Nature Communications
·
2021
·Vol. 12
·期 1
·1-11
·
IF 14.919
Lv Houfu,Lin Le,Zhang Xiaomin,Li Rongtan,Song Yuefeng,Matsumoto Hiroaki,Ta Na,Zeng Chaobin,Fu Qiang,Wang Guoxiong,Bao Xinhe
Metal nanoparticles anchored on perovskite through in situ exsolution under reducing atmosphere provide catalytically active metal/oxide interfaces for CO 2 electrolysis in solid oxide electrolysis cell. However, there are critical challenges to obtain abundant metal/oxide interfaces due to the sluggish diffusion process of dopant cations inside the bulk perovskite. Herein, we propose a strategy to promote exsolution of RuFe alloy nanoparticles on Sr 2 Fe 1.4 Ru 0.1 Mo 0.5 O 6− δ perovskite by enriching the active Ru underneath the perovskite surface via repeated redox manipulations. In situ scanning transmission electron microscopy demonstrates the dynamic structure evolution of Sr 2 Fe 1.4 Ru 0.1 Mo 0.5 O 6− δ perovskite under reducing and oxidizing atmosphere, as well as the facilitated CO 2 adsorption at RuFe@Sr 2 Fe 1.4 Ru 0.1 Mo 0.5 O 6− δ interfaces. Solid oxide electrolysis cell with RuFe@Sr 2 Fe 1.4 Ru 0.1 Mo 0.5 O 6− δ interfaces shows over 74.6% enhancement in current density of CO 2 electrolysis compared to that with Sr 2 Fe 1.4 Ru 0.1 Mo 0.5 O 6− δ counterpart as well as impressive stability for 1000 h at 1.2 V and 800 °C.
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PubMed
高影响因子
MACROMOLECULAR RESEARCH
·
2021
·Vol. 29
·期 9
·625-635
·
IF 2.227
Li Li,Wang Huan,Hua Fenglin,Wang Mingming,Zhang Yuanshuo,Xi Hui,Yang Jing,Yang Zhiwang,Lei Ziqiang
An effective ternary organic-inorganic composite flame retardant of reduced graphene oxide-poly-dopamine@graphitic carbon nitride@10-(2,5-dihydroxyphenyl)-10- H -9-oxa-10-phosphaphenanthrene-10-oxide (RGO-PDA@g-C 3 N 4 @ODOPB) was successfully fabricated by co-precipitation method. Its property concerning the intrinsic flame retardancy and the mechanical performance was well studied when it was used as co-additives in combination with ammonium polyphosphate (APP) in epoxy resin (EP) samples. The surface morphology and the structure of RGO-PDA@g-C 3 N 4 @ODOPB were characterized by SEM, and the molecular structure and compositions were investigated by FT-IR, powder XRD and 1 H NMR. TGA, limit oxygen index (LOI), vertical burning test (UL-94), cone calorimeter test, and SEM were also used to investigate the thermal properties and flame retardancy of materials. As expected, the flame retardancy of EP was significantly heightened after adding of RGO-PDA@g-C 3 N 4 @ODOPB composites. It showed that with the 20% adding of RGO-PDA@g-C 3 N 4 @ODOPB/APP into EP led to the decreasing of the peak heat release rate and the total heat release at 78% and 62.5%, respectively. Meanwhile, the LOI value of the EP composites was as high as 29% and reached UL-94 V-0 rate. It was deemed that the excellent flame retardancy was attributed to the forming of compact and stable carbon layer, which was being catalytic carbonization by APP existed in the RGO-PDA@g-C 3 N 4 @ODOPB/APP composites. At the same time, the non-combustible gas released from thermal cracking of g-C 3 N 4 during the combustion also benefited the flame retardant performance of EP.
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JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 29
·期 1
·169-179
·
IF 2.496
Pang Yue-Hong,Yang Nian-Ci,Qiao Jin-Yu,Shen Xiao-Fang,Huang Yu-Ying
Benzo[a]pyrene (BaP), one of the polycyclic aromatic hydrocarbons with potential carcinogenic, mutagenic and teratogenic toxicity, have been widely concerned. Herein, we report a simple and rapid co-precipitation method for the synthesis of magnetic covalent organic framework (Fe 3 O 4 /COF-DQTp) adsorbent for BaP removal. The magnetized COF-DQTp was characterized by fourier transform infrared, X-ray diffractometer, Brunauer–Emmett–Teller, vibrating sample magnetometer, transmission electron microscopy, high angle annular dark field scanning transmission electron microscopy image and energy-dispersive X-ray spectroscopy elemental mapping. Under the optimized adsorption conditions, the adsorption efficiency was as high as 99% and the maximum adsorption capacity is 19 mg/g in 10 min. The adsorption kinetics shows that adsorption of BaP onto Fe 3 O 4 /COF-DQTp follow pseudo-second order kinetic model. Moreover, the prepared Fe 3 O 4 /COF-DQTp has good reusability and is a potential material for the adsorption of BaP.
