COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Haixia Zhang,Kaidi Zhao,Jiaping Chen,Renfei Chu,Xinru Xiang,He bian,Chenguang Ding
The polymerizable monomer ETPTA as the inner phase and Tween 80 as the emulsifier to construct O/W emulsions, which could be polymerized to solid polymers by UV-irradiation with the advantages of environmentally friendly and easy preparation. The stirring speed is an important factor affecting the mean size of emulison droplets and solid particles. Increasing the stirring speed is beneficial for the emulsion stabilization due to the small emulison droplets, which can construct smaller solid particles as the carriers of the catalytic active centers. PdNPs as functional metal nanomaterials are selected as the active centers attributed to the peroxidase activity, which can adsorb on the polymer surface (PdNPs@polymer) because of the electrostatic interactions. The analysis of PdNPs@polymer confirm the PdNPs are well-distributed at the polymer surface and have no noticeable aggregation. PdNPs@polymer can reduce 4-NP to 4-AP in the aqueous solution showing remarkable catalytic activity. The carrier polymer particles prepared with the largest stirring speed loaded with PdNPs has the best catalytic activity compared with the low stirring speeds. PdNPs@polymer with higher stirring speed has outstanding catalytic activity due to the numerous emulsion droplets and corresponding solid particles, which are contributed to the loading of PdNPs and improve the catalytic performance. Our findings of the novel catalyst composites are instructive in providing technical guidance for environmental remediation applications with better catalytic activity and being environmentally friendly.
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Journal of Saudi Chemical Society
·
2016
·Vol. 21
·期 3
·315-323
·
IF 1.978
Pei-Yi Wang,Ling Chen,Jian Zhou,He-Shu Fang,Zhi-Bing Wu,Bao-An Song,Song Yang
In this paper, a variety of 1-aryl-4-hydroxy-1 H -pyrrol-2(5 H )-one derivatives bearing 1,3,4-oxadiazole moiety were designed and synthesized. Preliminary bioassays suggested that these compounds not only exhibited favorable antibacterial activity toward plant pathogenic bacteria including Xanthomonas oryzae pv. oryzae ( Xoo ), Ralstonia solanacearum ( R. solanacearum ), and Xanthomonas axonopodis pv. citri. ( Xac ), but also demonstrated certain curative and protective activities against Tobacco mosaic virus (TMV). Further studies revealed that compounds 8a and 8l exerted the best inhibition effect against Xoo with the half-maximal effective concentration (EC 50 ) values of 8.6 and 7.3 μg/mL, respectively, which were better than that of commercial agricultural antibacterial bismerthiazol (EC 50 = 92.6 μg/mL). Given the above results, this kind of compounds can be further studied and explored as alternative antibacterial agents.
研究领域:
药物化学
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农业化学
·
抗菌剂
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病毒学
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有机合成
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 48
·485502
·
IF 3.953
Muhammad Azhar Hayat Nawaz,Mahmood Hassan Akhtar,Jia Ren,Naeem Akhtar,Akhtar Hayat,Cong Yu
In this work, an electrochemical immunosensor based on black phosphorus nanosheets (BPNS)/poly(allylamine hydrochloride) (PAH) nanocomposite modified glassy carbon electrode was developed for the detection of ovarian cancer biomarker HE4. PAH has been applied to retain BPNS in its original honeycomb structure and to anchor biomolecules electrostatically on the transducer surface. The as synthesized nanocomposite was characterized by zeta potential analysis, scanning electron microscopy, x-ray photoelectron spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy. Subsequently, the performance of the electrochemical immunosensor was evaluated through cyclic voltammetry, differential pulse voltammetry and electrochemical impedance spectroscopy. Under the optimal condition, the developed electrochemical immunosensor permitted to detect HE4 with a linear range of 0.1–300 ng ml−1 and a detection limit of 0.01 ng ml−1. The developed sensor exhibited good selectivity and specificity to HE4 with negligible interference effect from common biomolecules like bovine serum albumin, lysozyme, protamine, glucose, fructose, hemoglobin and fetal bovine serum. Further, practical application of developed electrochemical immunosensor was demonstrated in spiked human serum which showed satisfactory recovery percentages.
