Kinetic study of self-assembly of Ni(II)-doped TiO2 nanocatalysts for the photodegradation of azo pollutants

Chia-Yun Chen, Li Jen Hsu

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Ni(ii)-doped TiO2 nanoparticles were fabricated by a simple and reliable hydrothermal method. Morphology, crystallographic structure and light-absorption properties of the formed photocatalysts were characterized. In addition, both the adsorption phenomena and photodegradation of two types of azo dyes in the presence of Ni(ii)-doped TiO2 were investigated. The experimental results showed that the dye adsorption follows the Langmuir adsorption pathway, and the dye degradation was significantly enhanced by doping of Ni ions into TiO2 photocatalysts. The optimal doping of Ni ions for the removal of RB5 and 3R dyes was found to be 1%, giving a degradation efficiency 3 times for RB5 dye and 3.5 times for 3R dye higher than those of un-doped TiO2. Furthermore, the underlying kinetic mechanism was systematically studied, in which the second-order kinetic model was found to be the explicit mechanism for dye degradation on TiO2 with Ni(ii) doping.

Original languageEnglish
Pages (from-to)88266-88271
Number of pages6
JournalRSC Advances
Volume5
Issue number107
DOIs
Publication statusPublished - 2015 Jan 1

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Photodegradation
Self assembly
Coloring Agents
Dyes
Kinetics
Doping (additives)
Photocatalysts
Adsorption
Degradation
Azo Compounds
Ions
Azo dyes
Light absorption
Nanoparticles

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

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abstract = "Ni(ii)-doped TiO2 nanoparticles were fabricated by a simple and reliable hydrothermal method. Morphology, crystallographic structure and light-absorption properties of the formed photocatalysts were characterized. In addition, both the adsorption phenomena and photodegradation of two types of azo dyes in the presence of Ni(ii)-doped TiO2 were investigated. The experimental results showed that the dye adsorption follows the Langmuir adsorption pathway, and the dye degradation was significantly enhanced by doping of Ni ions into TiO2 photocatalysts. The optimal doping of Ni ions for the removal of RB5 and 3R dyes was found to be 1{\%}, giving a degradation efficiency 3 times for RB5 dye and 3.5 times for 3R dye higher than those of un-doped TiO2. Furthermore, the underlying kinetic mechanism was systematically studied, in which the second-order kinetic model was found to be the explicit mechanism for dye degradation on TiO2 with Ni(ii) doping.",
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Kinetic study of self-assembly of Ni(II)-doped TiO2 nanocatalysts for the photodegradation of azo pollutants. / Chen, Chia-Yun; Hsu, Li Jen.

In: RSC Advances, Vol. 5, No. 107, 01.01.2015, p. 88266-88271.

Research output: Contribution to journalArticle

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