BaTiO3-TiO2复合光催化剂降解盐酸四环素及机理研究

doi:10.3969/j.issn.2097-2806.2024.02.008

摘要/Abstract

摘要：

以钛酸丁酯（TBOT）和钛酸钡（BaTiO₃）为原料，采用水热法制备了BaTiO₃-TiO₂复合光催化剂，研究了不同煅烧温度（400，500，600，700 ℃）对复合光催化剂结构、形貌及对盐酸四环素（TCH）光催化性能的影响。结果表明：煅烧温度的升高促进了部分TiO₂向BaTiO₃的转变，BaTiO₃的衍射峰增强，晶粒尺寸逐渐增大，球状颗粒的生长成型更为完全。BaTiO₃-TiO₂复合光催化剂的禁带宽度为3.03 eV，煅烧温度的变化没有改变BaTiO₃-TiO₂的吸收带边，复合光催化剂的吸收强度随煅烧温度的升高先增大后减小，600 ℃退火处理的BaTiO₃-TiO₂光催化剂吸收强度最高。在180 min时，600 ℃退火的BaTiO₃-TiO₂光催化剂对TCH的降解率最高可达92.80%，相比400 ℃退火，降解率提高了24.08%，重复使用5次对TCH的降解率逐次衰减幅度小于7%，重复使用第5次时对TCH的降解率为70.11%，在pH=6.2的条件下180 min时BaTiO₃-TiO₂的降解率最高为93.19%。

关键词: BaTiO₃-TiO₂, 光催化, 盐酸四环素, 水热法, 煅烧温度

Abstract:

In this paper, using butyl titanate （TBOT） and barium titanate （BaTiO₃） as raw materials, BaTiO₃-TiO₂ composite photocatalysts were prepared by hydrothermal method. The effects of different calcination temperatures （400, 500, 600, 700 ℃） on the structure, morphology, and photocatalytic performance of the composite photocatalyst for tetracycline hydrochloride （TCH） were studied. The results show that the increase in calcination temperature promotes the transformation of some TiO₂ into BaTiO₃, the diffraction peak of BaTiO₃ increases, the grain size gradually increases, and the growth and molding of spherical particles become more complete. The band gap width of BaTiO₃-TiO₂ composite photocatalyst is 3.03 eV, and the change in calcination temperature does not change the absorption band edge of BaTiO₃-TiO₂. The absorption intensity of the composite photocatalyst first increases and then decreases with the increase in calcination temperature. The BaTiO₃-TiO₂ composite absorption intensity after annealing at 600 ℃ is the highest. At 180 min, the degradation efficiency of the BaTiO₃-TiO₂ photocatalyst annealed at 600 ℃ for TCH can reach a maximum of 92.80%, which is 24.08% higher than that of the catalyst annealed at 400 ℃. The gradual attenuation of the degradation rate of TCH after five repetitions is less than 7%. The degradation rate of TCH during the fifth repetitions is 70.11%, and the degradation rate of BaTiO₃-TiO₂ is 93.19% at pH=6.2 for 180 min.

Key words: BaTiO₃-TiO₂, photocatalysis, tetracycline hydrochloride, hydrothermal method, calcination temperature

中图分类号:

O643.3

汤艳娜, 陈子珍. BaTiO₃-TiO₂复合光催化剂降解盐酸四环素及机理研究[J]. 日用化学工业（中英文）, 2024, 54(2): 175-180.

Yanna Tang, Zizhen Chen. Degradation of tetracycline hydrochloride by BaTiO₃-TiO₂ composite photocatalyst and its mechanism[J]. China Surfactant Detergent & Cosmetics, 2024, 54(2): 175-180.

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BaTiO₃-TiO₂复合光催化剂降解盐酸四环素及机理研究

Degradation of tetracycline hydrochloride by BaTiO₃-TiO₂ composite photocatalyst and its mechanism

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