JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2021
·Vol. 36
·期 2
·289-296
·
IF 0.957
Zheng Hang,Li Jin,Song Weizheng,He Guangyao,Wang Yifeng,Chen Yanjun
A thermal-responsive photonic crystal material was fabricated by forming an inverse opal nanocomposite hydrogel of poly(N-isopropylacrylamide) (IONH PNIPAm ) within the interstitial space of a polystyrene photonic crystal template. In IONH PNIPAm , PNIPAm were physically cross-linked with two kinds of nanoparticles (carbon dots and laponite clays). The integration of carbon dots and laponite clays for physical crosslinking endowed IONH PNIPAm sufficient strength and self-healing property. IONH PNIPAm films can be completely peeled from the substrates to be utilized as an independent photonic crystal material. The structural color and optical diffraction of the IONH PNIPAm exhibits a rapid reversible change in response to external thermal stimuli due to its physical cross-linking feature. Moreover, the IONH PNIPAm shows clear fluorescence due to the introduction of carbon dots, which enables a convenient way for chemical detection (such as the detection of silver ions). This stimuli-responsive photonic crystal materials based on physically cross-linked inverse opal nanocomposite hydrogels with fast response and good mechanical stability are promising for applications in the fields of smart optical detectors, thermal-responsive sensors and chemical detectors.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 11
·14932-14943
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IF 2.478
Deng Huawei,Liu Jun,Zhang Hang,Li Chaorui,Liu Zhen,Chen Dihu
Multimodal imaging has attracted tremendous attention in biotechnology and nanomedicine applications. Monoclinic Gd 2 O 3 :Dy 3+ nanoparticles (NPs) with dual-color fluorescence imaging (FI) and magnetic resonance imaging (MRI) have been successfully synthesized by employing laser ablation in liquid (LAL) technique. The synthesized nanoparticles can be used as yellow fluorescence nanoprobe as well as blue ones due to their sharp and strong yellow and blue emissions. Magnetic resonance imaging (MRI) measurement shows that the longitudinal relaxivity (r 1 ) of the Gd 2 O 3 :1%Dy 3+ NPs is 4.5 times higher than that of the commercial Gd-DTPA. The experiment of in vitro cell fluorescence imaging and magnetic resonance imaging of female Balb/c mouse indicates that the Gd 2 O 3 :Dy 3+ NPs synthesized by LAL technique are promising candidates of dual-color FI nanoprobe and MRI contrast agent in further clinical applications.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 23
·13083-13095
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IF 4.22
Yang Yi,Wang Zhida,Mai Yilang,Guo Changqing,Shi Yan,Tan Hongyi,Lu Zhuoxin,Shen Lisha,Yan Changfeng
In this work, PtCo nanoparticles (NPs) on hierarchically ordered mesoporous carbon (PtCo/OMC) are synthesized for polymer electrolyte membrane fuel cells (PEMFCs) aiming to improve the activity and durability of the Pt-based catalyst towards oxygen reduction reaction (ORR). Specifically, the OMC is prepared through a solvent evaporation-induced self-assembly (EISA) method by using a triblock copolymer PEO-PPO-PEO as the structure agent, followed by annealing in the nitrogen atmosphere to decompose the structure agent and to carbonize the carbon precursor. PtCo nanoparticles (NPs) are fabricated with an average diameter of 3.3 nm by H 2 reduction and galvanic replacement in an acid solution, and then are uniformly dispersed onto the OMC via impregnation. The typical mesoporous structure of the OMC enhances the uniformly distribution and thermal stability of the small-sized PtCo NPs. The activity and the durability of the as-prepared PtCo/OMC catalyst are investigated by cyclic voltammetry (CV) and single-cell test. In the electrochemical tests, PtCo/OMC exhibits a high ECSA value of 88.56 m 2 g −1 , and a ECSA retention of 77.5% after 5000 CV cycles. The results show that the PtCo/OMC catalyst is more active and more stable than the commercial-carbon-supported PtCo catalyst (PtCo/XC-72). Graphical abstract PtCo nanoparticles (NPs) on hierarchically ordered mesoporous carbon (PtCo/OMC) are synthesized aiming to improve the activity and stability of the Pt-based catalyst for the oxygen reduction reaction (ORR). Due to the natural mesoporous and graphite-carbon nanostructure of the OMC, the as-prepared PtCo/OMC catalyst is more active and more stable than the PtCo NPs on the commercial Vulcan @ XC-72 support (PtCo/XC-72), showing great potential in proton exchange membrane fuel cells (PEMFCs).
