Gels
·
2025
·Vol. 11
·期 11
·929
·
IF 5.3
Mingkang Wang,Shuai Yu,Jing Wang,Xin Zhao,Changpeng Yang,Ran Wei,Chun Liu,Sizhao Zhang
Polyimide aerogels have garnered considerable attention due to their high-performance combination of a lightweight nature, low thermal conductivity, and high mechanical strength, which renders them ideal candidates for thermal insulators in aerospace. However, the inherent conflict in achieving multifunctional (dimensional stability and mechanical stiffness at high temperatures, and highly efficient thermal insulation) integration presents a great challenge. Here, we present an aerogel skeleton construction strategy based on hybridizing an Al–O network phase to create multifunctional polyimide aerogels. The resulting aerogels partially constructed by Al–O network phase exhibit an outstanding resistance to high temperatures (shrinkage of 0.56% after experiencing 200 °C for 2400 s), which is markedly superior to that of conventional polyimide aerogels. The excellent insulation capability of the aerogel is reflected in its low thermal conductivity (0.0214 W m −1 K −1 ) and its ability to maintain a cold-side temperature of just 59.7 °C under a 150 °C heat source. Furthermore, remarkable enhancements in mechanical properties are found at high-temperature conditions, providing evidence for the compressive stresses of 0.329 and 0.394 MPa under 3% strain at the respective temperatures of 200 and 250 °C, showing a clear trend of enhanced compressive stress with rising temperature. These advancements in high-temperature stability and mechanical properties substantially broaden the scope for their potential applications in aerospace thermal protection systems.
研究领域:
材料科学
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航空航天工程
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热防护系统
·
聚合物纳米复合材料
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Zeyu Yin,Xiaobo Ma,Lijian Ni,Huaijun Sun,Yueyue Wang
The PEC sensor constructed from wide-bandgap Ga₂O₃ and narrow-bandgap CdS for enhanced tetracycline (TC) detection, overcoming conventional limitations like low sensitivity and complex operation. CdS/Ga₂O₃ composites were synthesized via a one-step hydrothermal method, enabling efficient separation and transport of photogenerated carriers through band modulation. Compared with pure CdS or Ga₂O₃, the heterojunction exhibited a sixfold photocurrent enhancement, improved response time, and superior stability. The sensor demonstrated excellent repeatability (RSD = 0.359%), selectivity, and sensitivity for TC concentrations from 1 pM to 50 μM, achieving a low detection limit of 0.045 μM. Tests on lake and river water confirmed high practical applicability, with RSD<2%. To further improve detection accuracy, three machine learning algorithms—SVR, Random Forest, and XGBoost—were applied to photoelectric response data across TC concentrations, using cross-validation and feature selection to build predictive models. Random Forest outperformed others, offering the best error evaluation and fitting accuracy while reinforcing the linear correlation between TC concentration and photoelectric response. This work provides new insights into quantitative antibiotic detection and underscores the potential of heterojunction engineering for PEC sensor optimization.
研究领域:
环境监测
·
分析化学
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材料科学
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光电化学
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机器学习应用
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Micro & Nano Letters
·
2020
·Vol. 15
·期 3
·125-129
·
IF 0.975
Chulei Zhao,Kaihang Cao,Chaoyun Ma,Wenjun Li,Yiju Song,Xiuwen Qiao,Chenglin Hong
In this experiment, a Cu 2 O spherical nanoparticle was reduced by hydrothermal reaction to prepare a label-free electrochemical immunosensor based on a novel signal amplification strategy. Multi-walled carbon nanotubes are a platform that combines cuprous oxide with carbon nanotubes. Nanogold was modified on the surface of cuprous oxide nanospheres by electrostatic adsorption to further amplify the electrochemical signal and link-supported anti-alpha-fetoprotein (AFP). Under optimal conditions, the proposed immunosensor has a wide linear range from 0.001 to 40 ng/ml, with a detection limit as low as 0.33 pg/ml ( S / N = 3). Furthermore, the proposed label-free immunosensor has been used to determine AFP in human serum with satisfactory results. At the same time, it has good reproducibility, acceptable selectivity and long-term stability, and has broad application prospects in biometric analysis.
