Issue 14, 2013
From the journal:

Nanoscale

Band gap narrowing of titanium dioxide (TiO2) nanocrystals by electrochemically active biofilms and their visible light activity

Shafeer Kalathil,a   Mohammad Mansoob Khan,a   Sajid Ali Ansari,a   Jintae Leea  and  Moo Hwan Cho*a  

* Corresponding authors

a School of Chemical Engineering, Yeungnam University, Gyeongsan-si, Gyeongbuk 712-749, South Korea
E-mail: mhcho@ynu.ac.kr
Fax: +82-53-810-4631
Tel: +82-53-810-2517

Abstract

We report a simple biogenic-route to narrow the band gap of TiO2 nanocrystals for visible light application by offering a greener method. When an electrochemically active biofilm (EAB) was challenged with a solution of Degussa-TiO2 using sodium acetate as the electron donor, greyish blue-colored TiO2 nanocrystals were obtained. A band gap study showed that the band gap of the modified TiO2 nanocrystals was significantly reduced (Eg = 2.85 eV) compared to the unmodified white Degussa TiO2 (Eg = 3.10 eV).

Graphical abstract: Band gap narrowing of titanium dioxide (TiO2) nanocrystals by electrochemically active biofilms and their visible light activity

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Article information

DOI
https://doi.org/10.1039/C3NR01280H
Article type
Communication
Submitted
15 Mar 2013
Accepted
17 May 2013
First published
21 May 2013

Nanoscale, 2013,5, 6323-6326

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Band gap narrowing of titanium dioxide (TiO2) nanocrystals by electrochemically active biofilms and their visible light activity

S. Kalathil, M. M. Khan, S. A. Ansari, J. Lee and M. H. Cho, Nanoscale, 2013, 5, 6323 DOI: 10.1039/C3NR01280H

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