ACS Applied Polymer Materials
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2024
·
IF 4.4
Xiaonan Huang,Yulian Chen,He Jiang,Jiajun Hu,Xi Guo,Yanjuan Zhang,Jianzhang Li,Weisheng Sun,Yi Zhang
The development of melamine-formaldehyde (MF) resin-impregnated paper has great significance in the decoration and construction industries. However, the MF-impregnated paper is prone to cracking and burning due to the inherent brittleness and poor flame retardancy of MF resin, restricting its wide application. Herein, we report a hyperbranched polysiloxane (HBPSi@EP) containing a flexible Si–O–C skeleton and tailored terminal epoxy using a simple, low-cost, and easily controlled ester exchange strategy to modify MF resin for fabricating high-performance and multifunctional impregnated paper. The break elongation of MF/HBPSi@EP impregnated paper increased by 186.5% since the energy dissipation of the hyperbranched structure and lubrication of the Si–O–C skeleton enhance its toughness. The tough MF/HBPSi@EP impregnated paper displayed outstanding cracking resistance during the thermal–cooling cycle. Meanwhile, the tensile strength of MF/HBPSi@EP impregnated paper reached 10 MPa, owing to the formation of a dense cross-linked structure by the hyperbranched epoxy in the HBPSi@EP. Notably, this impregnated paper exhibited good flame retardancy (B1-level in GB 8624-2012), cigarette burn resistance (Level 4 in GB/T 17657-2013), and wear resistance (1305.5 r). This facile and effective strategy can promote the development of tough, strong, and versatile coatings, film materials, and multifunctional composites.
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PROGRESS IN ORGANIC COATINGS
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2024
·
IF 6.5
Jianguo Liu,Wenrui Huang,Kailong Zhang,Gan Cui,Xiao Xing
Smart coatings play a crucial role in achieving excellent corrosion protection on metals and alloys. However, the preparation of smart composite coatings with a dual function of self-reporting and self-healing remains a challenge. In this paper, 1,10-phenanthroline-5-amine (Phen) was grafted onto graphene oxide (GO) by the dehydration condensation method, and flaxseed oil crosslinked o-phenanthroline-modified graphene oxide (PGO) was used as the core and polyurea-formaldehyde (PUF) as the wall, and the harvesting emulsion method and in situ polymerization method were used to prepare microcapsules. The effects of stirring speed, temperature, polyvinyl alcohol (PVA) content and core-to-wall ratio on the dispersion of grafting and reaction conversion rate, as well as the microcapsule encapsulation rate, drug loading, and size were investigated to derive the optimal grafting process of PGO and the optimal preparation process parameters of microcapsules. Finally, the prepared microcapsules were incorporated into the epoxy coating, and the early warning, self-repairing and anticorrosive properties of the composite coatings with different microcapsule contents were investigated by impregnation test and electrochemical test. The results showed that the optimal grafting process of PGO was at a temperature of 80 °C, a stirring speed of 750 rpm, and an initial pH of 2. The optimal preparation process parameters of microcapsules were: stirring speed 500 rpm, reaction temperature 50 °C, optimal PVA content 6 % of urea, core to wall ratio 1.25:1. When the addition of PGO was 0.3 wt% and the microcapsule addition amount was 15 wt%, the composite coating showed the best early warning, self-healing and anti-corrosion performance. The warning response time was 5 min, the repair rate was 95.92 %, and the anti-corrosion performance was improved by 10 times.
