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

doi:10.1039/c3nr01280h

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 journal › Article › peer-review

168 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 (E_g = 2.85 eV) compared to the unmodified white Degussa TiO₂ (E_g = 3.10 eV).

Original language	English
Pages (from-to)	6323-6326
Number of pages	4
Journal	Nanoscale
Volume	5
Issue number	14
DOIs	https://doi.org/10.1039/c3nr01280h
Publication status	Published - 21 Jul 2013
Externally published	Yes

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

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).",

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AU - Kalathil, Shafeer

AU - Khan, Mohammad Mansoob

AU - Ansari, Sajid Ali

AU - Lee, Jintae

AU - Cho, Moo Hwan

PY - 2013/7/21

Y1 - 2013/7/21

N2 - 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).

AB - 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).

UR - https://www.scopus.com/pages/publications/84879864585

U2 - 10.1039/c3nr01280h

DO - 10.1039/c3nr01280h

M3 - Article

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SN - 2040-3364

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EP - 6326

JO - Nanoscale

JF - Nanoscale

IS - 14

ER -

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

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