Enhanced photocatalytic activity of transparent carbon nanowall/TiO2 heterostructures
Mattia Pierpaoli , Aneta Lewkowicz , Michał Rycewicz , Karol Szczodrowski , Maria Letizia Ruello , Robert Bogdanowicz
AbstractThe 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.
|Journal series||Materials Letters, ISSN 0167-577X, e-ISSN 1873-4979, (N/A 70 pkt)|
|Publication size in sheets||0.50|
|Keywords in English||TiO2, carbon nanowalls, carbon materials, nanocomposites|
|ASJC Classification||; ; ;|
|Score||= 70.0, 27-05-2020, ArticleFromJournal|
|Publication indicators||= 0.000; : 2017 = 0.887; : 2018 = 3.019 (2) - 2018=2.624 (5)|
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