Nano Energy
·
2017
·
IF 12.343
Shao-Qing Liu,Hao-Ran Wen,Ying-Guo,Yan-Wu Zhu,Xian-Zhu Fu,Rong Sun,Ching-Ping Wong
Highly active, durable and cost-effective eletrocatalysts are crucial for hydrogen evolution reaction (HER). Herein, we report novel hollow hybrid spheres comprising of amorphous Ni(OH) 2 and crystalline CuS mesoporous nano-shelled heterostructures as efficient HER electrocatalysts . Spherical Cu 2 O particles are used as templates for fabrication of Ni(OH) 2 @CuS hollow spheres with nano-shelled heterostructures . The as-obtained catalysts exhibit much higher performance than the single Ni(OH) 2 , CuS, their physical mixture and crystalline Ni(OH) 2 @CuS toward water electrochemical reduction in alkaline medium . The superior HER electrocatalytic performance might be attributed to the unique hollow mesoporous nanoshelled architecture and the heterostructured synergetic effects between amorphous Ni(OH) 2 and crystalline CuS, in which the short-range order of the inner amorphous Ni(OH) 2 mesoporous shell creates abundant active sites on the surface, and the conductive CuS out layer promotes electron transportation. This work might open a door for designing and synthesizing of hollow nanomaterials with mesoporous nano-shelled heterostructures consist of amorphous and crystalline phase for applications in electrochemical catalysis and energy conversion.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Shihu Ding,Peng Tan,Jiaxin Wen,Tielong Li,Wei Wang
As a member of chlorophenolic compounds, 2-chlorohydroquinone (H 2 QCl) has been widely used as intermediates in various chemical industries and leaded to serious threat on the environment. It is urgent to develop simple and robust analytical method for sensitive and selective determination of H 2 QCl. Carbon quantum dots (CQDs), a promising photoluminescence nanomaterial , have gained sufficient concern as optical sensors owing to their outstanding photochemical properties. In this work, nitrogen doped carbon quantum dots (N-CQDs) were successfully synthesized by a simple secondary hydrothermal method and applied as a fluorescent probe for the quantitation of H 2 QCl. A new fluorescence region centered at excitation wavelength of 310 nm and emission wavelength of 390 nm appeared after nitrogen doping. It was found that the N-CQDs exhibited a high selectivity towards H 2 QCl with sensitive fluorescence response and the fluorescence quenching of N-CQDs was linear with the concentration of H 2 QCl in the range of 30–90 μM (Y = 0.0049X + 0.1255, R 2 = 0.996). This is the first time that the dual role of excitation light was observed in the fluorescence detection system. The ultraviolet light acted as not only the excitation energy source for N-CQDs photoluminescence, but also the light source for photolysis of H 2 QCl. In the detection process, H 2 QCl was degraded to p-benzoquinone by light, and then the CQDs combined with p-benzoquinone through Michael addition reaction under the action of doped nitrogen. The electron transfer from N-CQDs to the linked p-benzoquinone caused the quenching of fluorescence originated from the edge state of N-CQDs. Furthermore, this established method can be applied for the quantitative determination of H 2 QCl in environmental water samples with satisfactory recoveries between 94.31 and 105.51%.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
TRANSITION METAL CHEMISTRY
·
2013
·Vol. 38
·期 4
·463-471
·
IF 1.184
Zhang Nan,Fan Yu-Hua,Bi Cai-Feng,Zhao Yu,Zhang Xia,Zhang Dong-Mei,Huang Gui-Mei
A pair of stereoisomers of nickel Schiff base complexes, namely [Ni(C 17 H 15 N 4 O 2 ) 2 ·2CH 3 OH] n ( 1 ) (C 17 H 15 N 4 O 2 = 2-acetylpyrazine- l -tryptophan) and [Ni(C 17 H 15 N 4 O 2 ) 2 ·2CH 3 OH] n ( 2 ) (C 17 H 15 N 4 O 2 = 2-acetylpyrazine- d -tryptophan), were synthesized and characterized by physico-chemical and spectroscopic methods. The X-ray diffraction single-crystal analyses indicate that the structure of 2 is essentially 0D monomeric, while a 2D layer structure is formed through N–H…O intermolecular hydrogen bonds for 1 . The interactions between complex 1 and calf thymus DNA were investigated by spectroscopic and viscometric methods. The results indicate that complex 1 interacts with DNA very strongly ( K
b = 1.01 × 10 7 mol −1 L and K
sq = 1.11). The nature of the binding seems to be mainly an electrostatic interaction between DNA and the complex. However, other binding modes, such as hydrogen bonding, may also be present in this system.
