CERAMICS INTERNATIONAL
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2024
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IF 5.1
Xingbo Kang,Sihan Feng,Sai Huang,Qi Zhu,Ji-Guang Li
Bi 3+ ion presents strong UV excitation up to ∼430 nm and is almost not excitable by visible light, which makes it valuable in current lighting technologies. Morphologically uniform Sc 1- x VO 4 : x Bi 3+ ( x = 0–0.03, 0.005 interval) and RE 0.99 VO 4 :0.01Bi 3+ (RE = Sc, Lu, Y, Gd, Lu 0.5 Sc 0.5 , Y 0.5 Lu 0.5 , Gd 0.5 Y 0.5 ) micro/nanocrystals were successfully prepared in this work by hydrothermal reaction under 180 °C and pH = 8, without using any chelate or surfactant. The solid-solution vanadates were formed as microrods for Sc and nanocrystals for the other RE owing to different reaction pathways. The optimal Bi 3+ content for luminescence is 1 at% ( x = 0.01) and concentration quenching was analyzed to occur via electric dipole-dipole interaction. The peak wavelength of the excitation/emission band was found to almost linearly increase, accompanied by band broadening, with decreasing cell volume for the series of REVO 4 :0.01Bi 3+ , which was rationalized by considering the energy of metal-to-metal charge transfer (MMCT) and the character of the chemical bond (nephelauxetic effect). Notably, the REVO 4 :0.01Bi 3+ phosphors showed broadband luminescence (FWHM >165 nm) covering almost the entire visible light region in each case, and the center wavelength of emission can be widely and finely tuned from ∼557 to 639 nm by decreasing the size of RE 3+ on demand. Such luminescence performance may allow the micro/nanocrystals to find valuable application in UV-excited white LED lighting and others.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
·
IF 21.1
Shufan Yu,Zhao Sun,Zhiqiang Sun
Methanol steam reforming is a promising approach for real-time hydrogen production, while its practical application is hindered by catalyst deactivation and undesired CO byproduct formation. In this study, we propose a self-activation approach to anchoring a series of x CuO/YCrO 4 catalysts by employing methanol and steam as reductants. The self-activated 0.8CuO/YCrO 4 catalyst achieves a high hydrogen production rate of 22.3 μmol H 2 ·g −1 cat ·s −1 and demonstrates exceptional stability over 3000 min at 220°C. TEM-EDS, XPS, EPR, and XAS collectively reveal the promotion of generating Cu δ + /Y-O v -Cr interfacial sites and oxygen vacancies via self-activation, and in situ Raman spectroscopy confirms the structural stability of the Y-O v -Cr framework. In situ DRIFTS analysis further confirms that Cu δ + /Y-O v -Cr interfacial sites effectively anchor and promote the hydrogenation of bidentate formate intermediates, mitigating active site blockage by byproduct species and enhancing catalytic efficiency. This work provides new insights into the self-activation mechanism of Cu-based catalysts and offers a promising strategy for developing highly active and durable catalysts.
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JOURNAL OF AEROSOL SCIENCE
·
2025
·
IF 2.9
Shuting Lei,Yiyang Zhang,Zhu Fang,Xing Jin,Shuiqing Li
Spray flame synthesis has proven to be a promising method for the high-throughput production of multi-component nanoparticles with atomic-level mixing. However, the fast dynamic of flame synthesis presents significant challenges in precisely controlling the morphology and crystalline phase of the particles, especially for multi components. In this paper, we conduct parametric flame synthesis experiments to identify key factors affecting nanoparticle morphology and crystal phase of Y-Al nanoparticles, focusing on the effects of Y/Al atomic ratio, flame temperature, and precursor volatility. The results indicate that the particle morphology depends on the composition, changing from aggregates with sintering necks to spherical particles without sintering necks and back to aggregates as the Al content increases. This trend is consistent with the change in particle melting points, which initially decrease and then rise again. Thus, the variation in melting point causes changes in sintering time, which in turn affect the particle morphology. The particle crystalline phase gradually deviates from the target phase as the Al content increases. Raising the adiabatic flame temperature from 1551 °C to 2340 °C accelerates the diffusion of Al atoms into the lattice, increasing the target phase proportion in the synthesized particles from 66 % to 99 %. By adjusting the amount of 2-ethylhexanoic acid (EHA) added, the volatility differences between the precursors can be modified. The largest discrepancy in precursor volatility is observed when EHA was added at a 50 % equivalence ratio, resulting in only 6 % of the target phase YAH (YAlO 3 , hexagonal type) in the particles. Increasing the EHA addition to 120 % equivalent results in better matching of precursor volatilities, which leads to a significant increase in the target YAH phase to 98 %, demonstrating the critical role of simultaneous evaporation of different component precursors.
