Detail publikace

Structure and Photocatalytic Properties of Ni-, Co-, Cu-, and Fe-Doped TiO2 Aerogels

TINOCO NAVARRO, L. BEDNAŘÍKOVÁ, V. KAŠTYL, J. CIHLÁŘ, J.

Originální název

Structure and Photocatalytic Properties of Ni-, Co-, Cu-, and Fe-Doped TiO2 Aerogels

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

TiO2 aerogels doped with Ni, Co, Cu, and Fe were prepared, and their structure and photocatalytic activity during the decomposition of a model pollutant, acid orange (AO7), were studied. After calcination at 500 degrees C and 900 degrees C, the structure and composition of the doped aerogels were evaluated and analyzed. XRD analysis revealed the presence of anatase/brookite and rutile phases in the aerogels along with other oxide phases from the dopants. SEM and TEM microscopy showed the nanostructure of the aerogels, and BET analysis showed their mesoporosity and high specific surface area of 130 to 160 m2 g(-1). SEM-EDS, STEM-EDS, XPS, EPR methods and FTIR analysis evaluated the presence of dopants and their chemical state. The concentration of doped metals in aerogels varied from 1 to 5 wt.%. The photocatalytic activity was evaluated using UV spectrophotometry and photodegradation of the AO7 pollutant. Ni-TiO2 and Cu-TiO2 aerogels calcined at 500 degrees C showed higher photoactivity coefficients (kaap) than aerogels calcined at 900 degrees C, which were ten times less active due to the transformation of anatase and brookite to the rutile phase and the loss of textural properties of the aerogels.

Klíčová slova

aerogels; anatase; brookite; transition metal ions; photocatalytic properties

Autoři

TINOCO NAVARRO, L.; BEDNAŘÍKOVÁ, V.; KAŠTYL, J.; CIHLÁŘ, J.

Vydáno

24. 4. 2023

Nakladatel

MDPI

Místo

BASEL

ISSN

2310-2861

Periodikum

Gels

Ročník

9

Číslo

5

Stát

Švýcarská konfederace

Strany od

1

Strany do

21

Strany počet

21

URL

https://www.mdpi.com/2310-2861/9/5/357

Plný text v Digitální knihovně

http://hdl.handle.net/11012/244724

BibTex

@article{BUT185775,
  author="Lizeth Katherine {Tinoco Navarro} and Vendula {Bednaříková} and Jaroslav {Kaštyl} and Jaroslav {Cihlář}",
  title="Structure and Photocatalytic Properties of Ni-, Co-, Cu-, and Fe-Doped TiO2 Aerogels",
  journal="Gels",
  year="2023",
  volume="9",
  number="5",
  pages="21",
  doi="10.3390/gels9050357",
  issn="2310-2861",
  url="https://www.mdpi.com/2310-2861/9/5/357"
}