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Defence Technology
·
2023
·
IF 5.1
Er-hai An,Xiao-xia Li,Cun-juan Yu,Ying-xin Tan,Zi-jun Fan,Qing-xia Li,Peng Deng,Xiong Cao
Fe/N-based biomass porous carbon composite (Fe/N-pCarbon) was prepared by a facile high-temperature carbonization method from biomass, and the effect of Fe/N-pCarbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied. Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors. Fe/N-pCarbon was prepared simply by the high-temperature carbonization method. It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4. The heat release of DAP-4/Fe/N-pCarbon by DSC curves tested had increased slightly, compared from DAP-4/Fe/N-pCarbon-0. The decomposition temperature peak of DAP-4 at the presence of Fe/N-pCarbon had reduced by 79°C from 384.4°C (pure DAP-4) to 305.4°C (DAP-4/Fe/N-pCarbon-3). The apparent activation energy of DAP-4 thermal decomposition also had decreased by 29.1 J/mol. The possible catalytic decomposition mechanism of DAP-4 with Fe/N-pCarbon was proposed.
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CHEMICO-BIOLOGICAL INTERACTIONS
·
2022
·
IF 5.168
Yudong Yin,Li Sun,Lixin Sheng,Liqiong Zhang,Jingjing Liu,Xiaoan Wen,Weibin Mo,Quande Wang,Keguang Cheng
In order to discover more effective and less toxic drugs in the field of anti-tumor, the backbone structure of 17 β -estradiol was modified, and 11 target compounds were synthesized. Compounds 5 and 10 , which exhibited better anti-tumor activity and higher selectivity (more than 10-fold), were chosen for further biological investigation. Flow cytometry results indicated that 5 and 10 could arrest MCF-7 cells in the G2 phase and induce apoptosis . Immunohistochemical analysis revealed that 5 and 10 could bind to the estradiol receptor alpha in MCF-7 cells. Western blotting and real-time PCR assays were performed to detect the effects of compounds on apoptosis-related targets at the protein and gene levels. These results showed that both 5 and 10 could dosed-dependently increase the expression of Apaf-1, Bax, caspase-3,8,9 and reduce the expression levels of the anti-apoptotic factors Bcl-2 and Bcl-xL. Besides, the Human apoptosis array assay demonstrated the expression level of death receptor Trail R2/DR5 was upregulated obviously while the expression of TNF R1, IAPs and Hsp27/60/70 were downregulated. On the whole, 5 induced MCF-7 cell death through the endogenous pathway in mitochondria and the exogenous pathway with death receptor Trail R2/DR5.
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JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 2
·1-15
·
IF 2.8
Qin Y. X.,Wang C.,Li K. Y.,Jin B. R.,Chen Y. R.,Ren L.,Zhang M. Y.,Zhang H. X.
