Author details

This technique sheds light on tracking the fabrication of light-emitting devices with spatially

Figure 12. 2D XANES-XEOL plot of TiO2 hierarchical structures annealed at different temperatures.

TiO2 NT can also serve as a substrate for nanoparticle deposition. Noble metal loaded TiO2 NT has been used in photocatalysis [42, 43] because the electron-hole recombination in TiO2 can be effectively retarded with the presence of noble metal, leading to an enhanced photocatalytic efficiency [44]. The role of noble metal nanoparticles in modifying electronic structure of TiO2 is investigated using XEOL-XANES. An example shows the study of Pd nanoparticles (PdNP) loaded TiO2 NT compared with pristine TiO2 NT [19]. PdNP is deposited on TiO2 NT by

Upon coating, the luminescence of TiO2 NT changes. XEOL spectra, recorded with excitation energy above the O K-edge, are shown in Figure 13b. A decrease in intensity and a slight shift

Figure 13. (a) The morphology of TiO2NT after Pd deposition. (b) XEOL of TiO2 NT with and without Pd nanoparticlet

hydrothermal method, and the morphology is shown in Figure 13a.

separated luminescence.

204 Titanium Dioxide - Material for a Sustainable Environment

coating. (Adapted from Ref. [39]).

Lijia Liu<sup>1</sup> and Tsun-Kong Sham<sup>2</sup> \*

\*Address all correspondence to: tsham@uwo.ca

1 Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials, Soochow University, Suzhou, Jiangsu, China

2 Department of Chemistry, University of Western Ontario, London, ON, Canada
