CARBOHYDRATE POLYMERS
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2024
·
IF 10.7
Xiuqin Fang,Chang Wang,Hong-Hui Shu,Sheng-Li Han,Cheng-Mei Liu
Bisphenol A (BPA), a prominent endocrine-disrupting compound, has garnered considerable attention due to its urgent need for rapid removal from water. Herein, we first used a novel reactive phosphine oxide containing tertiary amines as crosslinker to prepare water-insoluble crosslinked β-cyclodextrin (β-CD) adsorbent via radical-mediated thiol–ene polymerization. Owing to the synergistic hydrogen-bond (H-bond) interactions of functional groups (tertiary amine and P O groups) toward BPA, the resulted adsorbents showed fast adsorption kinetics to BPA with an adsorption equilibrium time of 5 min. After six adsorption–desorption cycles, the removal efficiency of BPA was 92.5 %, indicating its excellent reusability. Due to the presence of the C S bonds, the β-CD -derived bio-adsorbents offered binding sites for Cu 2+ ions, resulting in a maximum adsorption capacity of 113.89 mg g −1 .
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高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Yuxiu Gong,Bei Zhao,Ning Wang,Shuaihua Jiang,Haibin Yu,Peng Liang,Tiantian Jiao,Bu Xu,Xing Fan,Guoming Zhao
The catalytic hydrogenation of aromatic nitro compounds under mild conditions to generate amino compounds is a great challenge in terms of conversion, selectivity and stability. In this paper, two classes of nitrogen-doped carbon coated nickel nanoparticles, coined Ni@NC-P and displaced Ni@NC-T were prepared by high-temperature pyrolysis of MOFs using inexpensive terephthalic acid and high-priced trimesic acid as carbon source, respectively. One from the former class, namely the Ni@NC-P-500 catalyst, exhibits the best catalytic performance, which is superior to Ni@NC-T-500 Samples. For the selective hydrogenation of p -nitrophenol under mild conditions (60 °C, 2 h), the Ni@NC-P-500 catalyst shows >99.9 % conversion of p -nitrophenol and >99.9 % selectivity for p -aminophenol and can be recycled five times without obvious decrease of conversion and selectivity, thanks to its larger specific surface area (382.02 m 2 ·g −1 ), smaller nickel particle size (8.2 nm), higher nitrogen content (especially pyridine nitrogen), higher electron-rich nickel content and less hydrophilic properties than that of the Ni@NC-T-500. The excellent stability and recyclability of the catalysts are mainly attributed to their core–shell structure, i.e., zero-valent nickel nanoparticles encapsulated within a nitrogen-doped carbon layer with an appropriate microporous structure, whereas zero-valent nickel nanoparticles have the ability to activate dihydrogen and block dioxygen.
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Small
·
2024
·
IF 13
Aizhu Chen,Xuhui Yang,Lijuan Shen,Ying Zheng,Min-Quan Yang
Loading cocatalysts onto semiconductors is one of the most popular strategies to inhibit charge recombination, but the efficiency is generally hindered by the localized built-in electric field and the weakly connected interface. Here, this work designs and synthesizes a 1D P-doped CdS nanowire/Ni 2 P heterojunction with gradient doped P to address the challenges. In the composite, the gradient P doping not only creates a funneled bandgap structure with a built-in electric field oriented from the bulk of P-CdS to the surface, but also facilitates the formation of a tightly connected interface using the co-shared P element. Consequently, the photogenerated charge carriers are enabled to be pumped from inside to surface of the P-CdS and then smoothly across the interface to the Ni 2 P. The as-obtained P-CdS/Ni 2 P displays high visible-light-driven H 2 evolution rate of ≈8265 µmol g −1 h −1 , which is 336 times and 120 times as that of CdS and P-CdS, respectively. This work is anticipated to inspire more research attention for designing new gradient-doped semiconductor/cocatalyst heterojunction photocatalysts with bridged interface for efficient solar energy conversion.
