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Surface plasma Ag-decorated single-crystalline TiO(B) nanorod/defect-rich g-CN nanosheet ternary superstructure 3D heterojunctions as enhanced visible-light-driven photocatalyst.

07:00 EST 30th January 2019 | BioPortfolio

Summary of "Surface plasma Ag-decorated single-crystalline TiO(B) nanorod/defect-rich g-CN nanosheet ternary superstructure 3D heterojunctions as enhanced visible-light-driven photocatalyst."

Ag-TiO(B)/g-CN ternary heterojunctions photocatalysts are fabricated by hydrothermal-calcination, photo-deposition procedure, and followed by in-situ solid-state chemical reduction procedure. As-obtained photocatalysts are consisted with heterojunctions between 2D g-CN sheets and 1D TiO(B) single-crystalline nanorods. The band gap of Ag-TiO(B)/g-CN ternary heterojunctions photocatalysts is reduced to ∼2.23 eV due to plasma Ag and surface engineering. Under visible light irradiation, it has an optimal photocatalytic property for the reduction of Cr (95%) and degradation of NH (93%). The apparent reaction rate constants (k) of ternary heterojunctions photocatalysts for NH and Cr are 25 and 12 folds higher than that of original TiO(B). Furthermore, Ag-TiO(B)/g-CN also has excellent hydrogen production efficiency, which is up to 410 µmol h g. This enhancement can be attributed to the unique heterojunction formed by 1D single-crystalline TiO(B) nanorods and 2D g-CN sheets, surface plasma resonance effect of plasma Ag nanoparticle, and surface engineering. A possible photocatalytic mechanism is also proposed by analysizing the XPS valence-band spectra and the Mott-Schottky.

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This article was published in the following journal.

Name: Journal of colloid and interface science
ISSN: 1095-7103
Pages: 63-72

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