Abstract
Peroxymonosulfate(PMS)activation and photocatalysis are effective technologies to remove organic pol-lutants,but the adsorption effect of the catalyst is usually unheeded in degradation process.Herein,a bifunctional catalyst of amorphous MoSx(a-MoSx)with 3D layer-by-layer superstructure was synthesized by assembling basic active units[Mo3S13]2-of MoS2.The large interlayer spacing and high exposure of active sites render a-MoSx to have excellent synergy of adsorption and photo-assisted PMS activation for tetracycline(TC)degradation.Experiments and DFT calculation show that TC can be efficiently enriched on a-MoSx by pore filling,π-π interaction,hydrogen bonding and high adsorption energy.Subsequently,PMS can be quickly activated through electron transfer with a-MoSx,resulting in high TC degradation ef-ficiency of 96.6％within 20 min.In addition,the synergistic mechanism of adsorption and photo-assisted PMS activation was explored,and the degradation pathway of TC was expounded.This work is inspira-tional for constructing bifunctional catalysts with superior synergistic adsorption and catalytic capabilities to remove refractory organic pollutants in water.
万方数据