摘要:
通过低温法制备BiOI粉末,运用SEM、XRD和DRS对制备产物进行表征。结果显示BiOI结晶度好、粒径小、比表面积大、可见光利用强。以甲基橙为主要目标物,对其在可见光下进行光催化降解研究。实验表明:在可见光下,pH=5.5,甲基橙初始浓度为20mg/L,BiOI投加量为0.20g/L时,综合降解效果最好,210min光降解率可达80%;相同条件下,BiOI降解直接黑、甲基紫、刚果红染料都有良好的效果,说明BiOI拥有一定的应用前景。
Abstract:
In this paper, photocatalyst of BiOI powder was prepared at low temperature and characterized by SEM, XRD and DRS. The characterization results showed that the photocatalyst of BiOI powder had good crystallinity and high utilization of visible light, with small particle size but large specific surface area. Then, methyl orange was used as the main target to study the catalytic performance of BiOI under visible light. The experimental results showed that under visible light irradiation, when 0.20g/L of BiOI was added into methyl orange solution of 20mg/L as initial concentration with the pH of 5.5, the removal rate of methyl orange reached to 80% after 210 minutes of reaction. Under the same conditions, BiOI also had good performance in degradation of other dyes such as Direct Black, methyl violet and Congo red, indicating that BiOI may have broad application prospect.
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