Cobalt Doping on Zirconium Titanate as a Potential Photocatalyst with Visible-Light-Response

Emilya Faridatul Sulaikhah; Rian Kurniawan; Mokhammad Fajar Pradipta; Wega Trisunaryanti; Akhmad Syoufian

doi:10.22146/ijc.49459

Cobalt Doping on Zirconium Titanate as a Potential Photocatalyst with Visible-Light-Response

https://doi.org/10.22146/ijc.49459

Emilya Faridatul Sulaikhah⁽¹⁾, Rian Kurniawan⁽²⁾, Mokhammad Fajar Pradipta⁽³⁾, Wega Trisunaryanti⁽⁴⁾, Akhmad Syoufian^(5*)

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(4) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(5) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(*) Corresponding Author

Abstract

Synthesis of cobalt-doped zirconium titanate (Co-doped ZrTiO₄) as a potential photocatalyst with visible-light-response had been conducted. Materials used in this research were titanium tetraisopropoxide (TTIP) as a precursor of TiO₂, ZrO₂ as another semiconductor for coupling, and CoSO₄·7H₂O as the source of cobalt dopant. The composite was prepared by the sol-gel method with various cobalt contents and calcination temperatures. Composites with various Co dopant contents (0, 1, 3, 5, 7, and 9% (Co wt./Ti wt.)) were calcined at 500 °C for 4 h. In addition, the composite with 5% of dopant content was calcined at 700 and 900 °C to observe the influence of calcination temperature. All samples were characterized by using X-ray powder diffraction method (XRD), Fourier-transform infrared spectroscopy (FTIR), specular reflectance UV-Vis spectroscopy (SRUV), and scanning electron microscopy equipped with X-ray energy dispersive spectroscopy (SEM-EDS). Co-doped ZrTiO₄ with the lowest bandgap (2.94 eV) was achieved in a sample containing 3% of cobalt content calcined at 500 °C.

Keywords

cobalt; dopant; Co-doped ZrTiO4; photocatalyst; sol-gel

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DOI: https://doi.org/10.22146/ijc.49459