The design of a high-efficiency and
ecofriendly persulfate (PS)
activator with low cost and superior performance in water decontamination
still remains a big challenge. Herein, we report a facile strategy
for the synthesis of novel pyrolusite-templated mesoporous catalyst
(PMC), and used it as a green PS activator for the outstanding removal
of bisphenol A (BPA) in water. The N2 adsorption–desorption
curves and SEM-EDS images show that pyrolusite templating can successfully
modulate the mesoporous structure of the catalyst; the XRD and XPS
spectra indicate that pyrolusite templating renders the catalyst with
enriched active sites and faster electron transfer. The mechanism
studies suggest that both the radical and nonradical pathway [singlet
oxygen (1O2)] contributed to BPA degradation,
and 86.81% of the total organic carbon (TOC) of 100 mg/L BPA was removed
using merely 0.4 g/L PMC, without detectable metal ion leaching. This
work provides a new strategy for the structural design and property
adjustment of an efficient persulfate catalyst for green environmental
remediation.
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