ADVANCED MATERIALS
·
2025
·
IF 26.8
Hang Yang,Dong Tu,Yi Wei,Xinru Huang,Haonan Ju,Wei Wang,Fan Xia,Xiuguo Chen,Guogang Li
Owing to the unique mechano-optical response, mechanoluminescence (ML) materials possess dynamic, sensitive, visual, and recoverable strain sensing capabilities. However, the dilemma of lacking outstanding ML materials with high detection precision under micro deformations still exists, thereby hindering advanced applications in multi-angle and multidimensional scenarios. Herein, a novel Pr 3+ -doped perovskite oxide (NaTaO 3 :Pr 3+ )-based composite elastic thin film is developed, which achieves ultrasensitive ML responses to both microscale compressive and tensile strains. Compared with the record of LiTaO 3 :Tb 3+ , the corresponding deformation detection limit has been improved by five times, reaching 0.01%, which is comparable to the performance of the widely used piezoresistive and capacitive sensors. The results reveal that the ML originates from the interaction between adjacent defects and the varying local piezoelectric fields near Pr Na O 9 and Pr Ta O 6 polyhedra. Most notably, the strain and ML demonstrate identical distributions on a 3D-printed model coated with NaTaO 3 :Pr 3+ thin film even under micro deformation less than 0.4%, highlighting the significant potential of NaTaO 3 :Pr 3+ for advanced 3D microstrain sensing applications. This work provides convincing insights into the investigation of ML mechanisms through local trap and piezoelectricity analyses, along with an exemplificative application in advanced strain sensing and visualization at microscopic and multidimensional scales.
研究领域:
材料科学
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纳米科技
·
固态物理
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传感器技术
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Batteries & Supercaps
·
2023
·Vol. 7
·期 4
·e202300479
·
IF 5.7
Xingyi Zhan,Yifan Zhang,Liwei Su,Lei Zhang,Zijin Tong,Hao Wu,Lianbang Wang,Yuanhao Wang,Xiaoxiang Wang
The slow reaction kinetics of Li−O is currently the most pressing technical obstacle to the development of lithium-oxygen batteries. The Li 2 O 2 ′s growth/decomposition pathways dominate the battery performance and can be optimized by exploring efficient cathode catalysts. Herein, we prepare regular, polycrystalline, oxygen vacancy (V O )-riched PrO x uniformly anchored on few-layered graphene (FLG) nanosheets to boost the Li−O reactions. XRD, TGA, XPS, SEM, TEM, SEAD, and electrochemical test techniques are used to study their chemical composition, microstructure, battery performance, and the effect of FLG on the formation of polycrystalline and V O . It is confirmed that FLG provides a large specific surface area and good electron transport. Moreover, it works as an anchoring substrate to transform PrO x from single crystal to polycrystalline, which is beneficial for exposing catalytic sites and V O and improving the battery performance. This unique composition and structure offer efficient active sites, accelerate electron transport, and regulate the Li 2 O 2 ′s nucleation to form nanofilms or nanosheets on the catalyst. With this cathode catalyst, the battery achieved an ultralow total overpotential of 0.618 V, with a discharge capacity of 11489 mAh g −1 in the ultimate-capacity mode and a superior cyclability of 85 cycles under the limited capacity of 500 mAh g −1 . Graphical Vo-riched PrOx is anchored on graphene nanosheets with large specific surface area and high conductivity. Therefore, the active site of oxygen defect in Vo-riched PrOx could be fully exposed to promotes the adsorption and desorption of intermediates, accelerates electron transport, and reduces the reaction energy barrier for excellent OER/ORR activities.
