INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Deng Zhao,Fei Wang,Qingxin Li,Wenming Han,Huashan Wang,Hua Liu,Suning Li,Hui Liu,Shuai Guo,Yonghong Yan
It is well known that AAEMs (alkali and alkaline earth metals) and TMs (transition metals) have different catalytic mechanisms for the cellulose pyrolysis. There is potential for synergy among different metals during the pyrolysis. This study mainly used in-situ DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy) to comprehensively study the catalytic mechanism of different metals (Na, Ca, Fe, Co, and Ni) during cellulose pyrolysis. The mechanism of synergistic interaction between different metals was explained according to the catalytic characteristics of different metals. The results showed that different metals had different effects on the activation pathway. Na and Ca retained a part of O in the char, thereby inhibiting the graphitization process, while Fe, Co, and Ni tended to interact directly with the carbon structure to enhance its stability. When binary metals co-catalyzed, Na and Ca showed a competitive mechanism for combining with O, while the cooperation of Na and Fe accelerated the depolymerization of cellulose. In this study, the proposed improved in-situ diffuse reflection infrared reaction chamber with more accurate temperature control could become a solid foundation for studying the catalytic properties of different single in the pyrolysis of cellulose.
研究领域:
能源科学
·
催化化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2019
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IF 7.015
Hui Wang,Sihan Tang,Yunxia Ni,Chongrui Zhang,Xiangwei Zhu,Qiang Zhao
Interface compatibility between hydrophilic metal-organic frameworks (MOFs) and hydrophobic polydimethylsiloxane (PDMS) is less effectively reconciled through supramolecular modifications such as surfactant and polymer wrapping. Here we report a covalent cross-linking strategy to strengthen MOFs ~ PDMS interfaces. Zirconium MOFs (UiO-66-NH 2 ) were modified with trimethoxysilan (TMS), which could further react with silanol terminated PDMS to enhance UiO-66 ~ PDMS interface compatibility. High content UiO-66-TMS (up to 50 wt%) were loaded into PDMS while retaining good membrane formation ability, mechanical properties and pervaporation selectivity, in contrast to pristine UiO-66-NH 2 that decreases membrane strength and separation performances even at much lower loading content (10 wt%). Flux of mixed matrix membranes in dehydrating ethanol-water mixtures was highly improved while retaining the selectivity. It allows for the efficient production of concentrated ethanol (equivalent flux: 2234 g/m 2 h; ethanol in permeate: 53 wt%) from dilute feed through two-times consecutive pervaporation at 40 °C. Moreover, the membrane with covalently enhanced interfaces exhibit stable performance during 100 h continuous operation.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2018
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IF 2.955
Dan Shang,Xiaoying Sun,Xiaoyao Shen,Jianzhong Hang,Lujiang Jin,Liyi Shi
Amphiphilic xerogel films with slight swelling were prepared by the acid-catalysed sol-gel method starting from tetraethoxysilane (TEOS), triethoxyoctylsilane (C8Si), n -octadecyl trimethoxysilane (C18Si) and poly(ethylene glycol) siloxane (PEG-TMS). In these amphiphilic xerogel films, the presence of hydrophobic chains, especially C18Si facilitated the emigration of PEG chain to the coating/air interface during the film formation/curing process, and then the PEG chains enriched at the surface of coatings further slightly emigrated to form hydration layer underwater confirmed by energy dispersive X-ray spectroscopic (EDS) analysis, captive air-bubble contact angle (CA) and CA hysteresis. Furthermore, the amphiphilic xerogel films showed the optimal water absorption ratio lower than 1.0% due to the restraint of higher crosslinked density and little network aperture of the films on PEG chains. The antifouling performances of amphiphilic xerogel films included the protein resistance for FITC-BSA, antibacterial property for Escherichia coli and the resistance for diatom Navicula , were better than those of the elastic silicone-based coatings and xerogel film without hydrophilic PEG chains. In general, the amphiphilic xerogel films containing both PEG and proper levels of C8Si and C18Si possessed excellent fouling release properties and slight swelling due to the synergistic effects.