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PEST MANAGEMENT SCIENCE
·
2024
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IF 3.8
Liangzhen Shu,Ya Lv,Zhongyin Chen,Yixian Huang,Meng Zhang,Zhichao Jin,Tingting Li,Yonggui Robin Chi
BACKGROUND Potato virus Y (PVY) is a prominent representative of plant viruses. It can inflict severe damage upon Solanaceae plants, leading to global dissemination and substantial economic losses. To discover new antiviral agents, a class of planar chiral thiourea molecules through the key step of N -heterocyclic carbene-catalyzed nitrile formation reaction was synthesized with excellent optical purities for antiviral evaluations against plant virus PVY. RESULTS The absolute configurations of the planar chiral compounds exhibited obvious distinctions in the anti-PVY activities. Notability, compound ( S )- 4u exhibited remarkable curative activities against PVY, with a half maximal effective concentration (EC 50 ) of 349.3 μg mL −1 , which was lower than that of the ningnanmycin (NNM) (EC 50 = 400.8 μg mL −1 ). Additionally, The EC 50 value for the protective effects of ( S )- 4u was 146.2 μg mL −1 , which was superior to that of NNM (276.4 μg mL −1 ). Furthermore, the mechanism-of-action of enantiomers of planar chiral compound 4u was investigated through molecular docking, defensive enzyme activity tests and chlorophyll content tests. CONCLUSION Biological mechanism studies have demonstrated that the configuration of planar chiral target compounds plays a crucial role in the molecular interaction with PVY-CP, enhancing the activity of defense enzymes and affecting chlorophyll content. The current study has provided significant insights into the roles played by planar chiralities in plant protection against viruses. This paves the way for the development of novel green pesticides bearing planar chiralities with excellent optical purities. © 2024 Society of Chemical Industry.
研究领域:
植物病理学
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有机化学
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药学
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生物化学
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农业科学
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PubMed
高影响因子
BMC PLANT BIOLOGY
·
2025
·Vol. 25
·期 1
·1613
·
IF 4.8
Ghanaim Amira M.,Mahmoud Ghada A.,Mohamed Heba I.,Hanafy Rania S.,Zaki Laila M.,Mahmoud Mohamed,Mogazy Asmaa M.
