Design of a novel direct Z-scheme BiOIO3 /Bi2WO6 heterojunction for enhanced photocatalytic degradation of norfloxacin under visible light
Chen, Zelin (Xiamen University of Technology)
Zheng, Bang-Xiao (Xiamen University of Technology)
Ye, Yingxue (Xiamen University of Technology)
Lei, Miaoqing (Xiamen University of Technology)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Wu, Yicheng (Xiamen University of Technology)
Fu, Haiyan (Xiamen University of Technology)

Data:	2024
Resum:	The unique electronic structure, appropriate bandgap energy, and excellent electron transfer capability make bismuth-based semiconductors hotspots in the field of photocatalysis. Novel BiOIO3/Bi2WO6 Z-scheme heterojunctions were fabricated via in-situ hydrothermal synthesis. The BIOBIW-3 heterojunctions (BiOIO3:Bi2WO6=0. 25:0. 8, mole ratio) exhibited excellent photocatalytic activity for norfloxacin (NOR), with a degradation efficiency of 90. 41 % after 90 min of photoreaction and a reaction kinetic constant of 0. 02132 min-1, which was 5. 02 and 9. 35 times higher than that of BIO and BIW, respectively. The superior photocatalytic performance can be attributed to the intimate interface between BiOIO3 and Bi2WO6, as well as the staggered energy band structure that facilitates the formation of a Z-type heterojunction. This not only widens the range of visible light absorption but also enhances the separation and transfer of photogenerated carriers while maintaining a high capacity for redox reactions. The dominant active species in the degradation process were photogenerated holes (h+) and superoxide (∙O-2)radicals, and an in-depth exploration of the possible mechanism was conducted. Furthermore, the effects of various parameters, including solution pH, catalyst dosage, and NOR concentration on the photocatalytic degradation of NOR were also investigated. The prepared BiOIO3/Bi2WO6 heterojunctions exhibited remarkable photocatalytic performance and chemical stability, presenting a novel research direction for employing layered bismuth-based materials in the degradation of fluoroquinolone antibiotic wastewater.
Ajuts:	Agencia Estatal de Investigación PID2022-140808NB-I00 Agencia Estatal de Investigación TED2021-132627B-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Direct Z-scheme heterojunction ; BiOIO3/Bi2WO6 ; Nanocomposites ; Visible-light photocatalysis ; Fluoroquinolone antibiotics
Publicat a:	Materials Today Communications, Vol. 40 (August 2024) , art. 110126, ISSN 2352-4928

DOI: 10.1016/j.mtcomm.2024.110126

Disponible a partir de: 2026-08-31 Postprint

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