JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 47
·21882-21894
·
IF 3.5
Hu Hao,Zhao Xia,Mao Xiang,Dong Yongrun,Li Wen,Xue Jinkun,Li Zequan,Gao Wei
White light-emitting diodes (WLEDs), as strong contenders for future solid-state light sources, hold significant promise in solid-state lighting due to their high efficiency, low power consumption, self-emission, and versatility. Carbon dots (CDs), a novel type of carbon nanomaterials, exhibit excellent luminescence properties. However, their intricate structure and unclear fluorescence mechanism hinder long-wavelength modulation, and solid-state aggregation leads to luminescence quenching, limiting their application in optoelectronic devices. This study focuses on the preparation of CDs with dual yellow–green emission peaks via a hydrothermal method using sodium lignosulfonate as a carbon source. The mechanism behind the dual emission is elucidated by analyzing the morphology and chemical composition of the CDs. Specifically, the green light originates from surface-related states due to N doping, while the yellow light results from the carbon-core state at higher hydrothermal temperatures. By incorporating these CDs into transparent wood, a material capable of emitting white light under blue light excitation is achieved. This transparent wood was successfully applied in the fabrication of WLEDs, providing valuable insights into CDs modulation and their utilization for white light solid-state lighting applications.
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CELLULOSE
·
2025
·
IF 4.8
Ma Hailong,Wang Wenbo,Yu Wei,Kong Fangong,Wang Shoujuan,Liu Keyin,Zhou Zhe,Wei Guijuan,Wang Xiaohui,Liu Yu
Nanocellulose, which can be derived from abundant renewable plant sources, possesses outstanding properties such as nano-size, high strength, and high reactivity, rendering it a promising alternative to fossil-based materials in the future. However, the conventional drying of nanocellulose aqueous suspensions tends to result in significant aggregation, which substantially impedes the functionalization of nanocellulose by organic modifying reagents. This study presents an innovative method for drying nanocellulose from aqueous suspension into ultrafine powders while preserving its nanoscale properties. Ammonium bicarbonate was introduced into the aqueous suspension of cellulose nanofibrils (CNFs) to precipitate CNFs that were then dispersed in n-butanol. During the evaporation process, the ammonium bicarbonate decomposed, and the water evaporated, leading to the drying of CNFs in pure n-butanol into an ultrafine powder with high dispersibility. When prepared with a large amount of n-butanol, these ultrafine powders demonstrate enhanced redispersibility in water, with the ability to form a stable suspension through simple agitation. Our research in this paper centers on elucidating the dispersion mechanism of CNF ultrafine powders. We suggest that CNF ultrafine powders dried from n-butanol form a loosely porous mesoporous structure. In the absence of significant changes in crystallinity, the substantial reduction in the inaccessible area of the amorphous regions is likely responsible for their enhanced redispersibility in water. Additionally, by capitalizing on the micro- and nano-structural characteristics of CNF ultrafine powders, we have successfully developed a superhydrophobic coating by applying hydrophobic modification and adhering the treated powder to the surface of filter paper. This outcome not only substantiates the practical applicability of CNF ultrafine powders but also affirms their micro- and nano-dimensional structural attributes. This paper proposes a straightforward and viable approach for the reaction of functionalized organic reagents with nanocellulose, thereby significantly broadening its potential applications.
