APL Materials
·
2024
·Vol. 12
·期 4
·
IF 5.3
Lin Jia,Wang Shuai,Jin Hua,Cui Shuyuan,Wang Rongwen,Yang Yihang,Huang Guimei,Wang Jinhuo
The preparation of ceramic materials with complex porous structures through photopolymerization-based 3D printing requires the development of stable and printable slurries. In this study, zirconium acetylacetonate was incorporated into the thiol vinyl organosilicon prepolymer to create a photosensitive Si–Zr–O–C slurry. Regarding the natural bone structures and the Tyson polygon principle, a gradient pore structure was designed and then printed using a digital light processing 3D printer. After printing, the effects of sintering temperatures on the phase composition and structure of Si–Zr–O–C ceramics were systematically investigated. Subsequently, a comparative analysis of structure and properties was performed on sintered samples with different zirconium acetylacetonate contents. The results revealed that the sample containing 30 wt. % zirconium acetylacetonate exhibited a higher compressive strength of 9.70 ± 0.28 MPa and a lower room temperature thermal conductivity of 0.528 W m −1 K −1 . This study confirmed the significant potential of using 3D printing technology to prepare Si–Zr–O–C precursor ceramics with a porous structure.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Nuclear Materials and Energy
·
2020
·
IF 2.213
Xinyi Yang,Liangliang Song,Bo Chang,Qi Yang,Xiaodong Mao,Qunying Huang
The low solubility of gadolinium (Gd) limits its application in iron-based neutron shielding alloys. In this study, a high content of Gd up to 7.87 wt.% was added into 316L stainless steel by mechanical alloying (MA) of Gd 2 O 3 with 316L powder. Neutronics calculation results showed that the shielding efficiency of 0.2 mm thick 7.87 wt.% Gd-316L alloy was equivalent to that of 33 mm thick 316L for thermal neutrons. Microstructure analysis indicated that Gd-Si-O particles with an average size of 12.5 nm were uniformly dispersed in the matrix. It revealed that Gd 2 O 3 dissolved into the 316L matrix during MA and re-precipitated at around 780 °C as Gd 2 SiO 5 by XRD and TG-DSC. This study provides a novel Gd-containing alloy designed to achieve integration of structural alloys with good neutron shielding function for future application.
研究领域:
材料科学
·
核工程
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DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Nan Yin,Ruihuan Zhao,Jie Zhang,Dingding Yang,Zhimin Guo,Rui Liu,Xin Yao
Abnormal O-linked N-acetylglucosamine (O-GlcNAc) concentrations have been associated with many diseases, but the lack of accurate detection method limited O-GlcNAc to be used as a biomarker in clinical diagnosis. Then O-GlcNAc transferase (OGT) has drawn researchers’ attention as it closed related to the level of O-GlcNAc and be considered to be a promising new target for diseases diagnosis. Nevertheless, the existing OGT detection methods are either need labeling or the sensitity can not meet the needs of clinic testing. Herein, a label-free and sensitive SPR biosensor was developed for accurate detection of OGT based on a multi-functional peptide. The designed peptide contains three recognition sites, one is the cleavage site of protease K, one is the O-GlcNAcylated site by OGT, and another is six histidine which be used as the signal report probe to recognize Ni 2+ . The immobilized peptide would be cleavaged by proteinase K, then the His-tag residue part will leave the surface of Au film, resulting less His-tag could bind to Ni 2+ and a small SPR signal would be record. If the peptide is O-GlcNAcylated by OGT, the cleaving reaction would be limited due to the adjacent site of O-GlcNAcylation. Then more His-tag can be left on the Au film and a bigger SPR signal could be record, this signal is associated with the concentration of OGT. Utilizing the change of the peptide configuration as a signal report probe for OGT detection not only avoids labeling of peptide, but also makes the method more sensitive. The determination linear range of OGT is from 2.00 × 10 −13 to 5.00 × 10 −8 M with a detection limit of 1.19 × 10 −13 M, and the separation of two enzyme reactions ensured the high selectivity of the method. Finally, the sensing system was successfully used for OGT detection in blood samples with satisfied recovery. In summary, the label-free SPR platform for accurate detection of OGT in real samples is helpful to promote OGT serve as a biomarker for early clinical diagnosis of O-GlcNAc related diseases.