研究领域:
无机化学
·
配位化学
·
生物无机化学
·
分子药理学
·
核酸化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Jiaguang Zheng,Zhendong Yao,Xuezhang Xiao,Xuancheng Wang,Jiahuan He,Man Chen,Hao Cheng,Liuting Zhang,Lixin Chen
Novel porous hollow carbon nanospheres (HCNS) have been synthesized and utilized as scaffold for LiBH 4 –Mg(BH 4 ) 2 eutectic borohydride (LMBH). Large loading amounts of LMBH (33, 50 and 67 wt%) have been melt-infiltrated into HCNS, and the significantly improved dehydrogenation properties have been discovered. The LMBH@HCNS composites not only exhibit high actual dehydrogenation amounts and fast hydrogen desorption rates, but also an increased reversible hydrogen storage capacities after three cycles without obvious degradation. Further structural tests have revealed that the over-infiltrated LMBH covering the spherical surface of HCNS could also contribute to the improved hydrogen storage behaviors, due to a strong interfacial adhesion effect that avoid LMBH from aggregation during de/rehydrogenation cycles.
研究领域:
材料科学
·
化学工程
·
能源存储
✓ 已验证
DOI
高影响因子
LABORATORY INVESTIGATION
·
2023
·
IF 5
Zhiguang Chen,Haibin Zhao,Lingshuai Meng,Shengwei Yu,Zhenning Liu,Jinqi Xue
Fracture healing is a complex physiological process in which angiogenesis plays an essential role. Microfibril-associated glycoprotein-2 (MAGP2) has been reported to possess a proangiogenic activity via integrin αvβ3, yet its role in bone repair is unexplored. In this study, a critical-sized femoral defect (2 mm) was created in mice, followed by the delivery of an adenovirus-based MAGP2 overexpression vector or its negative control at the fracture site. At days 7, 14, 21, and 28 postfracture, bone fracture healing was evaluated by radiography, micro–computed tomography, and histopathologic analysis. Adenovirus-based MAGP2 overexpression vector–treated mice exhibited increased bone mineral density and bone volume fraction. MAGP2 overexpression contributed to an advanced stage of endochondral ossification and induced cartilage callus into the bony callus. Further analysis indicated that MAGP2 was associated with enhanced angiogenesis, as evidenced by marked MAGP2 and integrin αvβ3 costaining and increased levels of endothelial cell markers such as endomucin and CD31, as well as elevated phosphorylation of protein tyrosine kinase 2 (PTK2) and AKT serine/threonine kinase 1 (AKT) in the callus. In vitro , recombinant human MAGP2 treatment enhanced the viability, migration, and tube formation ability of human microvascular endothelial cells, which was partially reversed by integrin αvβ3 inhibition or MK-2206, a specific AKT inhibitor. Inhibition of integrin αvβ3 abolished MAGP2-induced PTK2 and AKT activation. Taken together, our data provide the first evidence that MAGP2 promotes angiogenesis and bone formation by activating the integrin αvβ3/PTK2/AKT signaling pathway.
