SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Wenqing Li,Jingyue Zhang,Linhan Fan,Yun Zhao,Changyan Sun,Wenjun Li,Zhidong Chang
Aniline is an organic pollutant with carcinogenicity and teratogenicity, while F - and Hg 2+ are toxic ions that are easily soluble in water. When they are released to the environment, they will pose a threat to human health. Designing a material that can simultaneously detect three types of pollutants is of great significance. In this paper, a novel rare earth metal organic framework material (Eu-MOF) with three-dimensional structure based on 1-methylimidazole-4,5-dicarboxylic acid was synthesized for the first time through solvent thermal method. It has excellent luminescent performance and can be used as a multifunctional fluorescent probe to detect aniline, F - , and Hg 2+ based on photoinduced electron transfer, energy competitive absorption, and ion exchange mechanisms, with detection limits of 1.79 × 10 -8 , 8.13 × 10 -8 , and 8.83 × 10 -7 M, respectively. It is worth noting that Eu-MOF can detect F - and Hg 2+ in real water samples, such as lake water and green tea water, with favorable recovery rates.
研究领域:
材料科学
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环境化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Chentao Hou,Huayang Liu,Fahim Bakhtari Mohammad
In this study, the transformation relationship between HTiOF 3 and TiOF 2 under hydrothermal conditions was discussed first. With the progress of hydrothermal reaction , HTiOF 3 with small hexagonal structure gradually transformed into TiOF 2 with large cubic structure. Secondly, the effects of alkaline hydrothermal treatment and ion-exchange treatment on the phase and morphology of HTiOF 3 and TiOF 2 were investigated. It was confirmed that hexagonal HTiOF 3 can be used as precursor to prepare fluorine doped H 2 Ti 3 O 7 (F–H 2 Ti 3 O 7 ) nanosheets with ordered mesoporous structure by simple alkaline hydrothermal and ion-exchange methods. The prepared F–H 2 Ti 3 O 7 nanosheets have ordered mesoporous structure, providing a high specific surface area of 404.08 m 2 /g and a macroporous volume of 0.46 cm 3 /g. F–H 2 Ti 3 O 7 can be adsorb tetracycline hydrochloride (TCH) on its surface and then degraded it via photocatalytic processes. Furthermore, herein for the first time the photocatalytic degradation path of TCH by F–H 2 Ti 3 O 7 through the synergistic effect of sensitization and LMCT was proposed. Besides, the reusability study showed that F–H 2 Ti 3 O 7 has the ability to degrade the tetracycline hydrochloride efficiently after five cycles and slightly its high degradation rate change from 92.90% to 82.10% under simulated sunlight. In addition, F–H 2 Ti 3 O 7 has good sedimentation performance, which provides the possibility for the practical application of the photocatalyst .
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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产品关联
DOI
高影响因子
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
·
2023
·
IF 4.9
Yuying Bai,Dawei Tian,Zhengxin Ren,Dangyang Yue,Qian Ren,Li Pei,Jun Pan
Though magnetic iron oxide nanoparticles (IONPs) are approved for clinical use as contrast agents for MR imaging in United States and Europe, and are widely used to label cells in research, the relationship between IONPs and mesenchymal stem cells (MSCs) is not fully addressed. Here the effects of consistently appeared γ-Fe 2 O 3 on the lineage commitment of MSCs were studied to optimize applications of IONPs in MSCs upon verification of viability. 30 nm 10 μg/mL induced highest promotions on osteogenesis, while 30 and 50 nm of 100 μg/mL elicited most chondrogensis in 14 days, where the effects on ALP, GAG and SOX9 appeared after 7 days, while on RUNX2 came out after 10 days. γ-Fe 2 O 3 enhanced intracellular and extracellular Fe 3+ and ROS, modulated F-actin and decreased Lamin A of MSCs at different time scale. The disturbances of F-actin, Lamin A or ROS altered the effects of γ-Fe 2 O 3 on MSC differentiation. Our results demonstrate that different size, concentration and modulation of γ-Fe 2 O 3 are needed in its MSC applications for bone and cartilage tissues. Furthermore, an undocumented phenomenon that the modulation of F-actin affected the Lamin A expression in MSCs was observed.