研究领域:
材料科学
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生物医学工程
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海洋生物学
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DOI
高影响因子
Inorganics
·
2026
·Vol. 14
·期 7
·186
·
IF 3.4
Yao Lv,Jianfeng Yu,Liqiu Shi,Shifei Huang
Ni-rich layered oxide LiNi0.91Co0.06Al0.03O2(NCA91) with high specific capacity has emerged as a leading cathode candidate for advanced lithium-ion batteries (LIBs). Nevertheless, increase in Ni content triggers structural instability and fast capacity degradation, which severely impedes the practical application of Ni-rich materials. Herein, a comprehensive study is conducted to explore the structural evolution and electrochemical behaviors of NCA91 cathodes with precisely tuned Li/TMs (transition metals) molar ratios spanning from 1.01 to 1.07. Results reveal that the NCA91 electrode with an optimal Li/TMs ratio of 1.03 exhibits outstanding structural integrity, coupled with remarkable cycling durability and rate capability. Specifically, the cathode with Li/TMs = 1.03 retains 88% of its initial capacity after 100 cycles at 1 C, and maintains ~130 mAh g−1even at 10 C. This work establishes a quantitative structure–composition–performance correlation that offers critical design principles for developing ultrahigh-nickel cathode materials.
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DOI
高影响因子
MICROCHIMICA ACTA
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2026
·Vol. 193
·期 7
·462
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IF 5.4
Zhao Yunfei,Fang Jiale,Zhang Baofeng,Wang Yan,Wu Lianbin,Pan Qinghua,Zhou Ziyun,Jiang Kezhi
A superhydrophobic magnetic nanomaterial, Fe 3 O 4 @C16&TMS, was synthesized by hexadecylating the surface of the Fe₃O₄ nanoparticles and sealing the residual hydroxyl groups. The nanomaterial exhibits a high specific surface area of 45.3 m²/g, and superhydrophobicity with a water contact angle of 158.11°. The high specific surface area offers numerous adsorption sites, and the superhydrophobic characteristics of the synthesized nanomaterial can selectively enrich non-polar volatile methylsiloxanes (VMSs) through hydrophobic interactions, thereby significantly enhancing extraction efficiency and reducing matrix interference. Notably, no significant decline in performance was observed after 6 consecutive reuse cycles. Based on this material, a rapid and simple method for the determination of VMSs in water was developed using magnetic solid-phase extraction (MSPE) coupled with gas chromatography-mass spectrometry (GC-MS) analysis. The method enabled effective extraction of VMSs from water within 20 min, achieving recoveries ranging from 70.4% to 117.0%. The method limit of quantitation (LOQ) was 0.004 ng/mL, with intra-day precision (RSD) ranging from 0.9% to 3.9%. Analysis of real water samples revealed contamination in all 16 selected water bodies, with five specific VMSs species detected at concentrations ranging from 0.01 to 0.52 ng/mL. In summary, the proposed method enabled rapid and simple determination of VMSs in water samples, demonstrating significant potential for environmental analysis applications. Graphical abstract The alternative text for this image may have been generated using AI.
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Y. Hong,J. Wang,J. Li,Z. Xu,X. Yang,M. Bai,P. Gong,Y. Xie,X. Zhang,P. Xu,X. Chen,R. Li,X. Liu,G. Ruan,G. Xu
Nanoparticles have great potential in remote neural stimulation with physical fields, but translation of these approaches to the medical arena faces enormous challenges, especially due to the use of highly invasive brain delivery of nanoparticles. Here we explore an alternative strategy through employing non-invasive brain delivery of nanoparticles. Non-invasive brain delivery of superparamagnetic iron oxide nanoparticles (SPIONs) in rats is performed by combining several complementary methods. The thus-delivered nanoparticles (called Tat-SPIONs) are found to enhance the neural stimulation effects of transcranial magnetic stimulation (TMS), a clinically-used non-invasive brain stimulation device, as analyzed by electrophysiological, biochemical, and behavioral experiments. In particular, ischemic stroke rats treated by non-invasively delivered Tat-SPIONs coupled with TMS show significant improvement in stroke recovery in terms of general health status, motor-sensory function, and cognitive function, compared to those treated by TMS alone. Importantly, mechanistic studies by experiments and numerical simulation suggest that the neural stimulation enhancement is mediated by neuroplasticity at least in part, is caused by a magnetoelectric rather than magnetothermal effect, and is generated primarily by those Tat-SPIONs associated with neurons’ plasma membranes . This further implies that the excellent membrane-binding ability of Tat peptide is crucial for SPION-enhanced TMS. Tat-SPIONs exhibit minimal toxicity and neuroinflammation, and are clearable from major organs. The presented technology platform paves the way for medical applications of nanoparticles in remote brain stimulation with physical fields for stroke as well as other neurological disorders.
研究领域:
神经科学
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纳米技术
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生物医学工程
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临床神经学
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DOI
高影响因子
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