alpha-Fe2O3 Nanoparticles/Iron-Containing Vermiculite Composites: Structural, Textural, Optical and Photocatalytic Properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10249982" target="_blank" >RIV/61989100:27360/22:10249982 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27710/22:10249982

Výsledek na webu

<a href="https://www.webofscience.com/wos/woscc/full-record/WOS:000802637600001" target="_blank" >https://www.webofscience.com/wos/woscc/full-record/WOS:000802637600001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/min12050607" target="_blank" >10.3390/min12050607</a>

Jazyk výsledku

angličtina

Název v původním jazyce

alpha-Fe2O3 Nanoparticles/Iron-Containing Vermiculite Composites: Structural, Textural, Optical and Photocatalytic Properties

Popis výsledku v původním jazyce

Vermiculite two-dimensional mixed-layer interstratified structures are a very attractive material for catalysis and photocatalysis. The iron-containing vermiculite from the Palabora region (South Africa) and its samples, which calcined at 500 and 700 degrees C, were studied in comparison with the alpha-Fe2O3 nanoparticles/vermiculite composites for the first time as photocatalysts of methanol decomposition, which is an organic pollutant and an efficient source for hydrogen production. The aim of the work was to characterize their structural properties using X-ray fluorescence, X-ray diffraction, infrared spectroscopy, nitrogen physisorption, diffuse reflectance UV-Vis spectroscopy and photoluminescence spectroscopy to explain the photocatalytic effects. The photocatalytic test of the samples was performed in a batch photoreactor under UV radiation of an 8W Hg lamp. The photocatalytic activity of vermiculite-hydrobiotite-mica-like layers at different water hydration states in the interstratified structure and the substitution ratio of Fe(III)/Al in tetrahedra can initiate electrons and h holes on the surface that attack the methanol in redox processes. The activity of alpha-Fe2O3 nanoparticle photocatalysts stems from a larger crystallite size and surface area. The hydrogen production from the methanol-water mixture in the presence of vermiculites and alpha-Fe2O3 nanoparticles/vermiculite composites was very similar and higher than the yield produced by the commercial TiO2 photocatalyst Evonik P25 (H-2 = 1052 mu mol/g(cat.)). The highest yield of hydrogen was obtained in the presence of the Fe/V-700 composite (1303 mu mol/g(cat) after 4 h of irradiation).

Název v anglickém jazyce

alpha-Fe2O3 Nanoparticles/Iron-Containing Vermiculite Composites: Structural, Textural, Optical and Photocatalytic Properties

Popis výsledku anglicky

Vermiculite two-dimensional mixed-layer interstratified structures are a very attractive material for catalysis and photocatalysis. The iron-containing vermiculite from the Palabora region (South Africa) and its samples, which calcined at 500 and 700 degrees C, were studied in comparison with the alpha-Fe2O3 nanoparticles/vermiculite composites for the first time as photocatalysts of methanol decomposition, which is an organic pollutant and an efficient source for hydrogen production. The aim of the work was to characterize their structural properties using X-ray fluorescence, X-ray diffraction, infrared spectroscopy, nitrogen physisorption, diffuse reflectance UV-Vis spectroscopy and photoluminescence spectroscopy to explain the photocatalytic effects. The photocatalytic test of the samples was performed in a batch photoreactor under UV radiation of an 8W Hg lamp. The photocatalytic activity of vermiculite-hydrobiotite-mica-like layers at different water hydration states in the interstratified structure and the substitution ratio of Fe(III)/Al in tetrahedra can initiate electrons and h holes on the surface that attack the methanol in redox processes. The activity of alpha-Fe2O3 nanoparticle photocatalysts stems from a larger crystallite size and surface area. The hydrogen production from the methanol-water mixture in the presence of vermiculites and alpha-Fe2O3 nanoparticles/vermiculite composites was very similar and higher than the yield produced by the commercial TiO2 photocatalyst Evonik P25 (H-2 = 1052 mu mol/g(cat.)). The highest yield of hydrogen was obtained in the presence of the Fe/V-700 composite (1303 mu mol/g(cat) after 4 h of irradiation).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/EF17_049%2F0008419" target="_blank" >EF17_049/0008419: Podpora mezisektorové spolupráce v oblasti snižování polutantů v životním prostředí a využití odpadů</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Minerals

ISSN

2075-163X

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

nestrankovano

Kód UT WoS článku

000802637600001

EID výsledku v databázi Scopus

—