DALTON TRANSACTIONS
·
2025
·
IF 3.3
Tong Wu,Lei Kang,Fan Liu,Ruixin Guo,Shu Guo,Tianhong Huang,Shuangyue Shang,Lijuan Liu,Xiaoyang Wang
Cation regulation is a compelling strategy for developing new compounds with optimized crystal structure by atomic-scale manipulation. Herein, we report two new SBBO-like fluoroberyllium borates, SrMgBe₂(BO₃)₂F₂ (SMBBF) and SrZnBe₂(BO₃)₂F₂ (SZBBF). They crystallize in a trigonal system and feature a [Be₃B₃O₆F₃]∞ single layer stabilized by the incorporation of Mg²⁺/Zn²⁺ cations and F⁻ cations. Both compounds exhibit deep-UV absorption edges below 200 nm. Theoretical calculations confirm their potential as deep-UV birefringent materials, with correspinding birefringence values of 0.064 (SMBBF) and 0.063 (SZBBF) at 589 nm, respectively. This work demonstrates the effectiveness of cation regulation in designing novel borate-based optical materials.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Yanli Zhang,Jiale Zhao,Simeng Zeng,Zixuan Liu,Bo Wang,Fuhua Lin
In this paper, a novel Cu/F co-doping strategy is proposed to modify the electrochemical performance of Sr 2 Fe 1.5 Mo 0.5 O 6– δ (SFM) cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The pristine SFM, Cu-doped Sr 2 Fe 1.4 Cu 0.1 Mo 0.5 O 6− δ (SFCM) and Cu/F co-doped Sr 2 Fe 1.4 Cu 0.1 Mo 0.5 O 5.9− δ F 0.1 (SFCMF) powders were synthesized by acid-glycine combustion method, and the impacts of Cu/F co-doping on the performance of SFM cathode were investigated systematically. It's found that Cu-doped SFCM has higher oxygen vacancy content and electrical conductivity than the pristine SFM and Cu/F co-doped SFCMF cathodes. While the Coulombic force between B-sites metallic ions and oxygen ions are significantly weaken for SFCMF, enhancing the mobility of lattice oxygen. Due to the combined effects of Cu and F doping, SFCMF cathode exhibits the best electrochemical performance among all investigated samples. At 600 °C, the polarization resistant for SFCMF cathode is 1.79 Ω cm 2 , decreased by 43.71 % in contrast to the parent SFM cathode. These results indicate that Cu/F co-doping is an effective strategy to improve the electrochemical properties of perovskite cathode materials.
研究领域:
能源材料
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电化学
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燃料电池
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材料科学
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无机化学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shumail Farhan,Asif Hassan Raza,Long Li,Songyu Yang,Yan Wu
Comprehending the catalytic reaction implementation for heterostructure photocatalysts is crucial by scrutinizing the spatial separation and transfer process of photoexcited charges at nanoscale junctions. Herein, we fabricated the F-doped TiO 2 /ZnIn 2 S 4 -based S-scheme heterostructure using a direct liquid-assembly method. The optimum hydrogen evolution rate (HER) of ∼ 1.58 mmol g –1 h –1 was acquired for 30-F 3 T@ZIS, which was about 15 and 2 times superior to the pristine F-doped TiO 2 and ZnIn 2 S 4 , respectively. The interaction between F-doped TiO 2 and ZnIn 2 S 4 facilitated the charge transfer from ZIS to F 3 T which was confirmed through XPS. UV–vis spectroscopy and Mott–Schottky validated that F-doped TiO 2 and ZnIn 2 S 4 retain the suitable energy band alignment for the S-scheme heterostructure. In situ, KPFM and EPR analysis revealed that F-doped TiO 2 and ZnIn 2 S 4 possess a spontaneous photoelectrochemical response, and their junction significantly improves the internal electric field by separating photoexcited charge carriers. This work provides a conclusive experimental and theoretical validation for an internal electric field and charge flow direction in non-noble-metal-based heterostructure photocatalysts.
