One-pot photoassisted synthesis, in situ photocatalytic testing for hydrogen generation and the mechanism of binary nitrogen and copper promoted titanium dioxide

Abstract

For the sustainable production of hydrogen by photocatalysis, the use of renewable resources such as water, organic compounds from plant biomass and earth abundant metal promoters is desired. We herein describe the previously not reported "one-pot" photoassisted synthesis of a binary metal-nitrogen promoted Cu(0)-N-TiO photocatalyst from a N-TiO precursor by photodeposition of copper directly in the photocatalytic suspension. The N-TiO contains nanocrystalline anatase as found by XRD and Raman spectroscopy. X-ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR) spectroscopy indicate that a nitrogen promoter is present as a substitutional site. The scheme of relaxation of a photoexcited charge through a substitutional nitrogen induced midgap states in N-TiO is proposed. The binary promoted Cu(0)-N-TiO photocatalyst prepared from N-TiO by "one-pot" photodeposition of copper in the suspension showed a high activity in the in situ hydrogen generation under near-UV/visible light with glycerol in water, up to 675 μmol g h. The "one-pot" photoassisted synthesis and mechanism of operation of the Cu(0)-N-TiO photocatalyst are studied by the complementary in situ spectroscopic methods.

Automated Construction of a Photocatalysis Dataset for Water-Splitting Applications

“…While clause extraction can be helpful, information extraction would still be difficult as even “basic” sentences with no coordinations can still contain multiple bits of information, and simpler automatically generated parsers can succeed at identifying the spans of text containing facts, but fail to correctly associate information. For example, take the following sentence: “The binary promoted Cu(0)–N-TiO2 photocatalyst prepared from N-TiO2 by “one-pot” photodeposition of copper in the suspension showed a high activity in the in situ hydrogen generation under near-UV/visible light with glycerol in water , up to 675 μmol g −1 h −1 ” 18 . Here, we cannot use the previous algorithm to extract clauses, but there are many chemical entities (Cu(0)–N-TiO2, N-TiO2) that could be associated with the activity value (675 μ mol g −1 h −1 ).…”