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TALANTA
·
2024
·
IF 5.6
Xian Yang,Yujie Xiao,Yue Zhao,Hongping Han,Hong Zheng,Xue Zhang
In this study, Cu doped carbon dots (Cu-CDs) of uniform particle size and good water solubility was synthesized using Angelica Sinensis Radix as precursor materials through a one-step hydrothermal. The Lucigenin-(Cu-CDs) chemiluminescence sensor allows the simultaneous determination of o -toluenesulfonamide (TFA) and sulfamethoxazole (STZ) concentrations. Under optimal conditions, the sensor demonstrates the capability to detect TFA and STZ within the ranges of 50 μM–800 μM and 15 μM–120 μM, respectively. The limits of detection (LOD) for TFA and STZ are determined as 0.09 μM and 0.05 μM, respectively. While the limits of quantification (LOQ) are established at 0.3 μM and 0.17 μM, respectively. The feasibility of the method for determining TFA and STZ content in chicken samples was substantiated, demonstrating spiked recovery rates ranging from 97.5% to 102.3 % and 97.5%–99.8 %, respectively. The possible reaction mechanism was clarified based on chemiluminescence, UV–vis measurement and free radical analysis results. The newly established system is characterized by stability, convenience, and robust anti-interference capabilities, thus expanding the application of carbon dots and offering a promising strategy for the detection of TFA and STZ.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
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IF 2.7
Yuancheng He,Zhimeng Shen,Shujun Zhang,Gaobo Chang,Cheng Huang,Zhong Li,Hanqing Zhao
The addition of carbon nanotubes (CNTs) and graphene (G) to nitrogen-doped carbon nanofibers (N–C/CNFs) greatly improves their performance as sodium ion battery anodes. However, there is currently limited research on whether the introduction of nanocarbon materials will affect the surface functional groups, defects, and material structure. Herein, the classical G and CNT were introduced into the N–C/CNFs. And the addition of G promotes the transformation of nitrogen-containing functional groups (NFGs), resulting in a substantial pore structure and an enlarged interlayer distance, which enhances the macroscopic electrochemical performance significantly. The nitrogen-doped graphene/carbon composite nanofibers (N–G/CNFs) exhibit superior electrochemical performance compared to N–C/CNFs and nitrogen-doped carbon nanotube/carbon composite nanofibers (N–CNT/CNFs). After 200 cycles, the N–G/CNFs demonstrate a reversible capacity of 295 mA h g−1 at 0.05 A g−1, significantly higher than the capacities of N–C/CNFs (193 mA h g−1) and N–CNT/CNFs (237 mA h g−1). The Na3V2(PO4)3@C//N–G/CNFs exhibit promising energy and power densities.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Wang Dawei,Lin Fangxu,Luo Heng,Zhou Jinhui,Zhang Wenshu,Li Lu,Wei Yi,Zhang Qinghua,Gu Lin,Wang Yanfei,Luo Mingchuan,Lv Fan,Guo Shaojun
Using metal oxides to disperse iridium (Ir) in the anode layer proves effective for lowering Ir loading in proton exchange membrane water electrolyzers (PEMWE). However, the reported low-Ir-based catalysts still suffer from unsatisfying electrolytic efficiency and durability under practical industrial working conditions, mainly due to insufficient catalytic activity and mass transport in the catalyst layer. Herein we report a class of porous heterogeneous nanosheet catalyst with abundant Ir-O-Mn bonds, achieving a notable mass activity of 4 A mg Ir −1 for oxygen evolution reaction at an overpotential of 300 mV, which is 150.6 times higher than that of commercial IrO 2 . Ir-O-Mn bonds are unraveled to serve as efficient charge-transfer channels between in-situ electrochemically-formed IrO x clusters and MnO x matrix, fostering the generation and stabilization of highly active Ir 3+ species. Notably, Ir/MnO x -based PEMWE demonstrates comparable performance under 10-fold lower Ir loading (0.2 mg Ir cm −2 ), taking a low cell voltage of 1.63 V to deliver 1 A cm −2 for over 300 h, which positions it among the elite of low Ir-based PEMWEs.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Xiang Jincheng,Zhang Zhengxin,Li Xiang,Yang Li,Guo Shenghui,Xia Yi
The detection of nitrogen dioxide (NO₂) at room temperature is crucial for environmental monitoring and public health, but achieving high sensitivity and selectivity remains a challenge. In this study, we developed an In₂O₃/MoS₂ gas sensor via the electrostatic self-assembly method for NO₂ sensing. Owing to the addition of MoS 2 , the composite sensitive materials obtained an increased the specific surface area and improved charge transfer ability. Therefore, the In₂O₃/MoS₂ compsites exhibited enhanced NO₂ sensing performance compared to the pure In₂O₃ nanoparticles.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Hao Wu,Peng-rui Du,Xiao-ran Miao,Rui-quan Hou,Sheng-nan Li,Muhammad Zeeshan,Jin-cheng Liu,Su-qing Huang,Dong-mei Cheng,Han-hong Xu,Zhi-xiang Zhang
Water stress, a significant abiotic stressor, significantly hampers crop growth and yield, posing threat to food security. Despite the promising potential of nanoparticles (NPs) in enhancing plant stress tolerance, the precise mechanisms underlying the alleviation of water stress using O -Carboxymethyl chitosan nanoparticles ( O -CMC-NPs) in maize remain elusive. In this study, we synthesized O -CMC-NPs and delved into their capacity to mitigate water stress (waterlogging and drought) in maize seedlings. Structural characterization revealed spherical O -CMC-NPs with a size of approximately 200 nm. These NPs accumulated near the seed embryo and root tip, resulting in a substantial increase in fresh and dry weights. The application of O -CMC-NPs to water-stressed maize seedlings remarkedly elevated the chlorophyll content and activity of various antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and polyphenol oxidase (PPO). The malondialdehyde (MDA) content was significantly reduced compared to the untreated control. Additionally, the expression of stress-responsive genes, such as ZmSOD , ZmCAT, ZmPOD , ZmTIFY , ZmACO , ZmPYL2 , ZmNF-YC12, and ZmEREB180 , were significantly upregulated in the O -CMC-NPs treated seedlings. These findings unveil the novel role of O -CMC-NPs in enhancing plant stress tolerance, suggesting their potential application in safeguarding maize seedlings under water stress conditions and facilitating the recovery from oxidative damage.