研究领域:
纳米技术
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干细胞生物学
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生物医学工程
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材料科学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2022
·
IF 5.895
Ya Jiang,Qingqing Jiang,Daming Fan,Mingfu Wang,Yueliang Zhao
The effect of acrolein, a lipid oxidation product, on the formation of the heterocyclic aromatic amine 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx) was investigated in a chemical model containing glycine, creatinine, and glucose. Acrolein addition at 0.02–0.2 mmol increased MeIQx formation, while high levels of acrolein (>0.2 mmol) did not further increase MeIQx formation. Moreover, acrolein addition decreased the residue of glycine and creatinine but increased the residue of glucose; it also increased the formation of volatile intermediates in the MeIQx-producing chemical model. Further analysis indicated that acrolein can react with glycine, creatinine, and MeIQx to eliminate them. These results revealed that acrolein was able to contribute to MeIQx formation as a consequence of the comprehensive ability of acrolein to facilitate Strecker degradation of glycine, increase the formation of volatile intermediates, and react with glycine, creatinine, and MeIQx. In addition, the oxidation of minced salmon increased the content of MeIQx in the roasted salmon patties, further supporting the potential contribution role of lipid oxidation products in the formation of MeIQx.
研究领域:
食品科学
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化学
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毒理学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Guang-Xin Xiang,Guo-Jun Wang,Zhi-Jun Zhang,He Feng,Jing-Tai Zhao,Jiao Wang,Xin-Yuan Sun,Ri-Hua Mao,Yong Wang
The uniform 1D nano-rods of RE 3+ doped Ln 7 O 6 F 9 ( Ln = Y and Lu; RE = Pr, Sm and Eu) were synthesized through a facile two-step hydrothermal method without extra fluorine source followed by post-heat treatment. The phase formation, morphologies, as well as photoluminescence properties of the materials were investigated. The precursor composition was determined to be Ln (OH) 1.69 F 1.31 using the Fourier transform infrared spectrum (FT-IR), thermal gravimetric and differential scanning calorimetry (TG-DSC). The average lengths of Y 7 O 6 F 9 and Lu 7 O 6 F 9 were about 6.8 and 7.9 μm, respectively, with the average width of about 650 nm. It was interesting that the tip of the nano-rods exhibits a straight line and divergent umbrella shaped bifurcation for Y 7 O 6 F 9 and Lu 7 O 6 F 9 , respectively. Upon ultraviolet excitation, Pr 3+ , Sm 3+ and Eu 3+ ions in Ln 7 O 6 F 9 showed blue, orange and red emissions originating from their characteristic f-f transitions. In addition, the 4 f 1 5 d 1 → 4 f 2 band emissions (340–450 nm) as well as typical 4 f 2 → 4 f 2 line emissions (450–700 nm) of Pr 3+ were observed in Pr 3+ -doped Ln 7 O 6 F 9 . For Sm 3+ -doped Ln 7 O 6 F 9 , only the typical f - f transitions of Sm 3+ were observed with the absence of charge transfer (CT) band. However, the broad excitation bands at 255 nm attributing to the charge transfer transition of Eu 3+ (i.e. O 2− → Eu 3+ CT) were observed in Eu 3+ -doped Ln 7 O 6 F 9 .
