نتایج جستجو برای: mesoporous carbon nitride

تعداد نتایج: 302265  

Journal: :Angewandte Chemie 2021

Ni-deposited mesoporous graphitic carbon nitride (Ni-mpg-CNx) is introduced as an inexpensive, robust, easily synthesizable and recyclable material that functions integrated dual photocatalytic system. This overcomes the need of expensive photosensitizers, organic ligands additives well limitations catalyst deactivation in existing photo/Ni catalytic cross-coupling reactions. The Ni-mpg-CNx dem...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2006
Huan Wang Frank L Y Lam Xijun Hu Ka Ming Ng

An ordered mesoporous carbon, CMK-3, was synthesized using a mesoporous siliceous material, SBA-15, as the template. CMK-3 was characterized and used for the adsorption of fullerenes C60 and C70. It was found that the adsorption capacity of CMK-3 is 4 times higher than that of activated carbon. The adsorption equilibrium isotherms of C60 and C70 on CMK-3 were studied for both single and binary ...

2016
Mihai Sopronyi Felix Sima Cyril Vaulot Luc Delmotte Armel Bahouka Camelia Matei Ghimbeu

The design of mesoporous carbon materials with controlled textural and structural features by rapid, cost-effective and eco-friendly means is highly demanded for many fields of applications. We report herein on the fast and tailored synthesis of mesoporous carbon by UV and IR laser assisted irradiations of a solution consisting of green phenolic resins and surfactant agent. By tailoring the UV ...

2003
S. E. Rodil A. C. Ferrari

In this paper we study the effect of introducing nitrogen into different carbon networks. Two kinds of carbon nitride films were deposited: (a) Using a DC-magnetron sputtering system sp bonded carbon nitride (a-CN) films were deposited and (b) Using a 2 combination of filtered cathodic vacuum arc and a low-pressure N plasma source, N was introduced into sp carbon networks 3 2 (ta-C), leading to...

Journal: :Angewandte Chemie 2022

The synthesis of primary anilines via sustainable methods remains a challenge in organic synthesis. We report photocatalytic protocol for the selective cross-coupling wide range aryl/heteroaryl halides with sodium azide using photocatalyst powder consisting nickel(II) deposited on mesoporous carbon nitride (Ni-mpg-CNx). This heterogeneous contains high surface area visible light-absorbing and a...

Journal: :Chemcatchem 2021

Nanostructuring earth-abundant metals as single atoms or clusters of controlled size on suitable carriers opens new routes to develop high-performing heterogeneous catalysts, but resolving speciation trends remains challenging. Here, we investigate the potential low-nuclearity iron catalysts in continuous liquid-phase semi-hydrogenation various alkynes. The activity depends multiple factors, in...

Journal: :international journal of nanoscience and nanotechnology 2010
m. masoumi m. r. mehrnia m. m. montazer-rahmati a. m. rashidi

chemical vapor deposition was employed to synthesize carbon nanotubes with ni-loaded mcm-41 and mcm-48 as catalysts and acetylene as precursor at 750°c. mesoporous ni mcm-41 and ni mcm-48 molecular sieves were synthesized by a hydrothermal method and were characterized by xrd and n2 adsorption isotherm. the catalytically synthesized carbon materials were characterized with raman spectroscopy, n...

Journal: :ACS nano 2014
Ovidiu Cretu Hannu-Pekka Komsa Ossi Lehtinen Gerardo Algara-Siller Ute Kaiser Kazu Suenaga Arkady V Krasheninnikov

We report the formation and characterization of boron nitride atomic chains. The chains were made from hexagonal boron nitride sheets using the electron beam inside a transmission electron microscope. We find that the stability and lifetime of the chains are significantly improved when they are supported by another boron nitride layer. With the help of first-principles calculations, we prove th...

Journal: :Physical chemistry chemical physics : PCCP 2015
Jiacheng Wang Hu Zhou Jiandong Zhuang Qian Liu

A series of magnetic γ-Fe2O3, Fe3O4, and Fe nanoparticles have been successfully introduced into the mesochannels of ordered mesoporous carbons by the combination of the impregnation of iron salt precursors and then in situ hydrolysis, pyrolysis and reduction processes. The magnetic nanoparticles are uniformly dispersed and confined within the mesopores of mesoporous carbons. Although the as-pr...

Journal: :Nanoscale 2015
Aibing Chen Yifeng Yu Rujie Wang Yunhong Yu Wenwei Zang Pei Tang Ding Ma

A nanocasting method to fabricate nitrogen-doped dual mesoporous carbon is proposed by the carbonization of nitrile functional ionic liquid (FIL) grafted SBA-15 for the first time. These carbon materials have high nitrogen content (12.8%), large specific surface areas (763 m(2) g(-1)) and uniform rod morphologies, which are derived from FILs grafted on the surface of SBA-15. Furthermore, by adj...

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