研究领域:
材料科学
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催化化学
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Journal of Materiomics
·
2024
·
IF 8.4
Xin Zhou,Chenbin Ai,Xiaojing Wang,Zhen Wu,Jianjun Zhang
Pure ZnO exhibits low photocatalytic H 2 O 2 production activity due to the rapid charge recombination. To realize the spatial separation of photogenerated electrons and holes, constructing an electron transfer channel on the ZnO surface is an effective approach. This study successfully modified the surface of ZnO using F – (ZnO/F) by introducing NH 4 F in an aqueous phase photocatalytic system. The F – is adsorbed on the ZnO surface by Coulombic force and significantly improves the photocatalytic H 2 O 2 production performance of ZnO, with the highest efficiency of 4137.2 μmol·g –1 ·L –1 ·h –-1 . The photocatalytic performance enhancement mechanism of ZnO/F is explained in terms of electron transfer dynamics by femtosecond transient absorption spectroscopy (fs-TAS) measurements. F – surface modification constructs a new ultrafast electron transport pathway from the ZnO CB to F – , and the optimal ZnO/F exhibits the fastest interfacial electron transfer lifetime of 5.8 ps. The F – surface modification effectively facilitates the charge separation, thereby increasing the number of electrons available for photocatalytic H 2 O 2 reaction. This study has revealed the roles of F – surface modification in the photocatalytic H 2 O 2 production by ZnO and provides guidance for ionic modification to improve photocatalytic performance.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xu Zhang,Shuting Li,Jiyang Zhang,Jihong Liu,Chaoyang Huang,Jiapeng Zhu,Guixiao Jia,Shengli An
CeO 2 is a promising electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Studies have found that F-doping improves its ionic conductivity, but the underlying mechanisms remain unclear. Therefore, this study employs a DFT+U method to calculate geometrical and electronic structures and oxygen ion migrations of Gd-, Ca- and F-dopings co-doped CeO 2 . The calculated results are verified by our experiment. DFT calculations find that oxygen vacancies (V) are easily formed at next-neighboring sites near the F - ions, different with the case of Gd- and Ca-doped CeO 2 . Gd-, Ca- and F-dopings strengthen Ce-O bonds, inconstant with the result from the reported experimental hypothesis for the F-doping. The F-doping restrains the change of Ce 4+ to Ce 3+ . Migration energy barriers E m of oxygen ions are mainly affected by the migration distances and peripherally done by the oxygen vacancy cavity size and the defect association. Due to the lager oxygen vacancy cavity size and the smaller defect association in CGOF and CGOCF, the F-dopings have the smaller E m . This is contrary to the speculation of the reported experimental study based on the electronegative comparison of F and O. Our experiment finds that Ca and F co-doping significantly increases the conductivity, 3.9 times of the conductivity of Gd-doped CeO 2 . The study clarifies the nature mechanism of the ionic conductivity in doped CeO 2 , offering atomic-level insights to aid the development of high-performance CeO 2 -based electrolytes.
研究领域:
材料科学
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能源科学
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhaorui Zhang,Jiahao Liu,Haiying Du,Xufei Zhao,Haoming Sun,Minghui Yang,Jinkui Chu
A surface functional group modulation method was used to regulate the NO 2 sensing performance of the Ti 3 C 2 T x sensor. The monolayer Ti 3 C 2 T x MXene was synthesized from Ti 3 AlC 2 (MAX phase) by hydrofluoric acid (HF) etching. Ar/O 2 hybrid plasma treatment was used to regulate the ratio of hydroxyl and fluorine functional groups (OH/ F) in the Ti 3 C 2 T x surface structure. Room-temperature (RH) NO 2 sensor based on modified Ti 3 C 2 T x was fabricated by the dip coating method. The modified Ti 3 C 2 T x sensor has a higher gas response (45.31 %) to 50 ppm NO 2 compared with the untreated Ti 3 C 2 T x sensor which shows more excellent sensitivity and linearity with the NO 2 concentration of 5–50 ppm. It is due to that the presence of the hydroxyl potential on the Ti 3 C 2 T x surface well amplifies the electronic surface activity of Ti 3 C 2 T x . Concurrently, the modified electronic structure augments the adsorption propensity of Ti 3 C 2 T x for O 2 (2.26 |eV|) and NO 2 (3.24 |eV|), thereby improving the NO 2 sensing capability of the Ti 3 C 2 T x sensor. These results demonstrate that Ti 3 C 2 T x with a high ratio of OH/ F functional groups has great potential in developing high-performance room temperature NO 2 sensors.
