Photoluminescence and electroluminescence at the TiO2—electrolyte interface

TiO2‐Based Composite Nanotube Arrays Prepared via Layer‐by‐Layer Assembly

“…7, curve a). The former peak is in agreement with spectra obtained for bulk TiO 2 powder and originates from photon repetitions of the free exciton of TiO 2 crystallines, [24] whereas the latter is similar to another type of band-to-band transition observed in nanometer-sized TiO 2 colloids. [23] For the TiO 2 ±CdS composite nanotubes, a striking PL peak at 378 nm is observed, in addition to the double PL peak mentioned above (Fig.…”

Photoluminescence Spectroscopic Studies on TiO2 Photocatalyst

“…In the photoluminescence spectra of rutile electrode in aqueous electrolyte solutions, the near-infrared luminescence band was attributed to the intermediate species generated during the photooxidation reaction of water (Nakato et al 1983(Nakato et al , 1986(Nakato et al , 1997. On the contrary, Poznyak et al (1992) proposed that the nearinfrared band was associated with the luminescence centers of the intrinsic defects in TiO 2 , which shows more characteristic features of the rutile lattice other than anatase lattice.…”

“…The photoluminescence wavelength of TiO 2 depends on its crystal structure and its particle size, while the photoluminescence intensity depends on the dopants, annealing temperatures and atmospheric conditions during the crystallization of TiO 2 , and the ambient temperature and atmospheric environments during the photoluminescence measurements. The main features of TiO 2 are the broad and structureless visible or near-infrared luminescence bands (Anpo et al 1985a(Anpo et al , b, 1989(Anpo et al , 1991Serpone et al 1995;Tang et al 1993Tang et al , 1994bZhang et al 2000a, b;Montoncello et al 2003;Mochizuki et al 2003;Poznyak et al 1992;Hachiya and Kondoh 2003;Nakato et al 1983Nakato et al , 1986Nakato et al , 1997Grabner et al 1970;Ghosh et al 1969;Fernández et al 2005;Plugaru et al 2004;de Haart and Blasse 1986;Forss and Schubnell 1993;Lei et al 2001;Qian et al 2005;Knorr et al 2008).…”

“…It is well known that the photocatalytic activity of TiO 2 largely depends on its crystal structure (Tsai and Cheng 1997;Tanaka et al 1991;Nishimoto et al 1985;Ding et al 2000;Ohno et al 2001;Fujihara et al 1998) and surface properties (Anpo et al 1989;Yu et al 2000;Wu et al 2004), etc. The crystal structures (Tang et al 1994a;Poznyak et al 1992;Montoncello et al 2003;Nakajima et al 2005) and the surface properties (Anpo et al 1989;Nakajima et al 2002 of TiO 2 also have essential correlation with the luminescence features of TiO 2 . Therefore, photoluminescence spectroscopy study can depict the surface photoactive sites of TiO 2 (Anpo et al 1985a;Nakajima et al 2001Nakajima et al , 2002Jung et al 2005).…”

Influence of Polarization Processes on the Morphology and Photoluminescence Properties of PP/TiO2 Polymer Nanocomposites

“…Furthermore, TiO 2 reveals photoluminescence at ambient temperature or below under various conditions [2][3][4]. Titanium dioxide also shows electroluminescence with a spectral distribution below the band gap, i.e., luminescence also occurs from levels within the bandgap.…”