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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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Advanced Fiber Materials
·
2024
·
IF 17.2
Hu Xili,Zhang Bo,You Chaoyu,Tian Mingwei,Xing Dongming,Zhang Xueji,Qu Lijun
Alternating current electroluminescent (ACEL) fibers with wearable characteristics, such as flexibility, light weight, stitchability and comfort, are emerging in textile displays for daily applications. To construct efficient ACEL fibers, a judiciously designed and low-cost electrode is also extremely important but seems to receive less attention. Inspired by fiber dyeing, we propose a method that employs non-noble metals to design fiber electrodes by constructing microconductive channels inside commercial fibers. This method relies on the window period formed by the glass transition temperature of the PAN fibers, which is sufficiently flexible to extend to mass production at a low cost (approximately US$ 1.86/kg). The resulting ACEL fibers interwoven with a transparent fiber electrode formed a textile display with an acceptable luminescence performance of 46 cd · m −2 (160 V). Notably, a visual feedback e-textile (VFET) was constructed by integrating fiber sensors, which demonstrates the concept of wearable real-time visual monitoring and interaction. Compared with their individual counterparts, VFET has been conveniently and efficiently for visual monitoring, communication, and interaction, i.e., the visualization of physiological parameters (heartbeat, respiration, etc.) and nonverbal communications (literal or cryptographic) for special groups and specific scenes. Graphical Abstract
Non-noble metal electroluminescent (EL) fibers and accessible, sensitive, and flexible visual feedback e-textiles (VFET) capable of being integrated into smart clothing and wearable devices are proposed in this work
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IRANIAN POLYMER JOURNAL
·
2024
·
IF 2.4
Yang Guoqian,Liu Mengmeng,Su Yingfeng,Yu Chi
Amidst the relentless innovation in materials science and bone tissue engineering, the quest for next-generation bone graft materials with bespoke functionalities has emerged as a pivotal research domain. This study produced and characterized a novel bone healing material. First, we explained how three-armed polylactic acid (3s-PLA) was created in supercritical carbon dioxide (ScCO 2 ) and utilized as a matrix material. Following that, we described how the solution blending approach was employed to create three-armed polylactic acid/chitosan/nanohydroxyapatite (3s-PLA/CS/nHA) composites. The composites were then drug-loaded with prednisone acetate as a model drug utilizing the supercritical impregnation technique. Ultimately, the Ritger-Peppas model was substantially followed by the drug release of the drug-loaded composites when the in vitro drug-release kinetics of the drug-loaded materials were investigated. The porous structure of 3s-PLA was demonstrated by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and nuclear magnetic resonance (NMR) hydrogen spectroscopy. Morphologic studies using scanning electron microscopy (SEM) revealed the homogeneous distribution of drug in the matrix of the mixtures as well as the porous structure of 3s-PLA and 3s-PLA/CS/nHA. The hydrophilicity of 3s-PLA/CS/nHA was examined by the use of water contact angle (WCA), revealing that the material in question has a hydrophilic water contact angle of 45.69°. Furthermore, research was conducted using one-way tests and investigations to characterize in vitro drug-release carrier materials under various drug conditions and temperatures. The carrier material consistently released up to 84.8% of prednisone acetate over the course of 72 h, demonstrating good control over prolonged release, according to the results. Graphical abstract
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Discover Oncology
·
2025
·Vol. 16
·期 1
·1-16
·
IF 2.9
Wang Biao,Zhang Nianjie,Dai Lin,Zhang Yuanwei,Yin Shuo,Yang Xuefeng
Nonylphenol (NP) is a common environmental contaminant and endocrine disruptor. Our previous research demonstrated that NP could promote the proliferation and epithelial-mesenchymal transition (EMT) of colorectal cancer (CRC) cells; however, the specific mechanism remains unclear. miRNA sequencing revealed that NP upregulated the expression levels of microRNA(miR)-151a-3p in CRC. Analysis of The Cancer Genome Atlas (TCGA) data revealed increased expression levels of miR-151a-3p in CRC tissues. The present experiments showed that NP could activate the WNT/β-catenin signaling pathway, and promoted the migration and invasion of CRC cells by increasing the expression levels of miR-151a-3p. Through bioinformatics analysis and dual-luciferase reporter assays, Fyn-related kinase (FRK) was identified as a target gene of miR-151a-3p. Knockdown of FRK promoted NP-induced EMT in CRC cells and activated the WNT/β-catenin signaling pathway, while overexpression had the opposite effect. In summary, the present study demonstrated that NP could inhibit FRK expression via miR-151a-3p, activate the WNT/β-catenin signaling pathway, and promote EMT in CRC cells.
