CERAMICS INTERNATIONAL
·
2023
·Vol. 49
·期 22
·35377-35381
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IF 5.2
Yan Hao,Yibo Zhang,Biao Liu,Kuibao Zhang
Transparent spinel ceramics (MgO·nAl 2 O 3 , n = 0.9–1.2) doped with Cr 3+ ions were prepared by hot-pressed sintering in a vacuum. The effect of the composition on the microstructure, densification , and transmittance of ceramics was studied. The single phase of spinel was obtained at n ≥ 0.95, and their relative density changed insignificantly and was about 99%. As the n value increased, the Al 3+ ions were preferred to locate the tetrahedral sites in the spinel structure. At n = 1, approximately 65% of Al 3+ ions occupied the T-sites, and at n = 1.2, it increased to 77%. The occupation of Cr 3+ ions was not affected by the Al 3+ occupation, and the ratio of Cr 3+ ions in T-sites to O-sites was still about 1:1, regardless of the value of n. The transmittance of the ceramics was relatively high at 1≤n ≤ 1.1, and the transmittance in the region of 1000–6000 nm was about 74–78%.
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Progress in Natural Science-Materials International
·
2018
·Vol. 28
·期 3
·275-280
·
IF 2.572
Xin Qian,Yu Xiao,Cheng Chang,Lei Zheng,Lidong Zhao
In this paper, we report that the thermoelectric performance of n -type PbSe could be improved through synergistically optimizing electrical and thermal transport properties via Sb doping and Mg alloying. The carrier concentration was firstly optimized through Sb doping, resulting in a maximum power factor of ~ 15.4 μW cm −1 K −2 and maximum ZT of ~ 0.9 at 873 K in Pb 0.99 Sb 0.01 Se. Then, Mg was selected for alloying in Pb sites to produce point defects, which can largely intensify the phonon scattering and lower thermal conductivity. After Mg alloying, the thermal conductivity at 300 K (873 K) was significantly suppressed from ~ 4.6 Wm −1 K −1 (1.5 Wm −1 K −1 ) for Pb 0.99 Sb 0.01 Se to ~ 2.9 Wm −1 K −1 (1.1 Wm −1 K −1 ) for Pb 0.99 Sb 0.01 Se-6%MgSe. Through combining Sb doping and Mg alloying, a maximum ZT of ~ 1.1 was achieved at 873 K for Pb 0.99 Sb 0.01 Se-6%MgSe, and the average ZT ( ZT ave ) was increased by 28.6% from ~ 0.42 for Pb 0.99 Sb 0.01 Se to ~ 0.54 for Pb 0.99 Sb 0.01 Se-6%MgSe. The results indicate that PbSe is a robust candidate for medium-temperature thermoelectric applications.
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Materials Science & Engineering C-Materials for Biological Applications
·
2014
·
IF 2.736
Xiaomo Li,Hui Zhong,Xiaorong Li,Feifei Jia,Zhipeng Cheng,Lili Zhang,Jingzhou Yin,Litao An,Liping Guo
Environmentally sensitive hydrogels as one of the most potential drug delivery systems have gained considerable interest in recent years. In the present study, we synthesized a newly temperature-responsive composite hydrogel based on attapulgite (ATP) and poly (N-isopropylacrylamide) (PNIPAM) as the localized drug carriers for drug delivery. The as-prepared ATP/PNIPAM hydrogel has large aperture which significantly improved the quantity of adsorption of drugs, exhibiting the excellent properties of drug release. The scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and X-ray diffraction (XRD) were used to characterize the ATP/PNIPAM. The swelling/deswelling behaviors and the release of ciprofloxacin lactate were studied. When the temperature was below the low critical solution temperature (LCST), the swelling property of hydrogels was excellent and the swelling rate was large. And, the drug release rate increased with the increase of the content of attapulgite in the composite hydrogel when it was put in the buffer solution (pH 7.38) at 37.0 °C. Therefore, the composite hydrogels might be very useful for its application in biomedical fields.
