FOOD CHEMISTRY
·
2021
·
IF 7.514
Chao Lin,Pengju Pan,Guorong Shan,Miao Du
Poly(ethylene glycol)- b -poly( ε -caprolactone) diblock copolymers ( PEG- b -PCL) with predesigned hydrophilic/hydrophobic block length ratios have been synthesized and self-assembled to form micelles, then used to emulsify medium-chain triglycerides with an aqueous phase. The morphologies and sizes of PEG- b -PCL copolymer micelles have been characterized by transmission electron microscopy and dynamic light scattering. Interfacial tension testing between micellar dispersions and oil, combined with water contact angle measurements, have been performed to assess the ability of these micelles to adjust interfacial tension and micellar hydrophobicity, respectively. Relationship between the wettability of PEG- b -PCL copolymer micelles and their emulsification properties has been proved through phase diagram, optical microscopic observation, droplet sizes evolution and phase separation behavior of Pickering emulsion samples. Results show that both oil-in-water and water-in-oil Pickering emulsions, as well as water-in-oil-in-water (W/O/W) double-Pickering emulsions, may be controllably prepared through one-step homogenization. Double microstructure of W/O/W Pickering emulsion has proved to be extremely stable during long-term storage.
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Liang Zeng,Ling Xiao,Xiaowen Shi,Mingyu Wei,Jinying Cao,Yangke Long
Herein, Prussian blue analogues@poly(m-phenylenediamine) nanoparticles (PBA@PmPDs) with well-defined core-shell structure were synthesized. The successful coating of poly(m-phenylenediamine) (PmPD) on the surface of Fe y Co 3-y [Co(CN) 6 ] 2 (Fe-Co-Co PBA) was confirmed by SEM, TEM , XRD , TGA , FT-IR and XPS . The catalytic performance of Fe-Co-Co PBA@PmPDs was evaluated by activation of peroxymonosulfate (PMS) for degradation of Rhodamine B (RhB), the effects of different influence factors on the RhB degradation efficiency were investigated, including PMS concentration, temperature, initial solution pH, and co-existing inorganic salts. Cobalt ions leaching and stability of the catalysts were studied, Co ions concentration dissolved into the solution from the solid catalysts at 60 min is reduced by half after the Fe-Co-Co PBA is coated with PmPDs. The RhB removal efficiency is higher than 90% even after four cycles and the nanoparticles still maintain the core-shell structure, indicating that Fe-Co-Co PBA@PmPDs is stabile and reusable. Radical quenching experiments and electron paramagnetic resonance spectra indicate that both SO 4 − and OH are generated during the PMS activation process and SO 4 − is the dominant reactive species. In virtue of its superior catalytic activity, excellent reusability and stability, low metallic ion leaching, Fe-Co-Co PBA@PmPDs could be a promising catalyst for the remediation of contaminated water.
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Siying Du,Nannan Yao,Shungang Liu,Yongzhuo Xu,Jiamin Cao,Wenliu Zhuang,Junting Yu,Nong Wang,Donghong Yu,Fengling Zhang,Ergang Wang
Comprehensive design ideas on the fused-ring donor-core in state-of-the-art acceptor-donor-acceptor (A-D-A) nonfullerene acceptors (NFAs) are still of great importance for regulating the electron push-pull effect for the sake of optimal light-harvesting, frontier molecular orbital levels, and finally their photovoltaic properties. Herein, thieno[3,2- b ]thiophenes were fused in bay-area of naphthalene via six-member-ring connection, resulting in the formation of dihydropyrenobisthieno[3,2- b ]thiophene based octacyclic ladder-type donor core, which was flanked by two 1,1-dicyanomethylene-3-indanone (IC) acceptor motifs with and without 5,6-diflourination, namely PTT-IC and PTT-2FIC , respectively, as novel efficient A-D-A fused-ring electron acceptors (FREAs). Compared with PTT-IC , fluorinated PTT-2FIC possesses narrower optical bandgap of 1.48 eV, better π-π stacking, and its PBDB-T: PTT-2FIC blend film exhibited better morphology, and better hole and electron mobility . As a result, nonfullerene solar cells using PBDB-T: PTT-2FIC as the active layer achieved a decent PCE of 10.40%, with an open-circuit voltage ( V OC ) of 0.87 V, a fill factor (FF) of 0.65, and a much higher short-circuit current ( J SC ) of 18.26 mA/cm 2 . Meanwhile, the PBDB-T: PTT-IC cells delivered a lower J SC of 12.58 mA/cm 2 but a higher V OC of 0.99 V, thus resulting in a PCE of 7.39% due to its wider optical bandgap of 1.58 eV and higher LUMO energy level. These results demonstrated that NFAs based on fused-ring donor core from fusing thieno[3,2- b ]thiophenes with naphthalene via six-member-ring connection are promising for organic photovoltaic applications.
