BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2021
·
IF 3.575
Dandan Zheng,Jinglong Wang,Genju Li,Lulu An,Ying Qu,Qinxiu Zhang,Wenhui Ye,Xin Zhao,Zhongxi Zhao
Autophagy-impairment is involved in the pathological process of chronic obstructive pulmonary disease (COPD), and relates to inflammation and emphysema in lung injury. This study aimed to elucidate the protective effect of S -Allylmercapto- N -acetylcysteine (ASSNAC) against COPD via regulating the autophagy. Firstly, porcine pancreatic elastase (PPE)-induced COPD model in A549 cells was established, and ASSNAC was verified to alleviate the autophagy-impairment from the results of western blotting analysis of LC3BⅡ/Ⅰ and monodansylcadaverine (MDC) staining of autophagosome . Secondly, Balb/c mice were stimulated by PPE to induce the COPD model in vivo . The histological analysis of lung tissues presented that ASSNAC could alleviate the lung injury induced by PPE. Thirdly, the secretions of NO , TNF- α and IL-1 β in serum and BALF were reduced by ASSNAC compared with the PPE group. Finally, the mechanism of therapeutic effects of ASSNAC against COPD through regulating the autophagy-impairment was clarified. That is, ASSNAC inhibits the phosphorylation of PI3K/Akt/mTOR signaling pathways. In a word, this research provides a reference for ASSNAC to be an effective drug for pulmonary diseases.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Zhi Xu,Le Li,Xiaoxia Chen,Guyu Xiao
The fabrication of high-performance metal-free carbon catalysts for the oxygen reduction reaction (ORR) is of practical importance for the energy sector. A novel fabrication strategy was used to prepare high-performance N,S-codoped mesoporous carbons (NSMPCs) as ORR catalysts, involving the preparation of poly(3-aminothiophenol)-based assemblies followed by subsequent pyrolysis. The N and S heteroatoms of the poly(3-aminothiophenol) are incorporated into the NSMPCs by pyrolysis, forming abundant catalytic active sites. The mesopores of NSMPCs locate on their surface, which are derived from the degradation of the micelle templates. These shallow mesopores greatly enhance the specific surface area and promote the mass transfer for the ORR. Moreover, the embedded graphene (or carbon nanotube) in the NSMPCs facilitates electron transport during the ORR. These factors are synergistically modulated to boost the catalytic performances of NSMPCs. As a result, NSMPCs exhibit superb catalytic performances, close to or better than those of the best performing metal-free carbon ORR catalysts reported to date and commercial Pt/C in alkaline electrolyte. This synergistic strategy provides a facile pathway for the fabrication of advanced metal-free carbon ORR catalysts.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 6
·3770-3776
·
IF 3.361
Guangtao Qian,Fengna Dai,Haiquan Chen,Mengxia Wang,Mengjie Hu,Chunhai Chen,Youhai Yu
5-Amine-2-(4-amino-benzene)-1-phenyl-benzimidazole (N-PhPABZ) was successfully synthesized and polymerized with 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA) to obtain a novel N-phenyl-poly(benzimidazole imide) (N-Ph-PBII). The successful incorporation of N-phenyl addressed the issue of high H2O-absorption of traditional PBIIs while retained the superheat resistance property. The resulting N-Ph-PBII possessed a high glass-transition temperature (Tg) up to 425 °C and a low affinity for water of 1.4%. Furthermore, the loose molecular packing and noncoplanar structures led to an increase in optical transparency for the modified PBII.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2020
·
IF 14.588
Xiaoxiang Fan,Ruming Yuan,Jie Lei,Xiaodong Lin,Pan Xu,Xueyang Cui,Lin Cao,Mingsen Zheng,Quanfeng Dong
The shuttle effect of dissolved polysulfides produced during the operation of lithium–sulfur batteries is the most serious and fundamental problem among many challenges. We propose a strategy via in situ formation of a functionalized molecule with a dual-terminal coupling function to bind the dissolved polysulfide intermediates, thus turning them back into solid-state organopolysulfide complexes by molecule binding, and then the polysulfides can be pinned on the cathode firmly. The dual-terminal coupling functional molecule binder (MB), which is formed in situ by reaction between quinhydrone (QH) and lithium, can not only bind polysulfides by reversible chemical coordination but also promote the conversion of polysulfides during cycling synchronously. In theory, with the dual-terminal coupling function, MB can bind polysulfide intermediates to copolymerize them, forming −[MB-Li2Sn]– that has faster reaction activity and redox conversion kinetics in comparison with simple Li2Sn. With the MB, the Li–S battery exhibits a large initial capacity of 1347 mAh g–1 at 0.1 C. The remaining capacity of 963 mAh g–1 at 1 C shows no obvious decay for more than 400 cycles, and the retention of the first 300 cycles can reach 96.9%, in particular. This study delivers an alternative approach to resolving the shuttle effect and achieving excellent Li–S battery performance, with the potential significance going way beyond battery systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Mengge Shang,Jing Zhang,Xiaochan Liu,Yi Liu,Sipeng Guo,Shimo Yu,Serguei Filatov,Xibin Yi
A novel N, S self-doped hollow-sphere porous carbon is directly prepared from abundant biomass puffball spores via a simple carbonization and KOH activation process for the first time. The electrochemical properties and porous structure of these carbons are explored by adjusting the amount of KOH. It is found that the obtained N, S self-doped hollow-sphere porous carbon with a KOH to carbon mass ratio of 4 (NS-HPC-4) exhibits the largest specific surface area (1431 m 2 /g), a well-developed hierarchical porous structure and moderate N/S contents. As a result, the NS-HPC-4 electrode in the supercapacitor delivers a large specific capacitance of 285 F/g at 0.5 A/g in KOH electrolyte. Furthermore, the symmetric supercapacitor based on NS-HPC-4 exhibits an energy density of 10.9 Wh/kg at a power density of 400.4 W/kg in 2 M KOH aqueous electrolyte, and achieves a high energy density of 58.4 Wh/kg at a high power density of 876.0 W/kg in 1 M Et 4 NBF 4 /AN organic electrolyte. These excellent results confirm that puffball spores derived porous carbons are promising candidates to be used in high performance supercapacitors.
