INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Cheng Li,Guangyu Li,Yongtao Zhan,Chenzhao Liu,Yujie Tang,Dong Yan,Jian Li,Lichao Jia
A strategy of in-stack dry reforming of methane (DRM) is proposed by using La 0.6 Sr 0.2 Cr 0.85 Ni 0.15 O 3-δ -loaded Ni foam (LSCrN@NF) as a CH 4 –CO 2 reformer, fuel gas distributor, and anode current collector in a SOFC stack. The prepared LSCrN exists as a single phase in a perovskite structure ; its reduced form contains exsolved Ni nanoparticles embedded on the surface of the LSCrN substrate. Introduced into an NF, the reduced LSCrN@NF demonstrates high DRM activity that increases with the increase of LSCrN amount to an optimum of about 42%. With the LSCrN@NF in-stack DRM, the conversions of CH 4 and CO 2 into CO and H 2 increase. Thus, the electrode polarization resistance, including the cathode and anode , decreases to 0.62, 1.07, and 3.93 Ω cm 2 at 800 °C, 750 °C, and 700 °C, respectively. Consequently, the peak power density (PPD) of the cell using 45% CH 4 -45% CO 2 –10% N 2 as fuel is 1.17, 0.94, and 0.47 W cm −2 , significantly higher than that of the cell without LSCrN@NF in-stack DRM. In addition, the voltage of the cell with LSCrN@NF in-stack DRM is stable on a level between 0.81 and 0.82 V at 400 mA cm −2 and 750 °C for 270 h without detected carbon deposition in the Ni–Y 2 O 3 stabilized ZrO 2 anode. This LSCrN@NF in-stack DRM strategy is also adopted with a large-scale (13 × 13 cm 2 ) single cell, which shows an extrapolated PPD of 428.3 mW cm −2 at 750 °C and is operated for 40 h at 400 mA cm −2 without noticeable performance degradation .
研究领域:
能源材料
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电化学工程
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催化化学
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燃料电池技术
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高温材料科学
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化学反应工程
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清洁能源转化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 37
·15546-15552
·
IF 0
Yitan Li,Lin Wei,Cuncun Wu,Chang Liu,Yanxue Chen,Hong Liu,Jun Jiao,Liangmo Mei
Uniform zinc oxide (ZnO) nanosheet arrays were grown on woven titanium wires using a low temperature hydrothermal method. Photoanodes were prepared by depositing CdS and CdSe quantum dots onto the ZnO nanosheet arrays by a successive ionic layer adsorption and reaction (SILAR) method. Solar cells were assembled using these nanostructured photoanodes and their photovoltaic performance was characterized. The effect of using SILAR cycles for the deposition of quantum dots on the performance of these nanostructured solar cells was investigated systematically. The overall light-to-electricity conversion efficiency of 0.98% was achieved under 100 mW cm−2 illumination for flexible CdS/CdSe co-sensitized solar cells using conventional Pt foils as counter electrodes. To further improve the performance of the flexible solar cells, PbS and Cu2S counter electrodes based on Pb and Cu foils were fabricated. The best conversion efficiencies of flexible CdS/CdSe co-sensitized solar cells using Cu2S and PbS counter electrodes were 3.4% and 2.5%, which demonstrated a significant enhancement in values for short circuit current, open circuit voltage, and fill factor compared to those obtained with the commonly used Pt and Au electrodes.
研究领域:
材料科学
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纳米科技
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能源材料
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光电化学
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半导体器件
✓ 已验证
DOI
Journal of Environmental Chemical Engineering
·
2023
·Vol. 11
·期 3
·110269
·
IF 7.7
Jinghua Li,Haofeng Zhu,Dandi Fang,Xusheng Huang,Chaoqun Zhang,Ying Luo
Although the recycling and reuse of polyurethane foam (PUF) is a promising route to deal with this type of waste commodity polymer, highly efficient and green processing protocols are a great challenge due to their stable crosslink structure. In this study, a strategy of urethane exchange reactions was proposed to transform commercial rigid PUF into PUF sheets. The process was composed of the pulverization of the foam, the pretreatment method and the hot pressing. The effects of the pretreatment method on the structure and properties of the recycled commercial PUF were studied. The results show that the ball milling pretreatment method can effectively pulverize the commercial PUF into powder of 74.5 µm and a specific surface area as high as 2991.0 m 2 /kg, which can promote the urethane exchange reaction in close contact with the catalyst. The recycle method of ball milling pretreatment makes the crosslink density and tensile strength of the PUF sheets reach 2236.8 mol/m 3 and 32.6 MPa, which means an increase of 9.9 times and 3.3 times, respectively, compared to the method of other pretreatment. Moreover, PUF sheets can still maintain 71.5% of the tensile strength after two cycles of recycling, indicating the potential of this recycling method for PUF. This simple and efficient method enhances the sustainability of rigid PUF utilization and shows the enormous potential for value-added recycling of thermosets .
