Hierarchically Self-assembled Super Structural TiO 2 Microspheres: Enhanced Excitonic Efficiency as Photocatalyst and Ph
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Hierarchically Self-assembled Super Structural TiO2 Microspheres: Enhanced Excitonic Efciency as Photocatalyst and Photoanode Material Arunkumar Shanmugasundaram, Pratyay Basak and Sunkara V. Manorama MRS Advances / FirstView Article / June 2016, pp 1 - 6 DOI: 10.1557/adv.2015.23, Published online: 22 December 2015
Link to this article: http://journals.cambridge.org/abstract_S2059852115000237 How to cite this article: Arunkumar Shanmugasundaram, Pratyay Basak and Sunkara V. Manorama Hierarchically Self-assembled Super Structural TiO2 Microspheres: Enhanced Excitonic Efciency as Photocatalyst and Photoanode Material. MRS Advances, Available on CJO 2015 doi:10.1557/adv.2015.23 Request Permissions : Click here
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MRS Advances © 2015 Materials Research Society DOI: 10.1557/adv.2015.23
Hierarchically Self-assembled Super Structural TiO2 Microspheres: Enhanced Excitonic Efficiency as Photocatalyst and Photoanode Material Arunkumar Shanmugasundaram, Pratyay Basak, and Sunkara V. Manorama* Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. 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. INTRODUCTION Owing to its unique physico-chemical and opto-electronic properties TiO2 is considered as, one of the most important metal oxide semiconductors and its potential has been suitably demonstrated in several applications [1]. Over the years several form of TiO2 hierarchical architectures have been reported. However, the development of facile and effective methods for creating novel super structural architectures which can perform better than the existing materials is a topic of research
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