Publication detail

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

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

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

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.

Keywords

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

Authors

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

Released

24. 4. 2023

Publisher

MDPI

Location

BASEL

ISBN

2310-2861

Periodical

Gels

Year of study

9

Number

5

State

Swiss Confederation

Pages from

1

Pages to

21

Pages count

21

URL

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

Full text in the Digital Library

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"
}