Facile single step synthesis of an acid functionalized nano porous carbon composite as an efficient catalyst for tertiary butylation of phenol

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 57223-57226 ◽  
Author(s):  
Devaki Nandan ◽  
Nagabhatla Viswanadham
Keyword(s):  
Porous Carbon ◽  
Coal Tar ◽  
Carbon Composite ◽  
Single Step ◽  
Efficient Catalyst ◽  
Petroleum Waste ◽  
One Step ◽  
Produce Acid ◽  
Waste Coal

A simple, one step, simultaneous carbonization and sulfonation of petroleum waste coal tar was conducted to produce acid functionalized nano porous carbon and applied for tertiary butylation of phenol.

Process Optimization of Preparation of ZnO-Porous Carbon Composite from Spent Catalysts Using One Step Activation

2012 ◽  
Vol 12 (8) ◽  
pp. 6231-6239
Author(s):  
Wen Jin ◽  
Wen-Wen Qu ◽  
C. Srinivasakannan ◽  
Jin-Hui Peng ◽  
Xin-Hui Duan ◽  
...  
Keyword(s):  
Process Optimization ◽  
Porous Carbon ◽  
Carbon Composite ◽  
Spent Catalysts ◽  
One Step

An urchin-like Ni3ZnC0.7–carbon nanotube-porous carbon composite derived from metal–organic gel as a cathode material for rechargeable Li–O2 batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45612-45616 ◽  
Author(s):  
Yanqing Lai ◽  
Wei Chen ◽  
Zhian Zhang ◽  
Yongqing Gan ◽  
Jie Li
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Cathode Material ◽  
Porous Carbon ◽  
Carbon Composite ◽  
Carbon Composites ◽  
Excellent Electrochemical Performance ◽  
Metal Organic ◽  
One Step ◽  
Organic Gel

Urchin-like Ni3ZnC0.7–carbon nanotubes-porous carbon composites are prepared by one-step carbonization of a metal–organic gel. While applied as the cathode material of Li–O2 batteries, the composite exhibits an excellent electrochemical performance.

One-step prepared prussian blue/porous carbon composite derives highly efficient Fe–N–C catalyst for oxygen reduction

2020 ◽  
Vol 45 (30) ◽  
pp. 15100-15111 ◽  
Author(s):  
Pengfei Yin ◽  
Wenli Wang ◽  
Hanbing Rao ◽  
Guangtu Wang ◽  
Mengmeng Sun ◽  
...  
Keyword(s):  
Prussian Blue ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Carbon Composite ◽  
Highly Efficient ◽  
One Step

scholarly journals Facile preparation of lotus seedpod-derived magnetic porous carbon for catalytic oxidation of Ponceau 4R

2021 ◽  
Vol 947 (1) ◽  
pp. 012019
Author(s):  
Minh-Hung Nguyen ◽  
Thi-Linh Nguyen ◽  
Thi-Kim-Linh Nguyen ◽  
Hoa-Hung Lam ◽  
Tuyet-Mai Tran-Thuy ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Total Pore Volume ◽  
Nitrogen Adsorption ◽  
High Specific Surface Area ◽  
Efficient Catalyst ◽  
Nitrogen Adsorption Isotherm ◽  
Sem Image ◽  
One Step ◽  
Ponceau 4R ◽  
Lotus Seedpod

Abstract In this research, magnetic porous carbon was directly synthesized through one-step pyrolysis of FeCl3 – lotus seedpod mixture. Properties of the obtained material were analysed by X-ray powder diffraction, SEM image, nitrogen adsorption isotherm and vibrating sample magnetometer. The results showed that magnetic Fe3O4 particles were successfully formed over material template in 1 hour. The magnetic porous carbon possessed the specific magnetization of 7.13 emu/g, high specific surface area of 288 m2/g and total pore volume of 0.18 cm3/g. The material was subsequently applied as a potential catalyst for Ponceau 4R degradation by H2O2. Parameters including pH, H2O2 concentration, and different types of catalysts were investigated. At pH 3, 200 ppm H2O2, and 0.40 g/L magnetic porous carbon, 83% Ponceau 4R 50 ppm was removed after 120 minutes treatment. Moreover, the catalyst powders were separated from the treated mixture easily by a magnet. Summarily, magnetic porous carbon can promise to be an efficient catalyst in decomposition of Ponceau 4R.

