Influence of Different Morphologies of BiOBr Photocatalysts on Hg~0 Removal Performance

张旭; 邢微波; 张安超; 张景繁; 王晨凯; 刘艳雯

doi:10.16056/j.2096-7705.2022.02.010

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Influence of Different Morphologies of BiOBr Photocatalysts on Hg~0 Removal Performance

更新时间：2026-01-19

- Influence of Different Morphologies of BiOBr Photocatalysts on Hg~0 Removal Performance
- Issue 2, Pages: 55-60+85(2022)
- 作者机构：
  
  河南理工大学机械与动力工程学院
- 作者简介：
- 基金信息：
- DOI：10.16056/j.2096-7705.2022.02.010
  CLC： O643.36;O644.1;X701
- Published：2022
- 稿件说明：
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张旭, 邢微波, 张安超, et al. Influence of Different Morphologies of BiOBr Photocatalysts on Hg~0 Removal Performance[J]. 2022, (2): 55-60+85.
DOI：

张旭, 邢微波, 张安超, et al. Influence of Different Morphologies of BiOBr Photocatalysts on Hg~0 Removal Performance[J]. 2022, (2): 55-60+85. DOI： 10.16056/j.2096-7705.2022.02.010.

摘要

为探究形貌对 Bi OBr 光催化剂光催化脱汞性能的影响，采用共沉淀法分别在乙酸、乙醇、乙二醇和去离子水条件下合成了不同形貌的 Bi OBr 光催化剂。采用 SEM、DRS、XRD、TG 和 XPS 等测试手段对 Bi OBr 光催化剂的物理化学性能进行表征。结果表明：不同溶剂制备的 Bi OBr 光催化剂具有不同的形貌，但它们的晶相结构基本一样，且在低温情况下其结构稳定。4 个样品中，Bi OBr-HAc 样品在紫外光区表现出最佳的光吸收性能。脱汞实验表明，Bi OBr-HAc 光催化剂表现出良好的光催化活性，脱除 Hg

效率高达 95.4%。采用活性物种清除技术发现光生空穴 (h

) 和超氧阴离子自由基 (·O

) 在 Hg

的氧化过程中起关键作用。

Abstract

In order to investigate the effect of morphology on the photocatalytic performance of Bi OBr photocatalyst for mercury removal

Bi OBr photocatalysts with different morphologies were prepared by co-precipitation method under the conditions of acetic acid

ethanol

ethylene glycol and deionized water

respectively. The physical and chemical properties of Bi OBr photocatalyst were characterized by SEM

DRS

XRD

TG and XPS. The results showed that Bi OBr photocatalysts prepared under different solvents possessed different morphologies

but their crystal phase structures were basically the s

ame

and their structures were stable at low temperature. Among the four samples

Bi OBr-HAc sample showed the best light absorption performance in the UV region. Mercury removal experiments showed that Bi OBr-HAc photocatalyst exhibited a good photocatalytic activity and Hg~0removal efficiency can be up to 95.4%. Photogenerated holes （h

） and superoxide anion radical （·O

） were found to play key roles in the process of Hg~0oxidation by the active species scavenging technique.

关键词

Keywords

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