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Naphthalene derivatized TiO2–carbon hybrid materials for efficient photocatalytic splitting of water

Paper ID Volume ID Publish Year Pages File Format Full-Text
54979 47035 2013 7 PDF Available
Title
Naphthalene derivatized TiO2–carbon hybrid materials for efficient photocatalytic splitting of water
Abstract

We report a facile approach for the synthesis of TiO2–Carbon (C) hybrid formed by a ligand-to-metal charge transfer (LMCT) complexation between a small organic molecule precursor, 2,3-dihydroxynaphthalene (DN) and TiO2 nanomaterial. The resultant photocatalysts were characterized by powder X-ray diffraction (XRD), surface area and porosity analysis, Raman spectroscopy, diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy, transmission electron microscopy (TEM), and by X-ray photoelectron spectroscopy (XPS). Carbonization by N2 pyrolysis at 800 °C altered the physical properties of the TiO2 as evidenced by the increase in the surface area of TiO2 from 6.5 m2 g−1 to 12.5 m2 g−1 and fluorescence quenching of TiO2 emission. The photocatalytic performances of these TiO2–C hybrid materials were evaluated by calculating the amount of hydrogen evolved from the decomposition of water under solar simulated illumination. A marked improvement was observed from ∼0 to 2.6   μmol/gTiO2/h evolved from the bare TiO2-0 and TiO2–C-240 composites, respectively. These results suggested that anchoring of C onto the TiO2 surface can harness effective transfer of electrons through the TiO2–C hetero junction, and promote the photocatalytic performance of TiO2.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (117 K)Download as PowerPoint slideHighlights► 2,3-Dihydroxynaphthalene precursor for the carbonization of TiO2 nanoparticles. ► Hydrothermal treatment for the synthesis of highly crystalline TiO2. ► N2 pyrolysis for the deposition of carbonaceous material onto TiO2. ► Resultant photocatalysts used for splitting of water under solar simulated irradiation.

Keywords
TiO2; Dihydroxynaphthalene; Pyrolysis; Carbon; Photocatalysis; Hydrogen generation
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Naphthalene derivatized TiO2–carbon hybrid materials for efficient photocatalytic splitting of water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 199, 1 January 2013, Pages 8–14
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us