【摘 要】
：
The MnFe2O4/g-C3N4/diatomite composites (Mn/G/D) were prepared via a facile precipitation-calcination method in this study. The Mn/G/D possessed higher specific surface area, lower electron-hole pairs\' recombination rate, as well as wider and stronger
【机 构】
：
School of Chemical and Environmental Engineering,China University of Mining and Technology(Beijing),
论文部分内容阅读
The MnFe2O4/g-C3N4/diatomite composites (Mn/G/D) were prepared via a facile precipitation-calcination method in this study. The Mn/G/D possessed higher specific surface area, lower electron-hole pairs\' recombination rate, as well as wider and stronger visible light absorption capacity. Since the synergistic effect between g-C3N4 and MnFe2O4, the photogenerated electron could transfer from g-C3N4 to MnFe2O4, which could promote the migration of electrons as well as enhance the photocatalytic activity and per-oxymonosulfate (PMS) activation efficiency. Mn/G/D-5％ composite displayed the excellent degradation performance of bisphenol A (BPA) with the removal efficiency of 99.9％ under PMS/Vis system, which was approximately 2.47 and 63.8 times as high as that of the Mn/G/D-5％/PMS and Mn/G/D-5％/Vis sys-tem, respectively. Moreover, negative electricity derived from diatomite surface also promoted the pho-togenerated carriers\' migration, and the degradation rate constant was around 2.4 times higher than that of MnFe2O4/g-C3N4 (Mn/G). In addition, quenching experiments showed that both radical pathway (h+, ·OH, ·O2- and SO4·-) and non-radical pathway (1O2) were responsible for the degradation of BPA.
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