One-step molybdate ion assisted electrochemical synthesis of α-MoO3-decorated graphene sheets and its potential applications

2011 ◽  
Vol 21 (38) ◽  
pp. 15009 ◽  
Author(s):  
Jiangbo Hu ◽  
Anas Ramadan ◽  
Fang Luo ◽  
Bin Qi ◽  
Xiaojiao Deng ◽  
...  
Keyword(s):  
Electrochemical Synthesis ◽  
Graphene Sheets ◽  
Potential Applications ◽  
One Step

One-Step Ionic-Liquid-Assisted Electrochemical Synthesis of Ionic-Liquid-Functionalized Graphene Sheets Directly from Graphite

2008 ◽  
Vol 18 (10) ◽  
pp. 1518-1525 ◽  
Author(s):  
Na Liu ◽  
Fang Luo ◽  
Haoxi Wu ◽  
Yinghui Liu ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Synthesis ◽  
Graphene Sheets ◽  
Functionalized Graphene ◽  
One Step

Preparation of hollow Fe3O4 spheres through a facile method and their applications

2017 ◽  
Vol 10 (06) ◽  
pp. 1750075 ◽  
Author(s):  
Xingping Wu ◽  
Aiping Zhu ◽  
Zhaodong Nan
Keyword(s):  
Saturation Magnetization ◽  
Ostwald Ripening ◽  
Solvothermal Method ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Solid Sphere ◽  
Small Particles ◽  
Potential Applications ◽  
One Step ◽  
Solid Spheres

Fe3O4 hollow microspheres with good dispersibility and high saturation magnetization were synthesized through a facile one-step solvothermal method. The formation mechanism of the hollow structure was studied by taking time-dependent experiments. Porous [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3 nanosheets were firstly fabricated. Fe3O4 solid spheres aggregated by small particles were obtained from the transition of [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3. Finally, the solid sphere is transferred to hollow sphere through Ostwald ripening. The maximum saturation magnetization of the hollow spheres is [Formula: see text][Formula: see text]emu/g, which is higher than some results reported in references. The Fe3O4 hollow spheres show potential applications in microwave absorption and photocatalysis.

Preparation and Characterization of Hybrid Graphene-ZnS Nanoparticles

2010 ◽  
Vol 663-665 ◽  
pp. 894-897
Author(s):  
Hua Huang ◽  
Hai Hu Yu ◽  
Ling De Zhou ◽  
Er Dan Gu ◽  
De Sheng Jiang
Keyword(s):  
Coupling Effect ◽  
Zinc Acetate Dihydrate ◽  
Graphene Sheets ◽  
Acetate Dihydrate ◽  
Zns Nanoparticles ◽  
Transmission Electron ◽  
Infrared Spectrometer ◽  
One Step ◽  
Average Size

Hybrid Graphene-ZnS nanopaticles (G-ZnS NPs) were prepared by using a solvothermal method. A dispersion of graphite oxide (GO) and zinc acetate dihydrate (Zn(CH3COO)2.2H2O) in dimethl sulfoxide (DMSO) reacted at 180 °C for 12 h in a Telfon-lined stainless steel autoclave. In the reaction, DMSO serves as a sulphide source as well as a reducing agent, resulting formation of the hybrid G-ZnS NPs in one-step. Hybrid G-ZnS NPs were characterized by using a powder X-ray diffractometer, a Fourier-transform infrared spectrometer, a transmission electron microscope, a UV-vis spectrophotometer and a fluorescence spectrophotometer, respectively. In the FTIR spectra, the GO related stretching bands of C-O and carboxyl groups are not observed in the spectra of G-ZnS, suggesting that the GO sheets were reduced to graphene sheets. In the TEM images, it is observed that the ZnS nanoparticles with an average size of 23 nm are attached onto the graphene sheets. The UV-vis absorption spectrum of the G-ZnS NPs dispersed in ethanol has an absorption peak of G at 261 nm and a weak shoulder of ZnS NPs around 320 nm. The broadening and weakening of the peak of ZnS NPs at 320 nm arises from the interparticle coupling effect. Under excitation at 225 nm, a peak around 386 nm and other weaker bands appear in the fluorescence spectrum of the G-ZnS. The band at 386 nm is attributed to zinc vacancies.

scholarly journals Dynamic porous property in a new heterometallic supramolecular compound

2014 ◽  
Vol 70 (a1) ◽  
pp. C1474-C1474
Author(s):  
Patrice Kenfack ◽  
Emmanuel Wenger ◽  
Slimane Dahaoui ◽  
John Lambi ◽  
Pierrick Durand ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Self Assembly ◽  
Water Clusters ◽  
Chair Conformation ◽  
Unit Cell ◽  
Supramolecular Compounds ◽  
Multifunctional Compounds ◽  
Potential Applications ◽  
One Step ◽  
Mean Vector