研究领域:
生物化学
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分析化学
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生物传感器
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临床诊断
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DOI
PubMed
高影响因子
CHINESE CHEMICAL LETTERS
·
2013
·
IF 1.21
Ying-Peng Zhang,Ai-Hong Shi,Yun-Shang Yang,Chun-Lei Li
Nanoparticle Fe 3 O 4 encapsulated CuO, as a heterogeneous catalyst, is a facile system for the synthesis of diaryl ethers by the cross-coupling reaction of various substituted aryl halides with various substituted phenols, which avoids using any type of expensive ligand and can be recovered from the reaction mixture by using a simple magnet. Moreover, this catalyst can be reused three times with high catalytic activity.
研究领域:
化学
·
催化材料科学
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DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 16
·2472-2477
·
IF 2.7
Chenhao Zhao,Xingdan Wang,Jing Wu,Yeli Hu,Qiwei Zhang,Qi Zheng
Sialic acids are a family of monosaccharides that share a nine-carbon backbone and a carboxyl group. A recent derivatization method based on 3-nitrophenylhydrazine (3-NPH) provides a mild chemical labeling technique for biomolecules containing carbonyl or carboxyl groups. In this study, we utilized 3-NPH to label sialic acids via a two-step derivatization process. The derivatized species can produce a common reporter ion corresponding to C1–C3 with two labels, and a fragment differentiating between Neu5Ac, Neu5Gc, and KDN. This method is compatible with O-acetylated sialic acids and provides high sensitivity to Neu5Gc and KDN, and since the utilization of dual labeling significantly enhances the hydrophobicity of derivatives, it can effectively mitigate matrix effects when combined with parallel reaction monitoring technology. Negative-ion tandem mass spectrometry (MS/MS) analysis reveals a distinctive fragmentation profile for the 4-O-acetylated species, while the other sialic acids yield similar MS/MS spectra with a high abundance of reporter ions. Using the reporter ion as a transition, this analytical strategy is effective for analyzing complex biological samples. For example, it was successfully employed to quantify sialic acids in the intestinal tissues of several carp species, demonstrating its potential in sialylation research.
研究领域:
分析化学
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糖生物学
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DOI
PubMed
高影响因子
NORDIC PULP & PAPER RESEARCH JOURNAL
·
2022
·Vol. 37
·期 1
·205-211
·
IF 1.595
Hanhan Yang,Jinjie Zhang,Yingping Qi,Yongfeng Shen,Hua Li
To enhance the strength of paper cultural relics and prolong the life of paper cultural relics, it is an urgent need to prepare new material for preservation and protection of paper. In this paper, chitosan quaternary ammonium salt/HEC-acrylate was synthesized with O-hydroxypropyl trimethyl quaternary ammonium salt chitosan (O-HACC) and Hydroxyethyl Cellulose (HEC)-acrylate emulsion, the synthesized materials has multiple functions, such as deacidification, reinforcement, anti-mildew and antibacterial etc. The synthesized new materials were applied on paper, and their protective effect was evaluated by testing the mechanical and optical properties and antibacterial properties of the paper. The results showed that when the mass concentration of O-HACC was 0.6 %, the tensile strength, folding times and tearing strength of the paper coated with protective solution were improved to a certain extent, while the optical properties and appearance of the paper remained basically unchanged. Meanwhile, the paper also had certain anti-mildew and bacterial resistance.
