【摘要】 以四氯化锡（SnCl₄·5H₂O）、锡酸铋（Bi（NO₃）₃·5H₂O）、柠檬酸（C₆H₈O₇）为主要原料,通过控制水解步骤,采用水热法合成具有快速吸附-高效降解有机污染物的层片状球形BiOCl/Bi₂Sn₂O₇复相光催化材料。采用X射线衍射（XRD）、扫描电镜（SEM）及自由基淬灭等技术对复相光催化材料样品的晶相、形貌、光催化活性物种等结构与性质进行表征。结果表明:以20 mg/L RhB为目标降解物、光催化粉体样品添加量为0.1 g/L时,在可见光激发下,光照8 min后,RhB的降解率达99.7%;重复使用14次后,其降解率仍可达到99%,样品具有优秀的光催化性能。此外,光催化过程中自由基淬灭的反应证明,超氧自由基是起关键作用的中间反应活性物种。更多还原

【Abstract】 A novel layered spherical photocatalyst BiOCl/Bi₂Sn₂O₇ with rapid adsorption and high degradation of organic pollutants was synthesized by hydrothermal method using SnCl₄·5H₂O,Bi（NO₃）₃·5H₂O and C₆H₈O₇ as the main raw materials via controlling the hydrolysis process.XRD,SEM and radical quenching were used to characterize the structure and properties of the synthesized samples.The powder was used as a photocatalyst for degradation of RhB in aqueous solution under visible light.The results show that approximately 99.7% RhB（20 mg/L） is eliminated after 8 min at catalyst dose of 0.1 g/L.The catalyst is found to be reusable.After fourteen successive cycles,the decoloration rate of RhB solution can still reach 99%.The synthesized powder has excellent photocatalytic properties.In addition,the radical quenching reaction in the photocatalytic process indicates that superoxide radical is key intermediate reactive species.更多还原