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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU149878" target="_blank" >RIV/00216305:26620/23:PU149878 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2310-2861/9/5/357" target="_blank" >https://www.mdpi.com/2310-2861/9/5/357</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/gels9050357" target="_blank" >10.3390/gels9050357</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LTC20019" target="_blank" >LTC20019: New multi-component aerogels for environmental catalysis</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Gels

ISSN

2310-2861

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

21

Strana od-do

1-21

Kód UT WoS článku

001011283100001

EID výsledku v databázi Scopus

2-s2.0-85160307893