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高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yao Feng,Shuyi Lai,Le Yang,Ralf Riedel,Zhaoju Yu
Polymer-derived porous Bi 2 WO 6 /SiC(O) nanocomposites were prepared by a simple mechanical mixing of Bi 2 WO 6 nanopowders with a polyorganocarbosilane, namely allylhydridopolycarbosilane (AHPCS), followed by pyrolysis of the resulting blend at 700 °C for 2 h. The Bi 2 WO 6 nanopowders were synthesized by the reaction between Bi(NO 3 ) 3 ·5H 2 O and Na 2 WO 4 and characterized by means of X-ray diffraction (XRD) and dynamic light scattering (DLS). The cross-linking and polymer-to-ceramic transformation of the physically blended Bi 2 WO 6 /AHPCS were determined by Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). TEM studies revealed that the final ceramic composite is comprised of Bi 2 WO 6 nanoparticles homogeneously embedded in a polymer-derived SiC(O) matrix. Nitrogen sorption isothermal analysis showed the meso-macroporous feature of resultant Bi 2 WO 6 /SiC(O) nanocomposites. Finally, the porous Bi 2 WO 6 /SiC(O) composites show a high photodegradation efficiency (ca. 90%) towards a model organic dye Rhodamine B (RhB) under UV irradiation. Therefore, the synthesized ceramic composite has to be considered as a promising candidate material for purification of water contaminated with organic dyes.
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EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2018
·Vol. 120
·期 5
·1700471
·
IF 2.2
Lingyi Liu,Zhou Jin,Min Wang,Wangyang Shen,Zhenzhou Zhu,Zhan Wang,Lianliang Liu
Natural phenolic compounds have been drawn a wide attention to replace the synthesis antioxidants due to the food safety issues, while, natural phenolic compounds are usually polyhydroxy derivatives which exhibit hydrophilic capacity, limiting their applications directly in lipid systems. In this work, olive leaf phenolics (OLP) are extracted by ultrasound from five cultivars and the optimal cultivar is chosen to prepare W/O nano-emulsions of Sacha Inchi oil (SIO, containing more than 90% polyunsaturated fatty acids). The droplet size could reach 2.15 ± 0.13 nm and remaines stable without phase separation during 30-day storage. Oxidative stabilities of SIO containing 0.02%, 0.05%, and 0.1% OLP (w/w) are evaluated by Rancimat test and accelerated storage test. The release of OLP by preparation of W/O nano-emulsions is capable of controlling the oxidative progress of SIO, by prolonging the induction time, preventing the production of primary and secondary oxidative products and also the deterioration of polyunsaturated fatty acids and tocopherols. Practical Applications : Sacha Inchi oil (SIO) contains approximately 90% of polyunsaturated fatty acids (PUFAs) associated with poor oxidative stability. Olive leaf phenolics (OLP) are considered as a great and cheap source of natural phenolic compounds. This study aimes to select the optimum source of OLP from five cultivars and to prepare a W/O nano-emulsion of OLP. By diluting the W/O nano-emulsion of OLP into SIO, effect of different concentrations OLP on the oxidative stability of SIO is evaluated through thermal oxidative stability and storage oxidative stability in an accelerated storage test. Results indicate that the capacity of OLP to retard the SIO oxidation depends on the incorporated concentration, which means that it is doable to adopt OLP, an abundant and cheap material, to improve the stability of edible oil with high PUFAs in the industry. Olive leaf phenolics are extracted and detected to prepare an efficient and stable W/O nano-emulsion; By diluting W/O nano-emulsion into Sacha Inchi oil, oxidative stability of the high content PUFAs oil is improved.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2018
·
IF 2.795
Jing Zhu,Yubo Wang,Junsu Jin,Liren Qin