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American Journal of Translational Research
·
2016
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IF 3.146
Junhui Yuan,Kuang Ge,Junhuan Mu,Jiang Rong,Li Zhang,Bin Wang,Jingyuan Wan,Gong Xia
Ferulic acid (FA), a phenolic acid which is abundant in vegetables and fruits, has been reported to exert anti-oxidative and anti-inflammatory activities. In the present study, the pharmacological effects and the underlying mechanisms of FA in mice with acetaminophen-induced hepatotoxicity were investigated. Our results revealed that FA pretreatment inhibited the augments of serum aminotransferases in a dose-dependent manner and attenuated the hepatic histopathological abnormalities and hepatocellular apoptosis in acetaminophen (APAP) exposed mice. Moreover, FA inhibited the expression of cytochrome P450 2E1 (CYP2E1), enhanced the activities of superoxide dismutase (SOD) and catalase (CAT) as well as the contents of glutathione (GSH). Furthermore, FA markedly attenuated acetaminophen-induced serum tumor necrosis factor (TNF)-α and interleukin (IL)-1β production, suppressed Toll-like receptor (TLR) 4 expression and dampened p38 mitogen-activated (MAPK) and nuclear factor kappa (NF-κB) activation. These data suggested that FA could effectively protect against APAP-induced liver injury by down-regulated expression of CYP 2E1 and the suppression of TLR4-mediated inflammatory responses.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
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IF 3.571
Yajing Fang,Mengmeng Xia,Fuqiang Liang,Weiwei Cao,Siyi Pan,Xiaoyun Xu
This study was aimed to determine the mechanism for flavonoid poor absorption related to P-glycoprotein (P-gp). The cellular uptake (CU) of 40 flavonoids was investigated in P-gp overexpressing KB/multidrug-resistant (MDR) cells. A total of 9 flavonoids, including 5,7,3′,4′-tetramethoxyflavone, with a significant (p < 0.05) CUKBE (2.90 ± 0.146 μmol/g) higher than CUKBP (1.57 ± 0.129 μmol/g) were identified as P-gp substrates. Besides, 8 substrates, including tangeretin, showed a significant (p < 0.05) CUKB (9.72 ± 1.09 μmol/g) higher than its CUKBP (7.36 ± 0.692 μmol/g). A total of 7 of 17 flavonoid substrates stimulated the P-gp efflux of rhodamine 123, and most substrates increased P-gp expression in KB/MDR cells. Docking analyses showed a good correlation (R = 0.764; p < 0.01) between efflux fold and S_scoring of flavonoids to the P-gp model, indicating consistency between in silico and in vitro results. A structure–affinity relationship exhibited that 3-OH, 5-OH, 3′-OCH3, and 4′-OCH3 are crucial for flavonoids binding to P-gp. These results provide valuable information for finding a solution to improve the absorption of flavonoids.
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Journal of Semiconductors
·
2024
·Vol. 45
·期 3
·032703
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IF 4.8
Xinfa Zhu,Weishuai Duan,Xiancheng Meng,Xiyu Jia,Yonghui Zhang,Pengyu Zhou,Mengjun Wang,Hongxing Zheng,Chao Fan
The emergent two-dimensional (2D) material, tin diselenide (SnSe2), has garnered significant consideration for its potential in image capturing systems, optical communication, and optoelectronic memory. Nevertheless, SnSe2-based photodetection faces obstacles, including slow response speed and low normalized detectivity. In this work, photodetectors based on SnS/SnSe2 and SnSe/SnSe2 p−n heterostructures have been implemented through a polydimethylsiloxane (PDMS)−assisted transfer method. These photodetectors demonstrate broad-spectrum photoresponse within the 405 to 850 nm wavelength range. The photodetector based on the SnS/SnSe2 heterostructure exhibits a significant responsivity of 4.99 × 103 AW−1, normalized detectivity of 5.80 × 1012 cmHz1/2W−1, and fast response time of 3.13 ms, respectively, owing to the built-in electric field. Meanwhile, the highest values of responsivity, normalized detectivity, and response time for the photodetector based on the SnSe/SnSe2 heterostructure are 5.91 × 103 AW−1, 7.03 × 1012 cmHz1/2W−1, and 4.74 ms, respectively. And their photodetection performances transcend those of photodetectors based on individual SnSe2, SnS, SnSe, and other commonly used 2D materials. Our work has demonstrated an effective strategy to improve the performance of SnSe2-based photodetectors and paves the way for their future commercialization.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jixu Zhang,Liang Mao,Aihua Yan,Fei Huang,Nan Li,Zigao Su,Huaqi Yuan,Bolei Hui,Heng Wang
