APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2024
·Vol. 130
·期 11
·1-17
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IF 2.5
Xu Dian,Yang Mingxin,Luo Zhengwei,Lian Zhouyang,Zhou Yongzhang,Geng Wenhua,Kong Weifeng,Li Jiaojiao
It is well known that zinc oxide (ZnO) is recognized as a highly effective and stable inorganic antibacterial material. The dispersibility and microstructure of ZnO play crucial roles in determining its antibacterial activity. In this investigation, we successfully synthesized ZnO nanoparticles with exceptional dispersibility and potent antibacterial properties through ultrasonic sonication, utilizing sodium hexametaphosphate, sodium dodecyl benzene sulfonate, and sodium polyacrylate as effective dispersants. To comprehensively assess the impact of these dispersants on the structure and morphology of the ZnO nanoparticles, various characterization techniques, including X-ray diffraction analysis, transmission electron microscopy imaging, Fourier transform infrared spectroscopy, thermogravimetric analysis, UV‒Vis absorption spectroscopy, X-ray photoelectron spectroscopy, and zeta potential analysis, were employed. The average particle sizes calculated for ZnO-SHMP, ZnO-SDBS, and ZnO-PAAS are approximately 300 nm. The zeta potential of ZnO-SHMP, ZnO-SDBS, and ZnO-PAAS are − 18.67, -12.77, and − 16.77 mV, which is significantly lower than that of the pristine ZnO (-2.01 mV). Our findings demonstrate that the addition of dispersants significantly enhances the dispersibility of ZnO nanoparticles while also improving their antibacterial efficacy against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) by achieving an antibacterial rate exceeding 99%. It’s observed that the introduction of dispersants led to morphological changes in the ZnO particles, contributing to their enhanced antibacterial activity. Compared with dark conditions, particularly under fluorescent lamp irradiation, superior antibacterial effects were achieved. Mechanistically, our findings suggest that the synergistic effect of the ZnO-bacteria interaction, along with soluble Zn 2+ ions and the generation of reactive oxygen species, accounts for the observed antibacterial efficacy. The average contents of ZnO-PAAS released Zn 2+ in the liquid culture media of E. coli and S. aureus were 27.5 mg/L and 41.1 mg/L, respectively, higher than that of the pristine ZnO. The incorporation of ZnO, which is prepared with a dispersant, into waterborne paint yields a pronounced antibacterial effect, rendering it highly promising for practical applications such as antibacterial coatings.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-17
·
IF 14.7
Lin Lin,Ba Zhaojing,Tian Hao,Qin Haoxiang,Chen Xi,Zhou Xin,Zhao Shanlan,Li Lang,Xue Fangchao,Li Hong,He Lang,Li Xiaochen,Du Jiahui,Zhou Zhenhua,Zeng Wen
There is no effective and noninvasive solution for thrombolysis because the mechanism by which certain thrombi become tissue plasminogen activator (tPA)-resistant remains obscure. Endovascular thrombectomy is the last option for these tPA-resistant thrombi, thus a new noninvasive strategy is urgently needed. Through an examination of thrombi retrieved from stroke patients, we found that neutrophil extracellular traps (NETs), ε-(γ-glutamyl) lysine isopeptide bonds and fibrin scaffolds jointly comprise the key chain in tPA resistance. A theranostic platform is designed to combine sonodynamic and mechanical thrombolysis under the guidance of ultrasonic imaging. Breakdown of the key chain leads to a recanalization rate of more than 90% in male rat tPA-resistant occlusion model. Vascular reconstruction is observed one month after recanalization, during which there was no thrombosis recurrence. The system also demonstrates noninvasive theranostic capabilities in managing pigs’ long thrombi (>8 mm) and in revascularizing thrombosis-susceptible tissue-engineered vascular grafts, indicating its potential for clinical application. Overall, this noninvasive theranostic platform provides a new strategy for treating tPA-resistant thrombi.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-19
·
IF 14.7
Poredoš Primož,Gao Jintong,Shan He,Yu Jie,Shao Zhao,Xu Zhenyuan,Wang Ruzhu
