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http://dx.doi.org/10.14478/ace.2017.1070

Optical Properties and Phenol Destruction Performance of Pd-inserted TiO2 Photocatalysts  

Do, Jeong Yeon (Department of Chemistry, College of Natural Sciences, Yeungnam University)
Kim, Teho (Daegu Science High School)
Sim, Hwanseok (Daegu Science High School)
Jeong, Hamin (Daegu Science High School)
Choi, Jae Hoon (Daegu Science High School)
Kang, Misook (Department of Chemistry, College of Natural Sciences, Yeungnam University)
Publication Information
Applied Chemistry for Engineering / v.28, no.5, 2017 , pp. 547-553 More about this Journal
Abstract
This study focused on the difference of photocatalytic performance by the incorporation of Pd into the $TiO_2$ framework and suggested five different catalysts composed of $TiO_2$ and x mol% $Pd-TiO_2$ (x = 0.25, 0.5, 0.75, and 1.0). A typical sol-gel method was used to synthesize catalysts, and the phenol photodegradation performance of each catalysts was evaluated. The physicochemical and optical properties of catalysts were confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy/energy dispersive spectrometer (SEM/EDS), ultraviolet/visible spectroscopy (UV/Vis), photoluminescence spectroscopy (PL), and photocurrent measurements. With the addition of Pd ions, the band gap of catalysts was shortened and the charge separation between photogenerated electrons and holes easily also occurred. As a result, the phenol photo-destruction performance over 0.75 mol% $Pd-TiO_2$ catalyst was 3 times higher than that of pure $TiO_2$. This is believed to be due to Pd ions acted as an electron capturing function during photocatalysis.
Keywords
photodegradation; phenol; photocatalysts; $Pd-TiO_2$; effective charge separation;
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