Considering the current research background of environmental problems and shortages of petroleum resources aiming at proposing the “green” polymer blend with good degradability and properties similar to oil-based merchandise currently on the market, in the present study, two series of fully biodegradable blends consisting of PBS/P34HB (PBP) and PBS-g-GMA/P34HB (PGP) have been successfully fabricated by a simple and environmental-friendly processing methodology. In this work, the resulting biodegradable blends are in detail studied from the mechanical, thermal, crystallization, and morphology points of view. To improve the miscibility and enhance the interfacial adhesion between both phases of poly(butylene succinate) (PBS) as the matrix and poly (3-hydroxybutyrate-co-4-hydroxybutyrate) (P34HB) as the modifier, with consequent improvement in material mechanical properties, glycidyl methacrylate (GMA) is grafted on PBS via reactive blending in the process. The incorporation of 10wt% P34HB into the blend promotes a dramatic increase of 614% in the Izod impact strength. The crystallization temperature (Tc) of PGP is 87.78℃ when 30wt% P34HB is added, which is 25% higher than that of pure PBS and 11% higher than that of the PBP blend. Meanwhile, the crystallinity of PGP is 30.12%, 47%, and 37% decline compared to pure PBS and PBP, respectively. Rheological results show that storage modulus, loss modulus, and complex viscosity improve significantly with the increase of P34HB amount, indicating that the enhancement of melt strength is beneficial to the processing and forming of the materials.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2022
·Vol. 224
·期 2
·2200305
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IF 2.996
Haoting Zheng,Kun Wu,Jun Shi
The preparation of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film is proposed as a simple and industrialized approach. PEDOT:PSS is diluted with deionized water, tetrahydrofuran, dimethyl formamide, and dimethyl sulfoxide before being dry and suction filtered to create a membrane. After treatment with polar organic solvent, the in-plane thermal conductivity of sample is increased from 1.386 to 2.375 Wm −1 K −1 . The electrical conductivity increases from 1.8 to 592 S cm −1 . The structural modifications of PEDOT:PSS considerably increase the heat conductivity, according to UV, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and atomic force microscopy (AFM) characterization. This modification improves the polymer's thermal conductivity by increasing the contact force between molecules and changing the long chain conformation of polymers.
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ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Mingyu Li,Yuhan Ma,Jingjing Jiang,Tianren Li,Chongjun Zhang,Zhonghui Han,Shuangshi Dong
Heterogeneous photo-Fenton technology has drawn tremendous attention for removal of recalcitrant pollutants. Fe-based metal-organic frameworks (Fe-MOFs) are regarded to be superior candidates in wastewater treatment technology . However, the central metal sites of the MOFs are coordinated with the linkers, which reduces active site exposure and decelerates H 2 O 2 activation. In this study, a series of 2, 5-dioxido-1, 4-benzenedicarboxylate (H 2 DOBDC)-functionalized MIL-100(Fe) with enhanced degradation performance was successfully constructed via solvothermal strategy. The modified MIL-100(Fe) displayed an improvement in photo-Fenton behaviors. The photocatalytic rate constant of optimized MIL-100(Fe)-1/2/3 are 2.3, 3.6 and 4.4 times higher compared with the original MIL-100(Fe). The introduced H 2 DOBDC accelerates the separation and transfer in photo-induced charges and promotes Fe(II)/Fe(III) cycle, thus improving the performance. •OH and •O 2 − are main reactive radicals in tetracycline (TCH) degradation. Dealkylation, hydroxylation, dehydration and dealdehyding are the main pathways for TCH degradation.
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CATALYSIS TODAY
·
2022
·
IF 6.562
Wenwen Cong,Changyou Xu,Yahang Mu,Qiang Li,Liancheng Bing,Fang Wang,Dezhi Han,Guangjian Wang
In this work, hierarchical SAPO-34 supported PtCo bimetallic catalysts with different Pt/Co ratios were prepared by impregnation method. The obtained PtCo/SAPO-34 catalysts displayed high catalytic activities and durability for the dehydrogenation of ammonia borane (AB). Among them, Pt 1 Co 5 /SAPO-34 catalyst delivered the highest hydrogen generation activity with a turnover frequency (TOF) of 262 mol H 2 ( mol Pt ∙ min ) − 1 at 303 K as well as excellent catalytic activity in catalytic hydrogenation of 4-nitrophenol (4-NP) by coupling with hydrolytic dehydrogenation of AB, due to the electron interaction of Pt and Co in PtCo alloy and the high metal dispersion and exposure of Brønsted acidic sites on SAPO-34 support. Moreover, it is noteworthy that the prepared Pt 1 Co 5 /SAPO-34 catalyst also exhibited superior recycle stability, with 81% of the initial TOF value after five runs of hydrolysis reaction.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 16
·7385-7394
·
IF 3.925
Xia Xu,Meirong Fu,Min Yang,Bing Hu,Jitao Yang,Wenjun Gui,Jinxiu Guo
4-Nitrophenol (4-NP) is one of the main toxic water pollution substances. Most 4-NP fluorescence detection methods are based on the change in the fluorescence intensity of a single emission peak, which has low sensitivity, accuracy, and narrow analytical ranges. Herein, NaYF4:Yb3+(58%),Tm3+@NaYF4@Au were designed and synthesized for the quantitative detection of 4-NP due to the fluorescence intensity ratio of two upconversion emission peaks, the analytical range is 0.01–100 μg mL−1 and the detection limit is 0.01 μg mL−1. In addition, 1.66 nm Au nanoparticles randomly distributed on the surface of composite nanomaterials can effectively cause the catalytic reduction of 4-NP. Therefore, NaYF4:Yb3+(58%),Tm3+@NaYF4@Au is a type of composite nanomaterial with great development potential and application prospects in the detection and catalysis of 4-NP.
