Publication
Title
Tandem CQDs loaded triple metal oxide interface-reinforced built-in electric field for a wide-spectral-responsive photocatalyst
Author
Abstract
Focusing at efficient Cefixime (CEFX) removal, a delicate ultrathin-Bi2WO6 (UBWO) stacked quasi-CoFe2O4 binanosheets (BT) were meticulously designed and integrated with spherical MnWO4 (MWO) and carbon quantum dots (CQDs), forming a n-p-n CQDs@MWO/CFO:UBWO nanohybrid. XRD, XPS, TEM and other sys-tematic analysis demonstrated the vertically aligned layer by layer assembly of UBWO:CFO BT, and a shift in the highly exposed (211) facet of UBWO after nanohybrid formation as well as large surface area (323.33 m2/g) was achieved. UV-vis DRS, PL and EIS proved high separation efficiency, prolonged life time and photogeneration of more charge carriers with absorption of full light spectrum. As expected, the optimized 5 %CQDs@0.25MWO/ 0.1CFO:UBWO nanohybrid displayed excellent visible light absorption and outstanding CEFX photodegradation whose kinetic constant were 21.11, 12.5, 8.82 folds higher than UBWO, CFO and MWO counterparts. This enhanced photodegradation performance ascribed to the dual strategy as follows: (i) Cascaded charge transfer with the Built-in electric field (BIEF) after n-p-n heterojunction, (ii) the upconverted PL and the electron re-servoir properties of CQDs. Degradation efficiency maintained over six consecutive cycles affirming the superior recyclability of the photocatalyst. A possible degradation pathway was proposed based on GC-MS/MS analysis and the end products toxicity were systematically predicted using ECOSAR program. The toxicity of the end product was investigated against bacterial species. The proposed work provides a novel way for the fabrication of efficient photocatalyst with excellent practical applicability.
Language
English
Source (journal)
Colloids and surfaces: A: physicochemical and engineering aspects. - Amsterdam
Publication
Amsterdam : 2023
ISSN
0927-7757
DOI
10.1016/J.COLSURFA.2023.132417
Volume/pages
679 (2023) , p. 1-13
Article Reference
132417
ISI
001092530800001
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 04.12.2023
Last edited 08.12.2023
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