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JOURNAL OF MATERIALS RESEARCH
·
2021
·Vol. 36
·期 9
·1866-1882
·
IF 3.089
Wu Jin,Liu Yajing,Zhang Hao,Wu Yizhen,Chu Zhuangzhuang,Wu Qirong,Lu Mengmeng,Tang Chunbo
Abstract In this study, we presented that human bone mesenchymal stem cells (hBMSCs) showed superior adhesion and proliferation behaviors on polished silicon nitride (Si 3 N 4 ). Also, compared to Ti and ZrO 2 , Si 3 N 4 enhanced the osteogenic activities of hBMSCs indicated by increases in alizarin red S (ARS) staining, Ca 2+ concentration, and mRNA expression of RUNX2, OPN, OCN, and COL1. Furthermore, colony formation assays demonstrated significantly better antibacterial activities against oral pathogens Porphyromonas gingivalis (Pg), Staphylococcus aureus (SA), and Escherichia coli ( E. coli ) on Si 3 N 4 surface than Ti and ZrO 2 . Live/dead bacterial staining showed a large amount of dead Pg on Si 3 N 4 surfaces. The fact that Si 3 N 4 demonstrated advantages in osteogenic and antibacterial activities over Ti and ZrO 2 might be a reason for its potential use as non-metallic dental implant materials. However, more detailed studies with resolution techniques and preclinical studies are needed to confirm the Si 3 N 4 ’s osteogenic and antibacterial properties. Trial registration number PJ2019-066-001; date of registration: Jun 2019. Graphic abstract
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高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2021
·Vol. 38
·期 5
·899-905
·
IF 3.309
Chen Binglin,Li Jiachen,Feng Yunchao,Le Kai,Zai Yuxia,Tang Xing,Sun Yong,Zeng Xianhai,Lin Lu
Algal biomass was converted into 5-aminolevulinic acid (5-ALA) in five chemical steps: conversion to 5-(chloromethyl)furfural (5-CMF), ammoniation, ring-opening (photo-oxidation), reduction, and hydrolyzation. Among them, we mainly focused on the 5-CMF production and the following ammoniation. To our knowledge, the mixed solvent catalytic system of deep eutectic solvent (DES) and low concentration hydrochloric acid is the first reported for the synthesis of 5-CMF from algal biomass, providing a 24.6% 5-CMF yield at 120 °C for 5 h. Potassium phthalimide (KPI) was employed as an ammoniation reagent with superb selectivity and activity instead of conventional sodium azide (NaN 3 ). Optimizing the experimental design, a 23.7% 5-ALA yield along with high purity (>96%) was achieved from 5-CMF, and the total 5-ALA yield was 5.8% from algal biomass. This work provides a green and mild pathway for 5-ALA production from algal biomass.
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高影响因子
Food Analytical Methods
·
2021
·Vol. 14
·期 10
·2076-2087
·
IF 3.366
Wang Dan,Yang Yi,Xu Zhigang,Liu Yujian,Liu Zhimin,Lin Tao,Chen Xinglian,Liu Hongcheng
An effective method based on molecularly imprinted polymer solid-phase microextraction (MIP-SPME) to assess the risk of kojic acid (KA) in food was proposed in this work. KA is widely used in the food industry but may have potential hazards, such as carcinogenicity. Herein, theoretical simulation and UV–vis spectrum were applied to investigate the synthesis procedure of MIP. The molecular simulation was in marked contrast with the traditional complicated preparation optimization of MIP-SPME coating. The prepared MIP-SPME fiber coating was a mesoporous material with high porosity, the leading cause of better mass transfer of target analytes in complex media. Furthermore, a novel theoretical simulation method of annealing operation was used to obtain the hydrogen bond interaction force for every possible or even dominate action site in the template-monomer system. In addition, compared to the existing approaches of KA determination, this method exhibited ultralow limits of quantification (0.20 and 0.72 μg L −1 ); it was successfully used for the selective trace detection of KA in wheat flour and starch. The proposed MIP-SPME approach, as a strategy for the risk assessment of KA, is proven to have great stability, high sensitivity and reproducibility.
