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

Shafeer Kalathil, Mohammad Mansoob Khan, Sajid Ali Ansari, Jintae Lee, Moo Hwan Cho*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

137 Citations (Scopus)

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).

Original languageEnglish
Pages (from-to)6323-6326
Number of pages4
JournalNanoscale
Volume5
Issue number14
DOIs
Publication statusPublished - 21 Jul 2013
Externally publishedYes

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