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Royal Society of Chemistry, Nanoscale, 14(5), p. 6323, 2013

DOI: 10.1039/c3nr01280h

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

Journal article published in 2013 by Shafeer Kalathil, Mohammad Mansoob Khan ORCID, Sajid Ali Ansari, Jintae Lee, Moo Hwan Cho
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This paper is available in a repository.

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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).