Solar-light-driven LaFe x Ni1- x O3 perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Chao-Wei Huang; Shu-Yu Hsu; Jun-Han Lin; Yun Jhou; Wei-Yu Chen; Kun-Yi Andrew Lin; Yu-Tang Lin; Van-Huy Nguyen

doi:10.3762/bjnano.13.79

Solar-light-driven LaFe _x Ni_1- _x O₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

Beilstein J Nanotechnol. 2022 Sep 5:13:882-895. doi: 10.3762/bjnano.13.79. eCollection 2022.

Authors

Chao-Wei Huang¹, Shu-Yu Hsu², Jun-Han Lin², Yun Jhou², Wei-Yu Chen³, Kun-Yi Andrew Lin⁴, Yu-Tang Lin⁵, Van-Huy Nguyen⁶

Affiliations

¹ Department of Engineering Science, National Cheng Kung University, Tainan 70101, Taiwan.
² Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan.
³ Department of Materials Engineering, National Pingtung University of Science and Technology, No.1, Xuefu Rd., Neipu Township, Pingtung County 912, Taiwan.
⁴ i-Center for Advanced Science and Technology (iCAST), Innovation and Development Center of Sustainable Agriculture, Department of Environmental Engineering, National Chung Hsing University, Taichung 402227, Taiwan.
⁵ Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States.
⁶ Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education (CARE), Chengalpattu district, Kelambakkam, Tamil Nadu, 603103, India.

Abstract

LaFe _x Ni_1- _x O₃ perovskite oxides were prepared by the sol-gel method under various conditions, including different pH values (pH 0 and pH 7) and different calcination temperatures (500-800 °C) as well as different Fe/Ni ratios (1/9, 3/7, 5/5, 7/3, 9/1). The samples were examined by XRD, DRS, BET, and SEM to reveal their crystallinity, light-absorption ability, specific surface area, and surface features, respectively. The photocatalytic Fenton reaction was conducted using various LaFe _x Ni_1- _x O₃ perovskite oxides to decompose the methylene blue molecules. Accordingly, the synthesis condition of pH 0, calcination temperature at 700 °C, and Fe/Ni ratio = 7/3 could form LaFe_0.7Ni_0.3O₃ perovskite oxides as highly efficient photocatalysts. Moreover, various conditions during the photocatalytic degradation were verified, such as pH value, catalyst dosage, and the additional amount of H₂O₂. LaFe_0.7Ni_0.3O₃ perovskite oxides could operate efficiently under pH 3.5, catalyst dosage of 50 mg/150 mL, and H₂O₂ concentration of 133 ppm to decompose the MB dye in the 1st order kinetic rate constant of 0.0506 s^-1.

Keywords: LaFeO3; LaNiO3; methylene blue (MB); perovskite oxides; photocatalyst.

Grants and funding

The authors would like to sincerely thank the Ministry of Science and Technology (MOST) in Taiwan for providing the funding under MOST 109-2221-E-992 -035 and MOST 110-2221-E-006 -217 -MY3.