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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/EF17_049%2F0008419" target="_blank" >EF17_049/0008419: Support of cross-sectoral cooperation in the field of environmental pollutants reduction and waste recovery</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Journal of Photochemistry and Photobiology A: Chemistry

ISSN

1010-6030

e-ISSN

1873-2666

Volume of the periodical

445

Issue of the periodical within the volume

November

Country of publishing house

CH - SWITZERLAND

Number of pages

10

Pages from-to

—

UT code for WoS article

001123745400001

EID of the result in the Scopus database

2-s2.0-85165351222