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DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 11
·3670-3684
·
IF 6.177
Chunwang Lv,Mingjiang Hu,Tianhao Yuan,Liqiang Yan,Hongwei Chen
The objective of this work was to investigate and contrast the mechanism of different B-site dopants for catalytic activity and sulfur resistance under equivalent conditions. LaCo1−xMxO3 (M = Fe, Cr, Cu) perovskite-type catalysts were synthesized by a sol–gel method, and the optimized samples were tested for toluene oxidation before and after sulfur aging. The properties of the catalysts were investigated in detail by XRD, FT-IR, N2 adsorption–desorption, H2-TPR, XPS and in situ DRIFTS to elucidate the inner mechanisms of the catalytic reaction and poisoning processes. The results indicated that introducing specific metal cations with a suitable ratio into the B-site of perovskite could improve the catalytic activity and weaken the negative effect of SO2 poisoning. The reasons for the improvement of catalytic activity on different doped catalysts are similar and mainly lie in the change of reduction property, oxidation state of the B-site, and content of oxygen vacancies. However, the mechanism of sulfur resistance caused by different dopants is not identical. The introduction of different metal cations will cause certain differences in some factors such as reducibility, lattice stability, sulfur adsorption and sulfate content, thus leading to the differentiation of sulfur tolerance for doped perovskite catalysts. In this study, the optimization effect of Fe dopant is better than that of Cr and Cu dopants, illustrating that the high stability of the perovskite lattice and the insensitivity to sulfur species are the key factors for its outstanding sulfur resistance. The results provide insights into guiding the practical composition and life cycle optimization of perovskite-type catalysts in the industrial application of removing sulfur-containing VOCs.
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Han Hu,Ruoyu Zhang,Andreia Sousa,Yu Long,Wu Bin Ying,Jinggang Wang,Jin Zhu
Bio-based poly(butylene furandicarboxylate)-b-poly(ethylene glycol) copolymers are successfully synthesized through transesterification and melt polycondensation. The resulted polymers are characterized in terms of structural, thermal and mechanical properties. In addition, for the first time relevant hydrolytic degradation studies for the copolymers applications are systematically conducted in neutral and alkaline conditions. The PEG weight fraction ranges from 10% to 60%, as determined by 1 H NMR. Isothermal crystallization tests show that the copolymers own faster crystallization rate than that of PBF, with melting temperature higher than 120 °C. Water contact angle and water uptake characterizations show that the introduction of increasing amounts of PEG improves the hydrophilic character of the copolymers. Tensile tests clearly indicate that elongation at break drastically increase with PEG content, up to 5 times compared to PBF. From the Notched Izod impact tests, most samples are unbroken in the impact testing, showing excellent impact toughness. It is surprising to find that after water uptake, the PBF-PEGs still have acceptable mechanical properties. The weight loss during hydrolytic degradation is significant after 5 weeks for most of copolymers. With fast hydrolytic degradation rate and good mechanical properties, these copolymers own potential applications in areas like biomedical industry.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Na Wei,Yanan Yan,Ning Sun,Yue Huang,Yang Liu,Wenjuan Dong,Xiaojuan Gong,Jie Zhao,Ruinbing Wang,Shengmei Song,Chuan Dong