研究领域:
材料科学
·
药物递送
·
高分子化学
·
生物医学工程
·
智能水凝胶
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MATERIALS LETTERS
·
2026
·
IF 2.6
Jing Hu,Xinliang Wang,Yingchao Zhang,Jie Zhang,Zigang Liu,Xiaoran Wang,Ziheng Wang,Qianqiu Tian,Lijun Chen
CNFs@MoS₂ heterostructure is fabricated via an electrospinning-hydrothermal route. • Interfacial C–Mo/C–S bonds enhance conductivity and thermal shock stability of MoS₂. • CNFs@MoS₂ delivers 451.4 mAh g −1 up to 1000 mA cm −2 with reduced internal resistance. Molybdenum disulfide (MoS₂) is a promising high-capacity cathode candidate for thermal batteries, yet its practical application is restricted by low intrinsic electronic conductivity and poor structural stability under severe thermal shock. Herein, a chemically-bonded heterostructure of MoS₂ nanosheets anchored on N-doped carbon nanofibers (CNFs@MoS₂) is fabricated by electrospinning combined with hydrothermal treatment, where interfacial C Mo and C S bonds are generated between MoS₂ and N-doped carbon nanofibers. The interconnected conductive network accelerates ion/electron transport and offers mechanical support, whereas the formed interfacial bonds enhance structural stability of the composite under thermal-shock conditions. Electrochemical tests demonstrate that the obtained CNFs@MoS₂ delivers a high specific capacity of 451.4 mAh g −1 under stepwise-increased current density up to 1000 mA cm −2 , with distinctly reduced internal resistance compared with MoS₂. This work offers a feasible interfacial-engineering strategy to develop high-performance cathode materials for thermal batteries.
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Nature Communications
·
2026
·
IF 18.1
Wang Yuting,Tan Khai Chen,Wen Hong,Zhou Panwang,Yu Yang,Guo Jiaquan,Sun Jinglu,Fang Chong,Guo Xin,Guo Jingwei,He Teng,Chen Ping
Organic-based luminescent materials have broad applications across illumination, display, and imaging. However, intramolecular vibrations and intermolecular interactions, such as π-π stacking, can induce non-radiative transition and lead to low efficiency and fluorescence quenching for solid-state materials, especially for small conjugated molecules. In the present study, a facile yet versatile conceptual approach to fabricate a new type of luminescent materials, i.e., alkali metal N-heteroarene salts, was developed via a metal substitution strategy. Over 30 solid-state ionic compounds have been designed and synthesized accordingly. These compounds possess rigid crystal structures through forming an ionic bonding network of metal‒N bonds and cation-π interactions, which can minimize the vibrations of individual molecules, thereby suppressing non-radiative transition. Consequently, some small conjugated molecules with negligible fluorescence, such as imidazole, indole, and azaindole, become strong emitters upon alkali metal substitution. The alkali metal substitution forms an N-heterocyclic anion owing to the Lewis acidity of the alkali metal cation, thus increasing the electron density on the conjugated system. Concurrently, the formation of N-heterocyclic anions tailors band gaps of these organic salts, enabling diverse fluorescent emissions across the visible spectrum. The applications of these organic salts in information anti-counterfeiting are also demonstrated successfully.
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PubMed
高影响因子
LIFE SCIENCES
·
2026
·
IF 6.4
Zhaoxu Qiu,Huaxing Zhang,Bo Tan,Qian Chen,Huizi Gao,Yuhan Yao,Yangxuan Peng,Hongmei Xue,Qi Guo,Danyang Tian,Lin Xiao,Xu Teng,Yanzhuo Ma,Yuming Wu,Sheng Jin
Aims The present study was aimed to investigate whether trimethylamine N-oxide (TMAO) contributed to cardiac aging and to explore the underlying mechanism. Materials and methods Male C57BL/6 J mice were randomly divided into four age groups (3, 12, 18, and 24 months) to assess the cardiac function. Markers of senescence, oxidative stress, and the protein expression of pyroptosis were also measured. To test the hypothesis that TMAO promoted cardiac aging, 8-week-old mice were intraperitoneally injected with TMAO for 1–3 months and 3,3-dimethyl-1-butanol was administered in drinking water starting from 15 months of age for three months to inhibit TMAO production. Gasdermin D (GSDMD) knockout mice were also used. Key findings Plasma TMAO levels increased with age and correlated with upregulation of cardiac senescence markers, diastolic dysfunction, cardiac fibrosis, and elevated plasma brain natriuretic peptide levels. Starting from 2 months of TMAO treatment, impairment of cardiac diastolic function and progression of cardiac fibrosis were observed alongside the upregulation of senescence marker proteins expression. Mechanistically, TMAO promoted cardiac oxidative stress and activated the NLRP3-mediated pyroptosis pathway. Genetic ablation of GSDMD abolished TMAO-associated cardiac aging. Furthermore, pharmacological inhibition of TMAO production in aged mice attenuated oxidative stress, suppressed NLRP3-mediated pyroptosis activation, and alleviated cardiac aging. Significance This study revealed that plasma TMAO levels progressively increase with age in mice and TMAO contributed to cardiac aging in a time-dependent manner through NLRP3-mediated pyroptosis driven by oxidative stress. Moreover, the inhibition of TMAO generation might offer a basis for future therapeutic strategies. Download: Download high-res image (146KB) Download: Download full-size image