The sluggish charge-carrier kinetics for conventional photocatalysts severely limit the photogenerated charge utilization and result in unfavorable hydrogen evolution efficiency. To address these challenges, CoS/S v -ZnIn 2 S 4 /Ni(OH) 2 photocatalysts, containing sulfur vacancy, p-n-type heterojunction and Ohmic contact, were successfully constructed via an in-situ technique. Defect-mediated enrichment of photogenerated electrons at sulfur vacancies achieved fast charge transfer and inhibited the carrier recombination. The interfacial electric field (IEF) due to p-n-type heterojunction enhanced the carrier separation and transfer. Ohmic contact rapidly extracted the photogenerated charges and accelerated the hydrogen reduction reaction dynamics. As expected, CoS/S v -ZnIn 2 S 4 /Ni(OH) 2 catalysts reached an impressive hydrogen evolution rate of 19.45 mmol g −1 h −1 , which was 8.61 times higher than that of pure ZIS. This work demonstrates that the synergistic effect between sulfur vacancies and IEF effects may establish a new paradigm for designing high-efficiency multi-component sulfide-based photocatalysts.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Guanhua Zhang,Mingwang Lu,Qitong Sheng,Guangjian Xing,Xiaojing Yang,Xiaofei Yu,Xinghua Zhang,Zunming Lu,Lanlan Li
The development of highly efficient and stable bifunctional electrocatalysts capable of simultaneously catalyzing the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is critical for advancing zinc-air batteries (ZABs). However, the linear scaling relationship (LSR) governing the adsorption energies of oxygen species imposes constraints on the concurrent enhancement of ORR and OER performance. In this study, we report the synthesis of a novel FeSn/NC catalyst that exhibits strong p-d orbital hybridization by incorporating p-block Sn metal into d-block Fe metal. This strategy facilitates the manipulation of the d-band center and enables the effective formation of low-spin (LS) Fe 3+ simultaneously. The regulation of the d-band center is identified as an effective strategy to enhance the adsorption energy of OOH* and OH* intermediates, while the LS Fe 3+ configuration can effectively weaken the adsorption strength of the O* intermediate. Consequently, this p-d hybridized Fe-based catalyst successfully overcomes the constraints imposed by LSR, thereby boosting bifunctional activity for both ORR and OER. The synthesized FeSn/NC catalyst demonstrates exceptional bifunctional performance with a potential difference (ΔE) of 0.65 V between ORR and OER activities. Furthermore, ZAB based on FeSn/NC achieves an impressive peak power density of 186.0 mW cm −2 , while maintaining stable operation over 700 h during cycling tests. This work offers new insights into designing high-performance bifunctional electrocatalysts through strategies involving synergistic modulation of d-band center and spin state.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Chunhong Zhang,Zhijie Qi,Zizheng Ma,Yuning Gong,Han Feng,Junbo Zang,Weifeng Du,Lei Shang
Commercial epoxy resins are significantly limited in their applications in structural materials, packaging materials, and other fields due to inherent drawbacks such as the non-renewability of synthetic raw materials, high brittleness, and flammability. During the modification process, challenges related to the compatibility of additives and the “see-saw” issue between mechanical performance and flame retardancy persistently arise. This study presents the first synthesis of sustainable flame-retardant epoxy resins (p-CAIE) using biomass-derived p-coumaric acid (p-CA) and isophorone diisocyanate (IPDI) as raw materials. p-CAIE is utilized as a modifier for commercial epoxy resins, resulting in thermosetting materials (p-CAIE-E51/DDM) with excellent thermal stability, superior mechanical properties, and enhanced flame retardancy. The compatibility between the components is significantly improved, and the introduction of extensive hydrogen bonding within the crosslinked network leads to remarkable enhancements in performance. Specifically, the tensile strength and elongation at break of the 15 % p-CAIE-E51/DDM cured resin system increased by 119 % and 360 %, respectively, while the impact strength improved by 151 % compared to pure E51/DDM. The limiting oxygen index (LOI) reached 29.5 %, and the UL-94 test achieved a V-0 rating. Additionally, the peak heat release rate (PHRR), total heat release (THR), total smoke production (TSP), and carbon monoxide production (COP) were reduced by 54.2 %, 55.5 %, 53.6 %, and 40.5 %, respectively, effectively suppressing thermal and smoke release. The material also exhibited high transparency within the visible light range (400 nm-760 nm). Thus, this research provides an environmentally friendly strategy for the multifunctional manufacturing of bio-based epoxy resins, offering a promising solution for simultaneously enhancing the flame retardancy, toughness, and transparency of thermosetting epoxy materials.