Matrix-free room temperature phosphorescence (RTP) materials have generated considerable interest in sensing, anti-counterfeiting and bioimaging due to long lifetime and large Stokes shift. However, spin-forbidden transition and non-radiative transition make RTP challenging to implement. In this work, matrix-free RTP carbon dots (CDs) co-doped with boron and nitrogen were prepared through the microwave-assisted strategy. The CDs realize RTP without any protective matrix. This may be attributed to the stable and rigid structure formed during the heating polymerization process, which can protect the triplet excited state from being quenched by oxygen and water in the air environment. The fluorescence and phosphorescence emission wavelength of the as-prepared CDs were observed at 532 nm and 596 nm with the excitation wavelength of 476 nm and 514 nm, respectively, showing a long afterglow lifetime of 735.3 ms. Nitrogen doping has a crucial effect on the luminescence of RTP, and the increase of nitrogen content facilitates the n-π* transition and improve the efficiency of intersystem crossing (ISC). Importantly, the ratiometric fluorescence method for determining riboflavin has been established based on the Förster resonance energy transfer (FRET) between the CDs (Donor) and riboflavin (Acceptor), with a linear relationship in the range of 9.52–85.71 μM and the limit of detection (LOD) of 19.9 nM. Additionally, the phosphorescent property of the CDs was exploited to demonstrate the potential applications in the field of information encryption.
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DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2023
·
IF 2.1
Xin Yue,Jinsheng Zhao
In this work, two D-A monomers 2,3-di(5-methylfuran-2-yl)-5,7-di(thiophene-2-yl) thiopheno[3,4-b] pyrazine (MFTTP) and 2,3-di(5-methylfuran-2-yl)-5,7-di(4-methoxythiophen-2-yl) thiopheno [3,4-b] pyrazine (MFMOTTP) were first obtained by Stille Coupling reaction, and then the corresponding composites were obtained by in-situ oxidative polymerization method with supercapacitor carbon. The surface morphology, chemical structure, and the element valence states of two materials were characterized by scanning electron microscopy, infrared and XPS, respectively. The specific surface areas of PMFTTP@SC and PMFMOTTP@SC are measured as 756.5 and 954.9 m2/g, respectively. The CV curves were used to determine the initial oxidative and initial reduction potentials, both polymers have a narrow band gap with Eg values below 1.5 eV, electron clouds in the HOMO and LUMO orbits of the polymer are mainly distributed on the aromatic rings of the polymer backbone. Polymer composite materials were used as the anode materials and the lithium sheets were used as counter electrode, and then lithium ion batteries are assembled. The first discharge specific capacities of PMFTTP@SC and PMFMOTTP@SC are 741.9 and 951.3 mAh/g at a current density of 100 mA/g, and as the electrodes are activated in the subsequent cycles, their coulomb efficiencies can reach more than 92% from the third cycle. In contrast, PMFMOTTP with methoxy-thiophene as the donor unit has higher conductivity and lower corresponding impedance due to its stronger electron donating ability and abundant pore structure, which is also more conducive to the lithiation/delithiation redox process.