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BIOMACROMOLECULES
·
2026
·
IF 5.9
Jing Zhao,Pengfei Li,Ning Li,Xiaoxiong Jin,Wei Zhang,Zihan Yan,Yue Xu,Bo Duan,Jiamin Yuan,Ziyuan Song
The development of renal-targeting delivery systems has shown great potential to improve the therapeutic efficacy to treat kidney diseases. However, current nanocarriers often exhibit poor targeting efficiency or short renal retention, limiting their use in drug delivery. Herein, we report the simplified preparation of poly(DL-serine) (PSer) bearing hydroxyl side chains, which showed enhanced accumulation in kidney in the first several hours post intravenous injection. Starting from unprotected amino acids, the hydrophilic polypeptides were prepared in a two-step synthesis without tedious protection/deprotection procedures. With the improved uptake by renal tubular epithelial cells, PSer outperformed its threonine analogue, with the kidney-to-liver ratio of up to 7.7 (∼9% injected dose in kidney). Finally, the conjugates of PSer with dexamethasone exhibited enhanced therapeutic efficacy than free drug in an animal model of acute kidney injury. We believe this work improves our understanding to design nanomedicine with enhanced kidney accumulation, boosting its use to treat renal diseases.
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ENERGY & FUELS
·
2026
·Vol. 40
·期 31
·17210-17224
·
IF 6
Xin Zhiqiang,Bie Hongfei,Zhou Xin,Xiao Rui,Wu Shiliang
The coupling of biobased oxygenated fuels with low-temperature
combustion (LTC) technologies offers a promising pathway to reduce
dependence on fossil fuels and optimize compression-ignition combustion
processes. However, a systematic understanding of how the fuel molecular
structure regulates the reactivity of blended fuels remains limited.
In this study, using n -heptane as a diesel surrogate
fuel, the low-temperature combustion characteristics of methyl caprate
(MC), dipropylene glycol dimethyl ether (DPDME), and five other ether-ester
oxygenated fuels were investigated at various blending ratios using
a cooperative fuel research (CFR) engine system. The results indicated
that blending 40% and 60% MC yielded a superior fuel modification
effect; a minor ratio of DPDME blending was advantageous for enhancing
the oxygen content of the fuel. A 20% blend of MEA or 3-MTBA exhibits
favorable heat release intensity and ignition phasing, whereas PGMEA
and EGMEA are more suitable as low-ratio oxygenated additives. All
ratios of BGA blending combusted effectively, with 20% BGA blending
exhibiting optimal performance, characterized by an elevated exothermic
intensity and favorable ignition timing. With the proper combination
of fuel additives, favorable heat-release behavior and ignition phasing
can be obtained under the present CFR/LTC conditions, indicating the
potential of selected biobased oxygenated fuels as blending components
for diesel surrogate fuels. Furthermore, this study indicated that
a minor proportion of oxygenated fuel blending can alter the fuel
oxidation conditions and in-cylinder temperature, hence enhancing
the combustion performance and benefiting the whole combustion process.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xiao Liang,Yuqing Shi,Yutong Jin,Bo Ren,Jing Zhang,Nan Gao
ND-modified ZnO microspheres are prepared hydrothermally. • ZnO@ND1% shows a response of 52.43 to 100 ppm n-butanol at 160 °C. • DFT result reveals stronger n-butanol adsorption on ZnO@ND (−1.05 eV). Selective detection of volatile organic compounds is crucial for industrial safety and environmental monitoring. In this work, nanodiamond (ND) modified ZnO composites were prepared via a facile hydrothermal method to fabricate high-performance n-butanol gas sensors. The incorporation of ND effectively regulates the microstructure of ZnO, providing a larger specific surface area and abundant active sites for gas reaction. The optimized ZnO@ND composite exhibits a prominent sensing response of 52.43 toward 100 ppm n-butanol, which is nearly twice that of pristine ZnO, meanwhile reducing the optimal operating temperature to 160 °C. The enhanced sensing performance is mainly attributed to the synergistic effects of structural optimization and interfacial electronic modulation. Specifically, the increased surface area and chemisorbed oxygen content provide more accessible adsorption and reaction sites, and the ZnO@ND heterointerfaces facilitate charge transfer and accelerate the surface redox reaction with n-butanol. Density functional theory calculations prove the increased adsorption affinity toward n-butanol on ZnO@ND. As a result, the ZnO@ND sensor demonstrates excellent selectivity, favorable concentration-dependent response behavior, and reliable stability. This work proves that ND modification is an effective method to optimize the gas-sensing properties of ZnO, which provides a feasible reference for the development of high-efficiency metal oxide gas sensors. Download: Download high-res image (139KB) Download: Download full-size image
