化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (5) : 230-234. DOI: 10.19817/j.cnki.issn1006-3536.2023.05.042

科学研究

AgBr/Ag₂CrO₄复合光催化剂的制备及其光催化性能

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Synthesis and photocatalytic activity of AgBr/Ag₂CrO₄ composite photocatalyst

Chen Shan, Zhong Yujun, Qin Ronghuan, Huang Qiao, Qin Liqin, Huang Guobao, Tao Pingfang

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Received		Published
2022-12-01		2023-05-20
Issue Date	Revised Date
2023-05-31	2022-12-01

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摘要

以硝酸银和铬酸钾为原料,采用简单的水热法制备Ag₂CrO₄,再通过沉淀法合成复合不同质量分数AgBr的AgBr/Ag₂CrO₄复合光催化剂,并对产物进行通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外漫反射仪(DRS)和荧光光谱分析仪(PL)等表征。结果表明:水热法所得Ag₂CrO₄为块状微米结构,粒径约为20μm;不同质量分数的AgBr复合Ag₂CrO₄后,粒径明显变小,约为1μm。以亚甲基蓝为目标分解物,考察了复合不同质量分数AgBr的AgBr/Ag₂CrO₄复合催化剂光催化性能,结果表明,复合光催化剂的催化性能更佳;在模拟自然光照下,0.10g复合质量分数为90% AgBr的AgBr/Ag₂CrO₄,降解亚甲基蓝溶液(100mL,10mg/L)10min后,降解率高达97.7%,是相同条件下商用TiO₂对亚甲基蓝降解率的5倍。

Abstract

Ag₂CrO₄ was prepared by simple hydrothermal process using silver nitrate and potassium chromate as raw materials,and then AgBr/Ag₂CrO₄ composite photocatalysts with different mass fractions of AgBr were synthesized by precipitation method.The samples were characterized by XRD,SEM,DRS and PL.The results revealed that the Ag₂CrO₄ obtained by hydrothermal method was bulk micron structure with a particle size of about 20μm.After compounding Ag₂CrO₄ with different mass fractions of AgBr,the particle size of AgBr/Ag₂CrO₄ obviously decreased to about 1μm.The photocatalytic properties of AgBr/Ag₂CrO₄ composite catalyst with different mass fractions of AgBr were explored with methylene blue (MB) as the target decomposer.The results showed that the photocatalytic property of the composite photocatalyst was better than those of the single-phase AgBr or Ag₂CrO₄.0.1g AgBr/Ag₂CrO₄ composite catalyst,compounded with 90% mass fractions AgBr,exhibited the highest degradation rate of 97.7% after degrading MB solution (100mL,10mg/L) for 10 min under simulated natural light,which was 5 times that of commercial TiO₂ under the same conditions.

关键词

Ag₂CrO₄ / AgBr/Ag₂CrO₄ / 可见光 / 光催化性能 / 亚甲基蓝

Key words

Ag₂CrO₄ / AgBr/Ag₂CrO₄ / visible light / photocatalytic activity / methylene blue

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AgBr/Ag₂CrO₄复合光催化剂的制备及其光催化性能[J]. 化工新型材料, 2023, 51(5): 230-234 DOI:10.19817/j.cnki.issn1006-3536.2023.05.042

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