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DOI
高影响因子
ACS SYMPOSIUM SERIES
·
2012
·
IF 0
Pingwei Liu,Weiqiang Lu,Wen-Jun Wang,Bo-Geng Li,Zhibin Ye,Shiping Zhu
Amphiphilic diblock copolymers consisting of linear or hyperbranched polyethylene (PE) and poly[oligo (ethylene glycol) methyl ether methacrylate] (POEGMA) were synthesized via atom transfer radical polymerization (ATRP) initiated by PE macroinitiators (MIs). The MIs contained an end-capping 2-bromoisobutyryl group per chain. Their linear and hyperbranched structures were first synthesized through a ‘‘living’’ polymerization of ethylene under pressure of 27.6 and 1 atm, respectively, using Pd–diimine catalyst, [(ArN=C(Me)–(Me)C=NAr)Pd(CH2)3C(O)O(CH2)2OC(O)C(CH3)2Br]+ SbF6− (Ar = 2,6-(iPr)2C6H3) (1). In the ATRP of OEGMA, the effect of solvent, ligand, and MI concentration on the block copolymer formation were studied. The macroinitiator and block copolymer samples were characterized by GPC, 1H NMR, and DSC measurements. All samples possessed well-defined topologies/structures with narrow molecular weight distributions and controlled lengths of PE and POEGMA blocks. The block structures were verified by an intrinsic viscosity study. Micelle formation and its temperature sensitivity were also analyzed by dynamic light scattering.
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DOI
MOLECULES
·
2025
·Vol. 30
·期 21
·4215
·
IF 4.6
Yukun Tang,Pingping Yang,Jinpu Xie,Tengfei Duan,Zengmin Tang,Yao Liu,Rui Zhang,Haihu Tan,Jingjing Du,Lijian Xu
In recent years, cadmium sulfide (CdS) has been widely investigated due to its excellent photocatalytic performance. However, its practical application in pollutant treatment is limited by its narrow photoresponse range and susceptibility to photocorrosion. Herein, we design a unique four-layer core–shell structure NaYF 4 :Yb 3+ ,Er 3+ @NaYF 4 @CdS@Au (CSNPs@CdS@Au), with an inert NaYF 4 shell coating on NaYF 4 :Yb 3+ ,Er 3+ (CNPs) to form NaYF 4 :Yb 3+ ,Er 3+ @NaYF 4 (CSNPs) and CdS depositing on CSNPs (CSNPs@CdS); Au nanoparticles are loaded on CdS (CSNPs@CdS@Au). Compared with CdS (9.81%), CSNPs (5.0%), CSNPs/CdS (6.9%), and CSNPs@CdS (81.0%), CSNPs@CdS@Au degrades 97.7% Rhodamine B (RhB) within 15 min, exhibiting superior photocatalytic performance, attributable to two key factors: (1) the NaYF 4 inert shell encapsulation amplifies upconversion (UC) luminescence intensity by suppressing surface quenching; and (2) the electron transfer between Au nanoparticles and CdS effectively promotes spatial separation of photogenerated charge carriers and increases reactive active sites. Additionally, after five degradation cycles, CSNPs@CdS@Au still maintains a 93.25% degradation rate for RhB, confirming its excellent stability. This remarkable stability is attributed to the uniquely designed multilayer core–shell architecture, which significantly enhances structural integrity through physical isolation effects. This study establishes a material preparation strategy for efficient photocatalytic pollutant degradation.
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jialin Hu,Lingling Guo,Xinxin Xu,Hua Kuang,Liguang Xu,Liqiang Liu,Chuanlai Xu,Hongyu Zhang,Maozhong Sun
Food fraud practices, such as milk adulteration, exacerbate allergy risks by introducing undeclared allergens, primarily β-lactoglobulin (β-Lg). Therefore, the effective detection of β-Lg in food is crucial for ensuring consumer safety. In this study, we screened hybridoma cell lines 11F10 and 4G1, which recognized β-Lg variants A (β-Lg A) and B (β-Lg B). Genes of these hybridoma cell lines were extracted, amplified, and cloned into expression vectors to produce recombinant antibodies (rAbs). Using rAbs 11F10 and 4G1, colloidal gold-based immunochromatographic strips were developed for detecting β-Lg A and B in dairy products. The strips exhibited a visual limit of detection of 200 μg/kg in cheese and amino acid formulas, and 200 ng/mL in raw milk. The results of molecular docking indicated that the critical amino acid residues for 11F10 were Asp57, Tyr32, and Arg49, whereas those for 4G1 included Tyr101, Tyr106, and Tyr49.