研究领域:
材料科学
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环境科学
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化学
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高影响因子
Separations
·
2026
·Vol. 13
·期 2
·63
·
IF 3.5
Jingjing Quan,Yuting Zheng,Lan Yao,Lianqing Li,Xingming Ning
The highly efficient performance of photoelectrochemical (PEC) water splitting is largely governed by the construction of active interfaces, especially for the star semiconductor/electrocatalyst system. However, traditional strategies struggle to optimize this critical process. To overcome this challenge, we report a fluorine (F) engineering strategy that enables the synchronous modulation of charge transfer and surface catalytic reaction dynamics in a BiVO4/FeCoOOH-integrated photoanode. Various characterization methods confirm that F engineering can activate the BiVO4/FeCoOOH/electrolyte interfaces. Benefiting from these positive effects, the optimized BiVO4/FeCoOOH-F photoanode achieves a relatively high photocurrent density of 5.46 mA/cm2at 1.23 V vs. RHE, along with outstanding photostability and a small Tafel slope of 96.5 mV dec−1. This study provides new insights into F-based interface manipulation, offering a promising route to developing high-performance semiconductor/electrocatalyst systems for efficient and stable PEC water splitting applications.
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PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY
·
2024
·
IF 2.8
Zhe Han,Shengyi Wang,Ao Gao,Meiqi Dong,Yufeng Xiao,Hongyu Pan,Lining Zheng,Hao Zhang
Tomato wilt disease, caused by Fusarium oxysporum f. sp. lycopersici , is a major soil-borne disease affecting tomato cultivation. In this study, two strains exhibiting significant control effects on F. oxysporum f. sp. lycopersici and tomato growth-promoting effects were isolated from the rhizosphere. Through physiological and biochemical identification, as well as 16S rRNA identification, these strains were identified as Enterobacter quasihormaechei L33 and Klebsiella oxytoca TL2, respectively. And the two strains of bacteria were confirmed to have no antagonistic effect through antagonistic compatibility tests. Notably, when these strains were mixed in a ratio of 5:1, they demonstrated remarkable antifungal activity. The mixed strains induced mycelium swelling, necrosis, and rupture in F. oxysporum f. sp. lycopersici , resulting in a 56.65 % inhibition of mycelial fresh weight. Additionally, they inhibited spore production with an inhibition rate of 787.5 %, and the inhibition rate of the lipopeptide produced reached 93.80 % at 50 mg/mL. Furthermore, in potting experiments, the mixed strains reduced the disease incidence by 36.25 % after 8 weeks. Additionally, compared to the control group, the mixed bacterial strain group enhanced fresh weight, plant height, chlorophyll a and b levels, and root activities by 96.31 %, 18.51 %, 184.48 %, 53.03 %, and 44.31 %, respectively. In addition, mixed strains can inhibit the cell wall degrading enzymes produced by Fusarium oxysporum f sp., induce plant defense enzymes, including increased activity of peroxidase, catalase, and superoxide dismutase, and reduce the decrease in malondialdehyde levels. The mixed strains could colonize tomato plant roots. Overall, these findings suggest a potential biocontrol agent deriving from the mixed strains against tomato wilt disease.
研究领域:
植物病理学
·
微生物学
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高影响因子
JCI Insight
·
2022
·
IF 9.484
Jing Yang,Hongxia Li,Chi Zhang,Yafeng Zhou
There is a high prevalence of ventricular arrhythmias related to sudden cardiac death in patients with chronic kidney disease (CKD). To explored the possible mechanism of CKD-related ventricular arrhythmias, a CKD rat model was created, and indoxyl sulfate (IS) was further used in vivo and in vitro. This project used the following methods: patch clamp, electrocardiogram, and some molecular biology experimental techniques. IS was found to be significantly elevated in the serum of CKD rats. Interestingly, the expression levels of the fast transient outward potassium current–related (I to,f -related) proteins (Kv4.2, Kv4.3, and KChIP2) in the heart of CKD rats and rats treated with IS decreased. IS dose-dependently reduced I to,f density, accompanied by the decreases in Kv4.2, Kv4.3, and KChIP2 proteins in vitro. IS also prolonged the action potential duration and QT interval, and paroxysmal ventricular tachycardia could be induced by IS. In-depth studies have shown that ROS/p38MAPK, ROS–p44/42 MAPK, and NF-κB signaling pathways play key roles in the reduction of I to,f density and I to,f -related proteins caused by IS. These data suggest that IS reduces I to,f -related proteins and I to,f density by activating ROS/MAPK and NF-κB signaling pathways, and the action potential duration and QT interval are subsequently prolonged, which contributes to increasing the susceptibility to arrhythmia in CKD.
