Mesoporous Composite Networks of Linked MnFe2O4 and ZnFe2O4 Nanoparticles as Efficient Photocatalysts for the Reduction of Cr(VI)

Semiconductor photocatalysis has recently emerged as an effective and eco-friendly approach that could meet the stringent requirements for sustainable environmental remediation. To this end, fabrication of novel photocatalysts with unique electrochemical properties high catalytic efficiency is utmost importance requires adequate attention. In work, dual component mesoporous frameworks spinel ferrite ZnFe2O4 (ZFO) MnFe2O4 (MFO) nanoparticles are reported efficient detoxification hexavalent chromium (Cr(VI)) organic pollutants. The as-prepared materials, which synthesized via a polymer-templated aggregating self-assembly method, consist continuous network linked (ca. 6–7 nm) exhibit large surface area (up to 91 m2 g−1) arising from interstitial voids between nanoparticles, according electron microscopy N2 physisorption measurements. By tuning composition, MFO-ZFO composite catalyst containing 6 wt.% MFO attains excellent photocatalytic Cr(VI) reduction activity in presence phenol. In-depth studies UV-visible absorption, photoelectrochemical measurements show performance enhancement predominantly arises suitable band edge positions constituent efficiently separates transports charge carriers through interface ZFO/MFO junctions. Besides, open pore structure these ensembled networks also boost reaction kinetics. remarkable durability heterostructures implies great possibility implementing new nanocomposite catalysts into realistic contaminated wastewater.