研究领域:
分析化学
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纳米科技
·
生物化学
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生物医学工程
·
电化学
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高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Tong-Mou Geng,Deng-Kun Li,Zong-Ming Zhu,Wei-Yong Zhang,Sai-Nan Ye,Hai Zhu,Zhu-Qing Wang
A novel conjugated microporous polymer based on perylene tetraanhydride bisimide (DP 2 A 2 ) has been synthesized through Sonogashira–Hagihara cross-coupling polymerization of tetrabromo-substituted perylene tetraanhydride bisimide derivative (DPBr 2 ABr 2 ) with 1,4-diethynylbenzene, whose Brunauer–Emmett–Teller (BET) specific surface area is about 378 m 2 g −1 . The fluorescence quenching behaviors of the DP 2 A 2 were investigated. It is found that the DP 2 A 2 shows high sensitivity and selectivity to tracing o-nitrophenol (o-NP) in THF with Ks V constant of 2.00 × 10 4 L mol −1 . The detection limit (LOD) is 1.50 × 10 −9 mol L −1 . The possible sensing mechanism for the luminescent quenching of DP 2 A 2 towards o-NP exciting at 365 nm was considered the donor–acceptor electron transfer mechanism, which is a combined result from both dynamic (collisional) and static quenching. Moreover, the static quenching process is dominant for DP 2 A 2 .
研究领域:
材料科学
·
分析化学
·
聚合物化学
·
传感器与传感技术
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122655
·
IF 7.5
Pan Ye,Da-Mao Xu,Qing-Jun Meng,En-Wei Cao,Xue-Qiang Zhu
o-Chlorotoluene ( o -CT) is a representative organic pollutant that poses potential risks to ecosystems and human health. Currently, microbial degradation of o -CT remains inefficient and requires improvement. Therefore, in this study, two novel o-chlorotoluene-degrading bacteria— Raoultella planticola OCT-DM2 and Escherichia fergusonii OCT-DM4—were successfully isolated from chemically contaminated soil, and an efficient degrading bacterial community (OCT-MC) was constructed by combining these strains. After optimization, OCT-MC achieved an 80.5% degradation of o -CT under the following conditions: pH 7, 35 °C, 15% (v/v) inoculum, and an initial o -CT concentration of 200 mg L −1 . Gas chromatography-mass spectrometry (GC-MS) analysis identified five key metabolites, based on which a degradation pathway of o -CT by the consortium OCT-MC was proposed. In this pathway, o -CT was initially transformed into toluene via reductive dechlorination, followed by aromatic ring cleavage and oxidative reactions, ultimately leading to complete mineralization. Integrated genomic and transcriptomic analyses further revealed that redox-related genes within OCT-MC acted synergistically to facilitate o -CT degradation. Notably, genes encoding key enzymes, such as benzylsuccinate synthase (BSS), were significantly upregulated at the transcriptional level, providing molecular-level insights into the high degradation efficiency of the OCT-MC consortium. Overall, the constructed consortium OCT-MC exhibits considerable potential for the bioremediation of o-chlorotoluene–contaminated environments and offers a theoretical basis for elucidating the molecular mechanisms underlying chlorinated aromatic hydrocarbon degradation by mixed microbial consortia.
