Preparation of tungsten carbide nanosheets with large surface area using an in situ DWCNT template

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47414-47420 ◽  
Author(s):  
Zi Ping Wu ◽  
Man Zhao ◽  
Jing Wei Hu ◽  
Wei Bo Zhang ◽  
Yan Hong Yin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Carbon Source ◽  
Tungsten Carbide ◽  
Surface Area ◽  
Large Surface Area ◽  
Liquid Carbon ◽  
Surface Areas ◽  
20 Nm

H2WO4 sheets approximately 50 nm long and 20 nm wide were prepared using a DWCNT template, and WC nanosheets with large surface areas were obtained when the H2WO4 was carbonized at a low temperature using a liquid carbon source.

scholarly journals In situ K2S activated electrospun carbon nanofibers with hierarchical meso/microporous structures for supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (57) ◽  
pp. 33539-33548
Author(s):  
Hua Liu ◽  
Weiguo Song ◽  
Aihua Xing
Keyword(s):  
Surface Area ◽  
Carbon Nanofibers ◽  
Large Surface Area

K2S was found to be an excellent in situ activation agent for the fabrication of electrospun carbon nanofibers with large surface area (835.0 m2 g−1) and hierarchical meso/microporous structures.

Low-temperature synthesis of δ-MnO2 with large surface area and its capacitance

2010 ◽  
Vol 64 (16) ◽  
pp. 1763-1765 ◽  
Author(s):  
Gang Zhu ◽  
Hongjuan Li ◽  
Lingjuan Deng ◽  
Zong-Huai Liu
Keyword(s):  
Low Temperature ◽  
Surface Area ◽  
Large Surface Area ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis

Design of Novel Treated Silica Xerogels: Synthesis, Property and Reinforcement in Silicone Elastomers

1998 ◽  
Vol 520 ◽  
Author(s):  
Q. Deng ◽  
G. T. Bums ◽  
J. R. Hahn ◽  
C. C. Reese ◽  
J. D. Preston ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Area ◽  
Silica Xerogels ◽  
Silicone Elastomers ◽  
Surface Areas ◽  
Reinforcing Fillers ◽  
Controlled Porosity ◽  
The Relationship ◽  
Filler Structure

ABSTRACTTreated silica xerogels with controlled porosity and surface area were prepared by the in-situ treatment of hydrogels with hexamethyldisiloxane in the presence of isopropyl alcohol. The resulting hydrogels were hydrophobic and readily transferred to organic solvents allowing their isolation. The surface area and porosity of the xerogel were controlled by varying the pH, time and temperature used to aggregate the hydrogel prior to treatment. The treated xerogels were evaluated as reinforcing fillers in silicone rubber formulations. When the bases were crosslinked with peroxides, silicone elastomers with acceptable mechanical properties were obtained. The relationship between the surface area, porosity and the type and degree of surface treatment of the xerogel, and its reinforcing ability was studied. In general, the mechanical properties of the elastomer increased as the filler structure increased; however, xerogels with higher surface areas were more difficult to incorporate and gave higher plasticity bases.

Large Surface Area of HMDS Plasma Polymerized Thin Film Used for Production of Miniaturized Structures

2010 ◽  
Vol 636-637 ◽  
pp. 1065-1072 ◽  
Author(s):  
Lilian Marques Silva ◽  
Roberto R. Lima ◽  
E.R. Fachini ◽  
E.W. Simões ◽  
E. Pecoraro ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Area ◽  
Preliminary Analysis ◽  
Low Cost ◽  
Large Surface Area ◽  
Polar Organic Compounds ◽  
Organic Mixtures ◽  
Surface Areas ◽  
Good Agreement

The aim of this work was the production of a large surface area of hexamethyldisilazane (HMDS) plasma-deposited thin films and their applicability in a miniaturized structure useful for preliminary analysis of organic mixtures. The HMDS plasma films were produced with different surface areas and morphologies, and all films adsorbed polar and non-polar organic compounds. A low cost miniaturized structure was manufactured in glass using a Milling cutter and covered with HMDS plasma films. Good agreement was observed between simulation and experimental results on those microstructures. The observed different performance between pure and mixtures of organic compound samples suggests that the proposed system is a simple setup that could be useful for rough analysis of a fuel.

scholarly journals Fast and sensitive metronidazole determination by means of voltammetry on renewable amalgam silver based electrode without the preconcentration step

2017 ◽  
Vol 82 (7-8) ◽  
pp. 879-890 ◽  
Author(s):  
Robert Piech ◽  
Joanna Smajdor ◽  
Beata Paczosa-Bator ◽  
Martyna Rumin
Keyword(s):  
Surface Area ◽  
Limit Of Detection ◽  
Pulse Height ◽  
Differential Pulse ◽  
Calibration Graph ◽  
Large Surface Area ◽  
Reduction Peak ◽  
Step Potential ◽  
Relative Standard ◽  
20 Nm

