JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Ping-Ping Sun,Yu-Hang Zhang,Hongwei Shi,Fa-Nian Shi
A new 3-D Co-MOF with the molecular formula of C 10 H 8 Co 3 N 4 O 12 was prepared by hydrothermal method . As the anode for lithium ion battery , the electrode modified with 20% copper powder (Co-MOF-20) shows the specific capacity of 1138.5 mAh g −1 at 100 mA g −1 . Even under the high current test of 500 mA g −1 , Co-MOF-20 also shown excellent performance (349.6 mAh g −1 ) after 300 cycles. The advantages of Co-MOF-20 electrode are not only due to the introduction of copper powder conductive agent, but also the existence of three-dimensional structure which can provide ion transport channels.
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高影响因子
CARBON
·
2021
·
IF 9.594
Khaled Tawfik Alali,Jing yu,Deema Moharram,Qi Liu,Rongrong Chen,Jiahui Zhu,Rumin Li,Peili Liu,Jingyuan Liu,Jun Wang
Hierarchical 3-dimensional (3D) carbon nanostructures have potential applicability in several electrochemical energy applications own to their sizeable effective surface, specific energy density , cycling stability and flexibility. Herein, combining electrospinning with in situ chemical vapor deposition (CVD) technologies as an efficient and secure procedure is applied for constructing 3D carbon nanostructure-based on carbon fibers (CFs) and electrospun carbon nanofibers (ECNFs). Affect the catalysis type, immersion solution, carbon sources and treat temperature are experimentally demonstrated. Cactus-like 3D carbon nanomaterials are constructed via growth forest-like carbon nanofibers (CNFs) directly on both CNFs and CFs at 900 °C using Ni as a catalyst, cellulose acetate (CA) as carbon source and ethanol-urea as an immersions solution. The Ni/CNFs/ECNFs mat exhibits a large surface area of 342.3 m 2 g −1 , while just 19.3 m 2 g −1 is recorded to Ni/CNFs/CFs. Based on the nano-nonwoven structure and forest-like grown CNFs nanostructure, Ni/CNFs/ECNFs exhibit a favorable hydrogen evolution reaction (HER) performance in an alkaline medium with a low overpotential of 88 mV to deliver 10 mV cm −2 current density and Tafel slope of 170 mV dec −1 . This work proves the synthesis parameters of 3D hierarchical carbon nanostructures and their enticing to apply as an advanced substrate for electrochemical applications.
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Journal of Analysis and Testing
·
2021
·Vol. 5
·期 4
·387-395
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IF 0
Zhou Yufeng,Duan Liguang,Huang Yixin,Liu Yaqi,Wang Lijuan,Qiao Xiaoqiang
The amino acids post-modified ionic liquids-based hybrid monolithic columns were successfully developed. For the first step, using 1-vinyl-3-dodecylimidazole bromide (VDI·Br) and polyhedral oligomeric silsesquioxane methacryl substituted (POSS-MA) as monomer and crosslinking agent, the monolithic POSS-VDI matrix material was polymerized in 100 μm capillary. The prepared POSS-VDI column is of ion-exchange/reverse-phase mixed-mode retention characteristics. The column efficiency reached 137,000 N/m for thioureas. The POSS-VDI column has also been successfully applied to recognize and analyze the effective components of Traditional Chinese Medicines Fangji and the Root of Kudzu Vine. Furthermore, based on its good chromatographic performances, in the second step, amino acids l -Proline ( l -Pro), Glycine (Gly) or DL-Phenylalanine (DL-Phe) were further exploited as the anion exchangers to post-modify the POSS-VDI column. The new POSS-VDI-Pro, POSS-VDI-Gly and POSS-VDI-Phe columns exhibited different separation selectivity for the complex egg white protein sample. The present work provides a good route to fabricate versatile amino acids and ionic liquids modified monolithic columns with good separation selectivity.