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2020
·Vol. 2020
·期 36
·3466-3473
·
IF 2.529
Yongcen Lin,Xue Dong,Lang Zhao
Graphical In this paper, a highly efficient nano-catalyst was synthesized using thiosalicylic acid modified ZIF-(1:2.5) as precursor, which was used to catalyze the reduction of 4-nitrophenol, methyl orange, methylene blue, and congo red. The catalyst shows excellent performance. Mesoporous catalyst S-ZIF-(1:2.5)@Ni x S y was prepared using ZIF-(1:2.5) as a precursor. These composite materials were characterized by using scanning microscope (SEM), transmission electron microscopy(TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N 2 adsorption-desorption techniques, and studied as catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP), congo red (CR), methyl orange (MO), and methylene blue (MB). The BET specific surface area and pore volume of the catalyst were 167.49 m 2 /g and 0.32 m 3 /g respectively. The doping of S improves the catalytic performance of the catalyst. S-ZIF-(1:2.5)@Ni x S y showed an excellent catalytic rate ( k app = 22.3 × 10 –3 /s) in the experiment of reductive degradation of 4-NP. In addition, S-ZIF-(1:2.5)@Ni x S y also showed good catalytic activity for the degradation of CR, MB, and MO, completing the catalytic reaction within 60, 60, and 90 s, respectively. The k app values for CR, MB, and MO are 29.0 × 10 –3 /s, 44.0.0 × 10 –3 /s, and 29.2 × 10 –3 /s, respectively.
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Summaira Saghir,Zhenggang Xiao
Metal-organic frameworks (MOFs) are traditional porous materials considered as efficient and low-cost for the removal of organic dyes from polluted water. In this study, we report a new type of hierarchical porous zeolitic imidazole frameworks −67@ layered double hydroxide (ZIF-67@LDH) consisting of nanocubes decorated with nanosheets . The prepared ZIF-67@LDH contains versatile functionalities which exhibit superior adsorption efficiency and adsorption rate for Methyl Orange (MO) and Alizarine Red S (ARS). The influence of pH, temperature, and contact time were analyzed in detail. The kinetics study revealed that the adsorption of MO and ARS over ZIF-67@LDH followed pseudo-second order (PSO) kinetic model , and adsorption isotherms were best described by the Langmuir isotherm model. Adsorption isotherms confirm the monolayer adsorption of MO and ARS over ZIF-67@LDH. The prepared material also shows outstanding recyclability with negligible loss. Thus ZIF-67@LDH presented a promising candidate for treating MO and ARS containing wastewater.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Qian Zhang,Bing Xin Wang,Si Chen,Shu Yuan Zhang,Jun-ming Hong
The operation efficiency of electrocatalysis is strongly influenced by the characteristics of anode materials. Thus, this study on electrochemical oxidation was conducted on the basis of the oriental design of electrode materials as a means of achieving maximal and stable degradation efficiency. Heteroatom hybrid graphene oxides (GO) have recently been regarded one of the major matrices popularly used for electrode materials due to their excellent electronic properties and long-term operation stability. However, the doping species of heteroatoms are uncontrollable, and the corresponding structural effects and mechanism are unclear. Moreover, the use of electrocatalytic technology is still not a promising approach for system optimization. With the view of significantly improving operational performance, single/multiple-form S-doped GO (SGO) were designed and prepared as anodes by using radical and non-radical precursors. Bisphenol A (BPA) was used as the model contaminant to elucidate the degradation efficiency of the electrocatalytic oxidation. Results indicate that the dominated active radicals of O 2 − were more likely generated as C SOx C at the GO edge rather than as S in the skeleton. The source of O 2 − was not from the dissolved O 2 but from the surface functional oxygen groups and the C SOx C on the catalysts. However, the S in the skeleton highly contributed to the stability of the catalyst. Moreover, analytical results based on density functional theory (DFT) calculation confirmed the influence of the heteroatom species on the efficiency of the electrocatalytic oxidation and the proposed mechanism. This proposal can provide an in-depth understanding of the mechanism of electrocatalysis and an optimal operation strategy when using related carbon materials for practical applications.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Zhen Xiao,Yao Li,Wenkui Zhang,Hui Huang,Yongping Gan,Jun Zhang,Chu Liang,Qinzhong Mao,Peng Liao,Yanxian Jin,Yang Xia
Originating from the severe polysulfide dissolution and notorious polysulfide shuttle, the practical applications of lithium-sulfur (Li-S) batteries confront huge challenges in low active material utilization, rapid capacity degradation, short cycling lifespan, and inferior rate capability. Herein, a rationally modified polypropylene (PP) separator with multi-functional nickel hydroxide@carbon nanotube (NiOOH@CNT) coating layer is proposed to overcome these critical obstacles. The conductive and porous CNT networks ensure the rapid electron/ion transport to achieve high reactivation and reutilization of active materials, as well as physically block the polysulfide migration. Meanwhile, the porous NiOOH nanowalls arrays layer with polar surface demonstrates superior chemical absorption ability for anchoring polysulfides, thereby significantly suppressing the shuttle effect. Such elaborately designed separator endows Li-S batteries with high specific capacity, superior capacity retention and remarkable rate capability. This work sheds new light on the multi-functional separators for high-performance Li-S batteries.
