Huang, J;
Shen, J;
Li, S;
Cai, J;
Wang, S;
Lu, Y;
He, J;
... Lai, Y; + view all
(2020)
TiO₂ nanotube arrays decorated with Au and Bi₂S₃ nanoparticles for efficient Fe₃⁺ ions detection and dye photocatalytic degradation.
Journal of Materials Science & Technology
, 39
pp. 28-38.
10.1016/j.jmst.2019.04.043.
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Abstract
Due to increasingly serious environmental problems, many researchers are investigating green clean-energy to solve the world's energy supply issues. So the strategy that Au nanoparticles (Au NPs) and bismuth sulfide (Bi₂S₃) NPs are used to evenly decorate TiO₂ nanotube arrays (TiO₂ NTAs) was carried out. Composite materials demonstrated enhanced solar light absorption ability and excellent photoelectrochemical performance. This was attributed to the presence of Bi₂S₃ NPs with a narrow band gap and the decoration with noble metallic Au NPs which resulted in local surface plasmon resonance (LSPR) effects. The Au/Bi₂S₃@TiO₂ NTAs composites exhibit improved photocatalytic activity for the degradation of methylene blue (MB) under irradiation of UV and visible light. Moreover, the Au/Bi₂S₃@TiO₂ NTAs exhibits high fluorescence emission at 822 nm. Due to the better binding affinity between Bi₂S₃, TiO₂ and Fe₃⁺ ions, the synthesized nanocomposites exhibit high selectivity to Fe₃⁺ ions. The number of binding sites for Au/Bi₂S₃@TiO₂NTAs was estimated to be 1.41 according to the double logarithmic regression method. The calculated value of “K” was 1862 M^{-1}. Fluorescence emission intensity decreases with increasing concentration (30 μM–5000 μM). The detection limit of the synthesized sensor is 0.221 μM.
| Type: | Article |
|---|---|
| Title: | TiO₂ nanotube arrays decorated with Au and Bi₂S₃ nanoparticles for efficient Fe₃⁺ ions detection and dye photocatalytic degradation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jmst.2019.04.043 |
| Publisher version: | https://doi.org/10.1016/j.jmst.2019.04.043 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | TiO₂ nanotube, Au, Bi₂S₃, Photocatalysis, Fluorescence sensing |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10091055 |
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