Optimization of BaTiO3/Co3O4 composites for degradation of PMS system
Purposes—To study the effects of additives cetyltrimethyl ammonium bromide(CTAB)and EDT A-2Na on the relative Co2+content and catalytic activity of BaTiO3/Co3O4(BT/Co)compos-ite.Methods—Ferroelectric BT/Co composites were synthesized with sol-gel method in combination with high temperature and were used to activate peroxymonosulfate(PMS)to oxidize and degrade methylene blue(MB)in aqueous phase.The effect of CTAB and EDTA-2Na on obtaining the catalyt-ic activity of BT/Co composites were investigated via oxidative degradation experiments of organic pollutants MB.Results—As additives,CTAB and EDTA-2Na had no significant effect on the phase composition and microstructure of the BT/Co composites,but the relative content of Co2+ on the cata-lyst surface showed obvious changes.Conclusions—When EDTA-2Na was used as additive,the rela-tive content of Co2 on the surface of the BT/Co composite was increased,and more active oxidation species were generated by activating PMS,which accelerated the degradation of MB,and the degrada-tion rate of MB reached 99％within 10 min.
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