Feasibility of Macroporous CeO2 Photocatalysts for Removal of Lead Ions from Water

Takuya Nozaki; Ryo Shoji; Yasukazu Kobayashi; Kazunori Sato

doi:10.9767/bcrec.13.2.1020.256-261

DOI: https://doi.org/10.9767/bcrec.13.2.1020.256-261

Feasibility of Macroporous CeO2 Photocatalysts for Removal of Lead Ions from Water

Takuya Nozaki¹, Ryo Shoji¹ , Yasukazu Kobayashi², Kazunori Sato³

¹Department of Chemical Science and Engineering, National Institute of Technology, Tokyo College, Tokyo, Japan

²Materials Research Center for Element Strategy, Tokyo Institute of Technology, Kanagawa, Japan

³Department of Materials Science and Technology, Nagaoka University of Technology, Niigata, Japan

Received: 21 Mar 2017; Revised: 30 Nov 2017; Accepted: 8 Dec 2017; Available online: 11 Jun 2018; Published: 1 Aug 2018.

Editor(s): Istadi Istadi

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Abstract

Removal of lead ions from water was conducted by a coupling approach of adsorption and photoelectrodeposition over a macroporous CeO₂ photocatalyst loaded with ZnO. The photocatalyst was prepared by the hard template method and the impregnation method. The various size of silica spheres (0.05-0.4 µm) were used as a template for the photocatalyst, and the highest BET surface area (73.8 m²/g) was given in the sample prepared with the smallest silica sphere (0.05 µm). In the removal of lead ions, the porous sample showed a large amount of removal of lead ions. In addition, the ZnO loaded catalysts showed a larger amount of removal for lead ions than an unloaded catalyst under the UV light irradiation. In the reaction, since zinc ions were simultaneously dissolved to the solution, it was suggested that this reaction was the ion-exchange reaction between lead ions and zinc ions and was promoted by the UV light irradiation.

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Keywords: CeO2 photocatalyst; Lead ion removal; Macroporous photocatalyst; Hard template method

Funding: Nagaoka University of Technology

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Section: Original Research Articles

Language : EN

In 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018)

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