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Frontiers in Chemistry
·
2021
·
IF 5.221
Yang Xiaohui,Lu Wanlong,Cao Jingning,Zhai Chenyang,Li Weili,Zha Fangwen,Lu Guanghao,Tian Hongkun,Yu Demei,Bu Laju
The preparation of micron- to nanometer-sized functional materials with well-defined shapes and packing is a key process to their applications. There are many ways to control the crystal growth of organic semiconductors. Adding polymer additives has been proven a robust strategy to optimize semiconductor crystal structure and the corresponding optoelectronic properties. We have found that poly(3-hexylthiophene) (P3HT) can effectively regulate the crystallization behavior of N,N′-dioctyl perylene diimide (C8PDI). In this study, we combined P3HT and polyethylene glycol (PEG) to amphiphilic block copolymers and studied the crystallization modification effect of these block copolymers. It is found that the crystallization modification effect of the block copolymers is retained and gradually enhanced with P3HT content. The length of C8PDI crystals were well controlled from 2 to 0.4 μm, and the width from 210 to 35 nm. On the other hand, due to the water solubility of PEG block, crystalline PEG-b-P3HT/C8PDI micelles in water were successfully prepared, and this water phase colloid could be stable for more than 2 weeks, which provides a new way to prepare pollution-free aqueous organic semiconductor inks for printing electronic devices.
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PubMed
高影响因子
TOXICOLOGY LETTERS
·
2021
·
IF 4.374
Shanqi Guo,Yangyi Zhang,Shuo Wang,Tong Yang,Baojie Ma,Xiaojiang Li,Yizhuo Zhang,Xingkang Jiang
Antimony is a common environmental contaminant that causes biological toxicity in exposed populations worldwide. Previous studies have revealed that antimony promotes prostate cancer growth by stabilizing the c-Myc protein and mimicking androgen activity. However, the role of lncRNAs in the regulation of antimony-induced carcinogenesis remains unknown, and the precise mechanisms need to be explored. In the present study, we found that chronic exposure to antimony promoted cell growth and lipid metabolic disequilibrium in prostate cancer. Mechanistically, we identified a long noncoding RNA molecule, PCA3, that was substantially upregulated in LNCaP cells in response to long-term antimony exposure. Functional studies indicated that abnormal PCA3 expression modulated antimony-induced proliferation and cellular triglyceride and cholesterol levels. In addition, PCA3 levels were found to be inversely correlated with MIR-132-3 P levels by acting as a decoy for MIR-132-3P. Besides, SREBP1 directly interacted with MIR-132-3 P to increase cell growth and disrupt lipid metabolism by targeting its 3’UTR regions. Taken together, our results revealed that lncRNA PCA3 promotes antimony-induced lipid metabolic disorder in prostate cancer by targeting MIR-132-3 P/SREBP1 signaling.
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PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Xiao-mei Zhang,Wei-long Zhang,Hui Yu,Xiang-ting Dong,Long Xia
The porous Eu(TTA) 3 (TPPO) 2 /SnO 2 (ETTS, TTA: 2-thenoyltrifluoroacetonate and TPPO : triphenylphosphine oxide) composite was prepared via sol-gel method with tetraethyl orthosilicate (TEOS) as catalyst which showed the cumulate litchi shell-like structure. The Eu(TTA) 3 (TPPO) 2 organic complexes (ETT) could be absolutely distributed into the pores of the SnO 2 matrix at the molecular level through sol-gel process. SiO 2 was used as the hard template which was removed to increase porosity during the prepared process. The red emission of ETTS was exhibited under the 368 nm excitation light, and much better luminescence properties was shown after washing off SiO 2 (ETTS-W) which was about 4 times of unwashed ETTS (ETTS-UW) and 15.6 times of ETT for 615 nm emission when Eu content was 6 wt%. The excellent luminescence property of ETTS-W samples was mainly attributed to the organic ligands, the pore structure after removing SiO 2 and stronger ultraviolet absorption capacity of SnO 2 matrix.
