Details

Autor(en) / Beteiligte

• Shen, Wenjing
• Xiang, Dandan
• Yang, Junnan
• Tang, Yanting
• Xin, Changhui
• Guo, Quanhui
• Yu, Xin

Titel

Fabrication of beta zeolite supported Ti3+-TiO2/CdS composite for ultrahigh-performance photodegradation of tetracycline under visible-light illumination

Ist Teil von

• Colloids and surfaces. A, Physicochemical and engineering aspects, 2022-11, Vol.653, p.129965, Article 129965

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this work, beta zeolite supported Ti3+-TiO2/CdS heterojunction was prepared for photodegradation of tetracycline under visible-light irradiation, and zeolite served as a support for the high dispersions of the Ti3+-TiO2 nanoparticles. The obtained zeolite/Ti3+-TiO2/CdS heterojunction showed a relatively high surface areas of approximately 63.2 m2 g−1, much higher than those of the prepared Ti3+-TiO2/CdS (27.1 m2 g−1), Ti3+-TiO2 (36.5 m2 g−1), and CdS (31.1 m2 g−1), strongly demonstrating the significant of zeolite for high dispersion of the Ti3+-TiO2/CdS composite. Besides, the experimental results also showed that the photocatalytic degradation efficiency could reach 78 % in 3 min for the zeolite/Ti3+-TiO2/CdS heterojunction, and the corresponding rate constant was as high as 0.788 min−1, which was 26.90 times that of pristine Ti3+-TiO2, 2.24 times of pristine CdS, and 2.04 times of the Ti3+-TiO2/CdS composite, mainly because of the supporting effects of zeolite and the formation of Ti3+-TiO2/CdS heterostructure for highly enhanced charge separation. In addition, the trapping experiment revealed that the main reactive species involved in tetracycline degradation were attributed to the photo-generated holes and ⸱O2- species. [Display omitted]