JOURNAL OF FLUORINE CHEMISTRY
·
2020
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IF 2.332
Yongyang Chen,Dan Guo,Xiaochun Dong,Yahui Li,Yixuan Huang,Hao Chen,Shanping Li
Perfluorooctanoic acid (PFOA), as a refractory organic pollutant, seriously harms the environment and damages human health. Here, the electrocatalytic method was selected to degrade PFOA. In this work, perovskite catalysts doped with different elements, and corresponding gas diffusion electrodes (GDE) were prepared by the gel-sol method and citric acid complexation method. The crystal structure, microscopic morphology, and electrochemical properties of the LaNi x Y 1-x O 3 (Y = Fe, Cu, Co, Sr) perovskite catalyst electrode were analyzed by XRD, TEM, and CV. Moreover, the electrocatalytic performances of the as-prepared electrodes were assessed by the degradation of PFOA, and the Sr-doped GDE exhibited the highest degradation rate of PFOA. The optimum degradation conditions, such as the current density, pH, and initial concentration were also investigated. It was observed that when the current density was 20 mA/cm 2 , pH was 5, and initial concentration was 0.25 mmol/L, the Sr-doped GDE had the best degradation and defluorination efficiency of PFOA reached 90.0 % and 75.1 %, respectively. High performance liquid chromatography-mass spectrometry (HPLC-MS) was used to analyze the intermediate products of PFOA degradation and obtain the degradation pathway. With the combined action of OH and O 2 , PFOA was degraded by stepwise removal of CF 2 groups, which were ultimately degraded into F − and CO 2 .
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JOURNAL OF ELECTRONIC MATERIALS
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2020
·Vol. 49
·期 8
·4945-4951
·
IF 1.774
Li Yan,Zhang Lin-Bin,Song Shuang,Lian Xiao-Xue
Au/Y-ZnO composite with excellent acetone sensing was successfully prepared by a facile wet chemical method. X-ray diffraction analysis, field-emission scanning microscopy, and transmission electron microscopy investigation revealed that the obtained Au/Y-ZnO was mainly composed of ZnO wurtzite phase and Au nanoparticles with a face-centered structure in diameter of 10 nm, and Y atom replaced Zn lattice sites to form yttria phase. Compared with the pure ZnO and Y-doped ZnO, the Au/Y-ZnO-based sensor shows significantly enhanced acetone gas sensing. Its response to 100 ppm acetone is 27.6, which is about 2.3 and 5.5 times that of the Y-ZnO and the pure ZnO, respectively. The Au/Y-ZnO-based sensor has a low detection limit (1 ppm), and fast response (3 s) and recovery (9 s). Au modification can obviously decrease the operating temperature (275°C). The enhanced gas-sensing of Au/Y-ZnO towards acetone can be ascribed to Y Zn and V
− Zn
defects, the Schottky barrier between Au nanoparticles and Y-doped ZnO, and the catalytic activity of the Au nanoparticles.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Wenjiang Huang,Di Mei,Junlong Zhang,Dongfang Chen,Jingan Li,Liguo Wang,Yifan Zhou,Shijie Zhu,Shaokang Guan
Severe and non-uniform degradation of magnesium (Mg) alloys limits their general application in the field of vascular stents . Polymer coatings , which have been widely used in biodegradable materials, can simultaneously reduce degradation and improve the biocompatibility of Mg alloys. In this study, polycaprolactone (PCL) coating was prepared on Mg–Zn–Y–Nd alloy by electrografting. The microstructure of the prepared coating is significantly influenced by current density and monomer concentration, according to scanning electron microscope/energy dispersive spectroscopy results. The electrografted PCL coating has two molecular weights , 15.5 × 10 3 g·mol −1 and 1.08 × 10 3 g·mol −1 , according to gel permeation chromatography results. Electrochemical and immersion tests show that the electrografted PCL coating has better anti-corrosion properties than the PCL coating prepared using the traditional dipping method. Meanwhile, human umbilical vein endothelial cells and smooth muscle cells culture results show that electrografted PCL coating improves the magnesium alloy’s ability to maintain cell viability . Furthermore, arginine-glycine-aspartic acid was fixed on the surface of the PCL coating to confirm the possibility of functionalisation of the electrografted PCL coating. The results show that the composite coating promotes cell adhesion.