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ACS Omega
·
2026
·
IF 5.2
Jing Zeng,Yuting Zhao,Yaxin Chen,Kun Wu,Changlei Yang,Ying Wu,Guanglong Pang,Miao Zhang,Huaixiu Wen,Zhen Wang,Xue Peng
Alzheimer’s disease (AD) is a neurodegenerative disease (NDD) characterized by complex pathogenesis and remains incurable to date. Emerging evidence has demonstrated that mitochondrial dysfunction not only serves as a central component in AD initiation but also precedes other pathological processes, thereby playing a pivotal role in both the pathogenesis and progression of AD. Previous studies have confirmed that N-salicyloyl tryptamine derivatives can regulate mitochondrial function and effectively treat NDDs. Among them, compound N2 showed the best efficacy. This study first applied compound N2 to the treatment of AD and confirmed that it exerts anti-AD effects by upregulating nuclear factor erythroid 2-related factor 2 (Nrf2) and enhancing the activity of mitochondrial complex I (MCI). The results showed that N2 improved mitochondrial dysfunction and neuro-inflammation in PC12 or BV2 cells. N2 was also shown to alleviate anxiety, cognitive impairment, neuronal damage, and amyloid-β (Aβ) pathological deposition in scopolamine-induced male Kunming mice. Mechanistic studies indicate that N2 can reverse mitochondrial damage induced by rotenone (MCI inhibitor), as evidenced by reduced ROS levels and increased ATP levels; it also upregulates Nrf2 protein expression. These findings collectively indicate that N2 is a highly valuable anti-AD mitochondrial function regulator, providing a new strategy for the efficient treatment of AD.
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PubMed
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JOURNAL OF ELECTRONIC MATERIALS
·
2026
·
IF 2.8
Yue Lei,Wan Yu,Wang Yanting,Feng Changhao
Effective detection of n -butanol is essential for human health and environmental protection. Bismuth ferrite is a gas-sensitive material candidate with excellent potential, and rare earth element doping is an effective modification strategy to enhance the gas-sensitive performances of gas sensors. In this work, a series of Y-doped BiFeO 3 nanofibers (BFO, 1% Y-BFO, 3% Y-BFO, and 5% Y-BFO) were prepared by electrospinning. Among them, the gas sensors based on 3% Y-BFO nanofibers exhibited significantly enhanced gas-sensing performances for n -butanol. At an optimum operating temperature of 150°C, the synthesized 3% Y-BFO sensor has a response of 60.2 and a response/recovery time of 9/47 s for 100 ppm n -butanol. In addition, it has a lower limit of detection as low as 0.5 ppm and excellent repeatability. Therefore, gas sensors based on Y-doped BiFeO 3 nanofibers represent a promising solution for the efficient detection of n -butanol.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Heli Cheng,Bingzhe Chen,Jiansheng Gong,Peng Wang,Jungang Jiang
Thermoelectric materials capable of harvesting low-grade heat energy for powering wearable electronics hold significant promise, but their widespread application remains limited by inadequate thermoelectric efficiency and environmental tolerance. Here, we propose an n-type ionic thermoelectric (i-TE) eutectogel through doping ZnCl 2 into a soft carboxymethyl hemicellulose (CMHC)/poly(acrylic acid) matrix, using deep eutectic solvent (DES) as the medium. CMHC simultaneously immobilizes Zn 2+ and reinforces the mechanical performance. The resulting eutectogel achieves an exceptional thermopower of −8.95 mV K −1 , and a remarkable stretchability of 841.8%. Besides, the adoption of DES endows the i-TE eutectogel with strong adhesion, excellent anti-freezing, and anti-drying properties. The integration of four-eutectogel units in series generates an open-circuit voltage of 141.7 mV under a temperature difference of 4 K, and successfully powers a temperature sensor. This work demonstrates the potential of hemicellulose eutectogel in the development of high performance i-TE materials and establishes a promising route toward sustainable and reliable power for next generation wearable devices.
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