Controllable synthesis of Au nanocrystals with systematic shape evolution from an octahedron to a truncated ditetragonal prism and rhombic dodecahedron

CrystEngComm ◽  
2019 ◽  
Vol 21 (37) ◽  
pp. 5602-5609 ◽  
Author(s):  
Yazhou Qin ◽  
Yuxiang Lu ◽  
Dongdong Yu ◽  
Jianguang Zhou
Keyword(s):  
Synthesis Method ◽  
Polyol Synthesis ◽  
Shape Evolution ◽  
Controllable Synthesis ◽  
Rhombic Dodecahedron ◽  
Stepwise Evolution

Stepwise evolution of Au nanocrystals from an octahedron to a truncated ditetragonal prism and rhombic dodecahedron was achieved by the polyol synthesis method.

Structural, Morphological, Magnetic and Self-Heating Studies of One-Step Polyol Synthesized Manganese Ferrite (MnFe2O4) Nanoparticles

2019 ◽  
Vol 19 (01) ◽  
pp. 1950003
Author(s):  
P. R. Ghutepatil ◽  
S. H. Pawar
Keyword(s):  
Room Temperature ◽  
Synthesis Method ◽  
Average Crystallite Size ◽  
Superparamagnetic Nanoparticles ◽  
Polyol Synthesis ◽  
X Ray Diffraction ◽  
Self Heating ◽  
Transmission Electron ◽  
One Step ◽  
Mnfe2o4 Nanoparticles

In this paper, uniform and superparamagnetic nanoparticles have been prepared using one-step polyol synthesis method. Structural, morphological and magnetic properties of obtained MnFe2O4 nanoparticles have been investigated by using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and thermogravimetric analysis (TGA) techniques. Structural investigation showed that the average crystallite size of obtained nanoparticles was about 10[Formula: see text]nm. Magnetic study revealed that the nanoparticles were superparamagnetic at room temperature with magnetization 67[Formula: see text]emu/g at room temperature. The self-heating characteristics of synthesized MnFe2O4 nanoparticles were studied by applying external AC magnetic field of 167.6 to 335.2[Formula: see text]Oe at a fixed frequency of 265[Formula: see text]kHz. The SAR values of MnFe2O4 nanoparticles were calculated for 2, 5, 10[Formula: see text]mg[Formula: see text]mL[Formula: see text] concentrations and it is observed that the threshold hyperthermia temperature is achieved for all concentrations.

CeO2 Nanocrystal Decorated TiO2 Nanobelt with Enhanced Photocatalytic Performance

2021 ◽  
Vol 21 (4) ◽  
pp. 2647-2652
Author(s):  
Yanchen Ji ◽  
Guoxin Song ◽  
Ruiqi Yang ◽  
Longhua Ding ◽  
Aizhu Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Water Treatment ◽  
Light Absorption ◽  
High Performance ◽  
Photocatalytic Performance ◽  
Synthesis Method ◽  
Charge Carriers ◽  
Controllable Synthesis ◽  
Visible Light Absorption ◽  
Potential Applications

In this work, CeO2 nanocrystal-decorated TiO2 nanobelt for forming a CeO2@TiO2 heterostructure. CeO2 plays a dual role in improving photocatalytic activity, not only by promoting the separation and transfer of photogenerated charge carriers, but also by increasing visible light absorption of the photocatalyst as a photosensitizer. The as-prepared CeO2@TiO2 heterostructure demonstrates the performance of organic degradation and H2 production (about 17 μmol/h/g, which is about 2.5 times higher than that of pure TiO2 nanobelts). Our work provides a facile and controllable synthesis method for high performance photocatalyst, which will have potential applications in synthesis clean/solar fuel, and photocatalytic water treatment.

Efficient and controllable synthesis of highly substituted gelatin methacrylamide for mechanically stiff hydrogels

RSC Advances ◽  
2015 ◽  
Vol 5 (128) ◽  
pp. 106094-106097 ◽  
Author(s):  
Bae Hoon Lee ◽  
Hitomi Shirahama ◽  
Nam-Joon Cho ◽  
Lay Poh Tan
Keyword(s):  
Synthesis Method ◽  
Controllable Synthesis ◽  
Ph Adjustment

An efficient and controllable synthesis method for gelatin methacrylamide is described. By sequential loading of methacrylic anhydride (MAA) after pH adjustment in an alkaline buffer, nearly complete substitution is achieved with small use of MAA.

Facile microwave-assisted synthesis and controllable architecture of three-dimensional nickel titanate

CrystEngComm ◽  
2015 ◽  
Vol 17 (24) ◽  
pp. 4562-4574 ◽  
Author(s):  
Thuy-Duong Nguyen-Phan ◽  
Chinh Nguyen Huy ◽  
Chang-Koo Kim ◽  
Eun Woo Shin
Keyword(s):  
Crystal Growth ◽  
Three Dimensional ◽  
Polyol Synthesis ◽  
Microwave Assisted Synthesis ◽  
Shape Evolution ◽  
One Pot ◽  
Microwave Assisted ◽  
Nickel Titanate

A rapid, facile, one-pot microwave-assisted polyol synthesis of novel hierarchical nickel titanate is first reported. The roles of medium dielectric and precursor counterion in the crystal growth and shape evolution are investigated.

Controllable Synthesis of CuO Nanowires and Cu2O Crystals with Shape Evolution via γ-Irradiation

2010 ◽  
Vol 49 (16) ◽  
pp. 7217-7219 ◽  
Author(s):  
Zibin Hai ◽  
Chunhua Zhu ◽  
Jianliu Huang ◽  
Huarong Liu ◽  
Jiafu Chen
Keyword(s):  
Shape Evolution ◽  
Controllable Synthesis ◽  
Γ Irradiation ◽  
Cuo Nanowires

Structural Characterization of Nanoparticles Obtained by a Polyol Synthesis in the Bimetallic System Pt-Pd

2012 ◽  
Vol 1372 ◽  
Author(s):  
A. F. García-Ruiz ◽  
J. J. Velázquez Salazar ◽  
R. Esparza ◽  
N. Castillo
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Bimetallic Nanoparticles ◽  
Synthesis Method ◽  
Shell Structures ◽  
Polyol Synthesis ◽  
Core Shell ◽  
Thermal Methods ◽  
Transmission Electron ◽  
Bimetallic System

ABSTRACTA modified polyol synthesis has been utilized to study the different structures obtained in the bimetallic system of platinum (Pt) and palladium (Pd). Some results are shown in this work. Thermal methods under refluxing, carrying on the reaction up to 285 ºC, have been assayed to reduce metallic salts using ethylene glycol (EG) as reducer and polyvinylpyrrolidone (PVP) as protective reagent of the formed bimetallic nanoparticles. The special core-shell structure has been observed in these bimetallic nanoparticles, whose synthesis was assisted by Ag, showing polyhedral shapes. The average diameter size of the core has been estimated at 10 nm, and the diameter size of the shell in 13 nm, consequently the thickness of the shell is around 1.5 nm. Nanoparticles were structurally characterized with transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM) equipped with detector to generate high angle annular dark field (HAADF) images. This kind of structures have been studied and utilized to increase successfully the catalytic properties of monometallic nanoparticles of Pt or Pd according to other works. Here, the synthesis procedure is described; as the main results, several images are presented showing the obtained bimetallic core-shell structures and their fast Fourier transform (FFT), and also the size and the elemental analysis of the nanoparticles are reported, concluding that this synthesis method is very efficient for preparing bimetallic core shell structures.

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