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SOLID STATE IONICS
·
2019
·
IF 2.886
Wei Huang,Weidong Zhuang,Ning Li,Min Gao,Wenjin Li,Xianran Xing,Shigang Lu
LiNi 0.88 Co 0.09 Al 0.03 O 2 is one of the most promising and practical candidates to be applied as next-generation cathodes for lithium-ion batteries due to its high discharge specific capacity (approximately 210 mAh g −1 ), energy density and low cost. Nevertheless, severe capacity fading and poor rate performance are the major barriers for their large-scale application. Herein, a simple and sufficient mechanical mixing method is adopted to prepare a nanoscale Y-doped ZrO 2 modified LiNi 0.88 Co 0.09 Al 0.03 O 2 cathode material with enhanced electrochemical performance . The crystal structures, surface morphologies and electrochemical properties of the bare and modified materials are also characterized. The results confirm that the as-prepared Y-doped ZrO 2 modified LiNi 0.88 Co 0.09 Al 0.03 O 2 cathode material delivers an initial discharge specific capacity of 215.1 mAh g −1 with a coulombic efficiency of 91.8% between 2.5 and 4.3 V. The cycling stability is also remarkably enhanced with a capacity retention from 67.5% to 85.5% after 100 cycles at 1 C rate. Further investigations indicate that the aforementioned excellent performance can be attributed to suppressing impedance increase by stabilizing the cathode material from unfavorable side reactions with the electrolyte and preventing the propagation of intergranular cracking without hindering lithium-ion diffusion .
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FREE RADICAL BIOLOGY AND MEDICINE
·
2019
·
IF 5.657
Xueming Cao,Na Zhu,Li Li,Yuwei Zhang,Yan Chen,Jing Zhang,Jiang Li,Chuanyu Gao
Aims Y-box protein 1 (YB1) is a key regulator of inflammatory mediators . However, the roles of YB1 in oxidized low-density lipoprotein (ox-LDL)-induced macrophage inflammation and lipid uptake remain less understood. Thus, we explored the roles of YB1 in ox-LDL-induced macrophage inflammation and lipid uptake and its underlying molecular mechanisms. Methods An ox-LDL-induced atherosclerosis (AS) model was used in this study. Western blotting , RT-PCR, immunofluorescence, ELISA, dil-ox-LDL staining, a dual-luciferase reporter assay, RNA-binding protein immunoprecipitation (RIP) and in vivo experiments were used to detect each target. Results ox-LDL downregulates YB1 expression in THP-1-derived macrophages and human monocyte-derived macrophages (hMDMs) via the NF-κB pathway. Downregulation of YB1 is facilitated by lipid uptake in macrophages, and CD36 is involved in this process. Furthermore, YB1 suppresses CD36 protein levels by directly binding to the coding sequence of the CD36 gene to promote CD36 mRNA decay but does not affect its mRNA transcription. Additionally, YB1 knockdown enhances the inflammatory response and lipid deposition via the NF-κB pathway in vivo. Conclusion ox-LDL decreases YB1 expression in macrophages, resulting in enhanced inflammatory responses by affecting NF-κB and facilitating lipid uptake by promoting scavenger receptor CD36 mRNA decay.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2015
·
IF 2.353
Renping Cao,Tao Liang,Wensheng Li,Chunyan Cao,Yufeng Wen,Qianglin Hu
Sr [1−3( x + y )/2] Al 2 B 2 O 7 : x Eu 3+ , y Bi 3+ ( x = 0–5 mol% and y = 0–5 mol%) phosphors are synthesized by a solid-state reaction method in air, and their crystal structure, fluorescence lifetime, and luminescence properties are investigated. The optimal composition is determined to be (Sr 0.94 Eu 0.03 Bi 0.01 )Al 2 B 2 O 7 . The PLE band peaks within the range 200–550 nm are due to O 2− → Eu 3+ charge transfer band, 7 F 0 → 5 H 3 , 5 D 4 , 5 L 7 , 5 L 6 , 5 D 3 , 5 D 2 , and 5 D 1 transitions, respectively. The strongest PL band peak under excitation 394 nm light is at ∼615 nm owing to 5 D 0 → 7 F 2 transition of Eu 3+ ion. The PL intensity of Eu 3+ , Bi 3+ co-doped SrAl 2 B 2 O 7 phosphor is 1.3 times that of Eu 3+ doped SrAl 2 B 2 O 7 phosphor due to the energy transfer between Eu 3+ and Bi 3+ ions, which is explained by the energy level diagrams of Bi 3+ and Eu 3+ ions. The CIE chromaticity coordinates of Sr 0.955 Al 2 B 2 O 7 :0.03Eu 3+ and Sr 0.94 Al 2 B 2 O 7 :0.03Eu 3+ , 0.01Bi 3+ phosphors under excitation 394 nm light are ( x = 0.6292, y = 0.3702) and ( x = 0.6284, y = 0.3711), respectively. These phosphors will be used as reddish orange emitting phosphor candidate for white LED with ∼394 nm near ultraviolet LED chip.