Passive solar membrane distillation (MD) is an emerging technology to alleviate water scarcity. Recently, its performance has been enhanced by multistage design, though the gains are marginal due to constrained temperature and vapor pressure gradients across the device. This makes condenser cooling enhancement a questionable choice. We argue that condenser heating could suppress the marginal effect of multistage solar MD by unlocking the moisture transport limit in all distillation stages. Here, we propose a stage temperature boosting (STB) concept that directs low-temperature heat to the condensers in the last stages, enhancing moisture transport across all stages. Through STB in the last two stages with a heat flux of 250 W m −2 , a stage-averaged distillation flux of 1.13 L m −2 h −1 S −1 was demonstrated using an 8-stage MD device under one-sun illumination. This represents an 88% enhancement over the state-of-the-art 10-stage solar MD devices. More notably, our analysis indicates that 16-stage STB-MD devices driven by solar energy and waste heat can effectively compete with existing photovoltaic reverse osmosis (PV-RO) systems, potentially elevating freshwater production with low-temperature heat sources.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Wang Yuxiong,Zhang Yaoyu,Wang Xiaoqiang,Liu Yue,Wu Zhongbiao
Photocatalytic direct oxidation of methane to C 1 oxygenates offers a green alternative to conventional energy-intensive and high-carbon-footprint multi-step processes. However, current batch-type gas–liquid–solid reaction systems under high-pressure conditions face critical challenges in real-time product separation and concentration for industrial implementation. Here, we demonstrate a continuous-flow gas – solid photothermal catalytic route for methane conversion to formaldehyde under ambient pressure, where the generated gas-phase formaldehyde can be easily collected by water absorption. The Ag single-atom modified ZnO photocatalyst achieves a formaldehyde production rate of 117.8 ± 1.7 μmol h −1 with 71.2 ± 0.8% selectivity. Meanwhile, a highly concentrated formaldehyde solution (514.2 ± 33.7 µmol mL −1 , 1.54 ± 0.10 wt.%) is obtained through 12-hour water absorption, effectively overcoming the product enrichment barrier that plagues conventional batch reaction route. This study establishes a robust technological foundation for sustainable industrial-scale conversion of methane to value-added chemicals.
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BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
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2024
·
IF 1.5
Su Yongyou,Zhu Bowen,Zhang Yingjie,Meng Qi,Dong Peng
With the rapid development of the global economy, energy crisis and environmental protection problems are in urgent need of solution. And the development of energy-saving and new energy vehicles is an inevitable trend to improve the energy structure, alleviate the conflict between oil supply and demand, and improve the living environment of human beings. Layered high nickel material is considered as one of the most promising cathode materials for power batteries because of its high energy density, high platform potential and good rate capability. However, it has problems such as high dependence on cobalt resources and poor cycling stability. In this paper, the preparation of layered high nickel cobalt-free cathode materials is investigated. Because Fe element has the advantages of large reserves and low price. At the same time, Fe makes the layered structure of the positive electrode more stable. In this paper, LiNi 0.8 Mn 0.17 Fe 0.03 O 2 (Li/TM = 1.01, 1.03, 1.05) materials with different Li/TM ratios were prepared by solid-phase method to investigate the effects of different Li/TM ratios on the structural and electrochemical properties of LiNi 0.8 Mn 0.17 Fe 0.03 O 2 materials. The results show that the materials synthesized with different Li/TM ratios have a layered structure. When the Li/TM ratio is 1.03, the crystal structure is the best and the degree of Li/Ni mixing is the least. The electrochemical performance study shows that the synthesized materials have the optimal electrochemical performance at the Li/TM ratio of 1.03. The electrochemical behavior during lithium embedding/delithiation was also investigated by quasi-in situ XRD, dQ/dV and CV tests. This study will provide some reference and guidance for the development and application of next-generation low-cost cobalt-free lithium-ion batteries.
