Počet záznamů: 1
Preparation of graphene by using an intense cavitation field in a pressurized ultrasonic reactor
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SYSNO ASEP 0382567 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Preparation of graphene by using an intense cavitation field in a pressurized ultrasonic reactor Tvůrce(i) Štengl, Václav (UACH-T) RID, ORCID, SAI Zdroj.dok. Chemistry - A European Journal. - : Wiley - ISSN 0947-6539
Roč. 18, č. 44 (2012), s. 14047-14054Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova cavitation field ; graphene ; nanostructures ; ultrasound ; X-ray diffraction Vědní obor RIV CA - Anorganická chemie Institucionální podpora UACH-T - RVO:61388980 UT WOS 000310473900020 DOI https://doi.org/10.1002/chem.201201411 Anotace A new and efficient method to produce a large quantity of high-quality and non-oxidized graphene flakes from powdered natural graphite by using a high-intensity cavitation field in a pressurized ultrasonic reactor is demonstrated. TEM and selected-area electron diffraction (SAED) confirmed the ordered graphite crystal structure of graphene. Atomic force microscopy (AFM) was used to examine the thickness of the graphene sheets. The delamination (exfoliation) of natural graphite in the liquid phase depends on the physical effects of ultrasound, which break down the 3D graphite structure into a 2D graphene structure. The prepared graphene is of high purity and without defects because no strongly oxidizing chemicals are used and no toxic products result. TEM shows that graphene nanosheets were produced with sizes in the range of tens to hundreds of square nanometers; these nanosheets were smooth and without any ripples and corrugations. High-resolution TEM (HRTEM) and SAED analysis confirmed that the products were graphene nanosheets. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2013
Počet záznamů: 1