A Study of the Degradation of LEV by Transparent PVA/NCD-TiO2 Nanocomposite Films with Enhanced Visible-Light Photocatalytic Activity

被引：5

作者：

Jiang, Anhua ^{[1
]}

Huang, Xinwen ^{[1
]}

Zhang, Geshan ^{[2
,3
]}

Yang, Wanquan ^{[4
]}

机构：

[1] Zhejiang Univ Technol, Coll Environm, Hangzhou 310014, Peoples R China

[2] Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R China

[3] Wuhan Inst Technol, Sch Chem & Environm Engn, Wuhan 430205, Peoples R China

[4] Powerchina Huadong Engn Corp Ltd, Hangzhou 311122, Peoples R China

来源：

CATALYSTS | 2022年 / 12卷 / 11期

关键词：

levofloxacin; polyvinyl alcohol; visible-light photocatalysis; titanium dioxide; water treatment; WASTE-WATER TREATMENT; POLY VINYL ALCOHOL; TRANSFORMATION PRODUCTS; BISMUTH OXYHALIDES; TIO2; NANOPARTICLES; ILLICIT DRUGS; LEVOFLOXACIN; OXIDATION; FENTON; PHOTODEGRADATION;

D O I：

10.3390/catal12111336

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In recent years, antibiotics (such as levofloxacin (LEV)) have been detected widely in the environment. Semiconductor photocatalysis has been recognized as a promising technology for removing pollutants in the environment. In this work, nitrogen and carbon codoped titanium dioxide nano-catalyst (NCD-TiO2) was immobilized in polyvinyl alcohol (PVA) matrix to form PVA/NCD-TiO2 films through solution casting and thermal treatment, which exhibited good photocatalytic efficiency for LEV degradation. The results showed that about 42% LEV can be degraded after 2 h in the presence of PVA/NCD-TiO2 nanocomposite film (the weight ratio of NCD-TiO2 to PVA is 8% and thermal treatment is 120 degrees C) under visible light. Moreover, possible pathways of photocatalytic degradation of LEV according to the detected intermediates are proposed, which provide insight into the degradation mechanism of LEV by using PVA/NCD-TiO2 photocatalytic films. Finally, the synthesized PVA/NCD-TiO2 films exhibited excellent reusability and stability in photocatalysis. This work provides fundamental support for the design of a high-stability, excellent photocatalyst for practical application.

引用

页数：16

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