研究领域:
骨科
·
生物学
·
分子生物学
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 45
·23853-23860
·
IF 3.708
Pranav K. Tripathi,Mingxian Liu,Lihua Gan
Synthesis of carbon materials with enhanced surface areas, and regular and tuned pore diameters is always a great challenge. In this report, ordered mesoporous carbons (OMCs) were synthesized by the one-step assembly of tri-constituents, and the OMCs were applied as an adsorbent for the removal of the highly hazardous water pollutant di(2-ethylhexyl)phthalate (DEHP). Phloroglucinol–formaldehyde based carbon precursor was in situ prepared during the assembly of the tri-constituents, and the surface area and mesopore diameter of the OMCs were tuned by variation of the molar ratio of formaldehyde to phloroglucinol. Small angle X-ray diffraction patterns revealed that the obtained carbons are highly ordered, which is in agreement with the measuring results of transmission electron microscopy at low and high resolution. Scanning electron microscopy images demonstrate that OMC-F2.0 has a hierarchical morphology. Nitrogen adsorption–desorption measurements revealed that the surface area of the OMCs (956–1801 m2 g−1) was dependent on the molar ratio of the carbon precursor constituents (formaldehyde to phloroglucinol). By varying the molar ratio of formaldehyde to phloroglucinol from 1.0 to 4.0, the mesopore diameter of the OMCs was shifted to the higher side, from 2.1 to 3.1 nm. DEHP was efficiently removed from a model water pollutant by the OMCs. OMC-F2.0 achieved the highest adsorption capacity of 364 mg g−1 for the removal of DEHP. The adsorption equilibrium data were treated with the two mathematical models of Langmuir and Freundlich, and the results revealed that decontamination was more favorable with the Langmuir model. This concludes that the removal of DEHP by OMCs depends on the surface area, and the DEHP molecules occupied the porous space of the OMCs in a monolayer manner.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Mei Yan,Ru-Ling Tang,Wenlong Liu,Sheng-Ping Guo
Metal oxyhalides have attracted extensive attention as fascinating nonlinear optical (NLO) materials. Here, two barium niobium oxyfluorides, Ba3Nb2O2F12(H2O)2 (1) and Ba0.5NbO2F2(H2O) (2), have been obtained by regulating the O/F ratio in Nb–O–F units (NbOF6 pyramids to NbO4F2 octahedra). The overall NLO effect is improved from 1 to 2 with larger second-harmonic generation (SHG) intensities (0.9 to 1.7 × KH2PO4 (KDP)) and maintainable large band gaps (>3.0 eV) by regulating the O/F ratio in Nb–O–F units (1:6 to 4:2).
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Junyun Huang,Xiaofang Li,Mengjie Ma,Dinglong Li
Di-(2-ethylhexyl) phthalate (DEHP) is an annexing agent that is widely used in the plastics industry. Due to the endocrine-disrupting effect of this compound, the development of an efficient method for degrading DEHP is important. In this study, DEHP was degraded by UV-activated peroxymonosulfate (PMS) oxidation. The influences of various parameters, including PMS dose, temperature, pH, metal ions, common anions and humic acid (HA), were examined. An increase in PMS dose and the presence of metal ions and common anions was observed to accelerate the reaction, while high pH and the presence of HA inhibited the reaction. In addition, seven transformation products were identified by liquid chromatography time-of-flight mass spectrometry (LC-TOF-MS), from which the reaction mechanism and degradation pathways were tentatively proposed. Direct oxidation, hydroxylation, cleavage of the ester bond and decarboxylation were observed in the degradation process. These findings may provide useful information for the treatment of this pollutant.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2022
·Vol. 20
·期 7
·1510-1517
·
IF 3.89
Yang Liu,Meng Cao,Shangxi Zhang,Zhenxi Wang,Xin Dai,Xinde Jiang,Yucheng Dong,Jie Fu
A Brønsted acid catalyzed method for the construction of guaiazulenyl C3-functionalized indole derivatives is reported for the first time. The reactions proceeded smoothly at ambient temperature by using (±)-10-camphorsulfonic acid (CSA) as a catalyst, 2-indolylmethanols and guaiazulene as substrates, and the desired products were obtained in high yields with excellent regioselectivities.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2015
