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In this study, Ag3PO4/TiO2@molecular sieve (MS) ternary composites were fabricated via in-situ deposition and hydrothermal growth method for photocatalytic degradation of formaldehyde and sodium isobutyl xanthate (SIBX) under visible light irradiation. NSC 663284 price XRD, PL, UV-vis, UPS, SEM-EDS and XPS techniques were adopted to characterize the composite. The results show that the MS material was indexed as zeolite P and Ag3PO4-TiO2 hybrid structure could improve the absorption of visible light and greatly inhibit the recombination of photogenerated charge carriers by introducing 3 times TiO2. After evaluating the photocatalytic activity and kinetics model, it is found that photocatalytic activity is consistent with the apparent first-order kinetic model. The Ag3PO4/TiO2-3@MS ternary composite under visible light irradiation appears the highest removal rate with 97.9% of formaldehyde and 96.7% of SIBX, respectively. Furthermore, the reusability of the photocatalyst was investigated by successive reuse. After five reuses, the removal rates reached 97.3% and 94.6% within 105 min for formaldehyde and SIBX, respectively. At last, the proposed mechanism of the photocatalytic reaction and the degradation routes of formaldehyde and SIBX were systematically discussed.
Stent retriever thrombectomy has been regarded as the standard treatment for acute intracranial large artery occlusion. As fast recanalization is the most important factor for favorable outcomes in patients with stroke, defining the etiology is important for the treatment of acute large vessel occlusion. We aimed to investigate whether full-length stent visibility during thrombectomy could provide information on the stroke etiology or the clot characteristics using the stent strut deformity during thrombectomy.
Intra-arterial thrombectomy was performed on 46 patients with Trevo stent as the first endovascular thrombectomy device. Patients were assigned to the full expansion group or the stent deformity group based on the shape of the stent strut during the endovascular procedure. The presence of stent deformity during the procedure, underlying intracranial atherosclerotic stenosis (ICAS), and residual stenosis at the occlusion site on the final conventional angiography, follow-up magnetic resonance angiography, or computed tomography angiography were retrospectively assessed.
Recanalization without underlying arterial stenosis at the occlusion site was observed in 92.9 % (26/28 patients) and 50.0 % (8/16 patients) of the full expansion and stent deformity groups (p = 0.002), respectively. A significantly lower proportion of patients in the full expansion group demonstrated ICAS-related occlusion compared with that in the stent deformity group (3.6 % vs. 43.8 %, respectively; p = 0.002).
The degree of stent expansion during thrombectomy in acute large artery occlusion can be a useful predictor of the stroke etiology and potentially helpful to the operator for endovascular treatment planning.
The degree of stent expansion during thrombectomy in acute large artery occlusion can be a useful predictor of the stroke etiology and potentially helpful to the operator for endovascular treatment planning.
According to immunological theory of schizophrenia, dysfunctions of the immune system are linked with the pathology of schizophrenia. Among cytokines, tumor necrosis factor alpha (TNF-α) and interleukin 6 (IL-6) seem to be correlated with psychopathology of schizophrenia. Both IL-6 and TNF-α are produced in the fat tissue by adipocytes. Thus, cytokine levels in obese patients are increased compared with healthy subjects. These metabolic underlying mechanisms may be an important confounding factor in the studies on cytokines levels in schizophrenia. The aim of this study was to evaluate how metabolic alterations affect peripheral IL-6 and TNF-α levels in schizophrenia patients.
This was a case-control study, 30 schizophrenia patients were recruited in the study group and 30 healthy subjects were matched by sex and age. Serum levels of TNF-α and Il-6 were measured using ELISA test, together with detailed anthropometric, laboratory and body composition parameters (determined using bioelectric impedance analyng/mL and in the control group 1.39 ± 1.39 ng/mL. Again, the difference was not significant (p = .51). We have analysed the relationship between anthropometric and metabolic variables and serum IL-6 and TNF-α concentrations. In conclusion, TNF-α was more sensitive to metabolic alterations compared with IL-6. This observation may be beneficial for further research on immune system in schizophrenia, indicating that studies of IL-6 and TNF-α should be controlled at least for major metabolic parameters (BMI, WHR).In recent years, Fe-based catalysts for the selective catalytic reduction of NO with NH3 (NH3-SCR) have been attracting more attention. In this work, a novel Fe-Sb binary metal oxide catalyst was synthesized using the ethylene glycol assisted co-precipitation method and was characterized using a series of techniques. It was found that the catalyst with a molar ratio of 73 (FeSb) displayed the best NH3-SCR activity with 100% conversion of NOx (nitrogen oxides) over a wide temperature window and with good resistance to H2O + SO2 at 250 °C. The X-ray photoelectron spectroscopy (XPS) and in situ diffused reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) of NOx adsorption results suggested that strong electron interactions between Fe and Sb in Fe-O-Sb species existed and electrons of Sb could be transferred to Fe through the 2Fe3+ + Sb3+ ↔ 2Fe2+ + Sb5+ redox cycle. The introduction of Sb significantly improved the adsorption behaviour of NOx species on the Fe0.7Sb0.3Ox surface, which benefitted the adsorption/transformation of NOx, thereby facilitating the NH3-SCR reaction. In addition, the Fe0.7Sb0.3Ox catalyst demonstrated a good tolerance of H2O and SO2, since the decomposition of NH4HSO4 on the catalyst surface was promoted by the introduction of Sb.
Cellulose-based aerogel, due to its rich reserves, environmental friendliness and porous structure, is considered as a new type of adsorbents for treating oil and water pollution. However, the functionalization of cellulose aerogel is still required for the efficient increase of its adsorption performance in wide applications. The combination of nanomaterials could significantly improve the adsorption capability of nanocellulose aerogel.
In this work, nanocomposite aerogels comprising of nanocellulose and nanoalumina (NC/Al
O
) are produced via a solvent-free method and the effect of weight ratios between nanocellulose and nanoalumina on the adsorption properties of NC/Al
O
aerogels has been studied.
The results reveal that the NC/Al
O
aerogel with a low density of 5.1mgcm
could obtain the optimal pore microstructures and the highest oil and organic solvent adsorption capacities with the preparation condition under the nanocellulose/nanoalumina weight ratio of 10.25 and 0.4wt% of nanocellulose in aqueous solution.
Website: https://www.selleckchem.com/products/nsc-663284.html
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