DALTON TRANSACTIONS
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2015
·Vol. 45
·期 6
·2444-2453
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IF 4.197
Ying-juan Hao,Fa-tang Li,Jun Zhao,Rui-hong Liu,Xiao-jing Wang,Yu-pei Li,Ying Liu
Porous sphere-like tricobalt tetraoxide (Co3O4)–cobalt chloride hydrate (CoCl2·6H2O, CCH) heterojunctions are obtained using a one-step facile solution combustion route. The heterostructure is confirmed by XRD, HRTEM, and XPS measurements. Their photocatalytic performances are evaluated by the degradation of methyl orange (MO) and the reduction removal of Cr(VI) ions under visible light irradiation. The heterojunction containing 81.5 wt% Co3O4 and 18.5 wt% CCH exhibits the highest photocatalytic performance, for which the pseudo-first-order reaction rate constant is 10.0 and 8.7 times that of pure Co3O4 towards MO degradation and Cr(VI) reduction, respectively. This enhancement in activity can be attributed to the effective electron transfer from the conduction band of Co3O4 to that of CCH, which is verified with a double increase of the photocurrent valve of the heterojunction sample electrode in comparison with the bare Co3O4 sample electrode. Electron paramagnetic resonance, fluorescence spectrophotometry and scavenger experiments indicate that photo-induced holes, and hydroxyl and superoxide anion radicals are the active species responsible for the photo-oxidation of MO. The reasons for the formation of these species are discussed and proposed based on the band gap structures of Co3O4 and CCH. The recycling experiment results indicate that the activity can be regained by a remedial experiment.
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
Electrocatalysis
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2022
·Vol. 13
·期 5
·622-629
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IF 2.933
Guan Pingping,Zhang Xin,Liu Aimin,Liu Fengguo,Shi Zhongning
Cobalt is a good material for catalysis, energy, and many other applications. In this study, a cobalt coating was prepared by applying electrodeposition in an ethylene carbonate (EC) -AlCl 3 -CoCl 2 electrolyte system at 333 K. The electrical conductivity of the 0.97EC-0.02AlCl 3 -0.01CoCl 2 system at 318–363 K varied with the temperature based on the following relation: σ = 70.3876 – 0.4035 T + 6.4394 × 10 −4 T 2 (µS/cm). Cyclic voltammetry and chronoamperometry analyses showed that the electrodeposition of cobalt was an irreversible process, and controlled by diffusion. The diffusion coefficient was 1.92 × 10 −8 cm 2 /s. Cobalt coating was achieved by applying electrodeposition under different conditions at − 0.4 to − 0.7 V (vs. Ag/AgCl). The cobalt coating electrodeposited at − 0.5 V for 2 h was found to be dense, with a grain size of 0.5 µm. Graphical Abstract
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Haifeng Jiang,Wenpeng Hong,Yu Zhang,Sunhua Deng,Jie Chen,Chen Yang,Haoshu Ding
In this work, the effects of the coupling between montmorillonite and CoCl 2 ·6H 2 O on pyrolysis behavior, products distribution and characteristics of liquid fuel were investigated by the combination of pyrolysis experiment and kinetic analysis. The mass fraction of the MMT in oil shale was 3–9%, and the mass fraction of CoCl 2 ·6H 2 O was 10–25%. The results showed that the coupling effect promoted the formation of shale oil. The maximum yield of shale oil (17.75 wt%) was obtained at 20CoCl 2 ·6H 2 O5MMT. Catalytic pyrolysis behavior and kinetic analysis indicated that the presence of CoCl 2 ·6H 2 O and montmorillonite led to the prominent advance of kerogen decomposition temperature and the decrease of apparent activation energy. Significantly, the addition of the 20CoCl 2 ·6H 2 O5MMT led that the average apparent activation energy was decreased by about 122.42 kJ/mol compared to the catalyst-free pyrolysis. The strong cracking ability produced by their coupling effect was considered to be the main reason. Montmorillonite and CoCl 2 ·6H 2 O enhanced the decarboxylation and free-radical reaction, resulting in a decrease of acids yield and an increase of aliphatic hydrocarbons yield. The relative content of aliphatic hydrocarbons increased from 41.55% to 51.27%. These results demonstrated that the combined use of montmorillonite and CoCl 2 ·6H 2 O was beneficial to the generation of saturated hydrocarbon production.
