping separation and HPLC analysis. Furthermore, dioscin and gracillin with the parent structure of diogenin were confirmed as the major inhibitors by virtue of stability tests based on transformation of protodioscin and protogracillin. Finally, the inhibitory mechanism of the major inhibitors toward PPL was further clarified by kinetic analysis and molecular docking analysis. The proposed method not only revealed the PPL inhibitory components in D. nipponica , but also provided an effective approach to hierarchical screening of PPL inhibitors from natural plants.
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EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Weiwen Gu,Lifei Wei,Tianyi Ma,Yuhang Wu,Anying Zhang,Jianfei Wei,Rui Wang
2-Carboxyethyl(phenyl) phosphinic acid (CEPPA) is an effective phosphorus-containing flame retardant for PET. However, the release of poisonous and harmful smoke increases when CEPPA is added to PET matrix (CEPPA-PET) during the combustion process. To address this, biomass gelatin-based Carbon Dots (gCDs) was adopted as nontoxic green smoke suppression agent. When the gCDs was copolymerized into CEPPA-PET matrix by in situ polymerization (CEPPA-gCDs-PET), the peak smoke production rate was reduced by 59.38% and the CO yield was decreased by 13.83%. It was found the limited oxygen index of CEPPA-gCDs-PET rose to 31% from 21% and could achieve a V-0 rating in the UL-94 test when the content of gCDs and CEPPA were only 1.0 wt% and 5.0 wt%, respectively. What is more, in comparison with neat PET, the peak heat release rate significantly decreased by 42.66% and the total heat release was reduced by 48.10%, the peak smoke production rate is also reduced by 59.38%. Besides, the tensile strength of CEPPA-gCDs-PET increased by 11.93% for CEPPA-PET. At the same time, the addition of gCDs was beneficial for the improvement of UV resistance for CEPPA-PET, and the transmittance of sleeves prepared from the fiber of CEPPA-gCDs-PET is less than 5% from 240 nm to 400 nm. Thus, a higher efficiency flame retardant, mechanical enhancement and UV resistance system was constructed with only 5 wt% CEPPA and 1 wt% gCDs toward CEPPA-PET copolymer.
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PROGRESS IN ORGANIC COATINGS
·
2022
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IF 6.206
Zhen Yang,Yongping Bai,Binxiao Wei,Yutao Cui,JunHui Huang,Yingying Li,Linghui Meng,Yu Wang
As reported herein, UV rapid curing fluorosilicone coatings with good hydrophobicity and corrosion resistance were developed with a novel fluorosilicone polymer possessing thiol functional groups (PTFPMS-SH) and a series of fluorosilicone polymers having different vinyl content (PTFPMS-Vi). The chemical structures of the prepared polymers (PTFPMS-Vi and PTFPMS-SH) were first characterized by FT-IR (fourier infrared transform spectroscopy) and 1 H NMR (nuclear magnetic resonance), confirming the successful synthesis of expected polymers. Subsequently, the curing process, basic properties, thermal properties and surface properties of the UV cured fluorosilicone coatings were investigated. Moreover, the application of the fluorosilicone coatings as anti-corrosion coatings in the field of circuit boards were also preliminarily explored. The results show that the photocuring reaction based on the thiol-ene reaction for the preparation of fluorosilicone coatings is very effective because the conversion rate of carbon‐carbon double bonds can reach more than 95 % within 5 s under UV irradiation. These obtained fluorosilicone coatings exhibit transparency higher than 90 %. The contact angle of the obtained coatings ranges from 100° to 110°, showing their excellent hydrophobicity . Furthermore, the fluorosilicone coatings with outstanding corrosion resistance show their potential application worth as protective coatings for electronic devices.