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高影响因子
DRUG METABOLISM AND DISPOSITION
·
2020
·Vol. 48
·期 10
·966-971
·
IF 3.231
Yu-Meng Jia,Ting Zhu,Huan Zhou,Jin-Zi Ji,Ting Tai,Hong-Guang Xie
Curcumin, a major polyphenol present in turmeric, is predominantly converted to curcumin-O-glucuronide (COG) in enterocytes and hepatocytes via glucuronidation. COG is a principal metabolite of curcumin in plasma and feces. It appears that the efflux transport of the glucuronide conjugates of many compounds is mediated largely by multidrug resistance–associated protein (MRP) 3, the gene product of the ATP-binding cassette, subfamily C, member 3. However, it is currently unknown whether this was the case with COG. In this study, Mrp3 knockout (KO) and wild-type (WT) mice were used to evaluate the pharmacokinetics profiles of COG, the liver-to-plasma ratio of COG, and the COG-to-curcumin ratio in plasma, respectively. The ATP-dependent uptake of COG into recombinant human MRP3 inside-out membrane vesicles was measured for further identification, with estradiol-17β-d-glucuronide used in parallel as the positive control. Results showed that plasma COG concentrations were extremely low in KO mice compared with WT mice, that the liver-to-plasma ratios of COG were 8-fold greater in KO mice than in WT mice, and that the ATP-dependent uptake of COG at 1 or 10 μM was 5.0- and 3.1-fold greater in the presence of ATP than in the presence of AMP, respectively. No significant differences in the Abcc2 and Abcg2 mRNA expression levels were seen between Mrp3 KO and WT mice. We conclude that Mrp3 is identified to be the main efflux transporter responsible for the transport of COG from hepatocytes into the blood.
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PubMed
高影响因子
SOLID STATE SCIENCES
·
2021
·
IF 3.059
Yong Cao,Kangping Cui,Yihan Chen,Minshu Cui,Guanghong Li,Dong Li,Xiaojun Yang
Iron Oxychloride (FeOCl) was prepared by partial thermal decomposition and was studied as a heterogeneous Fenton catalyst to degrade tetracycline (TC). SEM, XRD , XPS technology were used to characterize its performance. The influencing factors of TC degradation efficiency were studied, including pH value, H 2 O 2 content, catalyst dosage and initial TC concentration. The results showed that under the optimal conditions, the degradation rate of 60 mg L −1 TC reached 92.9% within 60 min of reaction. The degradation process follows a second-order kinetic equation. Compared with other iron-based catalysts, FeOCl exhibited better catalytic and degradation effects. Moreover, FeOCl/H 2 O 2 system exhibited a wide pH range (from 3.0 to 7.0) for efficient degradation of TC and showed excellent stability and reusability. Meanwhile, based on the intermediates identified by HPLC-MS, two possible pathways for the degradation of TC were proposed. Further, the results of electron spin-resonance spectroscopy and radical quenching tests suggested that the ·OH formed in the FeOCl/H 2 O 2 system was mainly responsible for the degradation of TC.
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 20
·11643-11651
·
IF 3.119
Qi Xia,Hong Peng,Lin Yuan,Lifang Hu,Yu Zhang,Roger Ruan
The exploration of a highly efficient and environment-friendly solvent for dissolving hemicellulose is significant. In this study, 1-butyl-3-methylimidazolium carboxylate ([Bmim]carboxylate)-based ionic liquids (ILs), including [Bmim]formate, [Bmim]acetate, [Bmim]propionate, and [Bmim]butyrate, were used as solvents to dissolve arabinoxylan-rich hemicellulose from bamboo. The hemicellulose solubility in the ILs was determined as a function of temperature. The interaction between the hemicellulose and the ILs was evaluated by using 1H and 13C NMR techniques. The hemicelluloses regenerated from the saturated IL solutions were characterized. Results showed that the temperature and structure of carboxylate anions deeply affected the hemicellulose solubility. The carboxylate anion played a more important role than the imidazolium cation in hemicellulose dissolution. The hydrogen bond that formed between the ILs and the hydroxyl groups at the XC2 position of xylopyranose units of hemicellulose was stronger than that between the ILs and the hydroxyl groups at XC3 position of xylopyranose units. The hydrogen bond strength between the hemicellulose and the ILs was affected by the alkyl chain of the carboxylate anion and the hemicellulose concentration. The disruption of the inter- and intra-molecular hydrogen bonds in hemicellulose by the ILs was responsible for the hemicellulose dissolution. The main chain of hemicellulose remained nearly unchanged during the dissolution process.
