Application of pea-like yolk-shell structured Fe3O4@TiO2 nanosheets for photocatalytic and photo-Fenton oxidation of bisphenol-A

Xingxing Li; Mingcan Cui; Yonghyeon Lee; Jongbok Choi; Jeehyeong Khim

doi:10.1039/c9ra04084f

Application of pea-like yolk-shell structured Fe₃O₄@TiO₂ nanosheets for photocatalytic and photo-Fenton oxidation of bisphenol-A

RSC Adv. 2019 Jul 17;9(38):22153-22160. doi: 10.1039/c9ra04084f. eCollection 2019 Jul 11.

Authors

Xingxing Li¹, Mingcan Cui¹, Yonghyeon Lee¹, Jongbok Choi¹, Jeehyeong Khim¹

Affiliation

¹ School of Civil, Environmental, and Architectural Engineering, Korea University 145 Anam-ro Seongbuk-gu Seoul 02841 Republic of Korea hyeong@korea.ac.kr.

Abstract

Uniform pea-like yolk-shell (PLYS) structured magnetic TiO₂(PLYS-Fe₃O₄@TiO₂) nanosheets have been prepared via a combined kinetics-controlled mechanical force-driven and hydrothermal etching assisted crystallization method and characterized. The resulting PLYS-Fe₃O₄@TiO₂ nanosheets possess well defined yolk-shell structures with a large BET surface area (∼187.26 m² g^-1) and a strong magnetic susceptibility (∼17.4 emu g^-1). The reaction rate constant was 24.2 × 10^-2 min^-1 as a result of oxidative decomposition of BPA using UV/PLYS-Fe₃O₄@TiO₂/H₂O₂ system. This is 1.1 and 8.34 times faster than the BPA decomposition reaction rate constant in UV/TiO₂/H₂O₂ and UV/Fe₃O₄/H₂O₂ systems, respectively. The synthesized catalyst also exhibited excellent recycle capability and excellent acid decomposition performance.