Microstructural control of pitch matrix carbon-carbon composite by iodine treatment

1998 ◽  
Vol 13 (2) ◽  
pp. 302-307 ◽  
Author(s):  
H. Kajiura ◽  
Y. Tanabe ◽  
E. Yasuda ◽  
A. Kaiho ◽  
I. Shiota ◽  
...  
Keyword(s):  
Coal Tar ◽  
Carbon Composite ◽  
Coal Tar Pitch ◽  
Microstructural Development ◽  
Carbon Yield ◽  
Graphitic Structure ◽  
Matrix Microstructure ◽  
Iodine Treatment ◽  
Matrix Precursor ◽  
Microstructural Control

Matrix microstructure of a pitch-based carbon-carbon composite was controlled by an iodine treatment. Coal-tar pitch having the softening point of 101 °C was used as a matrix precursor. The iodine treatment was carried out on a pitch-impregnated specimen at 90 °C for 3–20 h. The specimen was carbonized at 800 °C and graphitized at 2000–3000 °C. The carbon yield increased from 73% to 93% by the iodine treatment. Microstructures of carbonized specimens changed from a flow type texture to a mosaic type one by the iodine treatment. The microstructural development to graphitic structure was suppressed by the iodine treatment.

Synthesis of Polycycles and Oxacycles by Tandem Metathesis of endo–norbornene Derivatives

Synthesis ◽  
2021 ◽  
Author(s):  
Sambasivarao Kotha ◽  
Sunil Pulletikurti ◽  
Ambareen Fatma ◽  
gopal dhangar ◽  
gonna somu Naidu
Keyword(s):  
Natural Products ◽  
Metal Complex ◽  
Carbonyl Group ◽  
Single Step ◽  
Time Dependent ◽  
Computational Studies ◽  
Nmr Studies ◽  
Tricyclic Compounds ◽  
One Step ◽  
Norbornene Derivatives

Here, we have demonstrated that the presence of a carbonyl group at C7 position is preventing the olefin metathesis of endo-norbornene derivatives due to the complexation of the metal alkylidene. Time-dependent NMR studies showed the presence of new proton signals in the metal alkylidene region, which indicate the formation of metal complex with the carbonyl group of the substrate. These observations were further proved by ESI-MS analysis. Whereas, computational studies provided that the catalyst was interacting with the C7 carbonyl group and aligned perpendicular to that of norbornene olefin. Later, these endo-keto norbornene derivatives were reduced to hydroxyl derivatives diastereoselectively. Ring-rearrangement metathesis (RRM) of these hydroxyl derivatives, produced the [6/5/6], and [5/6/5] carbo-tricyclic cores of the natural products in one step. Whereas the RRM of O-allyl derivatives, delivered the oxa-tricyclic compounds in a single step with excellent yields.

One-step fabrication of Pd-embedded hierarchically porous carbon micro-spheres for formaldehyde removal under mild conditions

2021 ◽  
Author(s):  
Zhigang Ren ◽  
peng zhao ◽  
Ye Zhang ◽  
Yang Yu ◽  
xiaoxuan lv ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Carbon Microspheres ◽  
Carbon Spheres ◽  
Pickering Emulsions ◽  
Hierarchically Porous ◽  
Mild Conditions ◽  
Formaldehyde Removal ◽  
One Step

Micron-sized carbon spheres synthesized via pickering emulsions has attracted much attention in recent two years. In present paper, we prepared palladium (Pd) and nitrogen co-embedded carbon microspheres for formaldehyde (HCHO)...

Phenol removal via activated carbon from co-pyrolysis of waste coal tar pitch and vinasse

2021 ◽  
Vol 38 (1) ◽  
pp. 64-71
Author(s):  
Ming Gao ◽  
Xiaona Wang ◽  
Changlei Xia ◽  
Na Song ◽  
Yuhui Ma ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Coal Tar ◽  
Coal Tar Pitch ◽  
Phenol Removal ◽  
Waste Coal

scholarly journals Single Step 2-Port Device De-Embedding Algorithm for Fixture-DUT-Fixture Network Assembly

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1275
Author(s):  
Simone Scafati ◽  
Enza Pellegrino ◽  
Francesco de Paulis ◽  
Carlo Olivieri ◽  
James Drewniak ◽  
...  
Keyword(s):  
Standard Technique ◽  
Single Step ◽  
Scattering Parameters ◽  
Linear Set ◽  
S Parameter ◽  
Parameter Conversion ◽  
Before And After ◽  
One Step ◽  
Typical Measurement

The de-embedding of measurement fixtures is relevant for an accurate experimental characterization of radio frequency and digital electronic devices. The standard technique consists in removing the effects of the measurement fixtures by the calculation of the transfer scattering parameters (T-parameters) from the available measured (or simulated) global scattering parameters (S-parameters). The standard de-embedding is achieved by a multiple steps process, involving the S-to-T and subsequent T-to-S parameter conversion. In a typical measurement setup, two fixtures are usually placed before and after the device under test (DUT) allowing the connection of the device to the calibrated vector network analyzer coaxial ports. An alternative method is proposed in this paper: it is based on the newly developed multi-network cascading algorithm. The matrices involved in the fixture-DUT-fixture cascading gives rise to a non-linear set of equations that is in one step analytically solved in closed form, obtaining a unique solution. The method is shown to be effective and at least as accurate as the standard multi-step de-embedding one.

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