Photocatalytic hydrogen generation from water using a hybrid of graphene nanoplatelets and self doped TiO2-Pd

Sayed, Farheen N., Sasikala, R., Jayakumar, O. D., Rao, R., Betty, C. A., Chokkalingam, Anand, Kadam, R. M., Jagannath, J., Bharadwaj, S. R., Vinu, Ajayan and Tyagi, A. K. (2014) Photocatalytic hydrogen generation from water using a hybrid of graphene nanoplatelets and self doped TiO2-Pd. RSC Advances, 4 26: 13469-13476. doi:10.1039/c3ra47974a


Author Sayed, Farheen N.
Sasikala, R.
Jayakumar, O. D.
Rao, R.
Betty, C. A.
Chokkalingam, Anand
Kadam, R. M.
Jagannath, J.
Bharadwaj, S. R.
Vinu, Ajayan
Tyagi, A. K.
Title Photocatalytic hydrogen generation from water using a hybrid of graphene nanoplatelets and self doped TiO2-Pd
Formatted title
Photocatalytic hydrogen generation from water using a hybrid of graphene nanoplatelets and self doped TiO2-Pd
Journal name RSC Advances   Check publisher's open access policy
ISSN 2046-2069
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1039/c3ra47974a
Open Access Status Not Open Access
Volume 4
Issue 26
Start page 13469
End page 13476
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher R S C Publications
Collection year 2015
Language eng
Formatted abstract
Nanohybrids of self doped (Ti3+ doped or reduced TiO 2-TiO2R) TiO2-graphene nanoplatelets (TiO 2R-G) of different compositions are synthesized by a facile soft chemical method. A decrease of bandgap and improved visible light absorption is exhibited by TiO2R-G. Based on current-voltage (I-V) measurements, it is concluded that the hybrid material possesses improved electron transport properties compared to TiO2R and pure TiO2. A detailed characterization of the composites indicated that TiO2R exists as a dispersed phase on graphene nanoplatelets (graphene). Among different compositions of the composites, the catalyst containing 3 weight% of graphene (TiO2R-3G) shows enhanced photocatalytic activity for hydrogen generation from water compared to both TiO2 and TiO2R. When Pd is used as co-catalyst in this composite, a large increase in the activity is observed. The increased efficiency of the nanocomposite is attributed to factors like: (i) improved visible light absorption promoted by G and Ti3+ dopant (ii) increased lifetime of the charge carriers assisted by the enhanced electron transporting properties of G (iii) increased number of active sites for hydrogen evolution provided by the Pd co-catalyst. This work highlights the role of TiO2 based hybrid materials as efficient photocatalysts for solar energy utilization. 
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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