Industrial Water Treatment ›› 2026, Vol. 46 ›› Issue (4): 140-149. doi: 10.19965/j.cnki.iwt.2025-0365

• RESEARCH AND EXPERIMENT • Previous Articles     Next Articles

Photocatalytic degradation of oxytetracycline in water by Pr6O11/ZrO2

Mingwei CAO()   

  1. Yellow River Conservancy Technical University, Kaifeng 475004, China
  • Received:2025-08-27 Online:2026-04-20 Published:2026-04-24

Pr6O11/ZrO2光催化降解水中土霉素

曹明伟()   

  1. 黄河水利职业技术大学,河南 开封 475004
  • 作者简介:

    曹明伟(1979— ),副教授,E-mail:。

  • 基金资助:
    河南省教育厅高等学校重点科研项目(18B570006)

Abstract:

In this study, ZrO2-based composite photocatalytic coatings modified with Pr6O11 up-conversion materials were proposed for the removal of oxytetracycline(OTC) from wastewater. The Pr6O11/ZrO2 composite photocatalyst powder was prepared by means of an ultrasound-assisted co-precipitation method, and the Pr6O11/ZrO2 photocatalytic coatings were prepared using polyurethane as the matrix resin with high-speed stirring and ultrasound-assisted by an electric mixer. The characterization of the Pr6O11/ZrO2 photocatalysts was conducted using a range of analytical methods,including X-ray diffraction, scanning electron microscopy,energy dispersive spectroscopy, and UV-visible diffuse reflectance spectroscopy. The study revealed that the incorporation of Pr6O11 the specific surface area of the Pr6O11/ZrO2 composite. The modified Pr6O11/ZrO2 composite photocatalysts exhibited bandgap energies as low as 2.19 eV, along with a broad spectral utilization range extending up to 625 nm. The impact of Pr6O11 doping ratio, dosing amount of Pr6O11/ZrO2, and initial concentration of OTC on the degradation of concrete-loaded photocatalytic coatings on OTC was investigated separately. Furthermore, the experimental conditions for the removal of OTC were optimized using response surface methodology, and it was concluded that the maximum removal of OTC could reach 85.97% when the doping ratio of Pr6O11 was 0.45, dosing amout of Pr6O11/ZrO2 was 1.4 g/L, and the concentration of OTC was 30.45 mg/L. The findings of this study suggest that Pr6O11/ZrO2 exhibits remarkable photocatalytic activity and holds considerable promise for the treatment of wastewater containing OTC.

Key words: photocatalytic coating, up-conversion material, antibiotic contamination, hygromycin, ZrO2

摘要:

将经Pr6O11上转换材料改性的氧化锆(ZrO2)基复合光催化涂料用于去除废水中的土霉素(OTC)。采用超声辅助共沉淀法制备了Pr6O11/ZrO2复合光催化剂粉末,以聚氨酯为基体树脂,在电动搅拌机的高速搅拌与超声辅助下制备Pr6O11/ZrO2光催化涂料。利用X射线衍射、扫描电子显微镜、能量色散光谱和紫外可见光漫反射光谱等方法对Pr6O11/ZrO2光催化剂进行了详细表征。研究发现,Pr6O11的引入显著增加了Pr6O11/ZrO2的比表面积。改性后的Pr6O11/ZrO2复合光催化剂具有低至2.19 eV的带隙能量和宽至625 nm的光谱利用范围。并且分别考察了Pr6O11掺杂比、Pr6O11/ZrO2投加量、OTC质量浓度对混凝土负载光催化涂料降解OTC效果的影响。此外进一步利用响应面法优化了去除OTC的实验条件,得出当Pr6O11掺杂比为0.465,Pr6O11/ZrO2投加量为1.4 g/L,OTC初始质量浓度为30.45 mg/L时,对OTC的去除率最大,可达85.97%。该研究结果表明,Pr6O11/ZrO2具有优异的光催化活性,在治理含有OTC的废水方面具有广阔的前景。

关键词: 光催化涂料, 上转换材料, 抗生素污染, 土霉素, 氧化锆

CLC Number: