Showing papers by "Masoud Salavati-Niasari published in 2017"
TL;DR: In this article, a new and convenient synthetic method based on a reaction in an aqueous system was reported, which can produce a new nanocomposite superionic system (CdHgI4/HCgI2) at 70°C for 20min.
230 citations
15 Jul 2017
TL;DR: It is expected that the synthesis of the high surface area TiO2 nanowires, facile photodeposition of palladium into its texture, and simple conversion of GO to graphene during hydrothermal process without using strong reducing agents, could be a suitable rote for preparing different types of carbon based TiO 2 nanocomposite photocatalysts.
Abstract: In this study, at first, TiO2 nanowire was prepared by an alkaline hydrothermal process. In the following, Gr/Pd/TiO2-NPs and Gr/Pd/TiO2-NWs were synthesized by a combination of hydrothermal and photodeposition methods. The properties of as prepared products were characterized using XRD, FT-IR, SEM, DRS, TEM, ICP-OES, EDS and TGA analysis. SEM results confirmed nanodimension structure for all samples. Also the band gap values obtained using DRS technique suggests that all the samples have semiconductor behavior. Using TGA analysis, the amount of graphene loaded onto the powders was confirmed. Photocatalytic degradation of rhodamine B by TiO2-NWs, Gr/Pd/TiO2-NPs and Gr/Pd/TiO2-NWs nanocomposites was compared under ultraviolet light irradiation. Results confirmed that the Gr/Pd/TiO2-NWs composite show the highest photocatalytic activity due to much higher available surface area of TiO2 substrate in nanowire structure. It is expected that the synthesis of the high surface area TiO2 nanowires, facile photodeposition of palladium into its texture, and simple conversion of GO to graphene during hydrothermal process without using strong reducing agents, could be a suitable rote for preparing different types of carbon based TiO2 nanocomposite photocatalysts.
227 citations
TL;DR: In this paper, N-Doped Graphene Quantum Dots (N-GQDs)/Titanium Dioxide(TiO 2 ) as new Nanocomposite is designed and used for removal of methylene blue (MB) from water.
212 citations
TL;DR: In this paper, a new method for synthesis of Fe3O4@SiO2@TiO2/Ho magnetic core-shell nanoparticles with spherical morphology is proposed, and the crystal structures, morphology, and chemical properties of the as-synthesized nanoparticles were characterized using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM), energy dispersive X-ray (EDS), XRD), UV-ray diffraction (DRS), and vibrating sample magnetometer (
197 citations
TL;DR: In this article, the authors successfully prepare NiAl 2 O 4 /NiO nanocomposite with thermal decomposition method by using green tea extract (GTE) as precipitating agent.
171 citations
TL;DR: The in vitro release of beads exhibited significant behavior on the subject of nanoparticles concentration and alginate content and biocompatibility of the CFO nanoparticles and MCFO/Alg beads are demonstrated through cytotoxicity test via MTT assay on U87 cell lines.
163 citations
TL;DR: Results indicated that this matter can promote interfacial interactions between the sponge surface and oil and has the 30 times recyclability and the advantage of magnetic separation.
163 citations
01 Jul 2017
TL;DR: It was found that changing these synthesis factors has great role in controlling size and shape of Dy2Sn2O7-SnO2 nanocomposites.
Abstract: Dy 2 Sn 2 O 7 -SnO 2 nanocomposites were synthesized through a facile way utilizing propane-1,2-diol as novel polymerization agent and trimesic acid as new stabilization agent. Effects of different polymerization agents, calcination temperature and various stabilization agents on the size and shape of the Dy 2 Sn 2 O 7 -SnO 2 nanocomposites were investigated. It was found that changing these synthesis factors has great role in controlling size and shape of Dy 2 Sn 2 O 7 -SnO 2 nanocomposites. The as-produced Dy 2 Sn 2 O 7 -SnO 2 nanostructures were analyzed using FT-IR, HRTEM, DR-UV–vis, EDS, XRD, and FESEM. This is the first attempt on the investigation of photocatalytic behavior of nanostructured Dy 2 Sn 2 O 7 -SnO 2 . The influences of Dy 2 Sn 2 O 7 -SnO 2 amount and type of illumination light on the photocatalytic behavior of the nanocrystalline Dy 2 Sn 2 O 7 -SnO 2 were also investigated. The ability for the decomposition of the water pollutants including eosin Y, eriochrome black T, erythrosine and methyl orange were studied through photocatalytic experiments.
162 citations
TL;DR: In this article, a Co3O4/ZnO nanocomposite is applied for removal of methylene blue (MB) and Rhodamine B (RB) dyes from water.
160 citations
TL;DR: The paper explores the possibility of coupling vanadium pantaoxide into iron vanadate that improves optical properties and photocatalytic activity and prepares FeVO4/V2O5 nanocomposite via in-situ ultrasound-assisted procedure by using NH4F in one step.
160 citations
TL;DR: In this paper, a novel technique of preparing Zn2GeO4 nanostructures has been developed by using chemical precipitation method of GeCl4 as a Ge precursor and acacen as a capping agent.
TL;DR: In this article, a self-propagating sol-gel process was used to synthesize cobalt ferrite-silica nanocomposites for the removal of malachite green dye from water through CoFe 2 O 4 SiO 2.
TL;DR: In this paper, a simple and scalable procedure for efficient reduction of graphite oxide in solid phase, mild temperature reaction and ambient atmosphere was introduced, where urea was used as expansion-reduction agent and well mixed with graphite oxides.
TL;DR: In this paper, the authors used GQDs as photoluminescence sensor for detecting Staphylococcus aureus and E. coli in the range of 0 to 9 × 10 7.
TL;DR: GQDs have been synthesized by using a novel and green precursor (corn powder), and GQDs/TiO 2 composite has been prepared by using graphene quantum dots as capping agent.
TL;DR: A facile precipitation method with the subsequent thermal treatment has been developed for the synthesis of Zn 2 SnO 4 nanostructures in presence of tetraethylenepentamine (TEPA) with long chain as a capping and basic agent.
TL;DR: Results of the morphological investigation of the as-synthesized products illustrate that the shape and size of the copper chromite depended on the surfactant sort, reaction duration and temperature.
Abstract: Highly photocatalytically active copper chromite nanostructured material were prepared via a novel simple hydrothermal reaction between [Cu(en)2(H2O)2]Cl2 and [Cr(en)3]Cl3.3H2O at low temperature, without adding any pH regulator or external capping agent. The as-synthesized nanostructured copper chromite was analyzed by transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy, energy dispersive X-ray microanalysis (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. Results of the morphological investigation of the as-synthesized products illustrate that the shape and size of the copper chromite depended on the surfactant sort, reaction duration and temperature. Moreover, the photocatalytic behavior of as-obtained copper chromite was evaluated by photodegradation of acid blue 92 (anionic dye) as water pollutant.
TL;DR: In this article, a new facile hydrothermal reaction between Ho(NO 3 ) 3 ⋅6H 2 O and tetraethylenepentamine (tepa) as novel precipitator in presence of bis-(2-hydroxy-1-naphthaldehyde)-o-phenylenediamine Schiff base compound as new capping agent.
TL;DR: In this article, a simple hydrothermal approach was used to synthesize silver zinc tetraiodide/silver iodide (Ag 2 ZnI 4 /AgI) nanocomposites.
TL;DR: In this paper, the synthesis and characterization of TlCdI 3 nanostructures through a new mechanical mixture of the reactants method for the first time was focused on the synthesis.
TL;DR: In this article, magnetically Fe 3 O 4 /SiO 2 /hydroxyapatite was synthesized and modified with 3-aminopropyl triethoxysilane (APTES) using fructose as a green capping agent.
TL;DR: Nd2Zr2O7-ZrO2 nanocomposites were prepared via a facile process with propylene glycol as novel connecting agent and benzene tricarboxylic acid as a new complexing agent.
TL;DR: In this article, the performance of the nanostructured praseodymium zirconate (Pr 2 Zr 2 O 7 ) was investigated in various conditions.
TL;DR: The effect of various parameters such as the type of copper sources, temperature and time of reaction on the morphology and the particles size were studied in this article, where pure CuO-CeO2 nanocomposites were synthesized by simple thermal decomposition method in presence of various Cu salts as a copper source and fructose as a green capping agent.
TL;DR: In this paper, a glassy carbon electrode modified with CoFe2O4/SiO2 spinel-type nanocomposites was used for the determination of L-cysteine.
Abstract: Magnetic CoFe2O4/SiO2 spinel-type nanocomposites have been fabricated by a sol-gel method in the presence of various acids. Their structural, morphological and magnetic properties were characterized by XRD, SEM, TEM, FTIR, VSM and EDX which revealed that they are formed in the presence of all precursors. TEM analysis indicates homogeneous and porous spherical morphology with nanosize grains 10–20 nm in diameter in the presence of salicylic acid. Electrochemical sensor application of nanocrystalline CoFe2O4/SiO2 synthesized by salicylic acid for determination of L-cysteine was investigated using differential pulse voltammetry (DPV) and cyclic voltammetry (CV). DPV indicates that the sensor shows remarkable sensitivity for the determination of L-Cys. The response of a glassy carbon electrode modified with CoFe2O4/SiO2 is linear in the 0.02–425 μM L-Cys concentration range, with a 0.20 μM detection limit (at an S/N ratio of 3). The electrode produces a negligible current response for tryptophan, glutamic acid and citric acid at the working potential applied (+0.748 V vs Ag/AgCl). The electrode is reliable, simple, rapidly prepared, precise, and the method does not require extensive sample treatment.
TL;DR: Nd2Sn2O7 (neodymium stannate) nanostructures were successfully produced through an improved Pechini process in this paper, where several organic acids as stabilization agent and capping agent, different pH control agents and propane-1,2-diol as esterification agent have been applied to produce Nd2sn2O 7 nanostructure.
TL;DR: In this work, highly photocatalytically active Ho2O3-SiO2 nanocomposites have been designed and applied for decomposition of methylene blue pollutant and it was observed that SiO2 has notable impact on catalytic activity of holmium oxide photocatalyst for destruction.
TL;DR: PbFe12O19 nanocomposites were successfully synthesized by sol-gel auto-combustion route by employing valine as reducing agent and graphene and CNT as matrix.
TL;DR: In this article, a novel approach in the simultaneous deposition of hole-transporting and contact layers is introduced, where interface engineering is conducted in order to grow CuI as a holetransporting material at the interface of Cu contact and perovskite layer through which great reproducibility and durability are achieved.
Abstract: Low-cost fabrication of perovskite solar cells while fusing large-area deposition potential along with high power conversion efficiency and durability paves the way for scaling up the perovskite solar cells. In this work, a novel approach in the simultaneous deposition of hole-transporting and contact layers is introduced. The interface engineering is conducted in order to grow CuI as a hole-transporting material at the interface of Cu contact and perovskite layer through which great reproducibility and durability are achieved. The prepared devices show 9.24% and 8.3% power conversion efficiencies for 0.1 and 1 cm2 active areas, respectively.
TL;DR: In this article, a modified Pechini approach utilizing succinic acid as novel stabilization agent and propane-1,2-diol as new cross-linking agent in presence of tetraethylenepentamine as novel pH regulator and co-capping agent was successfully prepared.