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Drug Delivery and Translational Research
·
2021
·Vol. 12
·期 3
·603-614
·
IF 4.617
Shi Feng,Chen Lin,Wang Yaping,Liu Jing,Adu-Frimpong Michael,Ji Hao,Toreniyazov Elmurat,Wang Qilong,Yu Jiangnan,Xu Ximing
The objective of this study was to fabricate a novel drug delivery system using Soluplus® (polyvinyl caprolactam–polyvinyl acetate–polyethylene glycol graft copolymer) and glycyrrhizic acid to improve solubility, bioavailability, and anti-hyperuricemic activity of aloe emodin (AE). The AE-loaded mixed micelles (AE-M) were prepared by thin-film hydration method. The optimal AE-M contained small-sized (30.13 ± 1.34 nm) particles with high encapsulation efficiency (m/m, %) of 90.3 ± 1.08%. The release rate of AE increased in the micellar formulation than that of free AE in the four media (DDW, pH 7.0; phosphate buffer solution, pH 7.4; phosphate buffer solution, pH 6.8; and hydrochloric acid aqueous solution, pH 1.2). In comparison to free AE, the pharmacokinetic study of AE-M showed that its relative oral bioavailability increased by 3.09 times, indicating that mixed micelles may promote gastrointestinal absorption. More importantly, AE-M effectively reduced uric acid level by inhibiting xanthine oxidase (XOD) activity in model rats. The degree of ankle swelling, serum levels of interleukin (IL)-1, and IL-6-related inflammatory factors levels all decreased in the gouty arthritis model established via monosodium urate (MSU) crystals. Taken together, the AE-M demonstrated the potential to improve the bioavailability, anti-hyperuricemic activity, and anti-inflammation of AE. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 18
·10979-10989
·
IF 4.22
Wang Jing,Wang Tao,Hu Yimeng,Zhang Xiaonan,Ma Yanyan,Lv Hongmin,Xu Shanshan,Wang Yinglong,Jiang Zike
In this work, novel β -cyclodextrin-enhanced Eu 3+ luminescence aggregates (CELAs) with bright red fluorescence of Eu 3+ are prepared. These CELAs exhibit the quick response and highly selective sensitivity at the concentration of 50 µM Fe 3+ . A series of ligands (such as TTA, phen, β -cyclodextrin) sensitizes the luminescence of Eu 3+ (the “antenna effect”), and metal ions–ligands interactions can differentially alter the antenna effect of ligands toward Eu 3+ . Addition of EDTA to chelate Fe 3+ restores the fluorescence, indicating that the fluorescence quenching in the presence of Fe 3+ is reversible. This research provides that CELAs integrate these merits of superior lanthanide fluorescence and the amphiphilia property of β -cyclodextrin ( β -CD). It is a unique system with enhancement Eu 3+ luminescence in ethanol–water system and will be applied for aqueous solution detection sensor with high selectivity and reversibility for Fe 3+ . On the other hand, the on-off fluorescence property of the CELAs is convenient for environmental detection system.
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高影响因子
CATALYSIS SURVEYS FROM ASIA
·
2021
·Vol. 25
·期 2
·148-158
·
IF 3.106
Bao Er-Peng,Dong Ruichen,Zhang Shuoqing,Li Huan,Zhang Weiguo,Zou Jijun,Xu Qiang
The photocatalysis of graphtic carbon nitride (g-C 3 N 4 ) material has been widely used for the photocatalytic degradation of organic pollutants. However, g-C 3 N 4 still has some drawbacks, such as the high recombination of photo-induced electron–hole pairs and weak absorption of light irradiation. To further improve the photodegradation performance of g-C 3 N 4 , a novel composite photocatalyst (CoO/ PT-C 3 N 4 ) has been prepared by using a one-pot calcination method, in which cobalt oxide (CoO) as a cocatalyst are introduced on the rectangular hollow substrate of g-C 3 N 4 (PT-C 3 N 4 ), The CoO/PT-C 3 N 4 composite photocatalyst delivers an excellent photodegradation performance for diesel oil under a simulated sunlight. It exhibits a high degradation efficiency of 95.92% after light irradiation for 2 h, which is much higher than that of pristine PT-C 3 N 4 . Free radical capture experiments manifest that the free radical of ·O 2− plays a major role for the photodegradation and main active radicals abide by the sequence: ·O 2− > ·OH > h + . Moreover, the CoO/PT-C 3 N 4 composite photocatalyst delivers an excellent cyclic stability, which only degrades 8.71% photodegradation efficiency after 10 cycles. The improvement of CoO/PT-C 3 N 4 composite photocatalyst is ascribed to the formation of a heterojunction between CoO and PT-C 3 N 4 , which promotes the separation of photo-induced carriers. This work paves a new way for the exploration of photocatalyst for the organic pollutant degradation.