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PubMed
高影响因子
Journal of Coatings Technology and Research
·
2020
·Vol. 17
·期 2
·563-572
·
IF 1.815
Li Dan,Xu Feigao
Silicon dioxide coatings modified by (3-aminopropyl)triethoxysilane (ATS) were studied to test their potential use as materials for stone protection. The synthetic route is simple and environmentally friendly due to the lack of volatile organic components. These materials are simply obtained by mixing tetraethylorthosilicate (TEOS), ATS, and OH-terminal polydimethylsiloxane (PDMS-OH). The ATS acts as a curing catalyst and coupling agent. The formulations can be directly applied onto stone substrates, particularly the external stone of buildings. Thus, the goal of an application of silicon dioxide modified by ATS is to restore and to protect building substrates. In the hybrid materials, PDMS acts to form bridges linking the silica particles. Finally, the effectiveness of these products as a stone consolidant and coating was assessed by multiple indicators, including the mechanical resistance, peeling performance, water uptake by capillarity, and contact angle.
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高影响因子
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2020
·Vol. 246
·期 5
·1017-1029
·
IF 2.366
Tian Ruochen,Suo Hao,Zhang Shuting,Sun Baoshan
A series of thiol-nucleophiles, captopril, l -cysteine, and tiopronin, were introduced to the degradation reaction of grape seed extracts and the eight new bioactive flavan-3-ol derivatives were observed. Then, these derivatives were successfully separated and prepared in large quantity by high-speed counter-current chromatography (HSCCC) and semi-preparative HPLC under the optimized separation conditions. The appropriate two solvent systems consisted of n- hexane – ethyl acetate – methanol – water (0.05:1.5:0.5:1.2, v/v/v/v) and n- hexane – ethyl acetate – water (1:10:10, v/v/v) with head – tail mode were used for HSCCC two-step separation of captopril degradation products. N- butanol – ethyl acetate – methanol – water (2:4:0.5:6, v/v/v/v) with a combination of tail – head and head – tail elution modes in HSCCC run of l- cysteine degradation products, and n- hexane – ethyl acetate – methanol – water (0.15:1.6:0.4:1, v/v/v/v) was applied with head – tail and tail – head elution modes in HSCCC separation of tiopronin degradation products. The structures of these derivatives were confirmed by MS and 1 H NMR analysis. Moreover, a systematic comparison of antioxidant activity of all the eleven degradation products was first implemented and found that most of the derivatives had stronger antioxidant activity than free catechins.
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高影响因子
Frontiers in Materials
·
2020
·
IF 2.705
Tian Huanrong,Liu Xin,Yang Yaokang,Wu Haitao,Zhang Zhiliang
Ce2(Zr0.94Sn0.06)3(MoO4)9 (CZSM) ceramics were synthesized via a traditional solid-state method. The effects of Sn-substitution on phase composition, microstructure, and microwave dielectric properties as a function of sintering temperature were discussed. The XRD results indicated that all the samples exhibited a single phase. The chemical bonds of CZSM ceramics were calculated based on P-V-L theory, which could be used to evaluate the relationship between structure and microwave dielectric properties. The tendency of dielectric constant was depended on the theoretical dielectric polarizability and bond ionicity. Moreover, the improvement of Q·f value was ascribed to the increase of packing fraction. The reduced τf value could be explained by decrease of the bond energy, enhanced the co-efficient of thermal expansion and increase of bond valence (VZr(Sn)). The complex permittivity values were obtained from infrared reflectivity spectra. The dielectric permittivity and loss were 10.92 and 3.08 × 10−4, respectively, which agreed well with the measured value. Typically, the optimal microwave dielectric properties of εr = 10.35, Q·f = 59,660 GHz (at 9.70 GHz), and τf = −7.52 ppm/°C were achieved in CZSM ceramics sintered at 800°C for 6 h.
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高影响因子
危险品化学品经营许可证（带存储）