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141.
Mahsa Fayazi 《Journal of Dispersion Science and Technology》2019,40(1):112-118
Two samples of nanostructured CuS were synthesized by two different methods, and were used for degradation of Bismarck Brown, as an azo dye. The first sample consists an assembly of nanosheets, and the second one has prolat-like spheroid structure. It is shown that CuS nanosheets have higher catalytic activity than the second sample for degradation of Bismarck Brown in the presence of H2O2. The catalytic activity of the CuS nanosheets was investigated by different variables such as reaction time, solution temperature, volume of H2O2, catalyst mass, dye concentration and presence of NaCl. CuS nanosheets have high degradation efficiency under mild conditions and in the dark medium. It was found that the rate of dye degradation by H2O2 is fast in the presence of CuS nanosheets, and most of the reactant molecules are degraded within 10?minute. As the main products of dye degradation by the CuS nanosheet, and in presence of H2O2 are CO2 and CO, it is a good catalyst for water purification. Another advantage of this catalyst is its reusability and recyclability, which maintains its stability after several cycles. Finally, the catalytic performance of CuS nanosheets was investigated for degradation of dye mixture (Bismarck Brown and Methyl violet). 相似文献
142.
Shafaati Mahsa Miralinaghi Mahsasadat Shirazi Reza Haji Seyed Mohammad Moniri Elham 《Research on Chemical Intermediates》2020,46(12):5231-5254
Research on Chemical Intermediates - The environmental pollution caused by the introduction of antibiotics into the water resources poses serious threats to aquatic organisms and human... 相似文献
143.
Kheirollahivash Mahsa Rashidi Fariborz Moshrefi Mohammad Mahdi 《Plasma Chemistry and Plasma Processing》2019,39(2):445-459
Plasma Chemistry and Plasma Processing - Hydrogen and solid carbon were produced through methane decomposition in a plasma reactor with a parallel set of screw type helix and rod-like electrodes.... 相似文献
144.
Magnetically recoverable lanthanum hydroxide as an efficient catalyst for Aerobic Oxidative Conversions of primary alcohols to the nitriles 下载免费PDF全文
Herein we report a novel magnetically recoverable lanthanum hydroxide nanoparticles for oxidative synthesis of nitriles directly from corresponding alcohols with ammonia as nitrogen source. The procedure for the preparation and characterization of La(OH)3/Fe3O4 magnetic nanoparticles were investigated and the scope and generality of the method was explored for a series of structurally diverse primary alcohols with electron‐donating and electron‐withdrawing groups. The best result was observed when 5 mol% of La with respect to the benzyl alcohol was used at reflux condition under O2 atmosphere. The La(OH)3/Fe3O4 magnetic nanoparticles could be easily isolated from the reaction mixture with an external magnet and reused at least 5 times without significant loss in activity. 相似文献
145.
Mahsa Kiani Mojtaba Bagherzadeh Soraya Meghdadi Farzaneh Fadaei-Tirani Kurt Schenk-Joß Navid Rabiee 《应用有机金属化学》2020,34(4):e5531
The complexes PdII(qcq)(OAc) and PtII(qcq)Cl have been synthesized using environmentally benign synthesized ligands and characterized by elemental analyses: Fourier transform infrared spectroscopy, UV–visible spectroscopy, 1H NMR spectroscopy, and X-ray diffraction. The catalytic activity of the complex was assessed, in different media, for the Mizoroki–Heck coupling reaction for typical aryl halides and terminal olefins under aerobic conditions. Since the base and the solvent were found to influence the efficiency of the reaction, reaction conditions, temperature, time, and the amount of K3PO4 and a mixture of H2O/PEG, were optimized. We found, for the Mizoroki–Heck reaction coupling less reactive aryl chloride derivatives with olefins, promising activity for palladium catalysts. The electrochemical behavior of Hqcq and the Pd(II) complex was investigated by cyclic voltammetry and irreversible PdII/I reductions were observed. Hqcq and the Pd(II) and Pt(II) complexes were also screened for their in vitro antibacterial activity. They showed promising antibacterial activity comparable to that of the antibiotic penicillin. 相似文献
146.
The compound 1,1′-(ethane,1,2-diyl)ditriphenylphosphonium hexamolybdate dimethylsulfoxide {C2H4[P(C6H5)3]2}{Mo6O19}·SO (CH3)2 ( I ) was prepared, and 1H-NMR, 13C-NMR, Fourier transform-infrared, differential scanning calorimetry and single crystal X-ray diffraction analysis were used to characterize the titled compound. Crystallographic data showed that compound I crystallized in the monoclinic crystal system in C2/c space group. The compound ( I ) was used for selective synthesis of 2,4,5-tri aryl imidazole derivatives under solvent-free conditions efficiently. Because of hindrance of the catalyst, the yields of products for aldehydes bearing para substituents are higher than the aldehydes bearing ortho substituents, and for aromatic aldehydes with meta substituents are very low. 相似文献
147.
Mariela Fernández Jesús E. García Ramin Gholizadeh Verónica A. González-López 《Mathematical Methods in the Applied Sciences》2020,43(13):7537-7549
In this paper, we propose a procedure of selecting samples from a set of samples coming from Markovian processes of finite order and finite alphabet. Under the assumption of the existence of a law that prevails in at least q% of the samples of the collection, we show that the procedure allows to identify samples governed by the predominant law. The approach is based on a local metric between samples, which tends to zero when we compare samples of identical law and tends to infinity when comparing samples with different laws. The local metric allows to define a criterion which takes arbitrarily large values when the previous assumption about the existence of a predominant law does not hold. By means of this procedure, we map similarities and dissimilarities of some Brazilian stocks' daily trading volume dynamic. 相似文献
148.
Yazdani Mahsa Tavakoli Omid Khoobi Mehdi Wu Yi Shuan Faramarzi Mohammad Ali Gholibegloo Elham Farkhondeh Shabnam 《Journal of inclusion phenomena and macrocyclic chemistry》2022,102(1-2):55-64
Journal of Inclusion Phenomena and Macrocyclic Chemistry - Beta-carotene (BC) is a vitamin A precursor and has potential anticancer benefits, but the delivery of BC is hindered by its low... 相似文献
149.
Ansari Mahsa Montazeri Mahbobeh Daryani Ahmad Farshadfar Kaveh Emami Saeed 《Molecular diversity》2020,24(4):1223-1234
Molecular Diversity - A new series of aryloxyacetophenone thiosemicarbazones 4a–q have been synthesized as anti-Toxoplasma gondii agents. All compounds showed significant inhibitory activity... 相似文献
150.
Shadlaghani Arash Farzaneh Mahsa Shahabadi Mohammad Tavakoli Mohammad Reza Safaei Mohammad Reza Mazinani Iman 《Journal of Thermal Analysis and Calorimetry》2019,135(2):1429-1442
Journal of Thermal Analysis and Calorimetry - In this paper, the effect of internal serrated fins and eccentricity on natural convection heat transfer between annular spaces with the equivalent... 相似文献