研究领域:
材料科学
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纳米技术
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光学
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化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Mingjun Zhao,Panting Wang,Chongyun Shao,Weichang Li,Danping Chen,Wei Chen
Novel transparent luminescent glass ceramics with the ability to generate the line emission of Eu2+ ions were successfully prepared. First, Eu2+-doped barium–aluminum–borate oxyfluoride glasses were prepared by high-temperature melting in a reducing atmosphere, and then transparent glass ceramics were obtained by crystallization heat treatment. Fluorescence spectroscopy showed that Eu2+ exhibited only broadband luminescence (FWHM ≈ 136 nm) of the 4f65d1 → 4f7 transition in the glasses. However, after heat treatment, a 359 nm line emission (FWHM ≈ 2.8 nm) from the 4f7 → 4f7 transition of Eu2+ appeared in the glass ceramics. To explore the mechanism of transformation of the optical transition of Eu2+ from 4f65d1 → 4f7 to 4f7 → 4f7, the glasses and glass ceramics were analyzed by fluorescence spectroscopy, X-ray diffraction (XRD), Raman spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy measurements. The results showed that the alteration in the optical transition of Eu2+ was a result of the Eu2+ ions entering the Ba2+ sites with weak crystal field strength in BaAlBO3F2 (BABF) crystals from the strong crystal field strength glass phase.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2024
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IF 3.8
Furong Tang,Ting Zou,Ziyi Wang,Juan Zhang
A novel fluorinated triazine-based covalent organic frameworks (F-CTFs) was designed and synthesized by using melamine and 2,3,5,6-tetrafluoroterephthalaldehydeas as organic ligands for selective pipette tip solid-phase extraction (PT-SPE) of amphiphilic fluoroquinolones (FQs). The competitive adsorption experiment and mechanism study were carried out and verified that this F-CTFs possesses favorable adsorption affinity for FQs. The abundant fluorine affinity sites endowed the F-CTFs high selectivity to FQs extraction through F-F interactions. The adsorption capacity of F-CTFs can reach up to 109.1 mg g −1 for enrofloxacin. The detailed characterization of the F-CTFs adsorbent involved the application of various techniques to examine its morphology and structure. Under optimized conditions, a method combining F-CTF-based PT-SPE with high-performance liquid chromatography (PT-SPE-HPLC) was established, which exhibited a broad linear range, excellent precision, and an impressively low limit of detection, and could be used for the determination of six FQs in milk, with LODs as low as 0.0010 μg mL −1 . The recovery rates during extraction varied between 92.1% and 111.4%, exhibiting RSDs below 6.8% at different spiked concentrations.
研究领域:
分析化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Qiuyang Yu,Ziyi Jiang,Jinlong Yin,Shengli Chen,Xiaohong Hu
Because of its metal-like conductivity, excellent catalytic activity, and acid resistance, lead dioxide (PbO2) is the most used electrocatalyst for the practical electrochemical ozone production (EOP) technique. Introducing fluorine (F) into PbO2 electrodes or electrolytes can significantly improve EOP activity. However, there is still lack of valid evidence on understanding the role of doping F in the PbO2 electrode. In this work, we report a comprehensive study on the effect of F on EOP activity on electrochemically prepared PbO2 electrodes. F doping suppresses the side reaction of dioxygen (O2) evolution by inhibiting the formation of an α phase impurity of PbO2 electrodes. The more hydrophobic surfaces by doping F promote O2 adsorption as evidenced by low-temperature O2-temperature-programmed desorption experiments and thus are more favorable for ozone (O3) generation. The in situ isotope labeling oxygen (18O2) experiment proves that at room temperature, O2 can adsorb and dissociate on the operando PbO2 electrode surface and participate in the formation of O3 molecules. This work provides a comprehensive understanding of doping F for enhanced EOP.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 5
·2966-2976
·
IF 5.2
Xudong Wu,Haojie Yu,Li Wang,Xingguang Meng,Zhikun Huang,Xiaowei Liu,Xiaodan Gong,Jinyi Liu
High thermal conductive polymeric composites are extremely desired for the thermal management of electronic devices due to the rapid development of the modern microelectronic industry. Herein, the functionalized boron nitride (BN) and magnesium oxide (MgO) hybrid fillers (f-BN@f-MgO) were synthesized and used to prepare the enhanced thermal conductive epoxy (EP) composites through the hot-pressing method. The results demonstrated that the covalent binding of BN and MgO in the hybrid fillers reduced the interface thermal resistance effectively between fillers and matrix and the hot-pressing induced force facilitated the construction of the continuous thermal conduction paths. Consequently, the as-prepared epoxy composite at 40 wt% hybrid fillers loading had high thermal conductivity (TC) (1.97 W/[m·K]), outstanding insulating performance (6.9 × 10 15 Ω cm) and excellent thermal stability. Furthermore, a probable thermal conduction mechanism was proposed to illustrate the high TC of the epoxy composite. Therefore, this study provides a new approach to preparing epoxy composites with outstanding performances.