Background Plant viral infections threaten global food security and cause major crop losses. This study investigates the antiviral effects of biosynthesized Chitosan nanoparticles (ChNPs) with Bacillus subtilis 1211 EMCCN against potato virus Y (PVY) and their influence on tomato growth and yield. Results Scanning electron microscopy showed clusters of crystals on ChNPs, while transmission electron microscopy revealed that the nanoparticles were spherical, ranging from 12 to 198 nm. Energy-dispersive X-ray spectroscopy confirmed the presence of carbon, oxygen, sodium, and phosphorus, and Fourier-transform infrared analysis identified typical chitosan functional groups, including hydroxyl, carbonyl, and amine. Tomato leaves were treated with ChNPs, B. subtilis , or both to evaluate their effectiveness against PVY. The treated plants exhibited a marked reduction in both disease severity and PVY concentration compared to the untreated controls. By 28 days post-inoculation, infectivity decreased to 46.7% in plants treated with Bacillus subtilis, 33.3% with ChNPs, and reached the lowest level of 20% in the combined treatment. The combined priming strategy significantly enhanced plant growth attributes, with increases in shoot length (95.0%), root length (47.0%), leaf area (668.1%), plant height (30.7%), shoot and root fresh weight (370.0% and 162.9%), and shoot and root dry weight (562.7% and 127.7%). Biochemical and physiological analyses revealed substantial increases in total pigments (268.4%), flavonoids (112.2%), phenols (59.4%), α-tocopherol (92.1%), ascorbic acid (30.1%), anthocyanins (71.3%), peroxidase (51.9%), catalase (39.6%), polyphenol oxidase (73.6%), amino acids (119.9%), proline (93.3%), soluble sugars (128.0%), and proteins (614.0%) in shoots. Yield components, including carotenoids and anthocyanins, were also significantly enhanced. Importantly, oxidative stress indicators were markedly reduced, with malondialdehyde and hydrogen peroxide levels decreasing by 76.8% and 72.6%, respectively, in treated plants compared to infected plants. Conclusion These findings suggest that combination between ChNPs and B. subtilis offers an eco-friendly method to enhance tomato yield and effectively manage viral diseases by activating the plants' defense mechanisms.
研究领域:
植物病理学
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纳米生物技术
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农业病毒学
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作物保护
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胁迫生理学
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可持续农业
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PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
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2021
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IF 10.618
Min Chen,Zhen Song,Rui Han,Yang Li,Xiliang Luo
The nonspecific adsorption and accumulation of biomolecules on electrode interfaces remains a challenge for sensitive and accurate detection of disease markers in complex biological media, and it is highly desired to develop antifouling biosensors capable of assaying targets in complicated real liquids. Herein, an efficient and simple antifouling biosensor was constructed based on a self-designed Y-shaped peptide. The Y-shaped peptide was designed with two branches: one branch with the peptide sequence of EKEKEKE for antifouling, and the other branch with the peptide sequence of HWRGWVA for recognizing of human IgG. Under optimized experimental conditions, electrodes modified with Y-shaped peptides exhibited excellent antifouling and electrochemical sensing performances. The developed biosensor was able to effectively resist biofouling in various protein solutions and even serum samples, and the linear range of the biosensor for human IgG detection was from 100 pg mL −1 to 10 μg mL −1 , with a relatively low limit of detection of 32 pg mL −1 (S/N = 3). The antifouling biosensor possesses the capability of assaying human IgG in real serum samples, and this strategy of developing low fouling biosensors based on Y-shaped peptides can be readily expanded to the construction of other biosensing systems for different targets.
研究领域:
生物传感器
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电化学
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肽工程
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分析化学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
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IF 4.758
Bingying Jiang,Fangzhen Li,Cuiyun Yang,Jiaqing Xie,Yun Xiang,Ruo Yuan
The construction of simple and highly sensitive aptasensors will significantly advance the monitoring of proteins. In this work, we have developed a convenient and label-free protein-induced catalytic hairpin assembly signal amplification approach for aptamer-based sensitive electrochemical detection of thrombin in human serums. The target thrombin binds the aptamer-containing hairpin probes immobilized on the sensor electrodes and triggers catalytic assembly of other two hairpins to form many G-quadruplex Y-junction DNA structures in situ . These G-quadruplex structures further associate with hemin to form G-quadruplex/hemin complexes, which are then subject to electrochemical measurement and generate substantially amplified current output for label-free and sensitive detection of thrombin. The developed aptasensor shows a dynamic range of 0.01–1.0 nM and a detection limit of 6.0 p.m for thrombin detection. The sensor can also discriminate the target thrombin against other non-target proteins and exhibits promising results for detecting thrombin in human serums. With the successful construction of the thrombin aptasensor, our signal amplified method can be potentially applied to detect other target molecules by choosing appropriate aptamer/ligand pairs.
