Decolorization of Reactive Black 5 by Mesoporous Al 2 O 3 @TiO 2  Nanocomposites | Zendy

Deng Hui | Zendy; Zhang Mingwei | Zendy; Cao Yuekun | Zendy; Lin Yuxiang | Zendy

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Decolorization of Reactive Black 5 by Mesoporous Al 2 O 3 @TiO 2 Nanocomposites

Author(s) -

Deng Hui,

Zhang Mingwei,

Cao Yuekun,

Lin Yuxiang

Publication year - 2019

Publication title -

environmental progress and sustainable energy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.495

H-Index - 66

eISSN - 1944-7450

pISSN - 1944-7442

DOI - 10.1002/ep.12976

Subject(s) - mesoporous material , anatase , photocatalysis , high resolution transmission electron microscopy , materials science , aqueous solution , adsorption , nanocomposite , chemical engineering , zeta potential , fourier transform infrared spectroscopy , langmuir adsorption model , precipitation , nuclear chemistry , nanotechnology , nanoparticle , chemistry , catalysis , transmission electron microscopy , organic chemistry , physics , meteorology , engineering

In this study, mesoporous Al 2 O 3 @TiO 2 nanocomposites were synthesized via two successive precipitation methods. Due to the coated TiO 2 layer, the Al 2 O 3 @TiO 2 exhibited a significantly enhanced efficiency for the removal of reactive black 5 dye (RB5). The morphology and compositional characteristics of Al 2 O 3 @TiO 2 were investigated by TEM, HRTEM, XRD, EDS, FTIR, BET, and zeta‐potential analysis. TEM photos illustrated that TiO 2 film covered Al 2 O 3 , XRD suggested compositional phases of γ‐Al 2 O 3 and anatase TiO 2 , and BET measurement confirmed its characteristic of the mesoporous material. Al 2 O 3 @TiO 2 was applied as an adsorbent to remove RB5 from aqueous solution, and the adsorption isotherms fitted well to the Langmuir isotherm model. The photocatalysis experiments confirmed that Al 2 O 3 @TiO 2 had the good photocatalytic performance for degrading RB5 and the hydroxyl radical was the major active group. The UV–Vis adsorbance spectra demonstrated that this Al 2 O 3 @TiO 2 could incompletely degrade RB5 dye under natural indoor light simultaneously when adsorption occurred. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S230–S242, 2019

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