title
  

Core-crown quantum nanoplatelets with favorable type-II heterojunctions boost charge separation and photocatalytic NO oxidation on TiO2

Warning The system is temporarily closed to updates for reporting purpose.

Ebrahimi, Elnaz and Irfan, Muhammad and Shabani, Farzan and Kocak, Yusuf and Karakurt, Bartu and Erdem, Emre and Demir, Hilmi Volkan and Ozensoy, Emrah (2020) Core-crown quantum nanoplatelets with favorable type-II heterojunctions boost charge separation and photocatalytic NO oxidation on TiO2. ChemCatChem, 12 (24). pp. 6329-6343. ISSN 1867-3880 (Print) 1867-3899 (Online)

[img]PDF - Registered users only - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
7Mb

Official URL: http://dx.doi.org/10.1002/cctc.202000749

Abstract

Functionalization of TiO2 (P25) with oleic acid-capped CdSe(core)/CdSeTe(crown) quantum-well nanoplatelets (NPL) yielded remarkable activity and selectivity toward nitrate formation in photocatalytic NOx oxidation and storage (PHONOS) under both ultraviolet (UV-A) and visible (VIS) light irradiation. In the NPL/P25 photocatalytic system, photocatalytic active sites responsible for the NO(g) photo-oxidation and NO2 formation reside mostly on titania, while the main function of the NPL is associated with the photocatalytic conversion of the generated NO2 into the adsorbed NO3- species, significantly boosting selectivity toward NOx storage. Photocatalytic improvement in NOx oxidation and storage upon NPL functionalization of titania can also be associated with enhanced electron-hole separation due to a favorable Type-II heterojunction formation and photo-induced electron transfer from the CdSeTe crown to the CdSe core of the quantum well system, where the trapped electrons in the CdSe core can later be transferred to titania. Re-usability of NPL/P25 system was also demonstrated upon prolonged use of the photocatalyst, where NPL/P25 catalyst surpassed P25 benchmark in all tests.

Item Type:Article
Uncontrolled Keywords:Photocatalytic NOx abatement, PHONOS, DeNO(x, titanium dioxide CdSe, CdSeTe nanoplatelets, quantum-wells
Subjects:Q Science > QC Physics > QC176-176.9 Solids. Solid state physics
ID Code:41856
Deposited By:Emre Erdem
Deposited On:25 Aug 2021 16:50
Last Modified:25 Aug 2021 16:50

Repository Staff Only: item control page