CARBOHYDRATE POLYMERS
·
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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Aging-US
·
2024
·
IF 3.9
Xiao-Xiao Jiang,Ri Zhang,Hui-Shan Wang
Background: Atrial fibrillation (AF) is often associated with atrial fibrosis and oxidative stress. Neferine, a bisbenzylisoquinoline alkaloid, has been reported to exert an antiarrhythmic effect. However, its impact on Angiotensin II (Ang II) infusion-induced AF and the underlying mechanism remains unclear. This study aimed to investigate whether neferine alleviates Ang II-induced AF and explore the underlying mechanisms. Methods: Mice subjected to Ang II infusion to induce AF were concurrently treated with neferine or saline. AF incidence, myocardial cell size, fibrosis, and oxidative stress were then examined. Results: Neferine treatment inhibited Ang II-induced AF, atrial size augmentation, and atrial fibrosis. Additionally, we observed that Ang II increased reactive oxygen species (ROS) generation, induced mitochondrial membrane potential depolarization, and reduced glutathione (GSH) and superoxide dismutase (SOD) levels, which were reversed to some extent by neferine. Mechanistically, neferine activated the Nrf2/HO-1 signaling pathway and inhibited TGF-β/p-Smad2/3 in Ang II-infused atria. Zinc Protoporphyrin (ZnPP), an HO-1 inhibitor, reduced the anti-oxidative effect of neferine to some extent and subsequently abolished the beneficial effect of neferine on Ang II-induced AF. Conclusions: These findings provide hitherto undocumented evidence that the protective role of neferine in Ang II-induced AF is dependent on HO-1.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shaojie Zhang,Renjie Gao,Baocong Ding,Junhao Li,Tanggan Wang,Jiaheng Chen,Chong Li,Yukun Jiao,Lijun Song
Combining selenium nanoparticles (SeNPs) with bioactive polysaccharides is one of the effective ways to overcome the shortcomings of SeNPs and polysaccharide and obtain novel antitumor drug candidates. In this study, a heteropolysaccharide (MTP70) with moderate antihepatoma activity was isolated from the stems of Marsdenia tenacissima (Roxb.) Wight et Arn. To further improve the antihepatoma activity of MTP70 and the application of SeNPs, a novel stable nanoparticle (MTP-SeNP) was designed and fabricated. MTP-SeNPs (Se content of 8.25 %) were characterized as monodisperse spherical nanoparticles (50 nm) with MTP70 wrapped on the surface of the SeNPs by the formation of C O⋯Se bonds and possessed high stability and good dispersion in water for almost a month. In addition, MTP-SeNPs showed higher inhibitory effect compared with MTP70. MTP-SeNPs could effectively inhibit the proliferation, invasion, and metastasis of HePG2 cells by inducing apoptosis and arresting the cell cycle at the S phase, which were closely related to the activation of the Bax/Bcl-2/Caspases and p-21/Akt/Cyclin A2 signaling pathways. Our results provide a theoretical basis for further development and application of M. tenacissima polysaccharide, and show that MTP-SeNPs could be explored as a promising anti-hepatoma agent in the pharmaceutical and biomedical industries.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Shenjie Li,Tianyong Zha,Qiang Wang,Chengyu Wang,Yujiao Ren,Yanyan Chen,Daocheng Pan
We present a facile route for the fabrication of P-type Cu x S transparent and conducting thin films (TCTFs) using copper (I) oxide and butyl-dithiocarbamic acid as precursors by pulling method on glass. The as-deposited highly conductive crystalline Cu x S films showed high carrier concentration (∼3.11 × 10 22 cm −3 ), low electrical resistivity (∼1.02 × 10 −4 Ω cm) and conclusive p-type conduction. X-ray diffraction studies showed high crystallinity, and the optical transmission spectra in UV–vis–NIR region of such films were recorded, indicating that the transparency was over 75% with a band gap of 1.52 eV. The room-temperature sheet resistance increased from 9.9 to 302.4 Ω sq −1 with increasing baking temperature. The Cu x S/quantum dot bifacial thin films have been fabricated, and the experimental results indicated that luminescent, transparent, and conductive Cu x S/Cu-doped Zn y Cd 1-y S thin films have a very high potential application in thin film solar cells.
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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 SURFACE SCIENCE
·
2025
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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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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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Journal of Semiconductors
·
2024
·Vol. 45
·期 3
·032703
·
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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ANALYTICA CHIMICA ACTA
·
2012
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IF 4.555
Fangxin Hu,Shihong Chen,Chengyan Wang,Ruo Yuan,Dehua Yuan,Cun Wang
In this paper, the reduced graphene oxide and multiwall carbon nanotubes hybrid materials (RGO–MWNTs) were prepared and a strategy for detecting environmental contaminations was proposed on the basis of RGO–MWNTs modified electrode. The hybrid materials were characterized by the scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and N 2 sorption–desorption isotherms. Due to the excellent catalytic activity, enhanced electrical conductivity and high surface area of the RGO–MWNTs, the simultaneous measurement of hydroquinone (HQ), catechol (CC), p-cresol (PC) and nitrite (NO 2 − ) with four well-separate peaks was achieved at the RGO–MWNTs modified electrode. The linear response ranges for HQ, CC, PC and NO 2 − were 8.0–391.0 μM, 5.5–540.0 μM, 5.0–430.0 μM and 75.0–6060.0 μM, correspondingly, and the detection limits (S/N = 3) were 2.6 μM, 1.8 μM, 1.6 μM and 25.0 μM, respectively. The outstanding film forming ability of RGO–MWNTs hybrid materials endowed the modified electrode enhanced stability. Furthermore, the fabricated sensor was applied for the simultaneous determination of HQ, CC, PC and NO 2 − in the river water sample.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yafeng Jin,Ruilong Zhang,Xinyue Song,Didi Tong,Haibo Shang,Fangming Han,Xiaobo Li,Guangri Xu
Elevated levels of methylglyoxal (MG) in the human body are linked to various metabolic disorders. Therefore, developing efficient methods for detecting MG in food and biological fluid is of significant importance. In this work, a high-catalytic-activity conductive copper-based metal–organic framework (Cu 3 (HHTP) 2 ) was synthesized via a hydrothermal method, and a sensitive electrochemical sensor based on a glassy carbon electrode (GCE), denoted as Super-P/Cu 3 (HHTP) 2 /GCE, for monitoring methylglyoxal (MG) was constructed using a composite of Cu 3 (HHTP) 2 and carbon black Super-P. Leveraging the catalytic activity of Cu 3 (HHTP) 2 and the enhanced conductivity provided by Super-P, the sensor demonstrated a wide linear detection range (1–500 µM) and a low detection limit (0.0275 µM). Moreover, it was successfully applied to the determination of MG in milk, beer, urine, and human serum samples, achieving recoveries ranging from 91.7 % to 115.7 %. This work opens up new avenues for the development of innovative electroanalytical tools for MG monitoring in both food and biological fluid.
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