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Applied Biological Chemistry
·
2024
·Vol. 67
·期 1
·1-14
·
IF 2.3
Wang Hong,Liao Xiang,Lin Chunyao,Bai Weidong,Xiao Gengsheng,Huang Xingyuan,Liu Gongliang
The aims of the present stud were to optimize fermentation parameters of seedless wampee wine using response surface methodology (RSM) and evaluate the changes in flavor metabolites during fermentation. Seedless wampee wine of optimal sensory quality was produced using an inoculum concentration of 0.6%, initial sugar levels of 200 g/L, a fermentation temperature of 22 °C, and a fermentation period of 9 days. Then the flavor compound profiles (amino acids, organic acids and volatile aroma compounds) of seedless wampee wine during the fermentation under optimal conditions were analyzed using high performance liquid chromatography (HPLC) and gas chromatography–mass spectrometr (GC-MS). The main fermented phase of fermentation resulted in fluctuations in both total amino acids and organic acids, with stabilization occurring later on. A total of 54 volatile components, including esters, alcohols, terpenes, and acids, were putatively identified. Terpenes were the primary drivers of the flavor characteristics of seedless wampee. The rise of esters and decline of terpenes have the potential to significantly alter the flavor of wine during fermentation. These results would contribute to the further development of seedless wampee wine.
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IONICS
·
2024
·
IF 2.4
Yuan Huaming,Zhang Yunqiang,Lu Yiming,Li Xin,Liu Ming,Cui Jiaxi,Li Mei,Jing Laiying
Lithium-sulfur batteries (LSBs) have a high theoretical specific capacity (1675 mAh/g) and are expected to replace lithium-ion batteries as a new generation of high-density energy storage devices. However, the existence of problems such as the “shuttle effect” causes an irreversible loss of LSB capacity. In view of this, carbon nanorods embedded with cobalt nanoparticles (Co-CNRs-CTAB) were successfully prepared through the high-temperature pyrolysis of prism-shaped polypyrrole loaded with zeolitic imidazolate framework-67 under the assistance of cetyltrimethylammonium bromide (CTAB), applied as commercial polypropylene (PP) separator modifiers to promote the rapid capture and redox conversion of soluble polysulfides for upgrading LSBs. The results show that the LSBs assembled with modified Co-CNRs-CTAB/PP separator have amazing electrochemical performance, involving a high initial mass specific capacity of 1091.8 mAh/g (1 C) and excellent cycling stability (594.7 mAh/g after 300 cycles at 3 C). Even at − 10 °C, the capacity attenuation of the LSBs per cycle is only 0.05% after 150 cycles. Therefore, this work provides an operationally simple and low-cost solution for improving the cycle life of LSBs.
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International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 11
·2508-2517
·
IF 5.6
Zhang Yahong,Zhang Yi,Liu Huimin,Li Dan,Wang Yibo,Xu Chunchao,Tian Yuping,Meng Hongjie
Facing the complex variable high-temperature environment, electromagnetic wave (EMW) absorbing materials maintaining high stability and satisfying absorbing properties is essential. This study focused on the synthesis and EMW absorbing performance evaluation of TiN/Fe 2 N/C composite materials, which were prepared using electrostatic spinning followed by a high-temperature nitridation process. The TiN/Fe 2 N/C fibers constructed a well-developed conductive network that generates considerable conduction loss. The heterogeneous interfaces between different components generated a significant level of interfacial polarization. Thanks to the synergistic effect of stable dielectric loss and optimized impedance matching, the TiN/Fe 2 N/C composite materials demonstrated excellent and stable absorption performance across a wide temperature range (293–453 K). Moreover, TiN/Fe 2 N/C-15 achieved a minimum reflection loss (RL) of −48.01 dB and an effective absorption bandwidth (EAB) of 3.64 GHz at 2.1 mm and 373 K. This work provides new insights into the development of high-efficiency and stabile EMW absorbing materials under complex variable high-temperature conditions.