·
IF 4.152
Zhenzhen Liu,Yong Tang,Ting Kang,Minyu Rao,Kejia Li,Qin Wang,Changyun Quan,Chao Zhang,Qing Jiang,Huiyong Shen
HA and bone morphogenetic protein-2 (BMP-2) possess superior osteoinductive and osteoconductive activities in the repair of bone defects. In this study, a BMP-2 mimicking oligopeptide (serine–serine–valine–proline–threonine, SSVPT) was introduced to the surface of nano-sized HA as the reinforcement phase of a poly(methyl methacrylate) (PMMA) cement, and the synergistic action of HA and oligopeptide on the bioactivity of HA/PMMA bone cement was investigated. Incorporated with 3-trimethoxysilyl propyl methacrylate (MPS)-modified HA, the compressive strength, flexural strength, and flexural modulus of HA/PMMA complied with the international standardization organization 5833 standard. Adherence measurement demonstrated that the introduction of HA and SSVPT could promote the adhesion and proliferation of human fetal osteoblast (hFOB) on the surface of HA/PMMA cement. The increased alkaline phosphatase (ALP) activity indicated that HA/PMMA could promote osteogenic differentiation of hFOB. All of the results illuminated that the HA/PMMA cement could be used as a bioactive material for regeneration and reconstruction of load-bearing bone.
研究领域:
材料科学
·
骨科医学
✓ 已验证
DOI
PubMed
高影响因子
One Health Advances
·
2026
·Vol. 4
·期 1
·32
·
IF 5
Ni Baihai,Du Jiayu,Li Zimeng,Jian Pingan,Chen Mingshan,Li Jinlong,Li Xuenan
One common plasticizer is di(2-ethylhexyl) phthalate (DEHP). We use it a lot in our daily lives, and prolonged exposure to it can be harmful to living things. One form of selective autophagy that can break down damaged lysosomes is called lysophagy. Conversely, excessive occurrence of lysophagy can in turn cause lysosomal damage. Here, we show that DEHP stimulates the transient receptor potential mucoLipin 1-transcription factor EB (TRPML1-TFEB) pathway, drives excessive lysophagy, resulting in lysosomal dysfunction and kidney injury in mice. One carotenoid with strong antioxidant qualities is lycopene (LYC). It is frequently employed to offset the effects of DEHP. Interestingly, our results showed that LYC can reduce kidney damage caused by DEHP in mice. Inhibiting the TRPML1-TFEB pathway's activation and reducing lysophagy are two of the mechanisms of action. In summary, LYC significantly alleviates DEHP-induced injury in mouse renal tubular epithelial cells by inhibiting TRPML1-TFEB pathway-mediated lysophagy. LYC successfully reduced the damage caused by mono(2-ethylhexyl) phthalate in human renal proximal tubular epithelial cells, confirming this effect in vitro. This study establishes a critical link between LYC treatment and lysophagy as well as lysosomal dysfunction in DEHP-induced mouse renal tubular epithelial cells. This study offers novel mechanistic perspectives on DEHP-induced nephrotoxicity and the renal protection conferred by LYC. Graphical
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Yingmin Yu,Xiaocheng Zhang,Lingxiao Yi,Min Li,Fangyu Zhang,Jiajun Wei
Liquid–liquid equilibrium (LLE) data of ternary systems {2-ethyl-1-hexanol + ethylene glycol + water/n-heptane} were measured at 298.2, 308.2, and 318.2 K under 101.3 kPa. The distribution coefficient (D) and selectivity coefficient (S) of the systems were calculated to analyze the extraction ability of the two extractants that separate 2-ethyl-1-hexanol and ethylene glycol. Meanwhile, the NRTL and UNIQUAC activity coefficient models were used to correlate the experimental data and the different model parameters were obtained by data regression. The root-mean-square deviation (RMSD) between the calculated and experimental values was less than 0.96%, indicating that both models have a reasonable correlation with the experimental data of the ternary system and can accurately predict the experimental data. GUI-MATLAB has validated the binary interaction parameters.
研究领域:
化学工程
·
热力学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）