Two dimensional graphene oxides converted to three dimensional P, N, F and B, N, F tri-doped graphene by ionic liquid for efficient catalytic performance

Carbon ◽  
2019 ◽  
Vol 151 ◽  
pp. 53-67 ◽  
Author(s):  
Balaji Murugesan ◽  
Nithya Pandiyan ◽  
Mayakrishnan Arumugam ◽  
Muthulakshmi Veerasingam ◽  
Jegatheeswaran Sonamuthu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Graphene Oxides ◽  
Doped Graphene

Three dimensional nitrogen-doped graphene hydrogels with in situ deposited cobalt phosphate nanoclusters for efficient oxygen evolution in a neutral electrolyte

2016 ◽  
Vol 1 (1) ◽  
pp. 41-44 ◽  
Author(s):  
Anthony Vasileff ◽  
Sheng Chen ◽  
Shi Zhang Qiao
Keyword(s):  
Oxygen Evolution ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Neutral Electrolyte ◽  
Cobalt Phosphate ◽  
Excellent Catalytic Performance

Nitrogen doped graphene hydrogel electrocatalysts with in situ deposited cobalt phosphate demonstrated excellent catalytic performance toward oxygen evolution in a neutral electrolyte.

scholarly journals Switching adsorption and growth behavior of ultrathin [C2C1Im][OTf] films on Au(111) by Pd deposition

2016 ◽  
Vol 18 (36) ◽  
pp. 25143-25150 ◽  
Author(s):  
F. Rietzler ◽  
B. May ◽  
H.-P. Steinrück ◽  
F. Maier
Keyword(s):  
Ionic Liquid ◽  
Photoelectron Spectroscopy ◽  
Three Dimensional ◽  
Liquid Films ◽  
Growth Behavior ◽  
Growth Mode ◽  
Two Dimensional ◽  
X Ray ◽  
Dimensional Growth

In vacuo deposition of ultrathin ionic liquid films combined with angle-resolved X-ray photoelectron spectroscopy demonstrates that the initial three-dimensional growth mode of [C2C1Im][OTf] deposited onto the bare Au(111) surface can be switched to two-dimensional growth by adding submonolayer amounts of Pd.

A multifunctional Zr-MOF for the rapid removal of Cr2O72−, efficient gas adsorption/separation, and catalytic performance

2020 ◽  
Vol 4 (4) ◽  
pp. 1150-1157 ◽  
Author(s):  
Xiurong Zhang ◽  
Xia Wang ◽  
Weidong Fan ◽  
Yutong Wang ◽  
Xiaokang Wang ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Functional Material ◽  
Rapid Removal

A three-dimensional framework with two-dimensional channels (UPC-50) is obtained. The stable UPC-50 is a multi-functional material for the rapid removal of Cr2O72−, efficient gas adsorption/separation, and catalytic performance.

Ionic Liquid-assisted Preparation of Two-dimensional ZnO/Fe3O4 Nano-composites and their Application in Polysubstituted Pyrroles Synthesis

2020 ◽  
Vol 23 (1) ◽  
pp. 55-65
Author(s):  
Hossein Karami ◽  
Maryam Sabbaghan ◽  
Zinatossadat Hossaini ◽  
Faramarz Rostami-Charati
Keyword(s):  
Ionic Liquid ◽  
Catalytic Performance ◽  
Sem Analysis ◽  
Soft Template ◽  
Primary Amines ◽  
Nano Composites ◽  
Two Dimensional ◽  
Catalytic Systems ◽  
Green Catalyst ◽  
Excellent Catalytic Performance

Aim and Objective: Ionic liquids are a suitable medium for stabilization and preparation of catalytic systems. Materials and Methods: The two-dimensional (2D) ZnO/Fe3O4 nanocomposites were synthesized using ionic liquid [OMIM]Br as a stabilizer and soft template. The nanocomposites were characterized via FTIR, XRD, VSM and SEM analysis. Results: The catalytic activity of these composites was evaluated using a multicomponent reaction of primary amines, acetylacetone, and 2-bromoacetophenone. Conclusion: 2D ZnO/Fe3O4 as a recyclable and green catalyst showed excellent catalytic performance for the preparation of poly-substituted pyrroles.

Synthesis of supramolecular ionic liquid grafted three-dimensional nitrogen-doped graphene as a modified cationic polymer

RSC Advances ◽  
2014 ◽  
Vol 4 (65) ◽  
pp. 34604-34609 ◽  
Author(s):  
Hanif Kazerooni ◽  
Bahram Nassernejad
Keyword(s):  
Ionic Liquid ◽  
Three Dimensional ◽  
Cationic Polymer ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

In this report, supramolecular ionic liquid supported on three-dimensional nitrogen-doped graphene-based frameworks with folate (SIL-g-3D-(N)GFs-folate) was successfully synthesized and characterized.

scholarly journals Ligand-Free Nano-Au Catalysts on Nitrogen-Doped Graphene Filter for Continuous Flow Catalysis

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 688 ◽  
Author(s):  
Yanbiao Liu ◽  
Xiang Liu ◽  
Shengnan Yang ◽  
Fang Li ◽  
Chensi Shen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Continuous Flow ◽  
High Performance ◽  
Catalytic Performance ◽  
Two Dimensional ◽  
Nitrogen Doped ◽  
Catalytic Filter ◽  
Ligand Free ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

