NANO
·
2017
·
IF 1.025
Aijia Wei,Wen Li,Lihui Zhang,Xiaohui Li,Xue Bai,Zhenfa Liu
Zn 2 + and F − ions are successfully used to modify pure Li 4 Ti 5 O 1 2 via a co-precipitation method followed by calcination at 400 ∘ C for 5 h in an Ar atmosphere in order to further investigate the reaction mechanism of the fluoride modification process. Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical measurements. After the modification process, no ZnF 2 coating layer is formed on the surface of Li 4 Ti 5 O 1 2 , instead, F − ions react with Li 4 Ti 5 O 1 2 to generate a new phase, composed of a small amount of anatase TiO 2 , rutile TiO 2 , LiF, and Zn 2 + ions are suspected to form a ZnO coating layer on Li 4 Ti 5 O 1 2 particles. The electrolyte reduction decomposition is suppressed in Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 due to the ZnO coating layer. 1 wt.% Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 exhibits the best rate capability, which leads to a charge capacity of 236.7, 227.8, 222.1, 202.7, 188.9 and 150.7 mAh g − 1 at 0.2C, 0.5C, 1C, 3C, 5C and 10C, respectively, between 0 V and 3 V. Furthermore, 1 wt.% Zn 2 + and F − co-modified Li 4 Ti 5 O 1 2 exhibits 96.0% charge capacity retention at 3C rate after 200 cycles, which is significantly higher than that of pure Li 4 Ti 5 O 1 2 (78.4%).
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 16
·4845-4853
·
IF 7
Yi-Lei Lv,Lei Huai,Yu-Long Wei,Liang Ma,Yue-Qi Wei,Wenlong Liu,Ru-Ling Tang
Combining multiple anions to design compounds with novel structures and excellent optical properties has become a hot research field. In this paper, a novel nitrate oxyfluoride, Hg3O2(NO3)F, has been obtained. Hg3O2(NO3)F features an unprecedented [(Hg3O2F)+]∞ cationic framework constructed by V-shaped HgO2 units and original HgO2F2 tetrahedra and with isolated NO3− anions balancing the charge. Hg3O2(NO3)F is the first nitrate oxyfluoride containing a d10 metal. Importantly, Hg3O2(NO3)F exhibits superior optical anisotropy with the calculated birefringence of Δn = 0.23 at 1064 nm. Based on the theoretical calculation analyses, the good optical anisotropy is mainly derived from the well-arranged V-shaped HgO2 units. This work proves that the strategy of introducing heteranions is effective for exploring high-performance optical materials.
研究领域:
材料科学
·
无机化学
·
光学材料
·
晶体化学
·
理论物理
✓ 已验证
DOI
高影响因子
Journal of Saudi Chemical Society
·
2026
·Vol. 30
·期 4
·62
·
IF 5.2
Zhang Tingyu,Cai Tingting,Yu Tanlai,Han Xiaojing,Sun Qi,Qi Guoli
This work reported on boron-, fluorine-, and nitrogen-co-doped carbon dots (B/F/N-CDs) produced via a straightforward one-step hydrothermal process, followed by a detailed characterization of their properties. The B/F/N-CDs exhibited bright visible fluorescence, which was rapidly quenched by doxycycline (DOX) through a dynamic quenching mechanism. A fluorescent sensing platform for doxycycline was established, showing good linearity within the concentration range of 0.138–0.421 mM. Satisfactory recoveries (97.79-102.77%) and low relative standard deviations (RSD ≤ 4.45%) were achieved in spiked water samples, demonstrating reliable practical applicability. Moreover, when incorporated into poly(vinyl alcohol) (PVA) films, the B/F/N-CDs reduced the second after-flame time in vertical burning tests from 9.5 s to 5.2 s, indicating improved flame-resistant performance. The results confirm that heteroatom co-doping was a viable tactic for producing multifunctional carbon dots capable of serving dual application roles.
