@article { author = {Baghernejad, Bita and Samaie, Reyhaneh}, title = {Nano CeO2 as a new green and recyclable catalyst for the synthesis of 2-aryl Benzoxazole}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {255-262}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.1}, abstract = {2-Aryl benzoxazole derivatives have been reported to have a wide range of biological and pharmacological activities. Some of these derivatives have anticoagulant, antispasmodic, diuretic, anti-cancer and anti-anaphylactin properties. In this research, a simple method for the synthesis of high-efficiency 2-aryl benzoxazole through the reaction of aminophenols and aldehyde derivatives under solvent-free conditions in the presence of a catalytic amount of nano-CeO2 is presented. The results revealed that this synthetic reaction is very simple and benzoxazole derivatives produced with good yields compared to other studies. Mild conditions, high speed and short reaction time, simplicity of product separation process, high efficiency and purity of synthesized derivatives are the advantages of the proposed method. As shown in Table 5, the highest efficiency (95%) in a short time (15 min) was obtained in this study, which is very important compared to other previous methods presented.}, keywords = {Nano,CeO2 O,aminophenols Aldehydes 2,Arylbenzoxazole}, url = {https://www.ajnanomat.com/article_132310.html}, eprint = {https://www.ajnanomat.com/article_132310_42863a385b14df1f3311689c8432b4d1.pdf} } @article { author = {Moradiya, Meet A. and Khiriya, Pradeep and Khare, Purnima Swarup}, title = {Green synthesis of CoFe2O4 ferrofluid: Investigation of structural, magnetic and rheological behaviour}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {263-273}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.2}, abstract = {In this work, we report the green synthesis of cobalt ferrite (CoFe2O4) nanoparticles Ferrofluid by a modified co-precipitation method using Glycyrrhiza glabra (Licorice) roots as a surfactant, which is eco-friendly, non-toxic, and inexpensive. X-Ray diffraction (XRD) analysis confirmed the purity of the spinel CoFe2O4 structure. The average crystallite size, strain and lattice constant were 5 nm, 0.01, and 8.39 Ao, respectively. Fourier transform infrared spectrum (FTIR) results demonstrated an absorption band at a wavenumber of 574 cm-1, indicating the presence of cobalt ferrite nanoparticles. transmission electron microscopy (TEM) images showed that the sample contains well-dispersed and spherical nanoparticles with an average particle size of 12.6 nm. The magnetic properties of the fluid are confirmed from the (M-H) hysteresis curve. The hysteresis curve revealed the ferromagnetic nature of the particles, and the saturation magnetization (MS) is 56.6 emu/g. The rheological properties were studied with a variable magnetic field rheometer. The results showed that the rheological measurements comply with the structural and magnetic properties of the CFO FF by a green modified co-precipitation synthesis G. glabra, which can be used for various medical applications.}, keywords = {Green synthesis,Cobalt ferrite,ferrofluid,Rheology,Magnetization}, url = {https://www.ajnanomat.com/article_134104.html}, eprint = {https://www.ajnanomat.com/article_134104_d31c11ff3ce3dc02a918508311a05c6d.pdf} } @article { author = {Bashandeh, Zahra and Dehno Khalaji, Aliakbar}, title = {An efficient removal of methyl green dye by adsorption onto new modified chitosan Schiff base}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {274-281}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.3}, abstract = {New modified chitosan Schiff base (EP-CS-SB) composite was prepared from the reaction of chitosan, epichlorohydrin and trans-cinnamaldehyde (molar ratio 1:1:1) and characterized by Fourier-transform infrared spectroscopy (FT-IR), ultraviolet–visible spectroscopy (UV-Vis), thermogravimetry and differential thermal analysis (TG-DTA), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis. It was applied as a new adsorbent for removal of methyl green (MG) dye. The effects of different significant parameters, such as pH solution (2-10), adsorbent dosage (0.005, 0.01 and 0.02 g) and contact time (0 – 120 min) were explored. Results show that the adsorption process was depended on pH solution. The highest adsorption capacity of EP-CS-SB was obtained 98.47% at pH =8, 120 min, and 0.02 g of EP-CS-SB. EP-CS-SB was found to be a suitable candidate for removal of cationic dye.}, keywords = {Epichlorohydrin,Cinnamaldehyde,Chitosan Schiff base,Methyl green removal}, url = {https://www.ajnanomat.com/article_135684.html}, eprint = {https://www.ajnanomat.com/article_135684_6921b14b4ba386abec34a2b63ba1d6fd.pdf} } @article { author = {Dianat, Manije and Zare, Abdolkarim and Hosainpour, Monavvar}, title = {Efficient protocol for the production of pyrimido[4,5-b] quinolines using an organic-inorganic hybrid catalyst}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {282-289}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.4}, abstract = {In this work, an efficient protocol for the synthesis of pyrimido[4,5-b]quinolines was reported. The one-pot multi-component reaction of arylaldehydes, barbituric acid (or 2-thiobarbituric acid) and anilines in the presence of an organic-inorganic hybrid material namely tetramethyl-N-(silica-n-propyl)-N′-sulfonic acid-ethylenediaminium chloride/mesylate ([TSSECM]) afforded the mentioned compounds. This protocol has several advantages including, high yields (86-95%), relatively short reaction times (110-120 min), recyclability of the catalyst and easy purification of the products without column chromatography.