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DOI
PubMed
高影响因子
COMBUSTION AND FLAME
·
2023
·
IF 4.4
LongJin Du,Jianzhong Liu,Binghong Chen,ZhiHao Sun,WeiJuan Yang
B/JP-10 suspension fuel has very high energy density and high application prospects, but energy release during its actual combustion is incomplete. In this study, the surfaces of boron nanoparticles were modified by coating the particles with LiF and AP using a two-solvent method. Thermogravimetric experiments show that the ignition temperature of boron decreases from 772°C to 599°C when the LiF coating amount is 20 wt%. In a laser ignition experiment, the AP-modified B/JP-10 suspension fuel displayed a relatively obvious "microburst" phenomenon at the end of the combustion process . The "microburst" intensifies as the amount of AP coating increases; this behavior has positive implications for the release of energy from the boron in the fuel. The oxidation of boron in 10 wt% LiF-modified fuel increased from 26.35% to 36.22% without an increase in the ambient oxygen partial pressure . AP modification increases not only the oxidation rate of boron in the fuel but also the amount of oxidizing gas produced by decomposition, and this increases the burning intensity of JP-10. LiF and AP modification can destroy the shell layer of the agglomerates formed by the combustion of suspended fuels. LiF makes it difficult to close the shell layer by reacting with B 2 O 3 to form easily sublimated substances and flaky crystals. AP breaks the shell structure due to the high pressure generated by the "microburst", thus forming a porous configuration on the surface of the agglomerate.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Liping Zhang,Guohong Wang,Zhenzhong Xiong,Hua Tang,Chuanjia Jiang
A combined hydrothermal-calcination approach is developed to synthesize hierarchical β -Bi 2 O 3 /g-C 3 N 4 direct Z-scheme photocatalyst with enhanced visible light photoactivity for Rhodamine B (RhB) degradation. First, Bi 2 O 2 CO 3 microflowers were hydrothermally prepared using Bi(NO 3 ) 3 ·5H 2 O as feedstocks, and then a series of β -Bi 2 O 3 /g-C 3 N 4 direct Z-scheme photocatalysts were synthesized via a facile calcination method using Bi 2 O 2 CO 3 and g-C 3 N 4 as precursors. The samples were systematically characterized by various characterization technologies including X-ray diffraction, scanning and transmission electron microscopes, Fourier transform infrared spectroscopy and N 2 absorption-desorption equipment. It was found that the g-C 3 N 4 content in the precursors played a key role in affecting the photocatalytic activity of the final products. The β -Bi 2 O 3 /g-C 3 N 4 heterojunction exhibited higher photocatalytic activity than single active components ( β -Bi 2 O 3 and g-C 3 N 4 ), indicating the presence of a synergistic effect between two active components in β -Bi 2 O 3 /g-C 3 N 4 heterojunction. Among all as-prepared catalysts, the 70 wt.% g-C 3 N 4 /Bi 2 O 2 CO 3 exhibits the highest activity for RhB degradation, and the apparent reaction rate constant k (42.2 × 10 −3 min −1 ) is 3.1 and 1.7 times as high as that of pure β -Bi 2 O 3 (13.5 × 10 −3 min −1 ) and g-C 3 N 4 (25.2 × 10 −3 min −1 ), respectively. The enhanced photocatalytic performance of β -Bi 2 O 3 /g-C 3 N 4 heterostructure photocatalysts is mainly due to the high surface area, closely contacted interfaces between the β -Bi 2 O 3 and g-C 3 N 4 component, and the formation of direct Z-scheme structure in the β -Bi 2 O 3 /g-C 3 N 4 composites.
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高影响因子
危险品化学品经营许可证（带存储）