Size- and density-controlled photodeposition of metallic platinum nanoparticles on titanium dioxide for photocatalytic applications

Camilla Tossi,Ilkka Tittonen,Erich See,Jorma Selin,Marko Vaelma,Lassi Hällström,Jouko Lahtinen

doi:10.1039/c8ta09037h

Abstract

Comprehensive multi-parameter study for a reliable photodeposition of co-catalyst nanoparticles on titanium dioxide.

Highlights

Since its water-splitting properties have been demonstrated by the pioneering work by Fujishima and Honda,[1] titanium dioxide has been exhaustively studied[2] to assess its photocatalytic properties
The applicability of TiO2 is limited by its wide bandgap, which prevents the full exploitation of sunlight as a photocatalytic force,[11,12] and by the high recombination rate of charge carriers,[13] which prevents efficient charge transfer to other media
The pH of the precursor solution affects the reaction kinetics: a basic or neutral solution favors the formation of metal oxides,[42,43] while a pH lower than the isoelectric point (IEP) of TiO2 makes the surface adsorb positively charged ions[44] such as H+, attracting the platinum hexachloride ions to bond to the surface

Summary

Introduction

Since its water-splitting properties have been demonstrated by the pioneering work by Fujishima and Honda,[1] titanium dioxide has been exhaustively studied[2] to assess its photocatalytic properties.

Results

Conclusion