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Scientific Reports
·
2025
·Vol. 15
·期 1
·1-10
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IF 3.9
Zhou Haoyan,Zu Mei,Tang Xinxuan,Chang Yuanxi,Li Shiquan,Yang Hongrui,Lv Chenglong,Cheng Haifeng
Molecular sieves were widely used in the chemical industry, which caused a large number of inactivated molecular sieves to be discarded, resulting in a serious waste of resources and environmental pollution. Recently, recycling of discarded molecular sieves (DMS) has become a research hotspot. This study proposes an economical method using DMS to prepare green pigments mimicking foliage spectrum. The synthesized products were subjected to characterization using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Ultraviolet-visible-diffuse reflectance spectroscopy (UV-Vis-DRS), and scanning electron microscopy (SEM). The analysis revealed that sulfur radicals can be effectively incorporated as chromophores within the β-cages that are formed during the recrystallization process of sodalite, these cages are highly conducive to accommodating the radicals, thereby providing a protective environment that shields them from external influences. By adjusting the mass ratio of Na 2 CO 3 /S, the visible reflectance spectrum of ultramarine pigments can be easily modified. In addition, camouflage coating based on ultramarine green can be used to simulate the spectral reflectance characteristics of green vegetation. The Spectral Angle Mapping (SAM) system was used to evaluate the simulation effect of the camouflage coating. At a threshold below 98.5%, the camouflage coating still be misidentified as leaves, this method can recycle massive solid waste resources and significantly reduce the preparation cost of imitation green vegetation camouflage pigments.
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Drug Delivery and Translational Research
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2024
·
IF 5.7
Yao ZhongWei,Zhang Wei,Hu Yehong,An Zhentao,Fang Zhijun,Wang Jing,Zhang Zhenhai
Eugenol possesses anti-inflammatory and antioxidant properties, and may serve as a potential therapeutic agent for hepatic fibrosis. However, the development of solid eugenol formulations is challenging due to its volatility. To address this issue, this study employed porous silica to adsorb solidified eugenol. The solidified powder was characterized using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). In addition, the differences in in vitro release and oral bioavailability between eugenol and solidified eugenol powder were investigated. The effectiveness of eugenol and eugenol powder in treating liver fibrosis was investigated using enzyme-linked immunosorbent assay (ELISA), polymerase chain reaction (PCR), and histopathological observations. Our results indicate that porous silica can effectively solidify eugenol into powder at a lower dosage. Furthermore, we observed that porous silica accelerates eugenol release in vitro and in vivo. The pharmacodynamic results indicated that eugenol has a positive therapeutic effect against hepatic fibrosis and that porous silica does not affect its efficacy. In conclusion, porous silica was able to solidify eugenol, which may facilitate the preparation and storage of solid formulations.
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PHYSICS AND CHEMISTRY OF MINERALS
·
2024
·Vol. 51
·期 2
·1-10
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IF 1.2
Yao Yao,Liu Xi,Du Xueyan,Zhang Lili,Yuan Hongsheng
Iron hydroxide FeO 2 H x ( x ≤ 1) and ferrous iron chloride FeCl 2 can adopt the HP-PdF 2 -type (space group: \(P{a_{\overline 3 }}\) , Z = 4) structure in the lowermost mantle, potentially contributing to the geochemical cycles of hydrogen and chlorine within Earth’s deep interior, respectively. Here we investigate the high-pressure behavior of HP-PdF 2 -type FeCl 2 by X-ray diffraction (XRD) and Raman measurements in laser-heated diamond anvil cells. Our results show that HP-PdF 2 -type FeCl 2 can be formed at 60‒67 GPa and 1650‒1850 K. Upon cold decompression, the diffraction peaks at pressures above 10 GPa can be indexed to the HP-PdF 2 -type structure. Intriguingly, the calculated cell volumes reveal a remarkable decrease of Δ V / V = ∼ 14% between 36 and 40 GPa, which is possibly caused by a pressure-induced spin transition of Fe 2+ (HS: high-spin → LS: low-spin). We also observe distinct changes in Raman spectra at 33‒35 GPa, practically coinciding with the onset pressures of isostructural phase transition in XRD results. Our observations combined with previous studies conducted at megabar pressures suggest that HP-PdF 2 -type FeCl 2 , with a wide pressure stability range, if present in subducting slabs, could facilitate the transport of chlorine from the middle lower mantle to the outer core.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-20
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IF 12.6
Yang Jinghong,Li Runli,Wang Xiaoshuang,Lu Dongheng,Li Weichang,Wang Yan
