Photocatalysis of Cr- and Fe-Doped CeO2 Nanoparticles to Selective Oxidation of 5-Hydroxymethylfurfural

Jeong-Woo Nam; Vy Ngoc Pham; Jeong Min Ha; Minjeong Shin; Hangil Lee; Young-Sang Youn

doi:10.3390/nano13010044

Photocatalysis of Cr- and Fe-Doped CeO₂ Nanoparticles to Selective Oxidation of 5-Hydroxymethylfurfural

Nanomaterials (Basel). 2022 Dec 22;13(1):44. doi: 10.3390/nano13010044.

Authors

Jeong-Woo Nam¹, Vy Ngoc Pham², Jeong Min Ha¹, Minjeong Shin³, Hangil Lee², Young-Sang Youn¹

Affiliations

¹ Department of Chemistry, Yeungnam University, Daehak-ro 280, Gyeongsan, Gyeongbuk 38541, Republic of Korea.
² Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea.
³ School of Chemistry and Energy, Sungshin Women's University, 55, Dobong-ro 76 ga-gil, Gangbuk-gu, Seoul 01133, Republic of Korea.

Abstract

Oxygen vacancies (V_o) present in CeO₂ nanoparticles (NPs) can effectively boost their photocatalytic activity under ultraviolet (UV) light. To improve photocatalytic performance, Cr- and Fe-doped CeO₂ NPs with increased V_o were prepared using a simple method of doping Cr and Fe ions into CeO₂ NPs, which was confirmed by an in-depth analysis of the structural and electronic changes. Through photocatalytic degradation (PCD) experiments with 5-hydroxymethylfurfural (HMF), we found that the PCD rates of the two doped CeO₂ NPs were faster than that of the CeO₂ NPs. In addition, the conversion of HMF to 2,5-furandicarboxylic acid (FDCA) using the doped CeO₂ NPs occurred only through the mechanism of the selective oxidation to 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), exhibiting better efficiency than using CeO₂ NPs.

Keywords: 5-hydroxymethylfurfural; oxygen vacancy; photocatalytic property; transition metal-doped CeO2 nanoparticles.

Abstract

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