研究领域:
生物化学
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医学诊断
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分析化学
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2026
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IF 8.3
Yuanhui Ma,Xi Liu,Minjie Yang,Ling Zha,Ying Huang,Dong Sun,Ruizhuo Ouyang,Yuqin Jiang,Yuqing Miao,Baolin Liu
MicroRNA-21 (miRNA-21) is a key oncogenic biomarker for early cancer diagnosis, yet its ultrasensitive detection in serum remains challenging due to limitations of conventional methods such as low sensitivity, high background, and poor biocompatibility. This study develops an electrochemical biosensor for femtomolar miRNA-21 detection by integrating Y-shaped DNA scaffold-enhanced catalytic hairpin assembly (Y-CHA) and Bi@PtAg nanoclusters (NCs). This design achieved an ultra-low detection limit, approximately 2.8-fold lower than that of the conventional sensor. The Y-CHA strategy spatially confines hairpin probes (H1 and H2) within a Y-DNA scaffold, significantly enhancing signal amplification and hybridization efficiency. Meanwhile, the core-shell structured Bi@PtAg NCs exhibit 2.1-fold higher H₂O₂ reduction catalytic activity than monometallic nanoparticles and demonstrate low cytotoxicity (approximately 80% cell viability at 200 μg·mL⁻¹). The biosensor achieves an ultra-low detection limit of 0.05 fM with a wide linear range from 1 fM to 100 pM (R² = 0.9982). It also displays excellent specificity in distinguishing miRNA-21 from mismatched and non-complementary RNAs, good stability (87.1% signal retention after 8 days), and reliable performance in serum samples (93.0–99.7% recovery, RSD < 5%). This study develops a versatile electrochemical biosensing platform for miRNA analysis and disease biomarker detection.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 5
·3380-3389
·
IF 3.5
Ziqi Ni,Fenglin Wang,Yeqing Guan,Kaijia Hu,Fengyuan Zhao,Xingyu Chen,Yicong Ye,Weijun Zhang,Shuxin Bai
The three key properties required for microwave dielectric ceramics are suitable dielectric constant ( ε r ), high quality factor ( Q × f ), and near-zero temperature coefficient of resonant frequency ( τ f ). Due to the intricate coupling relationship among these three properties, regulating one often leads to the deterioration of the remaining two. In this study, the synergetic regulation of dielectric properties of Ca 0.7 Nd 0.2 TiO 3 was investigated to reduce τ f to near-zero while maintaining its high ε r by A- and B-site substitutions. To avoid the seesaw effect and improve the efficiency of composition optimization, machine learning method was introduced in this study. First, the models for predicting dielectric properties were fitted based on a small amount of high-quality data gathered via a uniform experimental design. Then the dielectric properties of 1037 compositions of (Ca 0.7 Nd 0.2 ) 1− x (Li 0.5 Nd 0.5 ) x Ti 1− y (Mg 1/3 Nb 2/3 ) y O 3 were predicted, from which 69 microwave dielectric ceramics with near-zero τ f and adjustable ε r of 95–125 were quickly picked out, and 5 of them were proved by experiments with very high prediction accuracy. This work was finished within a period of 1 month, which proves the obvious acceleration of composition designing process of microwave dielectric ceramics with the aid of machine learning.
