Опубликована: Янв. 1, 2023

Nascent MnO2 colloids produced during permanganate oxidation process is highly oxidative and appealing for the of emerging organic contaminants (EOCs). However, nascent usually show dense bulked structure which blocks availability active sites further enhancement reactivity. Herein, spherical with mesoporous were synthesized via redox reactions between colloidal nanospheres plant polyphenol (e.g., tannic acid) permanganate. The shows exposure abundant surface-Mn (III) (16.2 mol%), thus exhibits outstanding performance towards EOCs. Complete removal bis-phenol A (BPA, 10 mg/L) was obtained 1.0 mM in 40 min at neutral pH. Mechanism study reveals that both Mn(III) Mn(IV) contribute to BPA. presence surface-Mn(III) greatly promotes reactivity colloids, leading a high kinetic 0.12 min−1 initial min. selectivity toward electron rich EOCs good complicated water matrix, revealing promising potential application. This work provides distinct case engineering novel structured efficient elimination water.

Язык: Английский