نتایج جستجو برای: janus graphene oxide

تعداد نتایج: 221639  

2016
A.A. Kuznetsov N.R. Maksimova V.S. Kaimonov G.N. Alexandrov S.A. Smagulova

Development of new methods for the diagnosis of point mutations is a pressing issue. We have developed a new approach to the design of graphene oxide-based test systems for the diagnosis of point mutations in native DNA. This new approach is based on the use of graphene oxide for the adsorption and quenching of fluorescently labeled primers in a post-amplification PCR mixture followed by detect...

Journal: :ACS nano 2011
Shuyang Pan Ilhan A Aksay

We have studied the effect of the oxidation path and the mechanical energy input on the size of graphene oxide sheets derived from graphite oxide. The cross-planar oxidation of graphite from the (0002) plane results in periodic cracking of the uppermost graphene oxide layer, limiting its lateral dimension to less than 30 μm. We use an energy balance between the elastic strain energy associated ...

E. Salahi, F. Sakhaei, I. Mobasherpour, M. Eolya,

Up to now, lots of materials such as active carbon, iron, manganese, zirconium, and metal oxides have been widely used for removal of dyes from contaminated water. Among these, ferrite nanoparticle is an interesting magnetic material due to its moderate saturation magnetization, excellent chemical stability and mechanical hardness. Graphene, a new class of 2D carbonaceous material with atom thi...

Journal: :Chemical communications 2011
Sang Cheon Youn Dae Woo Kim Seung Bo Yang Hye Mi Cho Jae Hyun Lee Hee-Tae Jung

We developed a new method for fabricating reduced graphene oxide (RGO)/Fe-oxide structures from graphene oxide (GO), and for the simultaneous vertical alignment of the RGOs using a single-step process that involves a magnetic field and the fixation of the aligned structures by means of direct evaporation of the films.

Journal: :journal of chemical and petroleum engineering 0
zeinab salehi assistant professor, dept. of chemical eng., university of tehran, tehran, iran. bahareh kianpour m.sc. student, dept. of chemical eng., university of tehran, tehran, iran. akram ebrahimi m.sc. student, dept. of chemical eng., university of tehran, tehran, iran. shohreh fatemi professor, dept. of chemical eng., university of tehran, tehran, iran.

in this research graphene oxide was synthesized by two methods. these methods were achieved by changing the improved hummers’ and modified hummers’ methods. structure of graphene oxide was characterized by scanning electron microscopy (sem) images, x-ray diffraction (xrd) patterns, raman spectroscopy and fourier transform infrared (ftir) spectra. according to sem image, the thickness of graphen...

Journal: :Chemical communications 2015
Jiangyong Diao Hongyang Liu Jia Wang Zhenbao Feng Tong Chen Changxi Miao Weimin Yang Dang Sheng Su

Reduced porous graphene oxide as a metal free catalyst was selected for the oxidative dehydrogenation of ethylbenzene to styrene. It showed the best catalytic performance compared with other carbon materials (routinely reduced graphene oxide, graphite powder and oxidized carbon nanotubes) and commercial iron oxide.

ترکمن, مسعود, رسولی, رضا,

In this paper, we study the decorated graphene oxide with titanium dioxide nanoparticles. In order to produce this nanomaterial, the titanium dioxide nanoparticles were produced and anchored simultaneously on graphene oxide sheets by arc current. The morphology of the prepared samples was studied by scanning and tunneling electron microscopy, showing that nanoparticles were stabilized on the gr...

2014
Balasubramaniyan Rajagopalan Jin Suk Chung

An efficient active material for supercapacitor electrodes is prepared by reacting potassium hydroxide (KOH) with graphene oxide followed by chemical reduction with hydrazine. The electrochemical performance of KOH treated graphene oxide reduced for 24 h (reduced chemically modified graphene oxide, RCMGO-24) exhibits a specific capacitance of 253 F g(-1) at 0.2 A g(-1) in 2 M H2SO4 compared to ...

Journal: :international journal of environmental research 2015
s. pourmand m. abdouss a. m. rashidi

nanoporous graphene which is used as nanosorbent was synthesized by chemical vapor deposition method via porous zinc oxide nanocatalyst. the reaction was carried out using methane as the carbon source and hydrogen as the carrier gas in a ratio of 4:1 at the temperature ranging 900-1050°c for 2-50 min. the product was characterized by scanning electron microscopy, transmission electron microscop...

Journal: :Small 2013
Yang Wen Yujie Zhu Alex Langrock Ayyakkannu Manivannan Sheryl H Ehrman Chunsheng Wang

Silicon (Si) has been considered a very promising anode material for lithium ion batteries due to its high theoretical capacity. However, high-capacity Si nanoparticles usually suffer from low electronic conductivity, large volume change, and severe aggregation problems during lithiation and delithiation. In this paper, a unique nanostructured anode with Si nanoparticles bonded and wrapped by g...

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