Irregular alveolar bone defects pose persistent clinical challenges due to their complex morphology and the lack of biomaterials that simultaneously provide structural integrity, biocompatibility, and dynamic osteoinductive potential. Herein, we report a fiber-reinforced, dual-network hydrogel system (OHADN fiber@Yoda1 hydrogel) engineered to recapitulate mechanobiological cues for enhanced bone regeneration. This injectable hydrogel integrates oxidized hyaluronic acid (OHA) crosslinked with Yoda1-loaded PLGA-collagen fiber fragments and stabilized via catechol-Fe³⁺ coordination, forming a robust and self-healing structure. The fiber network enhances matrix stiffness and sustains Yoda1 release, promoting PIEZO1 activation in stem cells and enabling persistent mechanotransduction. In vitro, this system effectively regulates macrophage polarization, maintains cellular tension homeostasis, and significantly upregulates osteogenic markers via the PIEZO1–ITGα5 axis. Transcriptomic profiling and mechanistic validation revealed that focal adhesion and cytoskeletal signaling pathways are enriched upon hydrogel treatment. In a rat alveolar bone defect model, the OHADN fiber@Yoda1 hydrogel demonstrated superior bone volume restoration and trabecular architecture compared to conventional materials. This work presents a promising paradigm for spatiotemporal control of osteoimmune microenvironments through mechanoresponsive biomaterials.Graphical abstract
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Chen Yu,Sun Junchao,Li Yongxu,Wang Yubao,Shi Shaofeng,Jiang Jing,Wang Hongzhen,Cao Lan
Developing polyurethane foams (PUF) with superior water absorption and retention remains challenging due to insufficient understanding of structure-–property relationships. This study systematically regulates the water content gradient (as blowing agent) in all-water-foamed PUF to optimize physicochemical properties. Comprehensive characterization via SEM, contact angle, water absorption, retention, and resilience tests reveals that water content critically governs microcellular architecture, surface hydrophilicity, and their synergistic effects on water management. The optimized formulation (2.5 phr water) achieves exceptional performance: 421.73% water absorption, 76.31% retention, and 55.10% resilience. These enhancements originate from uniform cell structures that harmonize hydrophilic group distribution with mechanical integrity. This work establishes fundamental guidelines for designing eco-friendly PU foams with balanced resilience and hydroscopic functionality, validated through theoretical and experimental insights.
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Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-10
·
IF 20.257
Pang Jincong,Zhao Shan,Du Xinyuan,Wu Haodi,Niu Guangda,Tang Jiang
Multi-energy X-ray detection is sought after for a wide range of applications including medical imaging, security checking and industrial flaw inspection. Perovskite X-ray detectors are superior in terms of high sensitivity and low detection limit, which lays a foundation for multi-energy discrimination. However, the extended capability of the perovskite detector for multi-energy X-ray detection is challenging and has never been reported. Herein we report the design of vertical matrix perovskite X-ray detectors for multi-energy detection, based on the attenuation behavior of X-ray within the detector and machine learning algorithm. This platform is independent of the complex X-ray source components that constrain the energy discrimination capability. We show that the incident X-ray spectra could be accurately reconstructed from the conversion matrix and measured photocurrent response. Moreover, the detector could produce a set of images containing the density-graded information under single exposure, and locate the concealed position for all low-, medium- and high-density substances. Our findings suggest a new generation of X-ray detectors with features of multi-energy discrimination, density differentiation, and contrast-enhanced imaging.
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Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-11
·
IF 20.257
Liu Yanfeng,Al-salihi Mahmoud,Guo Yong,Ziniuk Roman,Cai Songtao,Wang Luwei,Li Yuan,Yang Zhigang,Peng Dengfeng,Xi Kai,An Zhongfu,Jia Xudong,Liu Liwei,Yan Wei,Qu Junle
Flexible organic materials that exhibit dynamic ultralong room temperature phosphorescence (DURTP) via photoactivation have attracted increasing research interest for their fascinating functions of reversibly writing-reading-erasing graphic information in the form of a long afterglow. However, due to the existence of a nonnegligible activation threshold for the initial exposure dose, the display mode of these materials has thus far been limited to binary patterns. By resorting to halogen element doping of carbon dots (CDs) to enhance intersystem crossing and reduce the activation threshold, we were able to produce, for the first time, a transparent, flexible, and fully programmable DURTP composite film with a reliable grayscale display capacity. Examples of promising applications in UV photography and highly confidential steganography were constructed, partially demonstrating the broad future applications of this material as a programmable platform with a high optical information density.
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