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高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Bo-wen Yang,Sheng-yang Ji,Tian Zhao,Zhang-tie Wang,Yan-song Zhang,Qian-nan Pan,Wei-su Huang,Bai-yi Lu
Although phytosterols (PS) showed various excellent health functions, their applications in the food industry were limited by poor water solubility and high oxidation sensitivity. This study investigated the fabrication of phytosterol-enriched emulsions stabilized by different emulsifiers and evaluated the effect of different interfacial layers on the photooxidation of phytosterols and emulsions. The emulsions were prepared with Tween 20, whey protein isolate (WPI), and soy protein isolate (SPI) to achieve interfacial membranes with different properties. The SPI-dextran mixture or dextran-glycated SPI was adopted as the additional emulsifier. Compared with Tween 20, high molecular weight emulsifiers (proteins and their mixtures) exhibited stronger photooxidation stabilities and high viscosity and density of droplet interfacial membrane. The stability of PS emulsions that undergo photooxidation was impacted by the inclusion of these emulsifiers, whereas the extent of phytosterols photooxidation was, from highest to lowest, in the following order: SPI/dextran mixture > glycated SPI mixture > WPI > SPI > Tween 20. The proper SPI concentration (1.5 wt%) showed the highest interface pressure and viscosity and the higher PS stability. Moreover, the higher rheological properties and surface pressure of droplets reveal extra oxidative stability and lower oxidation rate of PS, as well as the formation of additional 7β-OH products. This work demonstrates that emulsions may be tuned toward better photooxidation oxidative stability by modifying interface composition and interfacial properties.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaoyan Li,Rui Zhao,Hongfang Li,Jing Jiang,Lunhong Ai,Xuejuan Cao,Juanli Liu,Hanjun Zou,Youyu Duan
Suffering from inefficient separation and transfer of photogenerated carriers, the deeply photocatalytic oxidation of NO-to-NO 3 – over g-C 3 N 4 is still a daunting challenge. Well-designed heterojunction photocatalysts have been proven to be effective in steering charge transfer for achieving a particular migration path and more active sites, which hold huge promise in further performance stimulation. Herein, in-situ face-to-face hydrothermal approach is developed to prepare a multilayer heterostructure O doping g-C 3 N 4 (O-g-C 3 N 4 ) with W 18 O 49 (O-g-C 3 N 4 @W 18 O 49 ). The experimental and theoretical results show that the unique multilayer heterostructure can improve the separation efficiency of carriers by changing the electron migration path. Moreover, doping O atoms are identified as the newly formed active centers to largely facilitate the activation of NO. Impressively, the O-g-C 3 N 4 @W 18 O 49 photocatalyst thus exhibits largely improved photocatalytic NO removal rate (56.7 %, 0.1 g of sample) and high selectivity of NO to NO 3 – (98.3 %). It outperforms the reported photocatalysts materials in visible light. This study not only provides a facile strategy for experimentally screening advanced photocatalytic materials, but also paves the way for the deep oxidation of NO.
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Food & Function
·
2023
·Vol. 14
·期 4
·2200-2211
·
IF 6.1
Dongbao Cai,Xusheng Li,Qingjie Xu,Haiwei Li,Ruijing Liu,Jiali Chen,Xinwei Jiang,Jianxia Sun,Caiyong Lai,Weibin Bai
Testicular hyperthermia induced by unhealthy living habits and pathological or occupational factors can cause spermatogenic dysfunction with an outcome of sub-fertility or even infertility. Cyanidin-3-O-glucoside (C3G) is the most typical anthocyanin in foods that has been recognized as an antioxidant with promising protection for male reproduction. However, its specific effect against testicular hyperthermia and the mechanisms involving its primary gastrointestinal metabolite protocatechuic acid (PCA) are still unexplored. In the present study, testicular hyperthermia in mice was established by employing a single hot water bath at 43 °C for 30 min. C3G and PCA were intragastrically given to investigate their prevention ability against heat stress-induced testicular damage. It was found that C3G and PCA restored the external diameter and thickness, and alleviated atrophy and vacuolation of seminiferous tubules. Simultaneously, C3G and PCA enhanced testicular heat stress tolerance through reducing superfluous eIF2α phosphorylation and stress granule formation. C3G and PCA effectively improved the testicular antioxidant system and regulated the IRE1α-XBP1 pathway, contributing to mitigatory spermatogenesis dysfunction and testicular damage. This finding revealed that anthocyanins were the novel compounds for alleviating testicular damage, and provided a reliable theoretical basis for improving male fertility disturbed by heat stress.
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PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Jie Jiang,Ziying Hong,Zhiyuan Qiao,Qianlong Zhu,Hong Zhang,Yanxiao Jiang,Kai Yu
It has been a challenge to accurately characterize the chain growth mechanism during copolymerization. Herein, an electrochemistry-microtube-mass spectrometry (EC-mTube-MS) was developed for on-line monitoring of aniline (ANI) electro-copolymerized with o-phenylenediamine (oPD). Short-lived intermediates and co-oligomers belonging to polyANI-oPD were structural identified with tandem MS method for the first time. The free binding between ANI and oPD monomers determined the presence of more species for a given co- n -mer. Chain growth was found to compete with 2H + , 2e − intramolecular oxidation of co-oligomers, resulting in the units with quinone or phenazine structures. MS signals for polyANI and polyoPD were observed as well, indicating that the homopolymerization occurred simultaneously with the copolymerization, which may affect the formation efficiency even performance of the final copolymer. Investigations on the monomer feed ratio and solution pH provided data support for improving the copolymerization efficiency, and the recommended parameters are c ANI : c oPD ≥ 10:1 and pH = 7.