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Ying Long,Xuehua Dong,Lin Qi,Lindong Luan,Zichen Ren,Zhien Lin,Guohong Zou
Balancing large birefringence with ultraviolet (UV) transparency remains a central challenge in the development of birefringent crystals. Herein, we report two Sb(III)-based hypophosphites, Sb(H2PO2)2Cl and Sb(H2PO2)2F, and comparatively investigate their crystal structures and optical properties. Single-crystal X-ray diffraction analysis shows that Sb(H2PO2)2Cl crystallizes in a wave-like two-dimensional (2D) layered structure, whereas Sb(H2PO2)2F adopts a 1D chain structure. Optical measurements reveal that Sb(H2PO2)2F exhibits a markedly enhanced birefringence of 0.205 at 546 nm, compared with 0.055 for Sb(H2PO2)2Cl, in good agreement with DFT-calculated values of 0.211 and 0.041, respectively. Meanwhile, Sb(H2PO2)2F retains a wide band gap of 4.81 eV and a short UV cutoff edge of 258 nm, indicating a favorable balance between optical anisotropy and UV transparency. Further structure–property analysis suggests that the enhanced birefringence of the fluoride is closely associated with the more favorable orientational efficiency of the stereochemically active lone pair on Sb3+. These results demonstrate that halogen substitution is an effective approach for tuning optical anisotropy in UV-transparent Sb(III)-based hypophosphites.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shu-An Ye,Maolong Qiao,Yuanlu Xu,Jiaying Yan,Chenglong Li,Renjia Yuan,Ziyi Xiong,Guohao Xie,Yi Xiong,Xiaoming Zhang,Kang Du
In this work, a series of Na (1- x ) Ca (1+ x ) Ga (1+ x ) Si (2- x ) O 7 (0 ≤ x ≤ 0.9) ceramics were successfully prepared via the conventional solid-state reaction method, achieved the synergistic substitution of Ca 2+ for Na + and Ga 3+ for Si 4+ in NaCaGaSi 2 O 7 ceramic. The crystal structure evolution, microwave dielectric properties, and structure-performance relationships of the Na (1- x ) Ca (1+ x ) Ga (1+ x ) Si (2- x ) O 7 ceramics were systematically characterized by multiple analytical techniques including XRD Rietveld refinement, XPS, far-infrared spectroscopy, and first-principles calculations. The synergistic dual-ion substitution effectively optimized the microstructure of NaCaGaSi 2 O 7 -based ceramics, suppressed the formation of oxygen vacancy defects, and modulated the chemical bonding characteristics, thereby significantly improving the comprehensive microwave dielectric performances. Notably, the Na (1- x ) Ca (1+ x ) Ga (1+ x ) Si (2- x ) O 7 ( x = 0.7) ceramic achieved excellent comprehensive properties: ε r = 9.01, a high Q×f value of 31049 GHz, and a small negative τ f value of −13.36 ppm/°C. Furthermore, a high-gain dielectric patch antenna fabricated using the optimized ceramic substrate achieved a peak gain of 10.66 dBi and a maximum radiation efficiency of 85.68% at 13.63 GHz, verifying the great application potential of Na (1- x ) Ca (1+ x ) Ga (1+ x ) Si (2- x ) O 7 ceramics for Ku-band communication applications.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Shihan Kang,Letian Gao,Le-Le Zhang,Xue Zhang,Lei Wang,Nannan Lu,Lin-Wei Chen
N,F co-doped porous carbon materials were synthesized from waste tea leaves via a facile pyrolysis approach. • Highly dispersed Fe species and abundant Fe-N x active sites enhanced electrocatalytic activity toward caffeic acid. • The Fe/N,F-TC-0.25/GCE sensor exhibited a wide detection range (0.05–100 μM) and a low detection limit of 0.014 μM. • Synergistic effects of porous carbon structure and Fe-N x sites improved electron transfer and sensing performance. • The sensor reliably caffeic acid in tablet and blueberry samples, confirming practical applicability. Caffeic acid (CA), a phenolic compound widely present in natural foods, exhibits multiple pharmacological activities and plays an important role in regulating food quality. However, its dose-dependent biotoxicity and the demand for accurate determination in complex matrices pose significant challenges to analytical techniques. In this study, waste tea leaves were employed as a biomass-derived carbon source naturally containing elements such as N and F. Through Fe 3+ pre-complexation followed by pyrolysis, N,F co-doped porous carbon modified with highly dispersed Fe species was obtained. Under optimized conditions, the constructed Fe/N,F-TC-modified glassy carbon electrode (Fe/N,F-TC/GCE) electrochemical sensor exhibited excellent performance for CA detection. This superior performance can be mainly attributed to the porous structure of N,F-TC, which facilitates CA mass transfer and enhances reaction efficiency. Meanwhile, the high density of Fe-N active sites provides abundant catalytically active centers. Their synergistic catalytic effect significantly amplifies the redox signal of CA, thereby improving the electrocatalytic