}, keywords = {Pyrimido[4,5-b]quinoline,Organic-inorganic hybrid catalyst N,N,N′,N′-Tetramethyl-N-(silica-n-propyl)-N′-sulfonic acid-ethylenediaminium chloride/mesylate ([TSSECM]) Multi-component reaction}, url = {https://www.ajnanomat.com/article_136239.html}, eprint = {https://www.ajnanomat.com/article_136239_670d7eac88dc96b322fcb78819d4c38d.pdf} } @article { author = {Naderi, Marzieh and Kouchakzadeh, Ghazaleh}, title = {The ability of Tragopogon graminivorous DC edible medicinal plant for optimum synthesis of zinc oxide green nanoparticles and evaluation of antibacterial properties of its extract and nanoparticles}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {290-308}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.5}, abstract = {In recent years, the green synthesis of nanoparticles has become an environment-friendly method developed significantly. In this method, plant extract as a reductive and stabilizing agent plays a key role in the synthesis of nanoparticles. In this study, the optimum conditions for the green synthesis of ZnO nanoparticles are investigated using the extract of Tragopogon graminivorous DC edible-medicinal plants. Also, the antioxidant effect of the plant extract and antibacterial properties of nanoparticles and extract are evaluated. After preparation of the aqueous extract, its antioxidant properties were evaluated by the DPPH method. Then, parameters such as pH, zinc acetate dihydrate concentration, the volume of plant extract, temperature, and time were optimized. The green nanoparticles were characterized by UV-Vis, FT-IR, X-ray diffraction, and scanning electron microscope techniques. Finally, antibacterial properties of extract and biosynthesized ZnO nanoparticles were investigated. The results of the DPPH method showed that plant extract can be used as a reductive agent. Overall, it can be said that the presence of various chemical compounds that have caused the antioxidant properties of plant extract demonstrate the ability of the extract as a source of natural antioxidants. Also, plant extract and nanoparticles can be regarded as antibacterial agents.}, keywords = {Tragopogon graminifolius DC Edible,medicinal plant Zinc oxide nanoparticles Antibacterial properties Optimal conditions}, url = {https://www.ajnanomat.com/article_137450.html}, eprint = {https://www.ajnanomat.com/article_137450_0a6d55ea28a8c7da3401ad498e3f33d3.pdf} } @article { author = {Manasa, M.V. and Devi, G. Sarala}, title = {Synthesis, structural evaluation of molybdenum oxide (MoO3) nanoparticles and its application as CO2 gas sensor}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {309-320}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.6}, abstract = {In the present study we report a simple eco-friendly hydrothermal protocol for the synthesis of molybdenum oxide (MoO3) nanoparticles at various temperatures i.e., 80-200 °C at intervals of 20 °C designated as S1-S6 sequentially with time duration of 4 h for each batch. The synthesized samples were characterized by X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), Fourier Transform Infra-red (FTIR), UV- Visible Diffuse Reflectance (UV-Vis DRS), Laser Raman, Cyclic Voltammetry (CV), X-Ray Photoelectron Spectroscopy (XPS) and Transmission Electron Microscopy (TEM) to find out their elemental composition, structure, morphology and the optical band gap. The XRD analysis indicates well-crystallized orthorhombic structure with preferred orientation along (210) plane. The presence of O-Mo-O stretching vibration was observed by FTIR analysis The gas sensing studies were carried out to examine the material’s Sensitivity over a temperature range of 50oC to 400oC for various gas concentrations i.e. 200-1000 ppm of CO2 gas. The sensor had a Sensitivity of S=68.5% for S4 sample at an optimum temperature of 200 °C. The adsorption of desired gas on the material correlated well with the particle size of material at different temperature. The response and recovery times were 50 s and 40 s respectively.}, keywords = {MoO3 Nanoparticles,Hydrothermal protocol,XRD,XPS,TEM}, url = {https://www.ajnanomat.com/article_137598.html}, eprint = {https://www.ajnanomat.com/article_137598_12b16f8fc0847e79c4f69950d954d767.pdf} } @article { author = {Patel, Kisan and Chandankar, Sachin and Mahajan, Hitendra}, title = {Synthesis and characterization of curcumin nanoparticles by hydrothermal method}, journal = {Asian Journal of Nanoscience and Materials}, volume = {4}, number = {4}, pages = {321-330}, year = {2021}, publisher = {Sami Publishing Company}, issn = {2645-775X}, eissn = {2588-669X}, doi = {10.26655/AJNANOMAT.2021.4.7}, abstract = {Curcumin (CRM) is a phytochemical that has potent antiproliferative effects against a variety of tumors in vitro. Curcumin, however, is limited in its clinical utility due to its poor solubility. Hydrothermal synthesis is a novel method that yields nanoparticles with narrow particle size distribution and high purity without further treatment the use of toxic solvents. Nanosized CRM with the average particle size of 186.2 nm was prepared by a simple hydrothermal process to enhance the aqueous solubility of CRM. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analysis identifies that the particles are highly crystalline and revealed no polymorphic changes in CRM on hydrothermal treatment and scanning electron microscopy (SEM) identified that the CRM nano agglomerates. Zeta potential (ZP) results demonstrated the relative stability of nanosized CRM after hydrothermal treatment. Nanosized CRM particles exhibited greater solubility and hence dissolution rate as compared to the original drug. The present study offers a simple process that lacks the use of organic solvent, therefore, is green, and had good yield being a single-step process, to synthesize and to design nanosized CRM for better drug delivery applications.}, keywords = {Nanoparticles,Hydrothermal,curcumin,Solubility}, url = {https://www.ajnanomat.com/article_139267.html}, eprint = {https://www.ajnanomat.com/article_139267_4cf61ddc4fcb473dd31ad9fe9209104a.pdf} }