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 11
·4271-4281
·
IF 2.2
Hou Mohan,Wang Lifang,Xu Qiuyu,Zhang Xuepeng,Yang Xue,Zhang Lei,Bai Yun,Li Yanyun,Liu Lifang
Waste cotton fibers are an ideal raw material for extracting nanocellulose crystals (CNCs), benefitting from their high cellulose content. In this study, the waste cotton fibers from the calendering finishing process were used to extract CNCs by sulfuric acid, TEMPO oxidation, and phosphoric acid methods, aiming to create a new way to reutilize the waste cotton fiber and also to verify the practicability that the phosphoric acid method can replace sulfuric acid and TEMPO oxidation methods. The CNCs obtained from the three methods are all in cellulose I state with an average length of 200-500nm and diameter of 15-20nm, indicating that the waste cotton fiber can extract CNCs. However, the CNCs from the phosphoric acid method showed the highest thermostability but the lowest crystallinity, while the ones from the sulfuric acid and TEMPO oxidation methods had higher crystallinity but lower thermal stability. Overall, the three methods are all acceptable for preparing CNCs, but the phosphoric acid method has more significant potential due to its low cost, environmental friendliness, and safety. Graphical abstract
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Nature Protocols
·
2025
·
IF 16
Lian Zewei,Chi Jimei,Yang Xu,Cheng Lijun,Xie Daixi,Tan Zhiyu,Chen Sisi,Yun Yang,Yibulayimu Yisilamu,Wu Wei,Song Yanlin,Su Meng
There is an urgent requirement to improve accessibility to diagnostic tools in remote areas. This requires assays that are easy to use, are cost-effective and produce rapid results. Important public health applications include early disease diagnosis, real-time monitoring, epidemic control and medical cost control. This protocol describes the fabrication of all-printed photonic crystal (PC) biochips for point-of-care testing of biomarkers. The photonic crystal material is prepared by the self-assembly of latex nanospheres that are printed onto a polyethylene terephthalate substrate. Photonic crystals composed of latex nanospheres of different sizes enhance the fluorescent signal emitted at different wavelengths, resulting in remarkably higher detection sensitivity. PC microarrays enable mass-printed preparation (up to 2,700 pieces can be printed per hour by one printer), and each microarray can be stored for a long time (>6 months) after heating. Biomarker specificity is achieved by the biofunctionalization of the nanospheres, for example, attaching capture antibodies. The detection involves the use of a fluorescently labeled detection antibody and a simple point-of-care detection device. This universal approach can be applied to the detection of many biomarkers, and the simultaneous detection of multiple biomarkers is also possible. Here we demonstrate describing how to prepare a chip that can be used to detect three inflammatory biomarkers in 10 min at low sample volumes at a cost of less than 3 CNY (~US$0.41) per PC codetection biochip. The biofunctionalization process including capture antibody coupling and blocking takes 3–4 h, and the detection process takes 20 min.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Sun Lin,Feng Wenwen,Liu Yuncong,Chen Lili,Chen Tao,Jin Zhekai,Wang Chao
There is a pressing need for soft robots capable of rapid movement at extreme environments, necessitating the development of ionic conductors with high ionic conductivity, low Young’s modulus, high elasticity, and high stability at extreme environments. However, existing ionic conductor materials cannot meet all of above needs. The preparation of water-free ionic conductive organogels is expected to solve the above problems. In this work, we design a synergy strategy to combine ion-dipole interactions with hydrogen bonds and successfully obtain ethylene glycol (EG) gels at a low polymer concentration of 5 mol%. Our EG gels possess high ionic conductivity (1.31 mS cm −1 ), low Young’s modulus (7.3 kPa), high elasticity (~100%), and good extreme environmental stability. The EG gels can work stably for long time at extreme environments (−27 to 123 °C and 10% to 70% relative humidity (RH)). Furthermore, we successfully achieved dielectric elastomer actuator devices stable operation at extreme environments and with 42 times longer lifetime than commonly used ionogels. We also achieved a soft robot that can work stably at extreme environments with a high speed of 3.6 BL s −1 (body lengths per second).
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