In this study, the authors rationally designed a high-performance catalytic filter for continuous flow catalysis. The catalytic filter consisted of ligand-free nanoscale gold (nano-Au) catalysts and nitrogen-doped graphene (N-rGO). The Au catalyst was fabricated in situ onto a pre-formed N-rGO support by the NaBH4 reduction of the Au precursor, and the size of the nano-Au was fine-tuned. A hydrothermal pretreatment of graphene oxide enriched nitrogen-containing species on the surface of two-dimensional graphene supports and enhanced the affinity of Au precursors onto the support via electrocatalytic attraction. The nano-Au catalysts acted as high-performance catalysts, and the N-rGO acted as ideal filter materials to anchor the catalysts. The catalytic activity of the as-designed catalytic filter was evaluated using 4-nitrophenol (4-NP) hydrogenation as a model catalytic reaction. The catalytic filters demonstrated superior catalytic activity and excellent stability, where a complete 4-nitrophenol conversion was readily achieved via a single pass through the catalytic filter. The as-fabricated catalytic filter outperformed the conventional batch reactors due to evidently improved mass transport. Some key operational parameters impacting the catalytic performance were identified and optimized. A similar catalytic performance was also observed for three 4-nitrophenol spiked real water samples (e.g., surface water, tap water, and industrial dyeing wastewater). The excellent catalytic activity of the nano-Au catalysts combined with the two-dimensional and mechanically stable graphene allowed for the rational design of various continuous flow catalytic membranes for potential industrial applications.

High Resolution Microscopy of Multi-Layered Biological Crystals

1982 ◽  
Vol 40 ◽  
pp. 80-83
Author(s):  
H.A. Cohen ◽  
T.W. Jeng ◽  
W. Chiu
Keyword(s):  
High Resolution ◽  
Low Dose ◽  
Three Dimensional ◽  
Data Interpretation ◽  
Two Dimensional ◽  
Biological Objects ◽  
Density Maps ◽  
Density Map ◽  
Complex Crystal ◽  
High Resolution Microscopy

This tutorial will discuss the methodology of low dose electron diffraction and imaging of crystalline biological objects, the problems of data interpretation for two-dimensional projected density maps of glucose embedded protein crystals, the factors to be considered in combining tilt data from three-dimensional crystals, and finally, the prospects of achieving a high resolution three-dimensional density map of a biological crystal. This methodology will be illustrated using two proteins under investigation in our laboratory, the T4 DNA helix destabilizing protein gp32*I and the crotoxin complex crystal.

Instrumentation For Quantitative Microscopy

1977 ◽  
Vol 35 ◽  
pp. 206-209
Author(s):  
B. Ralph ◽  
A.R. Jones
Keyword(s):  
Volume Fraction ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Automatic Data ◽  
Phase Volume Fraction ◽  
Statistical Confidence ◽  
Resultant Data ◽  
Automatic Data Collection ◽  
Third Dimension ◽  
Evolution Of Microstructure

In all fields of microscopy there is an increasing interest in the quantification of microstructure. This interest may stem from a desire to establish quality control parameters or may have a more fundamental requirement involving the derivation of parameters which partially or completely define the three dimensional nature of the microstructure. This latter categorey of study may arise from an interest in the evolution of microstructure or from a desire to generate detailed property/microstructure relationships. In the more fundamental studies some convolution of two-dimensional data into the third dimension (stereological analysis) will be necessary.In some cases the two-dimensional data may be acquired relatively easily without recourse to automatic data collection and further, it may prove possible to perform the data reduction and analysis relatively easily. In such cases the only recourse to machines may well be in establishing the statistical confidence of the resultant data. Such relatively straightforward studies tend to result from acquiring data on the whole assemblage of features making up the microstructure. In this field data mode, when parameters such as phase volume fraction, mean size etc. are sought, the main case for resorting to automation is in order to perform repetitive analyses since each analysis is relatively easily performed.

A linearity test for thick specimens imaged by HVEM over a 180° angular range

1991 ◽  
Vol 49 ◽  
pp. 552-553
Author(s):  
Yu Liu
Keyword(s):  
Phase Contrast ◽  
Three Dimensional ◽  
Angular Range ◽  
Two Dimensional ◽  
Back Projection ◽  
Line Integral ◽  
Exponential Law ◽  
Transmission Electron ◽  
Absorption Law ◽  
Linearity Test

The image obtained in a transmission electron microscope is the two-dimensional projection of a three-dimensional (3D) object. The 3D reconstruction of the object can be calculated from a series of projections by back-projection, but this algorithm assumes that the image is linearly related to a line integral of the object function. However, there are two kinds of contrast in electron microscopy, scattering and phase contrast, of which only the latter is linear with the optical density (OD) in the micrograph. Therefore the OD can be used as a measure of the projection only for thin specimens where phase contrast dominates the image. For thick specimens, where scattering contrast predominates, an exponential absorption law holds, and a logarithm of OD must be used. However, for large thicknesses, the simple exponential law might break down due to multiple and inelastic scattering.

An Image Reconstruction System Applied to High Voltage Microscopy

1975 ◽  
Vol 33 ◽  
pp. 292-293
Author(s):  
D. E. Johnson
Keyword(s):  
High Voltage ◽  
Prior Information ◽  
Block Diagram ◽  
Three Dimensional ◽  
Real Space ◽  
Two Dimensional ◽  
Efficient Manner ◽  
Fourier Methods ◽  
Tilt Series ◽  
Methods Of Reconstruction

Increased specimen penetration; the principle advantage of high voltage microscopy, is accompanied by an increased need to utilize information on three dimensional specimen structure available in the form of two dimensional projections (i.e. micrographs). We are engaged in a program to develop methods which allow the maximum use of information contained in a through tilt series of micrographs to determine three dimensional speciman structure.In general, we are dealing with structures lacking in symmetry and with projections available from only a limited span of angles (±60°). For these reasons, we must make maximum use of any prior information available about the specimen. To do this in the most efficient manner, we have concentrated on iterative, real space methods rather than Fourier methods of reconstruction. The particular iterative algorithm we have developed is given in detail in ref. 3. A block diagram of the complete reconstruction system is shown in fig. 1.

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