研究领域:
材料科学
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文物保护
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DOI
高影响因子
ChemCatChem
·
2025
·
IF 3.9
Zhenfeng Bian,Yun Zhao,Xuejing Huang,Zhenmin Xu,Yang Liu,Hanwen Chen,Jing Yuan,Ting Zhang,Shiying Tang,Huangrong Wang,Wenshu Zhao,Haifang Mao
The involvement of peroxymonosulfate (PMS) in advanced oxidation processes represents a promising technology that can effectively reduce recalcitrant pollutants. In this study, taking advantage of the abundant and flexibly tunable terminal μ3-O groups of UiO-66, the high-efficient Mn modified UiO-66(Mn@UiO-66) was were prepared by direct complexation between μ3-O groups and Mn ions. It was optimized that the Mn@UiO-66 exhibited excellent catalytic performance to activate PMS for bisphenol A (BPA) degradation. Quenching experiment and electron paramagnetic resonance (EPR) showed that the non-free radical pathway was dominant in BPA degradation, and singlet oxygen (1O2) was the main active species. In addition, an abnormal pollutant dependent PMS activation behavior was revealed; UiO-66 enriched with μ3-O promotes PMS activation via the μ3-O-mediated Zr-O-Mn electron transfer pathway, boosting performance for selective degradation of target pollutants from water. Interestingly, the presence of multiple coexisting cations and anions have little effect on the BPA degradation rate and PMS decomposition. The Mn@UiO-66/PMS system could also degrade effectively various organic pollutants, indicating its potential practical application value.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
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2025
·
IF 3.6
Shufang Wu,Zhiqian Long,Yushu Zhang,Ting Zhang,Qinghong Luo,Xiaoxuan Liu,Zhiquan Li
Using low catalyst loadings while maintaining precise polymer property control is a critical challenge in the O-ATRP field. Herein, we report a novel O-ATRP system utilizing 1-bromopyrene (Py-Br) as a photoredox catalyst, enabling controlled polymerization of methyl methacrylate (MMA) at an ultra-low loading of 10 ppm. When combined with ethyl α -bromophenylacetate (EBPA) as an initiator, this system produces polymers with a molecular weight distribution of 1.48 and an initiation efficiency of 66.7%. Mechanistic studies, including UV–Vis spectroscopy, fluorescence spectroscopy, cyclic voltammetry, and time-resolved fluorescence measurements, elucidate the photophysical and photochemical properties of Py-Br in O-ATRP. Kinetic analyses reveal first-order polymerization kinetics, while the linear increase of molecular weight with monomer conversion and low dispersity values indicate good control over the polymerization. The living nature of the system is further confirmed through successful chain extension experiments. This Py-Br-catalyzed O-ATRP system explores the feasibility of conducting polymerization at lower catalyst concentrations, offering insights into approaches for reducing catalyst usage in polymer synthesis. Graphical Photoinduced metal-free ATRP of MMA using ppm-level Py-Br as the organic photocatalyst.
研究领域:
高分子化学
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材料科学
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光催化
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2016
·Vol. 34
·期 7
·657-661
·
IF 1.872
Zhengyi Li,Jinbei Yan,Yue Yin,Zhihui Zhang,Zhiming Wang,Defeng Xu,Xiaoqiang Sun
A simple and nontoxic fluorescent chemosensor of di- O -methyl curcumin has been prepared from curcumin. The sensor exhibited selective and sensitive fluorescent responses toward Al 3+ over a wide range of metal ions, such as Mn 2+ , Ce 3+ , Pt 2+ , Sn 4+ , Hg + , Sb 3+ , K + , Ca 2+ , Mg 2+ , Ba 2+ , Cu 2+ , Ni 2+ , Na + , NH 4 + , Ag + , Pb 2+ , Zn 2+ , Fe 2+ , Fe 3+ , Hg 2+ and Cr 3+ in ethanol/water. The free ligand showed quite weak fluorescence emission due to the isomerization of CO double bond in the excited state, however, after addition of Al 3+ , fluorescence emission results in a prominent fluorescence enhancement.
研究领域:
分析化学
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生物化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Hailong Tang,Yongqing Ma,Ganhong Zheng,Chuhong Zhu,Meiling Wang,Yilin Lu,Xiao Sun
Photocatalytic CH 4 conversion to CH 3 OH under mild conditions is undoubtedly an efficient strategy to realize CH 4 upgrading. In this work, in-situ formed highly reactive Fe IV =O complex with a bound Cl axial ligand was detected at ambient temperature and its contribution to CH 4 photoxidation to CH 3 OH was deeply investigated. Under optimized experimental condition, a high CH 3 OH yield of 3026.1 mmol mol Fe −1 (6.76 mmol g cat −1 h −1 ) with selectivity of 73.6 % was obtained during 8 h. Isotope labeling mass spectroscopy experiments manifested that O 2 was the only source of oxygen in products. The formation of Cl-(H 2 O) 4 Fe IV O complex was confirmed using low-temperature electron spin resonance spectroscopy and cryogenic Raman spectroscopy (ν(Fe O) = 828 cm −1 ). Through density functional theory (DFT) calculation, we showed that the Cl axial ligand acts as an “electron reservoir” during CH 4 conversion, i.e., electron acceptor during the process of CH 4 oxidation to CH 3 OH, while electron donor in CH 3 OH desorption. This not only lowered C-H cleavage energy, but also facilitated CH 3 OH desoption and inhibited overoxidation. As far as we know, Cl-(H 2 O) 4 Fe IV O is the first detected Fe IV O complex generated directly from O 2 and Fe 3+ at ambient temperature.
