Synthesis of TiO2 using different hydrolysis catalysts and doped with Zn for efficient degradation of aqueous phase pollutants under UV light

Synthesis of TiO2 using different hydrolysis catalysts and doped with Zn for efficient... In this work, various TiO2 and TiO2 doped with 0.1, 1.0, and 5.0 mol% of Zn were prepared by the sol–gel method varying different hydrolysis catalysts (HNO3, OHAc, H3PO4) in order to be used as photocatalysts for environmental applications. The X-ray diffraction results showed that the different TiO2 samples have presented the anatase as main phase, However, the acid nature has played an important role in the superficial and optical properties. The N-physisortion analysis has revealed that the specific surface area of calcined TiO2 samples prepared using H3PO4, HOAc, and HNO3 was 245, 100, and 90 m2 g−1, respectively, while the spectroscopic UV analysis, the band gap energy has shifted by 3.3–3.0 eV. In order to improve the optical properties of TiO2, the last preparation was doped with different zinc concentrations. The result showed that, as the Zn concentration increase by 0.1–5.0 mol%, the surface area increased from 90 to 120 m2 g−1. Nevertheless, the E g returned from 3.0 to 3.32. The SEM analyses have not revealed important morphological changes between no doped and doped materials. The catalytic activity of the composite was studied on the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) and the activity results showed that small Zn concentrations decrease the t 1/2 in 28 min. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Synthesis of TiO2 using different hydrolysis catalysts and doped with Zn for efficient degradation of aqueous phase pollutants under UV light

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Publisher
Springer Netherlands
Copyright
Copyright © 2010 by Springer Science+Business Media B.V.
Subject
Chemistry; Inorganic Chemistry ; Physical Chemistry ; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-010-0119-4
Publisher site
See Article on Publisher Site

Abstract

In this work, various TiO2 and TiO2 doped with 0.1, 1.0, and 5.0 mol% of Zn were prepared by the sol–gel method varying different hydrolysis catalysts (HNO3, OHAc, H3PO4) in order to be used as photocatalysts for environmental applications. The X-ray diffraction results showed that the different TiO2 samples have presented the anatase as main phase, However, the acid nature has played an important role in the superficial and optical properties. The N-physisortion analysis has revealed that the specific surface area of calcined TiO2 samples prepared using H3PO4, HOAc, and HNO3 was 245, 100, and 90 m2 g−1, respectively, while the spectroscopic UV analysis, the band gap energy has shifted by 3.3–3.0 eV. In order to improve the optical properties of TiO2, the last preparation was doped with different zinc concentrations. The result showed that, as the Zn concentration increase by 0.1–5.0 mol%, the surface area increased from 90 to 120 m2 g−1. Nevertheless, the E g returned from 3.0 to 3.32. The SEM analyses have not revealed important morphological changes between no doped and doped materials. The catalytic activity of the composite was studied on the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) and the activity results showed that small Zn concentrations decrease the t 1/2 in 28 min.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Mar 10, 2010

References

  • Titanium dioxide nanomaterials: synthesis, properties, modifications and applications
    Chen, X; Mao, SS

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