activity. The Fe/N,F-TC-0.25/GCE electrode showed a good linear response in the range of 0.4–7 μM and an overall working range over 0.05–100 μM. The statistically estimated limit of detection (LOD) was as low as 0.014 μM. Moreover, the sensor was successfully applied to the spiked detection of CA in tablet and blueberry samples, with recoveries close to 100%, demonstrating the excellent analytical performance of this method and its applicability to real-sample analysis. This study provides a simple, environmentally friendly, efficient, and sensitive detection strategy for CA related food quality control and pharmaceutical analysis, highlighting both theoretical significance and practical application potential. A Fe-containing N,F co-doped porous carbon (Fe/N,F-TC) was constructed from waste tea leaves through Fe 3+ pre-coordination followed by pyrolysis. The hierarchical porous framework, highly dispersed Fe species, and Fe-N x sites facilitate CA mass transport and electrocatalytic oxidation, markedly enhancing the electrochemical sensing performance toward caffeic acid. Download: Download high-res image (198KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Jin Fang,Minmin Mao,Yuxuan She,Yutao Yang,Yingjie Ren,Hadi Barzegar Bafrooei,Mahdi Feizpour,Alexander Korotkevich,Viktor Sergeevich Leontev,Mikhail P. Kuz'min,Shuqing Song,Weiquan Zhang,Kaixin Song
MgSiO 3 ceramics hold promise for millimeter-wave applications owing to their low relative permittivity and cost-effectiveness, but their performance is limited by polymorphism and phase transitions. To mitigate these challenges, we strategically introduced Ge 4 + ions to stabilize the orthoenstatite (OEN) phase and prepared MgSi 1- x Ge x O 3 ceramics via a solid-state method. X-ray diffraction (XRD) and Raman spectroscopy confirmed a phase transition from clinoenstatite (CEN) to OEN with increasing Ge 4+ concentration, resulting in a predominantly OEN phase at x ≥ 0.15. Scanning Electron Microscopy (SEM) revealed that Ge 4+ influenced grain size, uniformity and density. The relative permittivity ε r increased from 6.07 ± 0.11–7.10 ± 0.09 with increasing x , while the temperature coefficient τ f decreased monotonically. Optimal Q × f values of 140,000 ± 11,000 GHz at 13.1 GHz and 216,880 ± 12,840 GHz at 24.4 GHz were achieved at x = 0.15. After one year, the microwave dielectric properties remained robust, underscoring the potential of MgSiO 3 for practical millimeter-wave applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xingzhuo Han,Peng Wu,Yibo Wang,Xiuli Hu,Zhiyu Jia,Juan Gao
The lower thermodynamic potential of the urea oxidation reaction (UOR) makes it an ideal alternative to the conventional oxygen evolution reaction (OER). However, most Ni-based UOR catalysts face intrinsic limitations due to the high oxidation potential of Ni3+, coupled with insufficient selectivity. Herein, F/Mo codoped Ni-based catalyst F-MoNiP is obtained with an amorphous nanotube structure. The F/Mo codoped strategy enhances UOR activity by facilitating the formation of catalytically active NiOOH species at low overpotential and simultaneously promotes urea decomposition through the environmentally preferred carbonate pathway. Moreover, the presence of F effectively suppresses the OH– adsorption, thereby minimizing the competition with OER. This synergistic optimization enables F-MoNiP to achieve exceptional catalytic performance, operating at a cell voltage of 1.395 V to deliver a current density of 10 mA cm–2 in urea-assisted electrolysis of water. These findings offer a sustainable and energy-efficient route for hydrogen production through urea electrolysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Mandi Ji,Yunlong Xu,Zhen Zhao,Huang Zhang,Dong Liu,Chongjun Zhao,Xiuzhen Qian,Chunhua Zhao
La 3+ and F − co-doped Li 4 Ti 5 O 12 (LTO) anode materials are synthesized successfully via a solid state reaction. The structure and morphology are characterized by XRD , SEM and EDS . The results indicate that La 3+ and F − ions were uniformly dispersed in Li 4 Ti 5 O 12 lattice without changing the structure and morphology of Li 4 Ti 5 O 12 . Li 3.95 La 0.05 Ti 5 O 11.7 F 0.3 (La005-F03) exhibits an outstanding electrochemical performance among all the samples in a potential range from 0.5 to 2.5 V, and delivers a discharge capacity of 103 mAh g −1 at 10C rate, whereas the LTO only gives 62.5 mAh g −1 . The sample La005-F03 retains a discharge capacity of 170.1 mAh g −1 after 100 cycles at 1C rate. The improved electrochemical performance could be attributed to the appropriate co-doping with La 3+ and F − , which can increase the amount of Ti 3+ /Ti 4+ mixing as charge compensation, leading to the decrease of the charge transfer resistance and improvement of the electronic conductivity and lithium ion diffusion coefficient .