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LANGMUIR
·
2024
·
IF 3.7
MengYao Lai,YaChao Wang,Fan Li,JiangPing Zhao
Through the substitution reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and sodium lignosulfonate (LS), a novel phosphorus-containing sodium lignosulfonate (DAL) was successfully synthesized via the solvothermal method and used as a multifunctional flame retardant to prepare a novel silicone-acrylic emulsion (SAE) composite Si–P–C coating. The structure of DAL was determined by X-ray diffraction (XRD), attenuated total reflection infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and nuclear magnetic resonance (solid-state 13C NMR and 31P NMR). The results demonstrated that incorporating an appropriate dosage of DAL (0.9 g, 1.5 wt %) into SAE-based composite coatings enhances flame retardancy and reduces heat release and smoke production during burning. The peak heat release rate (p-HRR) decreases from 236.7 to 120.3 kW·m–2, total smoke production (TSP) decreases by 71.1%, and the flame-retardant index increases from 1.00 to 4.58. Meanwhile, the coating is transformed into a dense and nonflammable vitreous polyphosphate barrier layer during the firing process to prevent heat or mass transfer. Furthermore, the pyrolysis kinetics identify that the 3D Z–L–T model governs the coatings’ pyrolysis, and the appropriate DAL makes the pyrolysis Eα climb from 300.98 to 331.30 kJ·mol–1 at 358–439 °C. Hence, this study presents a new synthesis method of multifunctional flame retardant DAL, studies the excellent properties and cross-linking mechanism of DAL-doped SAE-composite Si–P–C coatings, and explores a halogen-free, low-carbon, and clean eco-technology strategy.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Mingqiang Chen,Longyang Li,Yishuang Wang,Defang Liang,Zinan Zhou,Haosheng Xin,Chang Li,Gang Yuan,Jun Wang
Converting cellulose (Cel) into ethyl levulinate (EL) is one of the promising strategies for supplying liquid fuels. In this paper, the prepared sulfonated P-W-modified N-containing carbon-based solid acid catalyst (PWNCS), in which the Polyaniline (PANI) was employed as N and C precursors, successfully converted Cel into EL under the water-ethanol medium. The characterization results demonstrated that a tiny addition of P increased the Brønsted acid sites (BAS) content and defective WO 3 provided the Lewis acid sites (LAS), meanwhile, the sulfonation process did not change the fundamental structure but introduced the sulfonic groups to dramatically increase the acidic content. Therefore, under optimized reaction conditions, PWNCS realized about 100% Cel conversion and 71.61% of EL yield, furthermore, the selectivity of EL reached 89.14%. In addition, the effect of water on the reaction pathway of Cel to EL over PWNCS was proposed. The addition of water generally resulted in the hydration of defective WO 3 to reduce the LAS and increase BAS, which significantly inhibited the side reactions of retro-aldol condensation (RAC) and subsequent etherification reactions during Cel conversion and then improved the selectivity of EL.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yong Yang,Jianfeng Jiang,Ya-Nan Feng,Zanyong Zhuang,Fei-Fei Chen,Dantong Zhang,Yan Yu
The strong CO 2 adsorption and facile CO desorption are a trade-off issue for CO 2 -to-CO photoreduction pathways. Synchronous optimization of these two steps remains a substantial hurdle and has been less explored. Herein, an O/N mixed coordinated Co-NTA (NTA: nitrilotriacetic acid), featuring an ultralong nanofiber architecture, is reported for efficient CO 2 photoreduction. The mixed coordination can regulate the positions of d -band center of Co sites and also d – p orbital coupling with coordination atoms, which are recognized as main activity descriptors. Consequently, free energies of both steps of CO 2 →*CO 2 and *CO→CO are well optimized, making the CO 2 -to-CO photoreduction pathways more favorable thermodynamically. By contrast, the classic N-coordinated Co-MeIm (MeIm: 2-methylimidazole) and O-coordinated Co-BDC (BDC: 1,4-benzenedicarboxylic acid) suffer from unfavorable CO 2 adsorption and intractable CO desorption, respectively. In addition, achiral NTA molecules can direct the growth of Co-NTA into one-dimensional (1D) nanofibers, while Co-BDC and Co-MeIm possess typical 2D nanosheet and 3D polyhedron architectures. The fast electron transport along the axis directions makes charge-transfer kinetics most efficient over 1D Co-NTA. The thermodynamic and kinetic benefits jointly contribute to the 1.8-fold increase in CO production over 1D Co-NTA.
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