In this study, we synthesized core-shell structured magnetic CdxZn1-xS@Fe3S4 semiconductor catalysts. The CdxZn1-xS shell of the catalysts possesses a wider absorption optical domain and uses light energy more efficie...
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In this study, we synthesized core-shell structured magnetic CdxZn1-xS@Fe3S4 semiconductor catalysts. The CdxZn1-xS shell of the catalysts possesses a wider absorption optical domain and uses light energy more efficiently than CdS. The Fe atoms of the Fe3S4 core dope into the CdxZn1-xS crystal lattice, which leads to a band gap decrease. Among all catalysts prepared, the Cd0.2Zn0.8S@Fe3S4 nanocomposites bear low band gap properties and can efficiently photocatalyze the degradation of methylene blue under the irradiation of simulated sunlight. Under an external magnetic field, the CdxZn1-xS@Fe3S4 catalysts can be recovered and reused several times without loss of catalytic activity. (C) 2017 Elsevier B.V. All rights reserved.
The effect of wastewater particles on catalytic ozonation during the treatment of petrochemical secondary effluent (PSE) was investigated. The dissolved organic carbon (DOC) removal results indicated that wastewater p...
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The effect of wastewater particles on catalytic ozonation during the treatment of petrochemical secondary effluent (PSE) was investigated. The dissolved organic carbon (DOC) removal results indicated that wastewater particles could significantly affect the catalytic oxidation reaction and increase ozone (O-3) consumption. When the suspended solids (SS) was filtered by the 0.45 mu m membrane, the O-3 dosage to DOC removal ratio was 1.99 mg(O3) mg(DOC)(-1), while it increased to 2.99 mg(O3) mg(DOC)-1 when the SS concentration was 50 +/- 1.57 mg L-1. Wastewater particles can react with O-3, thus reducing the O-3 and hydroxyl radicals (% OH) available for DOC removal. When the SS concentration was 30 +/- 0.96 mg L-1, O-3 dosages lower than 10 mg L-1 did not induce a change in the size and surface characteristics of the particles. Following the increase in the O-3 dosage to 36 mg L-1, extracellular polymeric substances (EPS) reacted with O-3/(center dot) OH with different characteristics. Dissolved organic matter (DOM) had the highest depletion reaction rate, followed by the loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS). The average reaction rates of the three constituents were 1.44, 0.212, and 0.079 mg L-1 min(-1), respectively. In addition, the results showed that eliminating wastewater particles would be beneficial for the removal of organic micro-pollutants (OMPs) by catalytic ozonation.
Phenol-formaldehyde resin was synthesized and modified by alumina nanoparticles (ANPs). The crystal form of the ANPs was characterized by X-ray diffraction (XRD), and differential scanning calorimetry (DSC) was used f...
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Phenol-formaldehyde resin was synthesized and modified by alumina nanoparticles (ANPs). The crystal form of the ANPs was characterized by X-ray diffraction (XRD), and differential scanning calorimetry (DSC) was used for thermal analysis of the resin. In addition, the resin was applied in plywood manufacture, and the curing time as well as the bonding strength was measured. The results showed, with an appropriate doping amount of ANPs, both the curing rate and the bonding strength increased significantly. The modified resin showed extensive application prospects in the wood construction industry.
Objectives To provide a comprehensive study of the intervention mechanism and compatible regularity of Chaihu Shu Gan San (CSGS) in a chronic unpredictable mild stress (CUMS)-induced depression model. Methods Ethologi...
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Objectives To provide a comprehensive study of the intervention mechanism and compatible regularity of Chaihu Shu Gan San (CSGS) in a chronic unpredictable mild stress (CUMS)-induced depression model. Methods Ethological study and ELISA assay were applied to measure the phenotypes of depression after CUMS stimulate and assess the antidepressant activity of fluoxetine, CSGS and its compatibilities. The serum metabolic profile changes were revealed by untargeted Q/TOF MS-based metabolomics followed by multivariate statistical analysis. Key findings CSGS exhibits an significant intervention effect on CUMS-induced depression. After the multivariate statistical analysis, 17 potential serum biomarkers were identified and 16 of them could be regulated by CSGS. The intervention of CSGS on CUMS-induced depression involved five key pathways. Moreover, each functional unit (monarch, minister, assistant and guide medicine) in CSGS regulates different metabolites and metabolic pathways to achieve different effects on antidepressant;however, their intervention efficacies are inferior to the holistic formula, which may be due to the synergism of bioactive ingredients in the seven herbs of CSGS. Conclusions CSGS produced an obvious antidepressant activity. The comprehensive and holistic metabolomics approach could be a powerful tool to study the intervention mechanism and the compatibility rule of traditional Chinese medicine.
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