The Influence of Oxygen Concentration during MAX Phases (Ti3AlC2) Preparation on the -Al2O3 Microparticles Content and Specific Surface Area of Multilayered MXenes (Ti3C2Tx)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73597971" target="_blank" >RIV/61989592:15310/19:73597971 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1944/12/3/353/htm" target="_blank" >https://www.mdpi.com/1996-1944/12/3/353/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma12030353" target="_blank" >10.3390/ma12030353</a>

Result language

angličtina

Original language name

The Influence of Oxygen Concentration during MAX Phases (Ti3AlC2) Preparation on the -Al2O3 Microparticles Content and Specific Surface Area of Multilayered MXenes (Ti3C2Tx)

Original language description

The high specific surface area of multilayered two-dimensional carbides called MXenes, is a critical feature for their use in energy storage systems, especially supercapacitors. Therefore, the possibility of controlling this parameter is highly desired. This work presents the results of the influence of oxygen concentration during Ti3AlC2 ternary carbideMAX phase preparation on -Al2O3 particles content, and thus the porosity and specific surface area of the Ti3C2Tx MXenes. In this research, three different Ti3AlC2 samples were prepared, based on TiC-Ti2AlC powder mixtures, which were conditioned and cold pressed in argon, air and oxygen filled glove-boxes. As-prepared pellets were sintered, ground, sieved and etched using hydrofluoric acid. The MAX phase and MXene samples were analyzed using scanning electron microscopy and X-ray diffraction. The influence of the oxygen concentration on the MXene structures was confirmed by Brunauer-Emmett-Teller surface area determination. It was found that oxygen concentration plays an important role in the formation of -Al2O3 inclusions between MAX phase layers. The mortar grinding of the MAX phase powder and subsequent MXene fabrication process released the -Al2O3 impurities, which led to the formation of the porous MXene structures. However, some non-porous -Al2O3 particles remained inside the MXene structures. Those particles were found ingrown and irremovable, and thus decreased the MXene specific surface area.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

3

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

"353-1"-"353-11"

UT code for WoS article

000460768000022

EID of the result in the Scopus database

2-s2.0-85060446286