研究领域:
材料科学
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陶瓷工程
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机器学习
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高影响因子
ENERGY & FUELS
·
2026
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IF 6
Jiuhong Wei,Yanni Liu,Shihua Zheng,Yajing Cai,Guojie Zhang
Dry reforming of methane (DRM) provides an attractive pathway for the simultaneous utilization of CH4 and CO2 to produce syngas; however, Co-based catalysts typically suffer from metal sintering, formation of hardly reducible cobalt aluminate (CoAl2O4), and severe carbon deposition under high-temperature conditions. Herein, Y-promoted Co catalysts supported on alumina with tailored pore architectures were developed, with particular emphasis on a hierarchical bimodal porous Al2O3 support (Al2O3-BA) integrating ordered mesopores and interconnected macroporous channels. Compared with mesoporous Al2O3-SA and commercial γ-Al2O3-supported counterparts, the 10Co-5Y/A2O3-BA catalyst exhibited smaller Co3O4 crystallites and more uniform nanoparticle dispersion, indicating mitigated agglomeration. H2-TPR analysis revealed enhanced reducibility with a shift of the main reduction peak to lower temperature and a markedly suppressed high-temperature CoAl2O4 feature, suggesting weakened metal–support interaction. CO2-TPD demonstrated an increased population of medium-strength basic sites, favoring CO2 adsorption and activation. XPS indicated a higher Co2+/Co3+ ratio and an increased proportion of surface-adsorbed oxygen species, implying modified surface electronic properties. These structural and surface characteristics translated into superior catalytic performance. The bimodal catalyst delivered the highest CH4 and CO2 conversions over 650–800 °C and maintained stable activity during a 24 h test at 750 °C, achieving 86.5% CH4 conversion, 91.5% CO2 conversion, and an H2/CO ratio of 0.92. Postreaction analyses revealed significantly reduced carbon deposition compared with mesoporous counterparts. Overall, the synergy between Y promotion and hierarchical bimodal porosity effectively modulates metal–support interaction, enhances reducibility and CO2 activation, and suppresses coking, providing a rational strategy for designing durable Co-based catalysts for DRM.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 12
·118382
·
IF 6.3
Junli Yan,Guangxu Tian,Hao Guo,Qi Zhu,Tao Zhang,Fuhui Wang
The inner walls of semiconductor processing chambers are susceptible to corrosion and failure under prolonged exposure to harsh environments. Applying protective ceramic coatings can effectively suppress plasma-induced erosion. This work focuses on high-hardness Y 3 Al 5 O 12 (YAG) ceramics. By introducing La–O bonds, the interfacial strength and corrosion resistance of the coatings are enhanced. A low‑temperature co‑precipitation method combined with liquid‑phase coating was employed to fabricate composite powders of (Y 0.7 La 0.3 ) 2 O 3 @Al 2 O 3 (YLAO) and (Y 0.7 La 0.3 ) 2 O 2 F 2 @Al 2 O 3 (YLAFO) for YAG ceramic coatings, effectively suppressing the differential interfacial reactions between Y and La. The YLAFO coatings exhibit a dense microstructure with uniform elemental distribution. Under NF 3 /O 2 /Ar mixed‑plasma etching conditions, the coating shows an etching rate of only 2.81 nm/min, representing an approximately 88% improvement in erosion resistance compared to Y 2 O 3 ‑derived (YO) YAG coatings. This work demonstrates that coating performance can be enhanced through compositional design and process control, providing a feasible solution for protecting semiconductor etching components.
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高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
·
IF 6.7
Peng Zhang,Xiao-Qi Zhang,Yang-Fan Yin,Jie-Ying Liu,Guang-Hui Liu,Yao-Shun Wen,Yu-Hong Kang,Jun Ma,Yan-Jun Li,Xian-Yong Wei
The trade-off between catalyst morphology regulation and electronic structure of metal centers is crucial for achieving goals of heterogeneous catalysis. In this study, a Ni-based mesopore Y zeolite, Ni@MY, was developed by a combined modification strategy of bond blocking and deposition-precipitation, and used for the hydrofining of ethanol-soluble portion (ESP) derived from Dongming lignite ethanolysis. The results show that Ni@MY has excellent hierarchical pore structures and enhanced acidity. These properties effectively improve the electronic properties of metal active centers and the accessibility of medium/large molecules, thereby significantly enhancing the performance of aromatic ring hydrogenation and heteroatom removal. In addition, the synergistic transfer of active hydrogen, including H ··· H, δ+ H ··· H δ- , H + , and H · can be induced over Ni@MY, which effectively promotes the conversion of different aryl ethers into alkyl cyclanes. Analysis revealed that ESP is rich in alkanes, arenes, phenols, ketones, and esters, with aromatics accounting for up to 69.3%. After hydrofining, the refined oil contained 96.8% saturated hydrocarbons, among which cyclanes accounted for as much as 83.6%. Compared with conventional Ni@Y, Ni@MY has superior suitability for processing complex crude oils derived from lignite liquefaction for producing high-grade liquid fuels.
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高影响因子
危险品化学品经营许可证（带存储）