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MOLECULES
·
2022
·Vol. 27
·期 7
·2088
·
IF 4.927
Xue-Li Liu,Yong-Hui Wang,Shu-Yue Ren,Shuang Li,Yu Wang,Dian-Peng Han,Kang Qin,Yuan Peng,Tie Han,Zhi-Xian Gao,Jian-Zhong Cui,Huan-Ying Zhou
The efficient capture of multi-pollutant residues in food is vital for food safety monitoring. In this study, in-situ-fabricated magnetic MIL-53(Al) metal organic frameworks (MOFs), with good magnetic responsiveness, were synthesized and applied for the magnetic solid-phase extraction (MSPE) of chloramphenicol, bisphenol A, estradiol, and diethylstilbestrol. Terephthalic acid (H2BDC) organic ligands were pre-coupled on the surface of amino-Fe3O4composites (H2BDC@Fe3O4). Fe3O4@MIL-53(Al) MOF was fabricated by in-situ hydrothermal polymerization of H2BDC, Al (NO3)3, and H2BDC@Fe3O4. This approach highly increased the stability of the material. The magnetic Fe3O4@MIL-53(Al) MOF-based MSPE was combined with high-performance liquid chromatography-photo diode array detection, to establish a novel sensitive method for analyzing multi-pollutant residues in milk. This method showed good linear correlations, in the range of 0.05–5.00 μg/mL, with good reproducibility. The limit of detection was 0.004–0.108 μg/mL. The presented method was verified using a milk sample, spiked with four pollutants, which enabled high-throughput detection and the accuracies of 88.17–107.58% confirmed its applicability, in real sample analysis.Keywords:magnetic metal organic framework (MMOFs);magnetic solid-phase extraction (MSPE);multi-pollutants;high-performance liquid chromatography (HPLC)
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Materials Horizons
·
2022
·Vol. 9
·期 5
·1479-1488
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IF 15.717
Can Zou,Qing Liu,Kai Chen,Fei Chen,Zixuan Zhao,Yunxuan Cao,Congcong Deng,Xingfu Wang,Xiaohang Li,Shaobin Zhan,Fangliang Gao,Shuti Li
Polarization-sensitive photodetectors are the core of optics applications and have been successfully demonstrated in photodetectors based on the newly-emerging metal-halide perovskites. However, achieving high polarization sensitivity is still extremely challenging. In addition, most of the previously reported photodetectors were concentrated on 1D lead-halide perovskites and 2D asymmetric intrinsic structure materials, but suffered from being external bias driven, lead-toxicity, poor stability and complex processes, severely limiting their practical applications. Here, we demonstrate a high-performance polarization-sensitive and stable polarization-sensitive UV photodetector based on a dendritic crystal lead-free metal-halide CsCu2I3/GaN heterostructure. By combining the anisotropic morphology and asymmetric intrinsic structure of CsCu2I3 dendrites with the isotropic material GaN film, a high specific surface area and built-in electric field are achieved, exhibiting an ultra-high polarization selectivity up to 28.7 and 102.8 under self-driving mode and −3 V bias, respectively. To our knowledge, such a high polarization selectivity has exceeded those of all of the reported perovskite-based devices, and is comparable to, or even superior to, those of the conventional 2D heterostructure materials. Interestingly, the unsealed device shows outstanding stability, and can be stored for over 2 months, and effectively maintained the performance even after repeated heating (373K)-cooling (300K) for different periods of time in ambient air, indicating a remarkable temperature tolerance and desired compatibility for applications under harsh conditions. Such excellent performance and simple method strongly show that the CsCu2I3/GaN heterojunction photodetector has great potential in practical applications with high polarization-sensitivity. This work provides a new insight into designing novel high-performance polarization-sensitive optoelectronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuchun Li,Shuang Qiu,Jun Sun,Yajing Ren,Shuheng Wang,Xingguo Wang,Wenjia Wang,Hongfei Li,Bin Fei,Xiaoyu Gu,Sheng Zhang
Despite the advantages of biological compatibility and high transparency, there are still some drawbacks for Poly(lactic acid) (PLA) such as highly flammability and poor ultraviolet resistance. Herein, a fully bio-based additive (PA@CHTM) with a core–shell structure is synthesized by chitosan microspheres and phytic acids. The introduction of PA@CHTM simultaneously improves the mechanical properties, flame retardancy, and UV-blocking performance of PLA, accompanied by an accelerated degradation capacity in soil. By the presence of 9 wt% PA@CHTM in the PLA composite sample, the limiting oxygen index value is increased from 18.2% to 29.6%, and the UL-94 test grade is improved to V-0. The tensile strength is well maintained and Young's modulus is sharply increased for PLA/PA@CHTM composites. Moreover, the photoaging process of PLA can be significantly delayed due to the excellent free radical quenching capacity of PA@CHTM. Only less than 10% UV light can be penetrated for the PLA/9%PA@CHTM sample, and the ultraviolet protection factor is increased from 0.77 of control PLA to 30.07. More importantly, the addition of PA@CHTM can accelerate the degradation of PLA, which is of significance for biodegradable materials. This work firstly provides a green strategy to fabricate fully bio-based polymer composites with high performance, long service life, and rapid degradation in soil.