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npj Biofilms and Microbiomes
·
2023
·Vol. 9
·期 1
·1-13
·
IF 9.2
Zhao Tong,Zhang Yue,Nan Linhua,Zhu Qing,Wang Shukai,Xie Yutao,Dong Xinling,Cao Cui,Lin Xiaoliang,Lu Yu,Liu Yuxia,Huang Linjuan,Gong Guiping,Wang Zhongfu
Understanding how dietary polysaccharides affect mucin O -glycosylation and gut microbiota could provide various nutrition-based treatments. Here, the O -glycan profile of the colonic mucosa and gut microbiome were investigated in C57BL/6J mice fed six structurally diverse dietary polysaccharides and a mixture of six fibers. Dietary polysaccharides increased total O -glycans, mainly by stimulating neutral glycans. Highly branched arabinogalactan promoted terminally fucosylated core 1 O -glycans; whereas linear polysaccharides, including pectin, konjac glucomannan, inulin, and the fiber mixture, favored terminally di-fucosylated O -glycans. The last three polysaccharides also lowered the level of sulfated O -glycans and sialylated mono-fucosylated O -glycans. Varied monosaccharide composition in mixed polysaccharides had a synergistic beneficial effect, boosting fucosylated neutral glycans, decreasing acidic glycans, and stimulating microbial richness and diversity. Dietary polysaccharides containing arabinose and sulfate groups enhanced the relative abundances of Akkermansia and Muribaculaceae , respectively. The present comparison reveals the relationship between dietary polysaccharide structure, mucin O -glycan composition, and intestinal microorganisms.
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PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chaogang Zhou,Chaojin Zhou,Jiawei Zhang
The poly(o-phenylenediamine)-ZnO (PoPD-ZnO) composite were synthesized by in-situ polymerization, and the waterborne polyurethane was used as the binder. The corrosion inhibition performance of the PoPD-ZnO composite coating on stainless steel was investigated. The structures of homopolymer PoPD and PoPD-ZnO composite were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Cyclic voltammetry demonstrates the redox properties and stability of the composite. After soaking in 3.5% NaCl for a certain period of time, the corrosion resistance of the polymer coating was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results show that the homopolymer PoPD coating and the PoPD-ZnO composite coating can protect the stainless steel. The corrosion rate of the PoPD-ZnO composite coating with good corrosion resistance is 1.9% of bare steel. In addition, the addition of nano-ZnO facilitates the formation of a compact and low-defect coating, thereby impeding the erosion of corrosive media and improving the corrosion resistance of PoPD coatings.
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JOURNAL OF SURFACTANTS AND DETERGENTS
·
2023
·Vol. 26
·期 6
·771-778
·
IF 1.6
Peng Wei,Faming Wu,Qinghua Zhang,Zhirong Liu
Oil-in-dispersion (O/D) emulsions are the focus in many fields due to their new microstructures and new functions. Herein, O/D emulsions were successfully prepared using series of cationic gemini surfactants 12-s-12 (s = 2, 3, and 6) and alumina nanoparticles. The microstructures and type of emulsions were identified using optical microscopy, zeta potential and contact angle methods. Gemini surfactants with two head groups carry more charges than that of conventional surfactants when adsorbed at the oil–water interface. The O/D emulsions can be stabilized at lower surfactant concentrations compared with the conventional single-headed surfactants. In the presence of 0.1 wt% alumina nanoparticles, gemini surfactants 12-s-12 (s = 2, 3, and 6) can stabilize emulsions at the concentration of 3 × 10 −4 mM (1.84 × 10 −5 wt%), 6 × 10 −4 mM (3.76 × 10 −5 wt%) and 1 × 10 −3 mM (6.68 × 10 −5 wt%), respectively. Addition of excessive organic salts such as sodium salicylate and sodium p-methylbenzenesulfonate shielded the head group charges of gemini surfactants, leading to gemini surfactants to behave as nonionic surfactants Adsorption of surfactants at the alumina nanoparticles occurred, resulting in the transformation from the O/D emulsions to Pickering emulsions. This work shows the advantages of preparing O/D emulsions using gemini surfactants and also provides a new methods of emulsion type transformations by adding excessive oppositely charged organic salts.
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高影响因子
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