Enhanced photocatalytic activity of transparent carbon nanowall/TiO2 heterostructures

Mattia Pierpaoli , Aneta Lewkowicz , Michał Rycewicz , Karol Szczodrowski , Maria Letizia Ruello , Robert Bogdanowicz

Abstract

The synthesis of novel tunable carbon-based nanostructure represented a pivotal point to enhance theefficiency of existing photocatalysts and to extend their applicability to a wider number of sustainableprocesses.In this letter, we describe a transparent photocatalytic heterostructure by growing boron-doped carbonnanowalls (B-CNWs) on quartz, followed by a simple TiO2sol-gel deposition. The effect on the thicknessand boron-doping in the B-CNWs layer was studied, and the photocatalytic removal of nitrogen oxides(NOx) measured.Our results show that TiO2, in the anatase form, was uniformly deposited on the carbon nanowall layer.The underlying carbon nanowall layer played a double role in the heterostructure: it both affects the crys-tallinity of the TiO2and promotes the separation of the photoexcited electron-holes, by increasing thenumber of contact points between the two layers. In summary, the combination of B-CNWs with TiO2can enhance the separation of the electron–hole photogenerated charges, due to the peculiar CNWsmaze-like structure.
Author Mattia Pierpaoli
Mattia Pierpaoli,,
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, Aneta Lewkowicz (FMPI/IEP)
Aneta Lewkowicz,,
- Institute of Experimental Physics
, Michał Rycewicz
Michał Rycewicz,,
-
, Karol Szczodrowski (FMPI/IEP)
Karol Szczodrowski,,
- Institute of Experimental Physics
, Maria Letizia Ruello
Maria Letizia Ruello,,
-
, Robert Bogdanowicz
Robert Bogdanowicz,,
-
Journal seriesMaterials Letters, ISSN 0167-577X, e-ISSN 1873-4979, (N/A 70 pkt)
Issue year2020
Vol262
Pages1-4
Publication size in sheets0.50
Article number127155
Keywords in EnglishTiO2, carbon nanowalls, carbon materials, nanocomposites
ASJC Classification2210 Mechanical Engineering; 2211 Mechanics of Materials; 2500 General Materials Science; 3104 Condensed Matter Physics
DOIDOI:10.1016/j.matlet.2019.127155
URL https://doi.org/10.1016/j.matlet.2019.127155
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 27-05-2020, ArticleFromJournal
Publication indicators WoS Citations = 0.000; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.887; WoS Impact Factor: 2018 = 3.019 (2) - 2018=2.624 (5)
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