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BIOMACROMOLECULES
·
2021
·
IF 6.988
Heng Fang,Nianrong Feng,Dongfu Wu,Dongying Hu
The collection, storage, and use of energy and information are important issues for overcoming the global energy shortage while satisfying the demand for information transmission. This research reports a nano-Fe3O4 and erythritol (ER)-functionalized, cross-linked methyl cellulose aerogel (MC–EP) composite that has the characteristics of phase-change energy storage as the magnetic and ultraviolet responses requisite for light-to-heat conversion and storage. The nano-Fe3O4 particles in MC–EP–ER-75 were fixed and filled into pore structures in MC–EP. ER was used to form an effective combination with MC–EP. The addition of nano-Fe3O4 compensated for the low thermal conductivity of ER. The MC–EP–ER-75 was able to store solar radiation-induced energy due to the loading of ER at a photothermal conversion efficiency of 79.67% and a light-to-heat conversion efficiency of 79.67%. The results of thermal stability (TGA) analysis showed that MC–EP–ER-75 was thermally degraded acceptably below 200 °C. The differential scanning calorimetry curve and latent heat values (melting/crystallization enthalpies of 314.8 and 197.9 J/g, respectively) of MC–EP–ER-75 did not change after 100 cycles. In addition, it exhibited excellent saturation magnetization, super-paramagnetism, and ultraviolet shielding, as well as a rapid response to the ultraviolet and magnetic fields. This provided a way to prepare light-to-heat conversion–storage–release materials and ultraviolet–magnetic sensors that can be used in renewable resources.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 16
·52001
·
IF 3.125
Shujian Zhang,Yang Lu,Kewu He,Xianghui Meng,Lanfang Que,Zhenbo Wang
To solve the issues of low ionic conductivity, poor interfacial stability, and weak mechanical strength in the current polymer electrolytes, herein, the UV curing method is proposed to in-situ polymerize the plastic crystal composite solid polymer electrolyte (S-PCCE). By using ethoxylated trimethylolpropane triacrylate (ETPTA) as polymerization monomer, in conjunction with the butadiene nitrile and other additives, the S-PCCE is prepared under ultraviolet light. The S-PCCE shows improved ionic conductivity than other solid electrolyte materials. The ionic conductivity at room temperature can reach 0.98 × 10 −3 S/cm, and it can reach 2.8 × 10 −3 S/cm at 55°C, which is beneficial to achieve high battery performance. The LiFePO4/S-PCCE/Li battery has a high initial discharge specific capacity of 150.4 mAh/g at 0.2C, and the highest discharge specific capacity can reach 162.5 mAh/g. Moreover, after 100 cycles, the battery can still maintain a high discharge specific capacity of 154.2 mAh/g, with a Coulomb efficiency of 98.4%. At the same time, the electrolyte has excellent high-temperature adaptability, and can still work stably at 55°C with improved ionic conductivity. The superior performance of this material indicates that the plastic crystal composite polyacrylate solid electrolyte based on UV curing method can be used to prepare a high-performance lithium-ion battery, and this technology can also be compatible with existing lithium-ion battery equipment.
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COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Yuyang Zhou,Benjamin Tawiah,Nuruzzaman Noor,Zheng Zhang,Jun Sun,Richard K.K. Yuen,Bin Fei
The integration of bio-based functional agents with biopolymers is welcomed as a way of meeting the growing demand for healthy, safety, and sustainability. This study presents a facile and solvent-free fabrication of flame retardant (FR), UV protective, and reinforced poly(lactic acid) (PLA) composite using two bio-based complexing couples: tannin acid/ferric salt (TAFe) and chitosan/phytic acid (CTSPA). The thermal and burning properties of PLA composites were evaluated by thermogravimetric analysis (TGA), limited oxygen index (LOI), UL-94 test, and cone calorimetry . The UV protective and tensile properties were also evaluated. PLA/TAFe and PLA/CTSPA showed earlier mass loss and higher char residue than pristine PLA. CTSPA (3 wt%) enhanced the LOI value of PLA from 19.6% to 30.5%. PLA/CTSPA and PLA/TAFe/CTSPA achieved V-0 ratings in UL-94 test with slight melt dripping. Cone calorimetry demonstrated that 2.5 wt% apiece of TAFe and CTSPA led to obvious reductions in peak heat release rate and total heat release. Interestingly, the combination of TAFe and CTSPA was effective in suppressing CO production. PLA/TAFe had a higher UPF value (50+) and tensile strength than pristine PLA. In conclusion, the sustainable strategy developed in this study represents the concept of fabricating fully bio-based polymer composites via a solvent-free process, which can also be generalized into the eco-design for other multifunctional polymer systems .
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Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Xiaofeng Huang,Qiulin Deng,Huiwei Liao,Hongquan Deng,Jinlong Jiang,Lixiong Zhang,Xinjun Yao
The treatment process of metal plating wastewater in industry usually exists excessive consumption of chemicals, coproduction of sludge and complex reuse of metal. At present, some available technologies have been designed for effective removal of specific metal ions rather than entire metals ions in effluents. Herein, a novel strategy of treating waste with waste is proposed that using metal plating wastewater containing Zn(Ⅱ) to prepare 3D Luffa cylindrical (LC) / heterogeneous ZIFs (h-ZIF-8) composite (LC/h-ZIF-8) for photocatalytic degradation of organic pollutants (Nitrofurazone (NFZ), Methylene blue (MB), Rhodamine B (RhB) and Congo red (CR)) and mixed-dye wastewater. The strategy realized the efficient treatment of electroplating wastewater, expediently reuse of metal ions and removal of organic contaminants . Moreover, investigations of cycling performance indicated the photocatalytic stability and easy separation from water. Furthermore, the spectroscopy and electrochemical are employed to elaborate possible degradation mechanisms, expounding the LC/h-ZIF-8 possess lower recombination rates of carriers and transfer resistance of electron compared with ZIF-8. Therefore, the work proposes a new strategy for the efficient treatment of metal wastewater and achieves the combination of resource recovery and wastewater treatment with the advantages of simple operation and mild conditions.
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危险品化学品经营许可证（带存储）