研究领域:
心脏病学
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肾病学
·
分子生物学
·
电生理学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Wei Huang,Lin Zhang,Xuejun Lai,Hongqiang Li,Xingrong Zeng
With the increasing occurrences of industrial oily wastewater emissions and crude oil spills, the deteriorated global environment and ecosystems have attracted a great deal of attention worldwide. Herein we report a highly hydrophobic balsa wood sponge wrapped with fluoroalkyl silane modified reduced graphene oxide (F-rGO@WS) for efficient clean-up of all kinds of oils including viscous crude oil from water. The F-rGO@WS possessed excellent water repellency with a water contact angle of 145°. Owing to high hydrophobicity and longitudinal channels, the F-rGO@WS was successfully applied for separating oil-water mixtures, and the separation efficiency reached 99.0%. Furthermore, the F-rGO@WS also possessed quick electrothermal capability and could be utilized as a filter to efficiently separate viscous crude oil from water by means of the generated Joule heat under a low voltage, and the separation rate was about 10 times higher than that without voltage. Our findings stand out a new tool to fabricate functional natural materials and exhibit great potential in practical applications such as water pollution control and clean-up of viscous crude oil.
研究领域:
环境科学
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材料科学
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溢油修复
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纳米材料
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水污染控制
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2015
·
IF 4.529
Bo Yang,Chaojin Jiang,Gang Yu,Qiongfang Zhuo,Shubo Deng,Jinhua Wu,Hong Zhang
The novel F-doped Ti/SnO 2 electrode prepared by SnF 4 as the single-source precursor was used for electrochemical degradation of aqueous perfluorooctanoic acid (PFOA). Higher oxidation reactivity and significantly longer service life were achieved for Ti/SnO 2 –F electrode than Ti/SnO 2 – X ( X = Cl, Br, I, or Sb) electrode, which could decomposed over 99% of PFOA (50 mL of 100 mg L −1 ) within 30-min electrolysis. The property of Ti/SnO 2 –F electrode and its electrooxidation mechanism were investigated by XRD, SEM–EDX, EIS, LSV, and interfacial resistance measurements. We propose that the similar ionic radii of F and O as well as strong electronegativity of F caused its electrochemical stability with high oxygen evolution potential (OEP) and smooth surface to generate weakly adsorbed OH. The preparation conditions of electrode were also optimized including F doping amount, calcination temperature, and dip coating times, which revealed the formation process of electrode. Additionally, the major mineralization product, F − , and low concentration of shorter chain perfluorocarboxylic acids (PFCAs) were detected in solution. So the reaction pathway of PFOA electrooxidation was proposed by intermediate analysis. These results demonstrate that Ti/SnO 2 –F electrode is promising for highly efficient treatment of PFOA in wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
·
IF 2.74
Yong Zhou,Yongli Huang,Zengsheng Ma,Yinyan Gong,Xi Zhang,Yi Sun,Chang Q. Sun
A combination of the differential Raman spectrometrics and contact-angle measurements has enabled resolution of the hydrogen bond (HB, O:H O) relaxation and molecular dynamics in the NaX hydration shells. Observations suggest that the aqueous ions create each an electric field to form the hydration shells through O:H O bond elongation and polarization. The ionic polarization shares the same, and even stronger, effect of molecular undercoordination that shortens the H O bond and stiffen its phonon , and meanwhile, the O O Coulomb repulsivity lengthen and soften the O:H nonbond with an association of polarization. O:H O bond electrification raises not only the structure order of molecules and the viscosity in the hydration shells but also the skin stress and thermal stability of the solution. Exercises not only deepen our insight into the salt solute-solvent interaction involved in the Hofmeister series in terms of O:H O bond electrification but also provide a powerful means quantifying the dynamic, local, molecular-site-resolved information regarding the O:H O bond cooperativity in aqueous solutions.
研究领域:
物理化学
·
分子生物学
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高影响因子
危险品化学品经营许可证（带存储）