Supramolecular compounds have attracted considerable interest to chemists, physicists and materials scientists due to their fascinating structures and potential applications as porosity [1-3] but one of the most appealing aims today, is to build multifunctional compounds. We are interested to rationalize the synthesis of porous heterometallic compounds by self- assembly via hydrogen bonds. In this communication, we present a stacked 2D Catena-{Co(amp)3Cr(ox)3.6H2O} (amp = 2-picolylamine, ox=oxalate). It is built by layers in which both (Co(amp)3+ (D) and Cr(ox)3- ( A)) ionic units are linked in a repeating DADADA...pattern along both the a and c axis with four and two hydrogen bonds respectively. These layers host very well resolved dodecameric discrete ring water clusters (R12) built by six independent molecules located around the centrosymmetric Wyckoff position's of the P21/n space group in which the compound crystallizes. The clusters are ranged along the [001] direction, occupy 807.6 Å3 (23.9%) of the unit cell and have a chair conformation via 10 hydrogen bonds. The dehydration process of the compound occurs in one step around 77oC and the dehydrated compound remains crystalline although all framework atoms move by 2.25 Å along a mean vector (dm= 2.21 i + 0.17 j + 0.37 k) during the process. The unit cell is then reduced by 12.34 % along a, 12.22% along b and 2. 03% along c reducing V by 22.03%. By exposure to air, the regeneration of the compound needs 90 min, following the first kinetic Avrami's model.

scholarly journals Enhanced electrochemical performance of α-MoO3/graphene nanocomposites prepared by an in situ microwave irradiation technique for energy storage applications

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22836-22847
Author(s):  
P. Nagaraju ◽  
M. Arivanandhan ◽  
A. Alsalme ◽  
A. Alghamdi ◽  
R. Jayavel
Keyword(s):  
Energy Storage ◽  
Microwave Irradiation ◽  
Electrochemical Performance ◽  
Graphene Sheets ◽  
Microwave Irradiation Method ◽  
Graphene Nanocomposites ◽  
One Step ◽  
Energy Storage Applications ◽  
Enhanced Electrochemical Performance

Nanoparticles of α-molybdenum oxide (α-MoO3) are directly grown on graphene sheets using a surfactant-free facile one step ultrafast in situ microwave irradiation method.

One-step electrochemical synthesis of Bi3.84W0.16O6.24 with superior photocatalytic activities

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20234-20237 ◽  
Author(s):  
Zuwei Song ◽  
Hui Dai ◽  
Jiantao Tong
Keyword(s):  
Electrochemical Synthesis ◽  
Room Temperature ◽  
Photocatalytic Activities ◽  
One Step

Bi3.84W0.16O6.24 nanoparticles were successfully prepared by a facile electrochemical route at room temperature in just 10 minutes.

Study on Synthesis and Characterization of AgCl Microparticle Materials Based on One-Step Solution Phase Route

2012 ◽  
Vol 568 ◽  
pp. 295-298
Author(s):  
Juan Liao ◽  
Kai Zhang ◽  
Wen Zhong Wang ◽  
Yong Gang Wang ◽  
Li Yu
Keyword(s):  
Reaction Times ◽  
Average Diameter ◽  
Solution Phase ◽  
Synthesis And Characterization ◽  
Sem Images ◽  
X Ray ◽  
Potential Applications ◽  
One Step ◽  
Size And Morphology

AgCl microparticle materials, with novel heart-like morphology, were successfully prepared by means of a simple solution phase route, in which a small amount of hydrochloric acid, ethylene and PVP were introduced to the conventional polyol process. The obtained microparticle materials were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and UV-Vis absorption spectrum. SEM images show that the obtained AgCl microparticle materials have heart-like morphology with an average diameter of 3 um. The influence of different reaction times on size and morphology of the microparticle materials were also investigated. A possible growth mechanism of AgCl microparticle materials has been proposed on the basis of experimental results and analysis. The as-prepared AgCl microparticle materials would find possible potential applications in photocatalytic fields.

Ab initio Computationally Generated Nanoporous Carbon and its Comparison to Experiment

2008 ◽  
Vol 1145 ◽  
Author(s):  
Cristina Romero ◽  
Ariel A. Valladares ◽  
R. M. Valladares ◽  
Alexander Valladares ◽  
Alipio G. Calles
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Nanoporous Carbon ◽  
Group Iv ◽  
Distribution Functions ◽  
Graphene Sheets ◽  
Radial Distribution Functions ◽  
Carbon Chains ◽  
Potential Applications ◽  
Dynamics Process

AbstractNanoporous carbon is a widely studied material due to its potential applications in hydrogen storage or for filtering undesirable products. Most of the developments have been experimental although some simulation work has been carried out based on the use of graphene sheets and/or carbon chains and classical molecular dynamics. Here we present an application of our recently developed ab initio method [1] for the generation of group IV porous materials. The method consists in constructing a crystalline diamond supercell with 216 atoms of carbon and a density of 3.546 g/cm3, then lengthening the supercell edge to obtain a density of 1.38 g/cm3, yielding a porosity of 61.1 % in order to be able to compare with experimental results reported in the literature [2]. We then subject the resulting supercell to an ab initio molecular dynamics process at 1000 K during 295 steps. The radial distribution functions obtained are compared to experiment to discern coincidences and discrepancies.

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