New evidence for the photocatalytic efficiency of natural raw vermiculites to produce hydrogen from aqueous methanol solution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F25%3A00638512" target="_blank" >RIV/68145535:_____/25:00638512 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.heliyon.2025.e42366" target="_blank" >https://doi.org/10.1016/j.heliyon.2025.e42366</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.heliyon.2025.e42366" target="_blank" >10.1016/j.heliyon.2025.e42366</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New evidence for the photocatalytic efficiency of natural raw vermiculites to produce hydrogen from aqueous methanol solution

Popis výsledku v původním jazyce

The potential of vermiculites as environmentally friendly photocatalysts for hydrogen production and pollutant degradation was demonstrated by a photocatalytic test in an 50 % aqueous methanol solution. After 4 h of irradiation with the commercial TiO2 Evonik P25 catalyst, the hydrogen yield was of 656.9 ± 4.2 μmol/gcat. For vermiculites Vm1, Vm3, and Vm4, hydrogen yields were comparable, but were lower in the presence of vermiculite-chlorite intermediate Vm2 (H₂ = 385.1 ± 6.6 μmol/gcat). After the extended 24-h irradiation, hydrogen yield was promoted by the negative tetrahedral charge, while the positive octahedral charge inhibited the photocatalytic decomposition of the aqueous methanol solution into hydrogen in favor of the formation of CO and CH4 byproducts. The decrease in methanol yield was effectively assessed by the shift of the C–O and C–H bands in the Raman spectrum, corresponding to thenphotocatalytic production of H2.n

Název v anglickém jazyce

New evidence for the photocatalytic efficiency of natural raw vermiculites to produce hydrogen from aqueous methanol solution

Popis výsledku anglicky

The potential of vermiculites as environmentally friendly photocatalysts for hydrogen production and pollutant degradation was demonstrated by a photocatalytic test in an 50 % aqueous methanol solution. After 4 h of irradiation with the commercial TiO2 Evonik P25 catalyst, the hydrogen yield was of 656.9 ± 4.2 μmol/gcat. For vermiculites Vm1, Vm3, and Vm4, hydrogen yields were comparable, but were lower in the presence of vermiculite-chlorite intermediate Vm2 (H₂ = 385.1 ± 6.6 μmol/gcat). After the extended 24-h irradiation, hydrogen yield was promoted by the negative tetrahedral charge, while the positive octahedral charge inhibited the photocatalytic decomposition of the aqueous methanol solution into hydrogen in favor of the formation of CO and CH4 byproducts. The decrease in methanol yield was effectively assessed by the shift of the C–O and C–H bands in the Raman spectrum, corresponding to thenphotocatalytic production of H2.n

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Heliyon

ISSN

2405-8440

e-ISSN

2405-8440

Svazek periodika

11

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

e42366

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85217656951