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IONICS
·
2021
·Vol. 27
·期 5
·2127-2138
·
IF 2.817
Dai Jicui,Ding Tianlin,Dong Yichao,Teng Xiangguo
Nafion is currently the most stable ion exchange membrane for vanadium redox flow battery (VRB). In order to decrease the high vanadium permeability of Nafion while still keeping its high ionic conductivity and stability, in this study, solution atom transfer radical polymerization (ATRP) method is used with Nafion as initiator to prepare amphoteric Nafion membrane with tunable cationic and anionic ratios. Polymers of [2-(methacryloyloxy)ethyl] trimethylammonium chloride (METAC) and sodium 4-styrenesulfonate (NaSS) are chosen as cationic and anionic monomers, respectively. FT-IR (Fourier transform infrared) and 1 H NMR (nuclear magnetic resonance) tests prove that the METAC and NaSS have been successfully bonded on the Nafion molecules. The solution-casted amphoteric Nafion membrane M-1:1 has shown the highest ion selectivity among all the grafted Nafion membranes. The VRB with M-1:1 membrane has shown the highest average energy efficiency of 83.9% at current density of 40–80 mA cm −2 , which is 4.2% higher than that of Nafion 212 (79.7%). One hundred cycles dynamic charge-discharge test proves that the M-1:1 membrane possesses enough stability and good discharge capacity retention ability. On-line self-discharge test further proves that the M-1:1 membrane has lower vanadium ions permeation than that of Nafion 212 membrane. All the results prove that ATRP is an effective method for preparation of novel amphoteric materials for VRB application.
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高影响因子
IONICS
·
2021
·Vol. 27
·期 5
·2037-2043
·
IF 2.817
Kang Shusen,Yang Zelin,Yang Chengxiang,Zhao Shan,Wu Ningning,Liu Fuliang,Chen Xiaotao,Shi Bin
A novel polymer film is developed by trapping tribasic gel polymer electrolyte (GPE), which blended the polyethylene glycol (PEO), polystyrene (PS), and poly(methyl methacrylate) (PMMA). The properties of the PEO-PS-PMMA polymer film and PEO-PS-PMMA GPE were investigated. The ionic conductivity of the PEO-PS-PMMA GPE is 0.12 mS/cm at 25 °C. Li + transference number of PEO-PS-PMMA GPE is 0.2. Besides, PEO-PS-PMMA GPE shows high electrochemical stability and excellent interface stability to Li metal electrode. Li/PEO-PS-PMMA/LiFePO 4 cell achieved an initial specific discharge capacity of 97 mAh/g and good cycle performance at the current density of 0.1 C. This GPE is promising to be applied to rechargeable Li batteries with high safety and long cycle life.
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高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 6
·3617-3630
·
IF 5.044
Qin Chengrong,Wang Wei,Li Wei,Zhang Song,Li Zerong
Superhydrophobic surfaces have attracted great attention due to their interesting properties. The ever-increasing environmental concern accelerated the development of bio-based superhydrophobic coating materials. As a high-yield agricultural waste, bagasse is cheap, ready available, renewable and biodegradable. It would be an ideal raw material for the preparation of bio-based superhydrophobic coatings to further improve its application value. Although the hydrophobization of bagasse have been reported, the according works mainly focus on the reaction mechanism and/or their oil-absorption properties. As far as we know, the design of bagasse-based superhydrophobic coatings has been uncovered. Herein, mechanically pretreated bagasse was esterified with stearoyl chloride. Spray-coating the suspension of as-synthesized bagasse esters onto various substrates (glass slide, aluminum flake and filter paper), superhydrophobic surfaces were generated. SEM images in combination with the high-resolution C1s XPS deconvolution spectra implied that nano-structured bagasse esters were deposited on the synthesized micro-scaled esters, which was necessary for their superhydrophobicity. The as-prepared superhydrophobic surfaces exhibited good anti-fouling, oil absorption performance and high time/temperature/pH stability. This research would provide a novel perspective for the design of other bio-based superhydrophobic coatings. Graphic abstract
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高影响因子
危险品化学品经营许可证（带存储）