磁性卤氧化铋耦合过硫酸盐催化光降解AO7

发布时间：2018-03-10 16:32

  本文选题：BiOI　切入点：FeO　出处：《黑龙江大学自然科学学报》2017年02期 　论文类型：期刊论文

【摘要】：采用溶剂热-沉积法制备了新型可见光催化磁性纳米Bi OI/Fe3O4复合材料,通过傅里叶红外光谱仪(FT-IR)、紫外-可见漫反射光谱(DRS)对其进行表征。首次提出了BiOI/Fe_3O_4耦合过硫酸盐(PS)催化光降解工艺,并以偶氮染料AO7模拟天然水体,考察了黄腐酸(FAs)以及水中常见的阴离子HCO_3~-和Cl~-等因素对AO7降解的影响。结果表明,持续可见光照射60 min,AO7在Bi OI/Fe_3O_4耦合PS体系中的降解率为98.3%;但加入HCO_3~-、黄腐酸(FAs)和Cl~-后,由于·OH和SO_4~-·被淬灭捕获,AO7的降解受到明显抑制,而Cl-的抑制作用小于前两者。经过3次材料重复回收利用,AO7降解率均能达到90%以上,表明材料具有良好的稳定性。
[Abstract]:A novel visible photocatalytic magnetic nanocrystalline Bi OI/Fe3O4 composite was prepared by solvothermal deposition. It was characterized by Fourier transform infrared spectroscopy (FTIR) and UV-Vis diffuse reflectance spectroscopy (DRS). The photodegradation process catalyzed by BiOI/Fe_3O_4 coupled persulfate was proposed for the first time, and the azo dye AO7 was used to simulate the natural water body. The effects of the common anions in water, such as humic acid and anions, on the degradation of AO7 were investigated. The results showed that the degradation rate of AO7 in Bi OI/Fe_3O_4 coupled PS system for 60 min after continuous visible irradiation was 98.3%, but after adding HCOS3, FAS-, FAS- and Cl-, the degradation rate of AO7 in Bi OI/Fe_3O_4 coupled PS system was 98.3%, and the degradation rate of AO7 was 98.3% after continuous visible light irradiation for 60 min. The degradation of AO7 by quenching and quenching of 路OH and SO4- 路was obviously inhibited, but the inhibitory effect of Cl- was less than that of the former two. The degradation rate of AO7 could reach more than 90% after three times of recycling, which indicated that the material had good stability.
【作者单位】： 四川大学建筑与环境学院;
【基金】：国家自然科学基金资助项目(51508354) 成都市科技惠民技术研发项目(2015-HM01-00536-SF)
【分类号】：O643.36;TB332
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本文编号：1594156