研究领域:
化学
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环境科学
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产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Ruoning Zhang,Yanhui Zhang,Jingjing Yu,Yanxiang Gao,Like Mao
Understanding the thermal behavior of emulsions with complex structures was crucial for wider applications. However, the correlations between the structural units and emulsion properties at different temperatures are poorly understood. Herein, W/O emulsions stabilized by oleogels and nanoparticles were studied during thermal process, and dynamic interactions among the structural units occurred at micro-, meso-, and macroscales. Results revealed that the thermal behavior of W/O emulsions shifted from stable (25–50 °C) to sub-stable (50–60 °C), and unstable states (60–80 °C). Microstructural analysis confirmed that the particles desorbed from the interface and dissolved in the oil phase after heating, causing water droplet coalescence in the emulsions. This was attributed to the enhanced hydrophobic interactions between the particle dispersions and the oleogel, as the contact angle and interfacial tension were decreased during heating. At the mesoscale, the T 2 values of oleogels and nanoparticle dispersion were increased more than three times from 25 °C to 80 °C, leading to the higher mobility of protons in emulsions. At the macroscale, the viscoelastic modulus of emulsions at higher temperature were higher, together with less energy dissipated by friction and increased nonlinear response. Furthermore, the temperature-induced transformation of emulsion stability can be reversibly controlled at least three times. Insights into the complex behavior of emulsions across different temperature stages can inspire the design of emulsions for specific applications.
研究领域:
食品科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
·
IF 5.8
Yang-Yang Xu,Xing Fan,Feng-Yun Ma,Hai-Xu Zou,Xian-Yong Wei
Directly converting lignite into arenes as commodity chemicals and drop-in fuels is a highly desirable target for researchers. However, this is severely limited by the presence of stable inter unit C-O linkages in lignite. Herein, a highly active catalyst, Co-MoS 2 , has been designed and prepared to be used for the selective catalytic cleavage of inter unit C-O bridged bonds (BBs) in the conversion of Naomaohu (NMH), a lignite, to yield arenes. Both catalytic hydrogenation conversion (CHC) and thermal dissolution (a non-catalytic process, named NCHC) of NMH were conducted using n-hexane as the solvent. The soluble fractions from the first stage of NCHC (SF NCHC-1 ) and CHC (SF CHC-1 ), as well as the second stage of NCHC (SF NCHC-2 ) and CHC (SF CHC-2 ) were obtained using the same solvent. After the first-stage catalytic treatment, the relative contents of arenes and alkanes in SF CHC-1 increased by 16.7 % and 9.3 %, respectively, compared to those in SF NCHC-1 , and the relative content of oxygen-containing compounds (OCCs), such as alcohols, phenols , esters, ketones , acids, and furans, decreased by 13.2 %. For the second-stage conversion, the relative contents of arenes and alkanes in SF CHC-2 were 53.5 % and 15.5 % higher than those in SF NCHC-2 , and the relative contents of OCCs was only 6.6 % in SF CHC-2 . The catalytic mechanisms of cleavage of C-O BBs and deoxygenation were proposed based on the CHC of model compounds and density functional theory (DFT) calculation. The adsorption of OCCs and the activation of released hydrogen radical (H·) by Co-MoS 2 , followed by H· addition to the carbon atom connected to oxygen in C-O BBs and oxygen-containing functional groups, are crucial for the cleavage of C-O BBs and formation of deoxygenated compounds, particularly arenes.
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）