研究领域:
化学工程
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能源科学
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DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-14
·
IF 3.8
Zheng Zihan,Liu YiZhen,Chen Danli,Yang Jianjun,Ren Lingxuan,Jin Zhen,Wang Weirong,Liu Xuyang,He Jianyu,Zheng Nanbo,Lin Rong
Background and purpose: Catalpol (CAT) has diverse pharmacological functions, including cellular homeostasis maintenance and anti-inflammatory effects. Sirtuin 5 (SIRT5) plays a considerable role in regulating cellular homeostasis in cardiac diseases. Our research explores the therapeutic potential of CAT against myocardial injury and its underlying mechanism. Methods: The H9c2 cells were pretreated with different CAT concentrations for 24 h, or CAT for 24 h followed by CoCl 2 stimulation. Cell viability was determined with MTT assay. Biochemical assays, western blotting, and quantitative real-time PCR (qRT-PCR), combined with bioinformatic analysis, were used to examine the impact of CAT on CoCl 2 -induced myocardial injury in H9c2 cells and further explore its molecular mechanisms. Results: CAT ameliorated levels of myocardial enzymes, increased nicotinamide adenine dinucleotide (NAD + /NADH) ratio and adenosine triphosphate (ATP), while inhibited lactic acid (LD), tumor necrosis factor-alpha (TNF-α), interleukin (IL)-1β, and IL-6 in CoCl 2 -induced H9c2 cells. Mechanistically, SIRT5 knockdown inhibited Lin28a expression and negated the effects of CAT on ATP level, LD content, and the expression of inflammatory factors in cells. CAT likely exerted its protective effects on myocardial function through the SIRT5-mediated signaling pathway. Conclusions: CAT regulates energy metabolism and inflammation via the SIRT5-mediated signaling pathway, exerting a protective effect in myocardial injury.
研究领域:
药理学
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心脏病学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2013
·Vol. 4
·期 3
·773-779
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IF 3.753
Qinzhuo Zhou,Bo-Geng Li,Suyun Jie,Na Zheng
A series of phosphine-containing cobalt complexes [CoCl2(PRPh2)2, R = Ph (1), Cy (2), nPr (3), Et (4), Me (5), H (6)] has been used for the highly active and stereospecific polymerization of 1,3-butadiene upon activation with ethylaluminum sesquichloride (EASC). The high catalytic activities and polybutadienes with high cis-1,4 selectivity were obtained in the solution polymerization in toluene. The conversion of butadiene and the microstructure and molecular weight of the resulting polymers were affected by reaction parameters and the R group on the phosphine ligand. The dispersion medium was also a sensitive factor for the current catalytic systems, influencing the catalytic activity and properties of products. In comparison with the solution polymerization in toluene, the heterogeneous polymerization in isooctane yielded slightly lower catalytic activity, cis-1,4 content and molecular weight under similar reaction conditions.
研究领域:
高分子化学
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催化化学
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DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Tingting Li,Haoxuan Zhang,Tianyu Li,Liyong Wang,Guang Jia,Jianzhong Xu,Haiyun Ma
Designing reversible thermochromic material that integrate fire warning capabilities and flame retardancy is of great significance for optimizing fire safety systems. In this work, cobalt chloride (CoCl 2 ) is introduced as both a color developer and flame-retardant component into the PVA (Polyvinyl alcohol) matrix, combined with flame-retardant synergists (tetrakis (hydroxymethyl)phosphonium sulfate (THPS), Al(OH) 3 , Na-MMT, or Ca-MMT) to fabricate a series of novel reversible thermochromic PVA/CoCl 2 films with excellent flame retardancy. The composites films exhibit remarkable reversible thermochromic performance, transitioning between pink and blue within the temperature range of 30–150°C, and the underlying thermochromic mechanism based on coordination configuration transformation is systematically elucidated. By integrating with a color recognition system, the films enable remote and intelligent early fire warning. Moreover, the films demonstrate superior flame-retardant properties, achieving UL-94 V-0, significantly improved LOI value, and a reduction of up to 91.8% in heat release and 87.4% in smoke release during combustion. Owing to their rapid color response to temperature fluctuations, the films also hold significant potential for smart window applications. Consequently, this work offers a promising strategy for the development of multifunctional intelligent materials for fire protection and energy-saving applications.