Application of cyclic renewable amalgam silver-based electrode (Hg(Ag)FE) for sensitive metronidazole detection by the differential pulse voltammetry (DPV) is described. The unique properties of the Hg(Ag)FE such as the relative large surface area and its fast and very simple renewal were fully utilized for sensitive measurements. Compared with the classical hanging mercury drop electrode (HMDE), the renewable Hg(Ag)FE significantly increases the reduction peak current of metronidazole because of its large surface area. The effects of various factors for the metronidazole determination such as: pulse height and width, step potential, surface area of the working electrode, and basic electrolyte composition are optimized. The obtained calibration graph is linear from 0.1 (17 ?g L-1) to 2 ?M (342 ?g L-1) with correlation coefficient 0.999. For the Hg(Ag)FE with the surface area of 10.1 mm2 the limit of detection (LOD) is 20 nM (3.4 ?g L-1). The repeatability of the method at a concentration of the analyte of 0.5 ?M (5.6 ?g L?1), expressed as relative standard deviation (RSD) is 2.1 % (n = 7). The proposed method was successfully applied and confirmed by studying recovery of metronidazole from spiked samples.

Synthesis and Characterization of RuO2 Anode Materials with Large Surface Areas for Oxygen Evolution Reaction

2012 ◽  
Vol 15 (4) ◽  
pp. 271-276 ◽  
Author(s):  
Yang Zhang ◽  
Lixia Yue ◽  
Ke Teng ◽  
Shiyong Yuan ◽  
Hongchao Ma
Keyword(s):  
Porous Structure ◽  
Electrochemical Properties ◽  
Surface Area ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Mesoporous Structure ◽  
Large Surface Area ◽  
Precipitation Method ◽  
Surface Areas ◽  
Lower Temperature

A novel olivary or petal-like RuO2 material with large surface area was successfully synthesized by surfactant-assisted homogeneous precipitation method using urea and dodecyl sulfate as the source reagent. The surface morphology, structural, and electrochemical properties of as-synthesized RuO2 materials were characterized by x-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), Cyclic voltammetry (CV), N2 adsorption–desorption isotherms and polarization curve for oxygen evolution reaction (OER). It was found that the morphology and crystalline structures and electrochemical properties of as-synthesized RuO2 materials were strongly dependent on the calcining temperature. The ruthenium-surfactant mesophase with mesoporous structure transformed from network to regular olivary or petal-like RuO2 materials and remaining partial mesoporous character after calcination at lower temperature (i.e., 300 and 400 °C). However, the mesophase transformed into RuO2 agglomeration consisted of nanosized particles after calcination at 650 °C, which may be attributed to complete deorganization and porous structure collapse of RuO2 materials. In addition, the as-synthesized RuO2 materials showed higher specific surface area and better electrochemical activities for oxygen evolution reaction compared with the RuO2 prepared without surfactant. The electrochemical activity of as-synthesized RuO2 material calcined at 400 °C is about 3 times than that of RuO2 prepared without surfactant for oxygen evolution reaction. This can be attributed to the porous structure and large surface area of as-synthesized RuO2 materials.

In situ formed graphene/ZnO nanostructured composites for low temperature hydrogen sulfide removal from natural gas

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 81142-81150 ◽  
Author(s):  
Sunil P. Lonkar ◽  
Vishnu Pillai ◽  
Ahmed Abdala ◽  
Vikas Mittal
Keyword(s):  
Hydrogen Sulfide ◽  
Low Temperature ◽  
Zno Nanoparticles ◽  
Freeze Drying ◽  
Nanostructured Composites ◽  
Hydrogen Sulfide Removal ◽  
Highly Dispersed ◽  
Novel Method ◽  
20 Nm

Nanostructured composites of graphene and highly dispersed sub-20 nm sized ZnO nanoparticles (TRGZ) were prepared via a novel method combining freeze-drying and thermal annealing.

Preparation of MnOx/TiO2 ultrafine nanocomposite with large surface area and its enhanced toluene oxidation at low temperature

2011 ◽  
Vol 208 (3) ◽  
pp. 740-743 ◽  
Author(s):  
Eunseuk Park ◽  
Sungmin Chin ◽  
Joosik Kim ◽  
Gwi-Nam Bae ◽  
Jongsoo Jurng
Keyword(s):  
Low Temperature ◽  
Surface Area ◽  
Large Surface Area ◽  
Toluene Oxidation

Synthesis of bulk vanadium oxide with a large surface area using organic acids and its low-temperature NH3-SCR activity

2020 ◽  
Author(s):  
Yusuke Inomata ◽  
Shinichi Hata ◽  
Eiji Kiyonaga ◽  
Keiichiro Morita ◽  
Kazuhiro Yoshida ◽  
...  
Keyword(s):  
Low Temperature ◽  
Organic Acids ◽  
Vanadium Oxide ◽  
Surface Area ◽  
Large Surface Area ◽  
Nh3 Scr
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