Photocatalytic hydrogen evolution by co-catalyst-free TiO₂/C bulk heterostructures synthesized under mild conditions

Abstract

Defective TiO2/C bulk heterostructures exhibit visible light photoresponsivity and remarkable H2 evolution rates under both UV and visible light irradiation.

Defects in the Amorphous–Crystalline Evolution of Gel-Derived TiO2

“…More information on the data processing and instrument characteristics are provided elsewhere. 9 Samples for terahertz spectroscopy were prepared as pellets using SGT and HSGT sample series finely ground powders. Because of their fragile nature, to increase the mechanical strength and for easy handling of the pellets during the spectroscopic investigation, the powders were pressed in between two supporting holed paper disks having 0.5 and 1 cm inner and outer diameter.…”

“…Furthermore, by drying wet hybrid gels under vacuum and subsequent thermal treatments in different atmospheres, we obtained anatase TiO 2 /C bulk heterostructures showing a remarkable photocatalytic activity in hydrogen generation. 9 All these peculiar features are strictly related to the organic component in HSGT and are not observed on particulate amorphous TiO 2 gels [sol−gel titania (SGT)] prepared following a similar procedure but without any additives.…”

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

“…Even if the given examples on imaging and spectroscopy show the great potential of the investigation in the THz range, the major part refers to works done in the low frequency range (<6 THz) and at low energy level (µJ) [169]. Many of the complex molecular investigations were complemented with the integrated analysis of THz time domain response, yielding structural information together with classical IR spectroscopy [170,171]. In this context, the FEL-assisted THz sources covering both bands of the spectrum will throw aside the technical difficulties faced with infrared and Raman spectroscopy.…”

Enhanced photoelectrochemical response of 1D TiO2 by atmospheric pressure plasma surface modification

“…TiO 2 has been widely explored for thin film solar cells [1], photocatalytic H 2 evolution [2], photoelectrochemical (PEC) water splitting [3], self-cleaning and antifogging applications [4] due to its optical and electronic properties along with the nontoxicity, economical, chemical stability, and anticorrosive characteristics [5]. TiO 2 finds valuable applications in LEDs, as photo-anode in new photovoltaic devices, photoelectrochemical cells, water splitting, and in gas sensors & heat reflectors [6e12].…”