Materials characterization of TiO₂ nanotubes decorated by Au nanoparticles for photoelectrochemical applications

Abstract

The structural and chemical modification of TiO2 NTs by the deposition of a well-controlled Au deposit (0.01 mg cm−1) was investigated using a combination of microscopic (SEM, STEM), analytical measurements (XPS, SERS, UV-Vis, XRD) and photoelectrochemical investigations.

Black TiO2 Nanotube Array/BiVO4 Heterojunction Photocatalysts for Tetracycline Removal with High Solution Detoxification Efficiency

“…Figure b shows the high-resolution Ti 2p spectra of the synthesized W-TiO 2 , B-TiO 2 , and heterojunction photocatalysts. For W-TiO 2 , two peaks located at 459.6 and 465.5 eV are assigned to Ti 2p 3/2 and Ti 2p 1/2 , which are in agreement with reported values for TiO 2 nanotubes . As seen for B-TiO 2 , the Ti 2p 3/2 and Ti 2p 1/2 peaks are negatively shifted (∼0.3 eV) because of a partial reduction of Ti 4+ to Ti 3+ and a higher electron density induced by Ti 3+ species, which was reported previously .…”

“…For W-TiO 2 , two peaks located at 459.6 and 465.5 eV are assigned to Ti 2p 3/2 and Ti 2p 1/2 , which are in agreement with reported values for TiO 2 nanotubes. 31 As seen for B-TiO 2 , the Ti 2p 3/2 and Ti 2p 1/2 peaks are negatively shifted (∼0.3 eV) because of a partial reduction of Ti 4+ to Ti 3+ and a higher electron density induced by Ti 3+ species, which was reported previously. 32 For the B-TiO 2 /BiVO 4 heterojunction samples, the Ti 2p peak intensities were reduced by increasing the BiVO 4 content.…”

Comparative Studies of g-C3N4 and C3N3S3 Organic Semiconductors—Synthesis, Properties, and Application in the Catalytic Oxygen Reduction

“…The details on the equipment and data treatment are presented in ref. [ 51 ] and in the Supplementary Materials . The measured binding energies for individual elements were corrected in relation to the C1s carbon peak at 284.8 eV.…”

Photoelectrochemical Properties of BODIPY-Sensitized Anodic TiO2 Layers Decorated with AuNPs for Enhanced Solar Performance

“…Enhanced TiO 2 /Au properties are connected to the excitation of Au LSPR that might promote photocatalytic reactions on the TiO 2 surface according to (i) hot electron transfer from Au LSPR to the TiO 2 conduction band, (ii) plasmonic-induced resonance energy transfer (PRET), or (iii) plasmon-induced local heating. 49,50 Moreover, the presence of AuNPs may improve the electron lifetime and reduce the rate of charge recombination. 55 The additional deposition of BODIPY microrods on the TiO 2 /Au surface affects the IPCE spectrum in the UV/violet spectral region and increases its intensity in visible light (up to c.a.…”