研究领域:
材料科学
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热工程
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高分子科学
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电子学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fan Zhang,Renjie Ji,Yonghong Liu,Zhijian Li,Zheng Liu,Shuaichen Lu,Yating Wang,Xinlei Wu,Hui Jin,Baoping Cai
Exploring the low-cost and high-efficient electrocatalysts with Pt-like activity for alkaline hydrogen evolution through water splitting is imperative yet challenging. Herein, a simple synthesis combined with electrodeposition and facile electro-oxidation is developed to construct the hollow dendritic self-supported electrode (HDSE). X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), and electron paramagnetic resonance (EPR) reveal that the surface of HDSE contains the abundant NiO, which is further decorated by fluorine (F)-doped and oxygen vacancies after electro-oxidation process. The resultant HDSE achieves an excellent electrocatalytic performance for hydrogen evolution reaction (HER) in alkaline condition, leading to the extremely low overpotential of 13 mV to drive a current density of −10 mA·cm −2 , and exhibits the long-time stability at the current density of −100 mA·cm −2 and −500 mA·cm −2 , which is superior to the electrocatalytic ability of Pt/C. Density functional theory (DFT) calculations illustrate the NiO modulated by F-doping and oxygen vacancy, could synergistically improve the charge distribution, enhance the conductivity of NiO structure, and optimize the adsorption energy for intermediates of HER, thus accelerating the electrocatalytic ability for hydrogen evolution. This work opens up a new avenue toward the reasonable design of high-efficient and low-cost electrocatalysts for alkaline hydrogen evolution reaction.
研究领域:
材料科学
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电化学
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催化
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可再生能源
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产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2022
·Vol. 20
·期 3
·1953-1962
·
IF 2.328
Quansheng Wu,Shanshan Ye,Xufeng Zhou,Jianyan Ding
Developing narrowband red phosphors has always been a frontier topic in the phosphor community. In this study, a novel hafnium germanate red phosphor, BaHfGe 3 O 9 :Eu 3+ , was successfully synthesized by solid-state reaction method. The phase and crystal structure of BaHfGe 3 O 9 were investigated by the Rietveld refinement of powder X-ray powder diffraction. The band structure was analyzed by density functional theory calculations. Most importantly, the luminescence behavior of phosphors under near-ultraviolet (n-UV) light and cathode rays sources was studied in detail to explore the possibility of their applications in white light-emitting diodes and field emission display. The BaHfGe 3 O 9 :Eu 3+ phosphor exhibits strong f–f excitation and excellent thermal robustness due to Eu 3+ localization in the rigid lattice and asymmetric Ba 2+ sites. Under cathode rays and n-UV light excitation, BaHfGe 3 O 9 :Eu 3+ exhibits narrowband red light emission peaked at 610 nm. Moreover, BaHfGe 3 O 9 :Eu 3+ shows excellent saturation resistance and aging resistance. The performance of the LED lamp encapsulated by the BaHfGe 3 O 9 :Eu 3+ phosphor was studied. The results show that BaHfGe 3 O 9 :Eu 3+ is a potential red phosphor for multifunctional applications.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2022
·
IF 4.198
Jun Xu,Chao Peng,Bolin Yao,Hua-Jian Xu,Qiang Xie
This report describes a method for the deoxyfluorination of alcohols with KF as the fluorine source via in situ generation of highly active CF3SO2F. Diverse functionalities, including halogen, nitro, ketone, ester, alkene, and alkyne, are well tolerated. Mild conditions, a short reaction time, and a wide substrate scope make this method an excellent choice for the construction of C–F bonds.
研究领域:
有机化学
·
合成化学
✓ 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）