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2020
·
IF 3.31
Rongmei Yu,Furong Yin,Chunying Pu,Haizhen Song,Xiumei Xu,Han Zhang,Wenyu Ji
Although much effort has been made to the cadmium-free quantum dot light emitting diodes (QLEDs), it is still a big challenge to achieve an efficient eco-friendly QLED. Here, an extremely efficient QLED based on Ag–In–Zn–S QDs is constructed with the insertion of an 1,3,5-tris(N-phenylbenzimidazole-2-yl)benzene (TPBi) hole-spacing interlayer. The electrical properties of single carrier devices demonstrate the TPBi blocks the hole injection, leading to a more balanced charge injection in the device. Transient electroluminescence measurements confirm that the hole accumulation adjacent QDs is dramatically suppressed after the insertion of TPBi, hence limiting the interactions between excitons and holes. Consequently, the peak current (power) efficiency of 6.0 cd/A (6.5 lm/W) is achieved. To the best of our knowledge, this is the record efficiency for the Ag–In–Zn–S QLEDs reported to date. We anticipate this work will provide a new route for optimizing the performance of Cd-free QLEDs.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 38
·期 11
·1171-1177
·
IF 3.154
Lang Mu-Ning,Chi Wei-Wen,Han Ting,Zhao Qing-Zhen,Li Hong-Kun,Tang Ben Zhong,Li Yong-Fang
Azide-alkyne click polymerization has become a powerful tool for polymer synthesis. However, the click polymerization between internal alkynes and azides is rarely utilized to prepare functional polymers. In this work, the polymerization reactions of activated internal alkyne monomers of tris(2-butynoate)s ( 1 ) with tetraphenylethene-containing diazides ( 2 ) were performed in dimethylformamide (DMF) under simple heating, affording four hyperbranched poly(methyltriazolylcarboxylate)s ( hb -PMTCs) with high molecular weights ( M w up to 2.4 × 10 4 ) and regioregularities (up to 83.9%) in good yields. The hb -PMTCs are soluble in common organic solvents, and thermally stable with 5% weight loss temperatures up to 400 °C. They are non-emissive in dilute solution, but become highly emissive in aggregated state, exhibiting aggregation-induced emission characteristics. The polymers can generate fluorescent photopatterns with high resolution, and can work as fluorescent sensors to detect nitroaromatic explosive with high sensitivity.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Xiaofei Ma,Yingxiang Du,Xinqi Zhu,Jiangxia Yang
Recently, chiral ionic liquids have attracted increasing attention in analytical chemistry . However, only a few papers focus on the application of them in visual chiral recognition. Herein, two functionalized chiral ionic liquids derived from (S)-mandelic acid (1-butyl-3-methylimidazolium mandelate , CIL1 and N-butyl-N-methylpyrrolidinium mandelate, CIL2) were prepared for visual chiral recognition of aromatic amino acids for the first time. In the presence of Cu(II) and appropriate solvents, visual enantiomeric responses of phenylalanine , tryptophane, tyrosine and phenylglycine were observed. Relying on solubility or color differences, all chiral recognition could be finished within 5 min. The potential mechanism was investigated by means of infrared spectroscopy, ultraviolet spectroscopy, thermal gravity analysis, elemental analysis and scanning electron microscope. Results revealed that CuSO 4 interacted with CIL1 and D-tryptophane in the ratio of 1:1.96:0.43 in relevant precipitate, and the different stability of complex was responsible for the chiral recognition. In addition, resolution of racemic tryptophane was performed, which offered excellent enantiomeric excess values (94.2% for CIL1 and 95.1% for CIL2 in solid phase). The proposed ionic liquids had strong enantioselectivity for aromatic amino acids and great potential in visual chiral recognition.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）