研究领域:
材料科学
·
电化学
·
储能技术
·
无机化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Xiaodan Jiang,Xiaowei Liu,Jiayi Cai,Shibo Wei,Yanan Wang,Zhuqing Duan,Zeao Zhou,Ruixue Sun,Xiaofei Qu,Yuanzheng Tang
Due to its excellent bone conductivity and drug adsorption as well as pH-responsive drug release property, hydroxyapatite (HAp) is widely used as a drug carrier in bone repair field. Here, we report for the first time a novel multi-functional polydopamine (PDA) coated Cu/F-codoped HAp (Cu/F-HAp-PDA) hollow microspheres . Both Cu 2+ and F - were successfully doped into the lattice of HAp and uniformly distributed in the shell of hollow microspheres through a one-step hydrothermal synthesis . Then PDA was coated homogeneously on the outer layer of Cu/F-HAp hollow microspheres. Both Cu/F-HAp and Cu/F-HAp-PDA samples displayed high drug loading efficiency and pH responsive drug release behavior. Moreover, the obtained Cu/F-HAp-PDA hollow microspheres exhibited excellent photothermal conversion efficiency and photothermal stability. The molecular dynamics simulations showed that PDA and HAp can form mutual binding mainly through Ca-O bonding, while doxorubicin (DOX) is mainly bound to PDA molecules through hydrogen bonding and π-π stacking interaction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 36
·17188-17202
·
IF 4.682
Ouyang Yuanyong,Zhang Zihao,Huang Wei,Yang Wenzhong,Shen Chuanlai,Chen Yun,Yin Xiaoshuang,Liu Ying
Fluorinated hydroxyapatite-titanium dioxide coating (F-doped HA-TiO 2 ) was deposited in situ onto AZ31 Mg alloy using electrodeposition method. XRD and EDS confirmed the crystal structure and composition of the coating. SEM images showed that the F-doped HA-TiO 2 coating on the surface of AZ31 Mg alloy was extremely uniform and the thickness of coating was reflected by the cross-sectional image. Corrosion behavior of the coating modified Mg alloy was tested by electrochemical and immersion experiments. Compared to the corrosion current density ( I corr ) of the uncoated AZ31 Mg alloy in Hank’s solution, the I corr of F-doped HA-TiO 2 coating was decreased almost 4 orders. The coated AZ31 Mg alloy showed superior biocompatibility, which was strongly demonstrated by the amounts of cells increased in cell culture. The results of hemolysis tests also illustrated that the F-doped HA-TiO 2 coating met the requirements of biomedical materials.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Si-Wei Xiong,Qian Zou,Ze-Gang Wang,Jun Qin,Yang Liu,Nan-Jun Wei,Meng-ying Jiang,Jing-Gang Gai
Wearing surgical masks remains the most effective protective measure against COVID-19 before mass vaccination, but insufficient comfortability and low antibacterial/antiviral activities accelerate the replacement frequency of surgical masks, resulting in large amounts of medical waste. To solve this problem, we report new nanofiber membrane masks with outstanding comfortability and anti-pathogen functionality prepared using fluorinated carbon nanofibers/carbon fiber (F-CNFs/CF). This was used to replace commercial polypropylene (PP) nonwovens as the core layer of face masks. The through-plane and in-plane thermal conductivity of commercial PP nonwovens were only 0.12 and 0.20 W/m K, but the F-CNFs/CF nanofiber membranes reached 0.62 and 5.23 W/m K, which represent enhancements of 380% and 2523%, respectively. The surface temperature of the PP surgical masks was 23.9 ℃ when the wearing time was 15 min, while the F-CNFs/CF nanocomposite fibrous masks reached 27.3 ℃, displaying stronger heat dissipation. Moreover, the F-CNFs/CF nanofiber membranes displayed excellent electrical conductivity and produced a high-temperature layer that killed viruses and bacteria in the masks. The surface temperature of the F-CNFs/CF nanocomposite fibrous masks reached 69.2 ℃ after being connected to a portable power source for 60 s. Their antibacterial rates were 97.9% and 98.6% against E. coli and S. aureus , respectively, after being connected to a portable power source for 30 min.
✓ 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）