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INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Yuwei Dong,Jialin Ma,Zhou Yu,Xinxin Liu,Zhen Zhao
Herein, we report a reversible and easy assembled fluorometric probe (4-(quinolin-2-ylmethylene)aminoanisole, QMAA ) for the highly selective and sensitive detection of cadmium ion (Cd 2+ ) in DMF solution with PBS buffer (0.01 M, pH = 7.30). The strong fluorescence response of QMAA to Cd 2+ along with a bright blue fluorescence was mainly ascribed to the formation of the complex QMAA–CdCl 2 . The results show that the complexation can inhibit the C N isomerisation and photo–induced electron transfer (PET), and further lead to the occurrence of chelation fluorescence enhancement. The 1:1 stoichiometry of the complex between QMAA and cadmium ion was studied by fluorescence titration, Job’s plot analysis, 1 H NMR, FT–IR, and ESI–MS data, and was further confirmed by the single crystal structure of the complex QMAA–CdCl 2 . Density functional theory (DFT) calculations have verified the mechanism of fluorescence enhancement. In addition, the limit of detection of QMAA for Cd 2+ was as low as 0.1547 µM (at 10 –7 M level), which was lower than the acceptable limit of Cd 2+ level in drinking water defined by World Health Organization. The analog experiments about nature contamination of Cd 2+ in real samples were finished.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Xin Liu,Peng Xu,Zhuoyu Yang,Pengfei Zhu,Lei Wang,Shiqi Xie
Cu 0 coupled with O 2 was used to degrade contaminant due to in-site generation and catalysis of H 2 O 2 , while the low reactivity and active dismutation reaction of Cu + refrained the performance at acidic condition. In this study, the removal rate of 4-acetamidophenol increased from 27 % to 83.4 % with Fe 3+ spiked into the Cu 0 system within 60 min •OH was the primary reactive species in the Fe 3+ /Cu 0 system. In the Fe 3+ /Cu 0 system, Cu 0 was corroded to form Cu + by H + and O 2 , and then Cu + interacted with O 2 generating H 2 O 2 , and meanwhile Fe 3+ was reduced to Fe 2+ by Cu + and Cu 0 ; Consequently, Cu + and Fe 2+ induced H 2 O 2 to produce •OH, but Fe 2+ was easier to catalyze H 2 O 2 than Cu + at acidic pH. Except for fulvic acid , common water matrix including sulfate ion, phosphate ion, chloride ion and nitrate ion had no inhibition effect on the degradation of 4-acetamidophenol in the Fe 3+ /Cu 0 system. over 62 % of 4-acetamidophenol in tap water , Hou-lake water and well water was greatly oxidized by the Fe 3+ /Cu 0 system. Furthermore, the amount of total dissolved copper decreased to 0.895 mg/L by the method of alkali precipitation in the Fe 3+ /Cu 0 system. The study provided a theoretical direction to the Fe 3+ -enhanced Cu 0 system for purifying wastewater.
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