TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: Widely employed still an ambiguous system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F23%3A10252989" target="_blank" >RIV/61989100:27710/23:10252989 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S1010603023004859" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S1010603023004859</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2023.115020" target="_blank" >10.1016/j.jphotochem.2023.115020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: Widely employed still an ambiguous system

Popis výsledku v původním jazyce

Clean energy, as well as air and water pollution, have emerged as significant challenges in today&apos;s society. Photocatalysis offers a potential solution to address these issues. It is an advanced oxidation process that utilises light to activate a semiconductor. Among photocatalytically active materials, titanium dioxide (TiO2) semiconductors are widely recognised. However, the performance of TiO2 is hindered by its wide band gap (TILDE OPERATOR+D913.2 eV) and high recombination rate of photo-generated electron-hole (eMINUS SIGN MINUS SIGN h+) pairs. To overcome these limitations, TiO2 in heterojunction with tungsten trioxide (WO3) has gained substantial attention for various photocatalytic applications. However, the literature reports contradictory behaviours due to variations in synthesis techniques and photocatalytic applications. In this study, we extensively investigated the photocatalytic properties of the TiO2/WO3 system for the removal of gaseous benzene, and H2 generation. To enhance the transport and lifetime of photo-generated excitons, graphene nanoplatelets were incorporated into the TiO2/WO3 system. We examined several parameters that influenced the photocatalytic activity of the synthesised materials, including the WO3 to TiO2 ratio, the presence of graphene, and the specific photocatalytic application. Interestingly, the position of the conduction bands played a crucial role in hydrogen generation. The TiO2/WO3 system exhibited a type-II heterojunction. While the hybridisation of TiO2 with WO3 was found to be detrimental to light-induced benzene removal and H2 generation, the modification of TiO2/WO3 with graphene nanoplatelets significantly improved the photocatalytic hydrogen generation. Notably, the specimen with 15 mol% WO3 and 1 wt% graphene demonstrated a five-fold increase in yield compared to its counterpart without graphene. These findings provide valuable insights for data-driven catalysis research. (C) 2023

Název v anglickém jazyce

TiO2/WO3/graphene for photocatalytic H2 generation and benzene removal: Widely employed still an ambiguous system

Popis výsledku anglicky

Clean energy, as well as air and water pollution, have emerged as significant challenges in today&apos;s society. Photocatalysis offers a potential solution to address these issues. It is an advanced oxidation process that utilises light to activate a semiconductor. Among photocatalytically active materials, titanium dioxide (TiO2) semiconductors are widely recognised. However, the performance of TiO2 is hindered by its wide band gap (TILDE OPERATOR+D913.2 eV) and high recombination rate of photo-generated electron-hole (eMINUS SIGN MINUS SIGN h+) pairs. To overcome these limitations, TiO2 in heterojunction with tungsten trioxide (WO3) has gained substantial attention for various photocatalytic applications. However, the literature reports contradictory behaviours due to variations in synthesis techniques and photocatalytic applications. In this study, we extensively investigated the photocatalytic properties of the TiO2/WO3 system for the removal of gaseous benzene, and H2 generation. To enhance the transport and lifetime of photo-generated excitons, graphene nanoplatelets were incorporated into the TiO2/WO3 system. We examined several parameters that influenced the photocatalytic activity of the synthesised materials, including the WO3 to TiO2 ratio, the presence of graphene, and the specific photocatalytic application. Interestingly, the position of the conduction bands played a crucial role in hydrogen generation. The TiO2/WO3 system exhibited a type-II heterojunction. While the hybridisation of TiO2 with WO3 was found to be detrimental to light-induced benzene removal and H2 generation, the modification of TiO2/WO3 with graphene nanoplatelets significantly improved the photocatalytic hydrogen generation. Notably, the specimen with 15 mol% WO3 and 1 wt% graphene demonstrated a five-fold increase in yield compared to its counterpart without graphene. These findings provide valuable insights for data-driven catalysis research. (C) 2023

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

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

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Photochemistry and Photobiology A: Chemistry

ISSN

1010-6030

e-ISSN

1873-2666

Svazek periodika

445

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

001123745400001

EID výsledku v databázi Scopus

2-s2.0-85165351222