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高影响因子
Journal of Analysis and Testing
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2021
·Vol. 6
·期 3
·318-326
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IF 0
Chen Ya-Shun,Feng Yu-Qi
20-Hydroxyecdysone (20E) derived from plants has a wide range of physiological and pharmacological effects on animals and humans, and rapid and sensitive methods for screening of the endogenous 20E in plants are thus required. Herein, a matrix-assisted laser desorption/ionization time-of-flight tandem mass spectrometry (MALDI-TOF/TOF MS) method is described for rapid and sensitive determination of endogenous 20E in plants. It is based on the use of the (3-(acridin-9-ylamino) phenyl) boronic acid (AYPBA) as the mass tag to assist the MS and tandem MS (MS n ) analysis of 20E on MALDI-TOF/TOF MS. Good linearity was obtained with a determination coefficient ( R 2 ) larger than 0.99 in the range of 0.025–2.5 μΜ. The limit of detection (LOD) was 2.4 fmol. Acceptable precision and accuracy were gained by intra- and inter-day analysis with relative standard deviations less than 19.5% and relative recoveries ranging from 85.7 to 105.2%. In addition, the AYPBA labeled 20E produced abundant characteristic fragment ions under the high energy collision-induced dissociation, which facilitated the identification of 20E by MS 2 analysis on MALDI-TOF/TOF MS. Using the method, we enabled the identification and quantification of endogenous 20E in four herbs including Cyanotis arachoidea , Achyranthes bidentata , Spinacia oleracea and Chenopodium quinoa willd., demonstrating the feasibility of the proposed method for screening of the endogenous 20E in plants.
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Food and Bioprocess Technology
·
2021
·Vol. 14
·期 8
·1600-1610
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IF 4.465
Wu Xia,Li Xinying,Yang Like,Yuan Lun,Xu Zhilang,Xu Jinfang,Ge Liming,Mu Changdao,Li Defu
Solid edible fat obtained by hydrogenation of vegetable oils is widely used in food market. However, the produced partially hydrogenated oils usually contain trans-fatty acids, which are harmful to health. It is meaningful to develop effective ways to directly structure edible liquid oil into gel-like state with good stability. Herein, we presented Pickering emulsions cooperatively stabilized by gelatin nanoparticles (GNPs) and dialdehyde starch nanoparticles (DASNPs) to structure liquid vegetable oils into gel state. It is interesting that Schiff’s base reactions happened between GNPs and DASNPs on the surface of Pickering emulsion droplets as well as the interface among droplets, which effectively improved the stability of Pickering emulsions. The enhanced stability of Pickering emulsions contributed to the good solidification capacity to liquid oils. As a result, the emulsions could keep structure well after 6 months of storage. Moreover, the dense interfacial layer of Pickering emulsion droplets could protect β-carotene from being diffused out of the internal phase, indicating the potential of Pickering emulsions as container for encapsulating nutrients. In sum, the developed Pickering emulsion is a good strategy to structure liquid oils.
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高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 11
·7021-7031
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IF 5.044
Zhu Longxiang,Feng Zhaoxue,Wang Dafeng,Wu Jiamin,Qiu Jianhui,Zhu Ping
Lignocellulose is an important biomass resource. Its main components cellulose, hemicellulose, and lignin can be used as important energy and chemical raw materials. The special 3-D stereoscopic structure of lignocellulose makes it difficult to separate its components efficiently, limiting large-scale industrial applications. In this work, a novel one-pot and low-temperature phase transition (LTPT) method with no oxidant was applied to efficiently isolate rice straw cellulose microfibers (CMF) from rice straw (RS), with the cellulose content of the CMF reaching 85.4%. The LTPT method can also change the crystal structure of cellulose in RS from cellulose I to cellulose II. Furthermore, experimental results show that CMF can be isolated from RS at a low concentration (3 wt%) of NaOH solution. Graphic abstract In this work, we used the one-pot and low-temperature phase transition method to prepare rice straw cellulose microfibers (CMF) in NaOH solution. The diameter of CMF is about 4.32 μm, and its cellulose content can reach 85%.
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高影响因子
Advanced Composites and Hybrid Materials
·
2021
·Vol. 4
·期 4
·1270-1280
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IF 5.693
Xu Manman,Huang Yunqing,Chen Ruwei,Huang Quanbo,Yang Yang,Zhong Linxin,Ren Junli,Wang Xiaohui
There is an urgent need to find green and efficient technologies for the sustainable reuse of the Chinese medicine residues due to their abundant annual production companied with serious environment problems. Herein, we synthesized a three-dimensional hierarchically porous carbon from Ganoderma lucidum residues for the application of supercapacitor electrodes via a molten alkali treatment activation/carbonization process. The resulting porous carbon samples had large surface areas (1347.7 m 2 g −1 ), a hierarchical pore structure, and excellent capacitance and were obtained using much less corrosive activator compared with other studies. When used for supercapacitor, the Ganoderma lucidum residues–derived porous carbon electrode presented outstanding electrochemical performance, with specific capacitances of up to 365.6 F g −1 at 1 A g −1 , and cycling stability of up to 99% after 10,000 cycles at a current density of 2 A g −1 . This work broadens the application of Chinese medicine residues in the field of energy storage and provides a new avenue for high value conversion of waste resources. Graphical abstract