The solubility of o -aminobenzamide ( o -AB) and its mixture with o -nitrobenzoic acid ( o -NBA) in subcritical 1,1,1,2-tetrafluoroethane (R134a) was measured at temperatures of 308, 318, 328 K and pressure range from 5.0 to 15.0 MPa with static method. Then the solubility of o -AB and o -NBA in subcritical R134a binary and ternary system were compared and investigated from the view of solvent density, solvent polarity, and interaction between solvent and solute. In order to evaluate the effect of co-solute on solubility of solute, enhancement factor ( EF ), separation factor ( SF ), separation efficiency ( SE ), and the solubility enhancement coefficient ( α ) were defined and calculated. In addition, empirical models, including Chrastil, A–L, K–J, S–S, and M–T models applying for binary system, with González, Sovová, M–M–T, and Z–J models applying for ternary system, are used for correlating the experimental solubility. The satisfactory correlated results were obtained with the AARD range from 2.16% to 4.75%.
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高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 30
·2401694
·
IF 27.4
Yin Zhu,Yanxu Chen,Yafei Feng,Xiangmin Meng,Jing Xia,Genqiang Zhang
Hydrazine oxidation-assisted water splitting is a critical technology to tackle the high energy consumption in large-scale H 2 production. Ru-based electrocatalysts hold promise for synergetic hydrogen reduction (HER) and hydrazine oxidation (HzOR) catalysis but are hindered by excessive superficial adsorption of reactant intermediate. Herein, this work designs Ru cluster anchoring on NiFe-LDH (denoted as Ru c /NiFe-LDH), which effectively enhances the intermediate adsorption capacity of Ru by constructing Ru─O─Ni/Fe bridges. Notably, it achieves an industrial current density of 1 A cm −2 at an unprecedentedly low voltage of 0.43 V, saving 3.94 kWh m −3 H2 in energy, and exhibits remarkable stability over 120 h at a high current density of 5 A cm −2 . Advanced characterizations and theoretical calculation reveal that the presence of Ru─O─Ni/Fe bridges widens the d-band width (W d ) of the Ru cluster, leading to a lower d-band center and higher electron occupation on antibonding orbitals, thereby facilitating moderate adsorption energy and enhanced catalytic activity of Ru.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Chunhui Yu,Jiajian Xing,Kunkun Xu,Shuo Chen
The engineering of electro-assisted adsorption reactors provides potential perspectives to cooperate electrochemical technology and adsorption process for valid elimination of emerging micropollutants in wastewater. Herein, electro-responsive adsorbent is prepared through oxygen plasma-modification of carbon nanotubes (O-CNTs), followed by molding with epoxy resin and carbonization subsequently. The surface and chemical properties of pristine and modified CNTs are characterized by TEM imaging, XPS analysis, Raman, and FTIR spectroscopy , which indicate the successful introduction of oxygen-containing functional groups on CNTs. The electrically enhanced adsorption performance of organic pollutants on O-CNTs is investigated under different external electric potentials, electrolyte concentrations, and pH values. At the applied potential of +0.6 V, the adsorption capacitive of O-CNTs for aniline and phenol are boosted by 2.6 and 3.3 times than that under open circuit (OC) condition, which has an excellent electro-adsorption capacity of 42.12 mg/g for phenol and 41.58 mg/g for aniline, respectively. The adsorption mechanisms of aniline and phenol on pristine CNTs and O-CNTs are evaluated through the modeling fitting of adsorption behavior. The π-π interaction is supposed to be enhanced between the π-electrons of the oxygen-free Lewis basic sites on the graphite layer of O-CNTs and the free electrons on the aromatic rings of the aniline and phenol molecules. This work provides a practical synthetization of electro-responsive O-CNTs adsorbent through plasma technology and the corresponding electrically-enhanced elimination process of micropollutants. More significantly, this finding offers an electro-regulation strategy for CNT-based adsorption material to achieve both high adsorption capacity and high efficiency in contaminated-water treatment.
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危险品化学品经营许可证（带存储）