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产品关联
DOI
高影响因子
CHEMICO-BIOLOGICAL INTERACTIONS
·
2025
·
IF 5.4
Lili Lu,Yuchen Ma,Qing Tao,Jing Xie,Xiao Liu,Yongkang Wu,Yang Zhang,Xiuli Xie,Mingming Liu,Yong Jin
Liver fibrosis is a passive and irreversible wound healing process caused by chronic liver injury. Research has shown that the upregulation of hypoxia inducible factor-1 alpha (HIF-1α) is closely related to the occurrence and development of liver fibrosis and HIF-1 α may be a promising target for the treatment of liver fibrosis. AMSP-30 m is a newly developed novel HIF-1α inhibitor by our group, which has strong anti-tumor and anti-inflammatory effects. In this study, we described the therapeutic effect and specific mechanism of AMSP-30 m on carbon tetrachloride (CCl 4 ) induced liver fibrosis in mice. Liver fibrosis induced by CCl 4 in mice and liver fibrosis induced by cobalt dichloride (CoCl 2 ) in LX-2 cells (human hepatic stellate cell (HSC) line) were studied. Hematoxylin & eosin (H&E)and Masson's trichrome staining were used to observe pathological conditions. Western Blot, immunofluorescence and immunohistochemistry were used to detect protein expression and localization in cells, and quantitative real-time PCR analysis (qRT-PCR) was used to detect mRNA expression. Biochemical detection kits were used to detect alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels. The results demonstrated that AMSP-30 m significantly alleviated pathological symptoms, reduced ALT and AST levels, and inhibited the expression of alpha-smooth muscle actin (α-SMA) and collagen type I (COL1α1) in CCl 4 -induced liver fibrosis in mice. AMSP-30 m could significantly reduce the expression of HIF-1α and sonic hedgehog (Shh) pathway related proteins (Smoothened (Smo), Shh, and glioma-associated oncogene-1 (Gli-1)) in CCl 4 induced liver fibrosis mice. AMSP-30 m also played a similar role in the CoCl 2 -induced anoxic liver fibrosis model of LX-2 cells . Further experiments showed that Cyclopamine (a Shh inhibitor) could significantly inhibit the increase of α-SMA and COL1α1 resulting from HIF-1α but not significantly inhibit HIF-1α induced by CoCl 2 in LX-2 cells. And the combination of Cyclopamine and AMSP-30 m further reduced the expression of α-SMA and COL1α1 induced by HIF-1α. In summary, this study demonstrates that the HIF-1α inhibitor AMSP-30 m exerts a robust anti-fibrotic effect by inhibiting the Shh pathway, which is identified as a critical underlying mechanism. These findings suggest a promising therapeutic strategy for the treatment of liver fibrosis.
研究领域:
分子生物学
·
药理学
·
肝病学
·
细胞生物学
·
生物化学
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DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 34
·20073-20081
·
IF 3.945
Ruifen Shi,Fengyi Zhou,Yu Chen,Zhenghui Liu,Shuzi Liu,Tiancheng Mu
Deep eutectic solvents (DESs) are well-known as novel solvents due to their unique properties, which are indispensable for the development of green chemistry in the future. CoCl2·6H2O and NiCl2·6H2O-based DESs, which could be called magnetic DESs (MDESs) for short in view of their responsive behavior to an external magnetic field, have been widely used in many industrial applications, such as biomass treatment, electrolytes, and material preparation. For better application and full-scale development of these MDESs in various fields, eleven MDESs were prepared in this work by using CoCl2·6H2O and NiCl2·6H2O as hydrogen bond acceptors (HBAs) with alcohols, carboxylic acids and amides as hydrogen bond donors (HBDs), respectively. The intermolecular interactions between the components of MDESs were characterized via FTIR, 1H NMR and DSC analysis. In addition, physicochemical properties including density, viscosity, conductivity, ionicity, pH values, surface tension, thermostability and solvatochromic parameters were investigated. All MDESs exhibit acid characteristics and have good conductivity comparable with ionic liquids (ILs) and other DESs used for electrolytes. The results show that stronger H-bonding networks in Ni-based MDESs make them have higher density, viscosity, polarity and surface tension values than Co-based MDESs. Moreover, all prepared MDESs possess a good conductivity behavior which could be comparable to that of common organic solvents and ILs. According to this work, we could better comprehend the behavior of Co/Ni-based MDESs and choose the appropriate one for particular applications.
研究领域:
化学
·
材料科学
·
绿色化学
·
工业应用
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DOI
高影响因子
危险品化学品经营许可证（带存储）