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Materials Today Chemistry
·
2025
·
IF 6.7
Ping Liang,Yihao Zheng,Xiaoyan He,Xiaoli Peng,Weilan Huang,Beichen Ying,Xuejie Zhang,Chaofan Hu,Bingfu Lei,Yingliang Liu,Jianle Zhuang
Carbon dot (CD)-based room-temperature phosphorescent (RTP) materials have aroused wide attention owing to their excellent photophysical properties. However, the reports of RTP CDs in information encryption and erasure applications are limited. Herein, a new-type of CD-based RTP material is constructed by incorporating the fluorescent CDs into yttrium hydroxide matrix (CDs@Y(OH) 3 ). For the first time, the Y(OH) 3 as a rigid matrix is used to stabilize the triplet state of the CDs and protect the CDs from oxygen. Furthermore, the intramolecular motions of the CDs are limited, due to the space confinement of the Y(OH) 3 matrix and the formation of hydrogen bonds, thus effectively suppressing the non-radiative transition of triplet excitons and promoting phosphorescence emission. Based on superior optical performance, the CDs@Y(OH) 3 composites are successfully applied in information encryption, and decryption. In addition, by destroying the Y(OH) 3 matrix with acetic acid spray, the phosphorescence is invalidated and the information is erased after decryption. This finding not only provides a new strategy for the preparation of CD-based RTP materials but also reveals the great potential of CDs in information security and protection.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qin Yao,Jian Zou,Jun Yang
The high solar reflectance and good colour performance are requisite for the practical application of the colour-cool pigment. In this work, Ce-doped Yb 3 Al 5 O 12 and (Y, Yb) 3 Al 5 O 12 ceramic pigments were prepared by the sol-gel method. Both Ce 3+ and Ce 4+ ions coexist in the doped pigments. Due to the 4f→5d electron transition of Ce 3+ , the Ce-doped pigments have a selective absorption at around 400–520 nm, which is responsible for the yellow hue. The content of the Ce 3+ ion determines the colour performance of the pigment. The size effect from the smaller Yb 3+ ion results in an increased content of Ce 3+ in the Ce-doped pigments, leading to an improved colour performance. The incorporation of Y 3+ ion can effectively decrease the absorption at 975 nm, thereby enhancing the solar reflectance to 80.6 %, while maintaining good colour performance (Yb 0.7 Y 2.1 Ce 0.2 Al 5 O 12 , L* = 91.40, a* = -4.89, b* = 45.33). In a simulation experiment, the ceramic glaze coating based on the prepared pigment showed a temperature reduction of 5.2 °C compared to the commercial yellow pigment ceramic coating .
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ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Beibei Fan,Xiangyang Zhuang,Jia Wei,Liangyun Bu,Yanwen Liu,Liang Zhang,Mingrui Zhang,Juan Li,Bo Pang
Background Sporothrix globosa ( S. globosa ) is an agricultural activity-related but neglected pathogenic fungus responsible for sporotrichosis. Timely detection is crucial for managing and preventing its spread. However, due to the lack of efficient recognition elements for enriching S. globosa , the current approaches for detecting S. globosa are not simple and/or sensitive enough. This hinders their wider application of fast screening. Results Herein, we successfully prepared immunoglobulin Y (IgY) targeting S. globosa , and developed a rapid and accurate detection method, improving upon current limited and inadequate detection approaches. Our method combined the use of IgY and loop-mediated isothermal amplification (LAMP) to enhance detection sensitivity and specificity simultaneously. The IgY was fabricated on magnetic beads to specifically concentrate S. globosa in samples, while LAMP amplified the captured target after simple boiling DNA extraction. By using our method, as low as 4.66 × 10 2 Cells mL −1 S. globosa was accurately detected in soil and corn straw samples. We further integrated this assay into a portable toolbox for sample-to-result detection in resource-limited areas. By using this toolbox, we have colorimetrically detected soil and corn straw samples contaminated by S. globosa , suggesting the promising on-site detection potential. Significance and novelty A new IgY recognizing S. globosa was prepared. Through the combination of IgY enrichment and LAMP amplification, the detection sensitivity and specificity were improved simultaneously. This method eliminated thermal cycling, simplified the operation, and reduced the analysis time. Compared to existing methods, our approach is more suitable for on-site detection and can significantly improve public health responses to sporotrichosis outbreaks.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Beichen Gao,Limeng Liu,Yinbo Zhao,Jie Wei,Xianghui Yan,Yuhong Chen,Jian Ye,Biao Zhang,Yujin Wang,Feng Ye