研究领域:
材料科学
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电化学
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能源存储
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纳米催化
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电池技术
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Jia Fang,Peng Chen,Kejian Wang,Zhiyue Xu,ChengZhuang Zhang,Xueshun Wu
The development of highly efficient and stable catalytic oxidation materials is crucial for diesel exhaust aftertreatment systems. In this study, a series of CePrLa x O δ ( x = 0.1–0.5) catalysts with different lanthanum loadings are synthesized using an impregnation method. The influence of high-temperature aged (12 h at 800 °C) and cyclic aged (6 cycles) on the catalytic performance for soot oxidation is investigated. Characterization results suggest that the introduction of lanthanum effectively inhibits catalyst particle agglomeration and high-temperature sintering, while promoting the formation of oxygen vacancies. The catalytic activity tests indicate that Ce 0.63 Pr 0.07 La 0.3 O δ displays significantly better performance after high-temperature aged and cyclic aged. Compared with the undoped lanthanum, the peak temperature (T p ) is reduced by approximately 190 °C and 128 °C, respectively. The prepared catalyst exhibits outstanding carbon soot oxidation stability, significantly enhancing the aged resistance of CeO 2 -based catalysts. This provides crucial evidence for its practical application in Catalytic Diesel Particulate Filters (CDPFs).
研究领域:
催化化学
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环境工程
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材料科学
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能源与动力工程
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大气污染防治
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Xiaoxuan Fan,Yonggui Zheng,Zimin Yao,Pingping Liang,Xuemei Lu,Jianbo Xu,Baijie Guan,Tianya Tan,Shuo Cao,Yang Zhao,Kexin Wang,Feifei Yin,Jiwei Wang
Long afterglow photocatalyst has shown the potential to support all-weather photocatalytic reactions. In this work, an Ag/Ca2Al2SiO7: Pr3+ (Ag/CASO: Pr3+) composite has been synthesized to enhance afterglow-driven photocatalytic activity. Ag loading introduces the surface plasmon resonance (SPR) effect to increase light absorption capacity. It extends the afterglow duration and improves the afterglow intensity via the storage and release of hot electrons. The Schottky junction between Ag and CASO: Pr3+ inhibits the recombination of photogenerated electrons and holes and increase the active sites in photocatalytic reactions. The photodegradation performance of Ag/CASO: Pr3+ was increased by up to 6.6-fold compared to CASO: Pr3+ under afterglow driven. The concentration of active species was further increased by adding Fe3+ and H2O2 to construct the Fenton system. Ag/CASO: Pr3+ can achieve a 55% removal rate of TC and 60% removal rate of NFX under its own afterglow-driven within 1 h after 10 min of ultraviolet light irradiation. This work expands the use of long afterglow luminescence materials and advances the development of all-weather photocatalytic technology.
研究领域:
材料科学
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环境科学
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光催化技术
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Chongyang Chen,Benshuang Sun,Bingxue Han,Lijia Chen,Bin Wu,Chengduo Wang,Zhijun Wang
Indium zinc oxide (IZO) ceramic targets have been extensively studied due to the advantage of high film mobility and controllable resistivity. As the base materials used for IZO ceramic targets, it is crucial to synthesize IZO composite nanoparticles by an effective technique. Herein, praseodymium (Pr)-doped IZO composite nanoparticles are fabricated by co-precipitation method. The influencing factors for the synthesis of the composite nanoparticles are analyzed, and the nanoparticles show the best properties of most uniform particle shape, size, and elemental distribution under the preparation conditions of ammonia or sodium hydroxide as an alkaline precipitant, pH of 7, and sintering temperature of 800°C. The phase composition, micro-morphology, compositional homogeneity, and chemical bonding and functional group changes of precursors and sintered particles are analyzed. Meanwhile, combined with the thermogravimetric - differential scanning calorimetry (TG-DSC) analysis of the decomposition process of the hydroxide precursor during heating, the crystallization activation energy for the transformation of the precursor from the amorphous to the crystalline state was calculated by the Kissinger and Ozawa method. Based on the concept of crystallization fraction, the crystallization mechanism of the mixed particles of precursors is explored. In addition, ceramic targets prepared from the IZO nanoparticles by this method exhibit excellent uniform elemental distribution and fine grain (<4 µm), high density (>99%), and low resistivity (<4 mΩ·cm). This work provides an efficient strategy for the preparation of IZO composite nanoparticles for applications in advanced photoelectric ceramic targets.
