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Issue 60, 2014
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Optical and photocatalytic behaviours of nanoparticles in the Ti–Zn–O binary system

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Abstract

Continuous hydrothermal flow synthesis (CHFS) has been used as a rapid and clean, synthetic method to produce a range of crystalline nanoparticles in the Ti–Zn–O binary system. The nanopowders were prepared from aqueous solutions of titanium(IV) bis(ammonium lactato)dihydroxide (TIBALD) and hydrated zinc nitrate, respectively, using a CHFS reactor which uses superheated water (at 400 °C and 24.1 MPa) as a reagent and crystallizing medium. The resulting nanopowders were heat-treated at 850 °C for five hours in air to give photoactive semiconductor mixtures of rutile and zinc oxide and/or zinc titanates. The as-prepared powders and their corresponding heat-treated mixed phase photocatalysts were characterized using powder X-ray synchrotron diffraction, transmission electron microscopy, BET surface area measurement, X-ray photoelectron spectroscopy and UV-Vis spectrophotometry. Because of the interest for these materials in UVA and UVB attenuating materials, the UV-Vis profiles of the nanocomposites and solid solutions were studied. Photocatalytic activity of the samples towards the decolourisation of methylene blue dye was also assessed.

Graphical abstract: Optical and photocatalytic behaviours of nanoparticles in the Ti–Zn–O binary system

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Publication details

The article was received on 03 Jun 2014, accepted on 23 Jun 2014 and first published on 24 Jun 2014


Article type: Paper
DOI: 10.1039/C3RA48030E
Citation: RSC Adv., 2014,4, 31799-31809
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    Optical and photocatalytic behaviours of nanoparticles in the Ti–Zn–O binary system

    J. B. M. Goodall, S. Kellici, D. Illsley, R. Lines, J. C. Knowles and J. A. Darr, RSC Adv., 2014, 4, 31799
    DOI: 10.1039/C3RA48030E

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