| At present,water pollution is serious,so it needs efficient and environmental protection methods to remove the pollutants in the water.Photocatalytic oxidation and Fenton oxidation are favored for their high efficiency and simplicity.However,the traditional photocatalysis has some problems such as narrow absorption range of visible light and slow charge transfer,while traditional Fenton reaction has such disadvantages as large consumption of H2O2 and narrow p H range.Combining photocatalysis and Fenton to form a photocatalysis-Fenton synergy system can effectively solve the shortcomings of single photocatalysis and Fenton reaction.1)The FeOOH/Bi2MoO6 composite catalyst with surface oxygen vacancies was prepared using bismuth molybdate（Bi2MoO6） as semiconductor catalytic material.A photocatalysis-Fenton synergy system was constructed by adding H2O2.The introduction of surface oxygen vacancies shortens the band gap of Bi2MoO6 and increases the absorption range of visible light.Surface oxygen vacancies can also weaken the O-O bond in H2O2 and widen the p H range of the Fenton reaction.The experimental results show that the photocatalysis-Fenton synergy can reach 100% in 3 h,which is 1.54 times and 1.33 times the photocatalysis and Fenton reactions,respectively,and composite catalyst has good stability.2)The rGO was compounded with Bi2MoO6,and Fe（Ⅲ）was added to form a Fe（Ⅲ）/rGO/Bi2MoO6 photocatalysis-Fenton synergy system.The two-dimensional sp2 hybrid carbon structure of rGO has good conductivity.This conjugate structure allows photogenerated electrons to be quickly transferred to Fe（Ⅲ）,which hinders the recombination of photogenerated electron-hole pairs.The electrons transferred to rGO can also directly react with H2O2 in the system to generate ·OH.The experimental results show that the Fe（Ⅲ）/rGO/Bi2MoO6 composite catalyst can remove phenol in 100% of the photocatalysis-Fenton synergy at 3 h.After five cycles,the degradation efficiency is still above 80%.Figure 36;Table 2;Reference 122... |
