光催化
罗丹明B
材料科学
光降解
异质结
可见光谱
纳米颗粒
热液循环
氢溴酸
水热合成
核化学
化学工程
纳米技术
催化作用
无机化学
化学
光电子学
有机化学
工程类
作者
Dongdong Lv,Dafeng Zhang,Xipeng Pu,Yecheng Li,Jie Yin,Huiyan Ma,Jianmin Dou
摘要
BiOBr/Bi 2 Sn 2 O 7 heterojunction photocatalysts were successfully synthesized by treating hydrothermal as‐prepared Bi 2 Sn 2 O 7 nanoparticles with hydrobromic acid (HBr). Partial Bi 2 Sn 2 O 7 nanoparticles reacted with HBr to form the sheet‐like BiOBr, and Bi 2 Sn 2 O 7 nanoparticles distributed evenly on BiOBr sheets. BiOBr/Bi 2 Sn 2 O 7 photocatalysts treated with different concentrations of HBr solution were successfully obtained, and their structures, morphologies, optical, and visible light photocatalytic properties were characterized by XRD, DRS, PL, SEM, and TEM. The experimental results showed that the BiOBr/Bi 2 Sn 2 O 7 photocatalysts showed improved photocatalytic activity under visible light irradiation than pure Bi 2 Sn 2 O 7 . The sample treated with 0.08 mol/L HBr solution shows the best visible light photodegradation performance of rhodamine B. In addition, the active species and photocatalytic mechanism were discussed in detail.
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