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Hierarchically Self-assembled Super Structural TiO2 Microspheres: Enhanced Excitonic Efficiency as Photocatalyst and Photoanode Material

Published online by Cambridge University Press:  22 December 2015

Arunkumar Shanmugasundaram ,
Pratyay Basak  and
Sunkara V. Manorama
Arunkumar Shanmugasundaram
Affiliation:
Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
Pratyay Basak
Affiliation:
Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
Sunkara V. Manorama*
Affiliation:
Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
*
*(Email: [email protected])
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Abstract

Complex three-dimensional (3-D) super structural TiO2 architectures with controlled shape and size were synthesized by a facile hydrothermal synthesis route by using titanium tetrachloride (TiCl4) as the metal precursor and hydrochloric acid (HCl)/ammonium chloride (NH4Cl) as the mineralizer/structure directing agent. Several interesting hierarchical architectures like: (i) nanoparticles assembled spheres (NPAS), (ii) nanowires assembled spheres (NWAS), (iii) nanorods assembled spheres (NRAS), and (iv) nanosheets assembled spheres (NSAS) were achieved by the controlled variation of crystal structure modifier. The synthesized materials were characterised in detail by different analytical techniques and the findings are consistent. To demonstrate the superior performances of the as prepared materials the photocatalytic and photo-voltaic performances were investigated. The results demonstrate that these synthesized materials exhibits enhanced photocatalytic activity (efficiency is ∼ 91%) towards the degradation of RhB and as a photoanode in DSSCs the maximum energy conversion efficiency is ∼5%, attributed primarily to the unique hierarchical mesoporous structure of the TiO2 architectures.

Keywords

nanostructurechemical synthesisphotovoltaic
Type
Articles
Information
MRS Advances , Volume 1 , Issue 59: Energy and Sustainability , 2016 , pp. 3877 - 3882
Copyright
Copyright © Materials Research Society 2015 

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