Photocatalytic degradation of ciprofloxacin and sulfamethoxazole on a carbon nanodot doped tungsten trioxide: degradation product study

被引：15
作者：
Zwane, