Enhanced Photocatalytic Activity of TiO2 Nanoparticles Supported on Electrically Polarized Hydroxyapatite

Zhang, Xuefei; Yates, Matthew Z.

doi:10.1021/acsami.8b03838

Enhanced Photocatalytic Activity of TiO₂ Nanoparticles Supported on Electrically Polarized Hydroxyapatite

Journal Article · Fri Apr 27 00:00:00 EDT 2018 · ACS Applied Materials and Interfaces

DOI:https://doi.org/10.1021/acsami.8b03838· OSTI ID:1494562

Zhang, Xuefei ^[1]; ^[2]

Univ. of Rochester, NY (United States). Dept. of Chemical Engineering; Laboratory for Laser Energetics, University of Rochester
Univ. of Rochester, NY (United States). Dept. of Chemical Engineering. Lab. for Laser Energetics

Fast recombination of photogenerated charge carriers in titanium dioxide (TiO₂) remains a challenging issue, limiting the photocatalytic activity. This study demonstrates here increased photocatalytic performance of TiO₂ nanoparticles supported on electrically polarized hydroxyapatite (HA) films. Dense and thermally stable yttrium and fluorine co-doped HA films with giant internal polarization were synthesized as photocatalyst supports. TiO₂ nanoparticles deposited on the support were then used to catalyze the photochemical reduction of aqueous silver ions to produce silver nanoparticles. It was found that significantly more silver nanoparticles were produced on polarized HA supports than on depolarized HA supports. In addition, the photodegradation of methyl orange with TiO₂ nanoparticles on polarized HA supports was found to be much faster than with TiO₂ nanoparticles on depolarized HA supports. It is proposed that separation of photogenerated electrons and holes in TiO nanoparticles is promoted by the internal polarization of the HA support, and consequently, the recombination of charge carriers is mitigated. The results imply that materials with large internal polarization can be used in strategies for enhancing quantum efficiency of photocatalysts.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0001944

OSTI ID:: 1494562

Journal Information:: ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 20 Vol. 10; ISSN 1944-8244

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Photodegradation of Methyl Orange Over CdS–TiO2/L-zeolite Composite Photocatalyst Qi, Hongbin; Liu, Hui; Zhang, Lingxiang Journal of Inorganic and Organometallic Polymers and Materials, Vol. 29, Issue 2 https://doi.org/10.1007/s10904-018-1031-4	journal	November 2018
TiO ₂ nanoparticles coated with deep eutectic solvents: characterization and effect on photodegradation of organic dyes Kuhn, Bruna L.; Paveglio, Guilherme C.; Silvestri, Siara New Journal of Chemistry, Vol. 43, Issue 3 https://doi.org/10.1039/c8nj05957h	journal	January 2019

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
hydroxyapatite
methyl orange
photocatalysis
polarization
silver
titania