α-SiAlON as a solid solution of α-Si 3 N 4 incorporates alien cations (namely Al 3+ and RE v+ , RE = Li, Mg, Ca, and most rare earths) and anion O 2− in the Si 3 N 4 lattice. While effects of the cations on phases, microstructure and mechanical properties of the α-SiAlON ceramics have been well established, possible incorporation of another anion rather than O 2− and its effects are not clear. In this work, Y-doped α-SiAlON ceramics with a nominal composition of Y 0.4 Si 9.6 Al 2.4 O 1.2 N 14.8 were synthesized by hot pressing. Y 2 O 3 in the powder mixture of Si 3 N 4 , AlN, Al 2 O 3 and Y 2 O 3 for synthesis of Y-SiAlON was partially substituted by 2YF 3 to investigate effects of the substitution of F − for O 2− . Density measurement, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Vickers hardness and three-point bending test were performed to characterize the Y-SiAlON ceramics. Thermodynamics of reactions involving YF 3 was also assessed. The results showed that the compositions with 1–50 % 2YF 3 substitution could reach full density, while the 75–100 % 2YF 3 compositions were porous. The SiO 2 impurity present on the Si 3 N 4 particle surface could be eliminated by reaction with YF 3 . When YF 3 was overdosed, formation of YOF liquid would replace the low temperature Al 2 O 3 -Y 2 O 3 -SiO 2 ternary eutectic liquid to hinder α-SiAlON formation, leaving residual Al-O, Al-N, Y-O and Y-F species to form a variety of crystalline intergranular phases. Thin Y-O-F films existed along grain boundaries to impart good corrosion resistance against molten NaOH and better toughening effects to the SiAlON ceramics.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jingjing Wang,Jinchuan Zhao,Zhihui Wen,Xinjie Wei,Junjie Liao,Liping Chang,Kechang Xie
CeY zeolite sorbent was reported to have a high adsorptive desulfurization selectivity for thiophene. However, only the cerium in the supercage, which is larger than the thiophene molecule, is effective for thiophene adsorption. In this case, regulating the cerium location to anchor it more in the surpercage of Y zeolite is an important issue. Herein, the glycine was used as a complexing agent with cerium to control its size, ensuring that the cerium precursor is in the supercage. G 0.1 CeY were prepared by ion exchange technique with glycine and cerium coordination from NaY. The adsorption capacity of sorbents was measured, and their physical and chemical properties were characterized by XRD, SEM, N 2 adsorption/desorption, NH 3 -TPD, and in situ FT − IR. The glycine complexation could effectively control the location of Ce, so that the G 0.1 CeY has the highest content of Ce located in the supercage. Moreover, in order to further explore the influence of zeolite type, HY was used as the raw material to prepared G 0.1 CeHY in the same way. G 0.1 CeHY has a higher desulfurization performance than that of G 0.1 CeY, whereas the Ce content in its supercage is lower. The NH 3 -TPD and Py-FT − IR results that the medium-strong Brønsted acid of the G 0.1 CeHY sorbent is also effectively for the improvement of desulfurization efficiency. The G 0.1 CeHY exhibits the hightest desulfurization effectiveness (51 %) and the highest breakthrough adsorption capacity of 5.42 mg/g.
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MACROMOLECULES
·
2024
·
IF 5.1
Tianfeng Zhou,Haotian Duan,Zhenzhong Li,Yu Jin,Hai Liu,Yuxia Pang,Hongming Lou,Dongjie Yang,Xueqing Qiu
Steric repulsive force is the main dispersion force between cement particles. In order to improve the dispersibility of polycarboxylate superplasticizers (PCEs), we designed and synthesized a new Y-type macromonomer (YPEG) with a molecular weight of Mw = 4100 Da. A long side chain-branched polycarboxylate superplasticizer (YPCE) was successfully synthesized by employing YPEG. Several common comb PCEs having the same side chain density but different lengths, such as PCE2400 and PCE4000, are employed to compare with YPCE for evaluating the dispersion performance. The results show that YPCE has a more excellent dispersion performance than the common PCEs under different water–cement ratios. Additionally, YPCE shows stronger water reduction for concrete. Furthermore, a dynamic light scattering study elucidates that YPCE can increase the adsorbed layer thickness from 5.6 to 7.9 nm, thus forming stronger steric hindrance. Simulations using molecular dynamics are conducted to investigate the influence of the conformational transformation of PCEs from comb-type to Y-type on the adsorption configuration and radius of gyration (Rg) of PCEs on calcium silicate hydrate surface. It is observed that the side chain of YPCE remains in an extended state, and Rg fluctuates little during the fitting process. This study provides a new strategy to enhance the steric hindrance of PCEs.
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