Using Chinese Medicine Residues as precursor, a convenient activation/carbonization process is proposed to synthesize porous carbon as supercapacitor electrode materials.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2021
·Vol. 36
·期 9
·1866-1882
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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
Journal of Inorganic and Organometallic Polymers and Materials
·
2021
·Vol. 31
·期 11
·4260-4271
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IF 3.543
Zhang Xuan,Wang Tongfei,Li Songjun,Shen Xiaojuan
Abstract In this article, a novel silicon-based electrode was designed with the facile solution methods. With the modification of highly conductive PEDOT:PSS layer on the SiNWs by the spin-coated method (SiNWs-PSS), three-dimensional (3D) porous network polyaniline nanofibers (PANI) film was uniformly electrodeposited on the silicon surface (SiNWs-PSS@PANI). The sheet resistances of the PEDOT:PSS layer with different surfactants as well as the deposition time of the PANI were investigated. After optimization, the fabricated SiNWs-PSS@PANI electrode displayed high capacitance about 301.71 mF cm −2 at the current density of 1 mA cm −2 , which enhanced ~ 29 fold comparing to 10.18 mF cm −2 of electrode without the PEDOT:PSS layer between the SiNWs and PANI (SiNWs@PANI), outperforming most values of the reported silicon-based electrodes. The electrode designed in this paper provides a new idea to fabricate high-performance of silicon-based micro-supercapacitors with the simple and low-temperature method. Graphic Abstract
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高影响因子
POLYMER BULLETIN
·
2021
·Vol. 79
·期 6
·4219-4231
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IF 2.87
Zhang Na,Wu Yansong,Li Yuying,Chen Liduo,Zhang Mingshui,Wang Jun
A novel star iminopyridyl ligand was synthesized in modest yield with 1.0 G star macromolecule and pyridine-2-carboxaldehyde as the raw materials. Reactions of the star iminopyridyl ligand with Fe(II), Co(II) and Ni(II) salts afforded metal complexes (Cat-Fe, Cat-Co and Cat-Ni) in good yields. The compounds were characterized by FT-IR, 1 H NMR, 13 C NMR, UV–Vis, ESI–MS and ICP-MS. In the presence of methylalumoxane (MAO), the iron, cobalt and nickel complexes have demonstrated higher ethylene oligomerization activity (up to 4.28 × 10 5 g/(mol Co h)), affording C 4 as the major product as well as C 6 , C 8 and C 10-18 oligomers. The catalytic activity was quite sensitive to the kind of species. The nature of solvent and co-catalyst significantly affected both the catalytic activity and product distribution. Moreover, the effect of oligomerization parameters (reaction temperature, [Al]/[Co] molar ratio, ethylene pressure) on the catalytic activity and the product distribution was investigated.
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高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 9
·5923-5935
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IF 5.044
Yang Yingying,Zhang Shiyu,Huang Wei,Guo Zengpei,Huang Jingjing,Yang Hongjun,Ye Dezhan,Xu Weilin,Gu Shaojin
In this study, a multifunctional cotton fabric with durable superhydrophobic, antibacterial, and UV resistance properties was prepared by in situ growth of zeolitic imidazolate framework-67 on cotton fabric surface, followed by polydimethylsiloxane modification. The as-obtained multifunctional cotton fabric not only showed superhydrophobicity with a water contact angle of 153.0° ± 2.7°, but also displayed good UV resistance with a UV protection factor value of 32. Furthermore, the as-obtained cotton fabric exhibited excellent antibacterial activities against S. aureus and E. coli . Besides, the as-prepared multifunctional cotton fabric had good resistance to mechanical abrasion. Consequently, this multifunctional fabric could be potentially applied to antibacterial and anti-ultraviolet field. Graphic abstract
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高影响因子
Cancer Cell International
·
2021
·Vol. 21
·期 1
·1-12
·
IF 5.722
Jiang Dongxiao,Ding Shufei,Mao Zhujun,You Liyan,Ruan Yeping
Background Colon cancer is a malignant gastrointestinal tumour with high incidence, mortality and metastasis rates worldwide. Aloe-emodin is a monomer compound derived from hydroxyanthraquinone. Aloe-emodin produces a wide range of antitumour effects and is produced by rhubarb, aloe and other herbs. However, the mechanism by which aloe-emodin influences colon cancer is still unclear. We hope these findings will lead to the development of a new therapeutic strategy for the treatment of colon cancer in the clinic.Methods We identified the overlapping targets of aloe-emodin and colon cancer and performed protein–protein interaction (PPI), Gene Ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses. In addition, we selected apoptosis pathways for experimental verification with cell viability, cell proliferation, caspase-3 activity, DAPI staining, cell cycle and western blotting analyses to evaluate the apoptotic effect of aloe-emodin on colon cancer cells.Results The MTT assay and cell colony formation assay showed that aloe-emodin inhibited cell proliferation. DAPI staining confirmed that aloe-emodin induced apoptosis. Aloe-emodin upregulated the protein level of Bax and decreased the expression of Bcl-2, which activates caspase-3 and caspase-9. Furthermore, the protein expression level of cytochrome C increased in a time-dependent manner in the cytoplasm but decreased in a time-dependent manner in the mitochondria.Conclusion These results indicate that aloe-emodin may induce the apoptosis of human colon cancer cells through mitochondria-related pathways.
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PubMed
高影响因子
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