研究领域:
材料科学
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纳米技术
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陶瓷材料
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光电子学
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物理化学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 16
·165101
·
IF 3.551
Shengqiang Zou,Fan Guo,Lin Wu,Huixiang Ju,Mingzhong Sun,Rong Cai,Lixia Xu,Yuhua Gong,Aihua Gong,Miaomiao Zhang,Fengyi Du
The antioxidant activity of ceria nanoparticles is tightly regulated by size distribution and heteroatom doping. Inspired by this rule, cerium and praseodymium codoped carbon quantum dots (Ce/Pr-CQDs) were synthesized through the one-pot hydrothermal carbonization method. Taking intrinsic advantage of CQDs, the resultant Ce/Pr-CQDs exhibited uniform and ultra-small morphology with an average size of 2.8 nm, which led to an increased proportion of Ce3+. In addition, the doping of Pr into Ce-CQDs improved the redox properties. As we expected, the Ce/Pr-CQDs possessed enhanced hydroxyl radical scavenging properties compared with the cerium-doped carbon quantum dots (Ce-CQDs). Furthermore, Ce/Pr-CQDs with favorable biocompatibility and negligible cytotoxicity are readily internalized into cytoplasm, decreasing the level of reactive oxygen species (ROS). Taken together, the resultant Ce/Pr-CQDs displayed great potential for applications relating to oxidative-stress-associated disease.
研究领域:
材料科学
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纳米技术
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化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Xiaoying Zhang,Ranran Wei,Zhihan Zhang,Yaxuan Li,Zekai Shen,Ruichen Geng,Yinglong Wang,Junmei Zhang,Shuli Yin
With the worsening of plastic pollution and increasing attention being paid to sustainable development, the upgrading and recycling of waste plastics have become important tasks. In this study, organic ligand-modified PdPr nanosheets (PdPr O-NSs) with the lanthanide contraction effect are constructed and used as high-performance electrocatalysts for the value-added transformation of polyethylene terephthalate. PdPr O-NSs only require a potential of 0.75 V to supply current densities of 200 mA cm −2 . The Faraday efficiency and selectivity for the primary product glycolic acid reached 97.5% and 94.6% at 0.675 V, respectively. Density functional theory calculations confirm that the existence of Pr and n -octanoic acid adjusts the electronic structure and coordination environment, improving the electron transfer efficiency and catalytic performance. This work not only provides a new strategy for constructing novel and efficient lanthanide-doped nanomaterial electrocatalysts but also paves the way for recycling waste plastics.
研究领域:
材料科学
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环境化学
·
纳米催化
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可持续发展
·
高分子化学
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电化学
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资源循环利用
·
理论计算化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 12
·2745-2753
·
IF 7
Hang Zhao,Liang Zhang,Jinsuo Lu,Shouning Chai,Jinliu Wei,Yuning Yu,Ruoyan Miao,Lvling Zhong
Bacterial infections caused by the growth and reproduction of pathogenic bacteria on wounds are one of the main reasons that hinder wound healing. Antibacterial wound dressings protect wounds from bacterial infections. Herein, we developed a polymeric antibacterial composite film using polyvinyl alcohol (PVA) and sodium alginate (SA) as the substrate. The film used praseodymium-doped yttrium orthosilicate (Y2SiO5: Pr3+, YSO-Pr) to convert visible light into short-wavelength ultraviolet light (UVC) to kill bacteria. The YSO-Pr/PVA/SA showed upconversion luminescence in photoluminescence spectrometry tests, and the emitted UVC inhibited Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria in antibacterial tests. In vivo animal tests showed that YSO-Pr/PVA/SA is effective and safe for inhibiting bacteria in real wounds. The in vitro cytotoxicity test further confirmed the good biocompatibility of the antibacterial film. In addition, YSO-Pr/PVA/SA exhibited sufficient tensile strength. Overall, this study demonstrates the potential of upconversion materials for use in medical dressings.
研究领域:
材料科学
·
生物医学工程
·
伤口护理
·
抗菌技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）