研究领域:
高分子材料科学
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环境科学与工程
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绿色化学
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资源循环利用
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材料再生
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可持续材料技术
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功能高分子
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2014
·
IF 2.694
Guihua Ruan,Meiping Wei,Zhengyi Chen,Rihui Su,Fuyou Du,Yanjie Zheng
A novel large-volume immobilized enzyme reactor (IMER) on small column was prepared with organic–inorganic hybrid silica particles and applied for fast (10 min) and oriented digestion of protein. At first, a thin enzyme support layer was formed in the bottom of the small column by polymerization with α-methacrylic acid and dimethacrylate. After that, amino SiO 2 particles was prepared by the sol–gel method with tetraethoxysilane and 3-aminopropyltriethoxysilane. Subsequently, the amino SiO 2 particles were activated by glutaraldehyde for covalent immobilization of trypsin. Digestive capability of large-volume IMER for proteins was investigated by using bovine serum albumin (BSA), cytochrome c (Cyt- c ) as model proteins. Results showed that although the sequence coverage of the BSA (20%) and Cyt- c (19%) was low, the large-volume IMER could produce peptides with stable specific sequence at 101–105, 156–160, 205–209, 212–218, 229–232, 257–263 and 473–451 of the amino sequence of BSA when digesting 1 mg/mL BSA. Eight of common peptides were observed during each of the ten runs of large-volume IMER. Besides, the IMER could be easily regenerated by reactivating with GA and cross-linking with trypsin after breaking the –C N– bond by 0.01 M HCl. The sequence coverage of BSA from regenerated IMER increased to 25% comparing the non-regenerated IMER (17%). 14 common peptides. accounting for 87.5% of first use of IMER, were produced both with IMER and regenerated IMER. When the IMER was applied for ginkgo albumin digestion, the sequence coverage of two main proteins of ginkgo, ginnacin and legumin, was 56% and 55%, respectively. (Reviewer 2) Above all, the fast and selective digestion property of the large-volume IMER indicated that the regenerative IMER could be tentatively used for the production of potential bioactive peptides and the study of oriented protein digestion.
研究领域:
生物化学
·
分子生物学
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蛋白质组学
·
酶工程
·
生物材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL DAIRY JOURNAL
·
2019
·
IF 2.735
Haixia Wang,Jitao Yang,Min Yang,Wei Ji
Maillard reaction products (MRPs) were prepared by reacting both Yak and Holstein casein with different ratios of glucose to casein from 0:1 to 2.5:1. The results showed that the content of intermediate products and browning intensity of the Yak casein-glucose system increased with increasing concentrations of glucose, but were lower than for the Holstein system at the same ratio. With glycosylation, the reducing power and the 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity of both Yak and Holstein caseins were enhanced. With increased glucose content, the reducing power of Yak MRPs increased at the same concentration. The metal chelating activity of Holstein MRPs decreased or was eliminated in the ratio range of 0.5:1 to 2.0:1 g glucose g −1 casein, while that of Yak MRPs were reduced in general. Improvement of the inhibitory activity for Yak casein was lower than that of Holstein casein after glycosylation by glucose.
研究领域:
食品科学
·
化学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL DE MYCOLOGIE MEDICALE
·
2018
·
IF 1.606
K. Xu,J.L. Wang,M.P. Chu,C. Jia
Objective The aim of this study was to investigate the antibiofilm activity of coumarin against Candida albicans . Methods The efficacy of coumarin against biofilm formation and the mature biofilm of C. albicans was quantified by crystal violet (CV) staining and the 2,3-bis (2-methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino)carbonyl]-2H-tetrazolium hydroxide (XTT) reduction assay. The effect of coumarin on C. albicans adhesion was assessed on polystyrene plates and by using the cell surface hydrophobicity (CSH) assay. The morphological transition of C. albicans was conducted in two types of hyphae-inducing media at 37 °C. The expression of hypha/biofilm-related genes was evaluated using qRT-PCR analysis. A rescue experiment involving addition of exogenous cyclic adenosine monophosphate (cAMP) was performed to investigate the involvement of cAMP in the yeast-to-hyphae transition. A C. albicans -infected Caenorhabditis elegans model was used to test the anti-virulence efficacy of coumarin. Results Treatment with coumarin strongly affected the capacity of C. albicans to form biofilm and significantly impaired the preformed mature biofilm. The addition of coumarin notably inhibited C. albicans adhesion, CSH, and filamentation . The expression of some adhesion- and hypha-related genes, including HWP1 , HYR1 , ECE1 , and ALS3 , was remarkably down-regulated upon exposure to coumarin. Supplementation with cAMP partly rescued the coumarin-induced defects in hyphal development. Finally, coumarin prolonged survival in C. albicans -infected nematodes. Conclusion Coumarin inhibited C. albicans biofilm, which was associated with attenuated adhesion and hyphal growth.
研究领域:
微生物学
·
药理学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Revista Brasileira de Farmacognosia-Brazilian Journal of Pharmacognosy
·
2019
·Vol. 29
·期 1
·46-53
·
IF 1.754
Peng Wei,Han Ping,Yu Luyao,Chen Ying,Ye Bingzhu,Qin Luping,Xin Hailiang,Han Ting
The fruits of Xanthium strumarium L., Asteraceae, have been used for various diseases in Chinese folk medicine, including allergic rhinitis, tympanitis, arthritis, ozena etc. The current study was aimed to investigate the therapeutic effects of caffeoylquinic acids from fruits of X. strumarium on allergic rhinitis in animals. The toxicity test indicated that the caffeoylquinic acids have no obvious toxicity. By using HPLC assays combined with reference standards, ten caffeoylquinic acids were identified as the predominant constituents. Anti-allergic activities of the caffeoylquinic acids were evaluated using passive cutaneous anaphylaxis test and Schultz-Dale test; dimethylbenzene induced ear edema test was performed to evaluate its anti-inflammatory effect. Then, the allergic rhinitis model in rats was established to evaluate the therapeutic effects of the caffeoylquinic acids against allergic rhinitis with the following indexes: allergic rhinitis symptom scores, serum levels of pro-inflammatory cytokines, histopathological examination, and histamine release. Our study revealed that the caffeoylquinic acids showed obvious anti-allergic and anti-inflammatory properties, and its treatments were beneficial for ameliorating the nasal symptoms, decreasing pro-inflammatory cytokines, and inhibiting the releases of histamine. Collectively, the caffeoylquinic acids might be utilized as effective and safe disease therapeutic agents for allergic rhinitis.
研究领域:
药理学
·
免疫学
·
过敏
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）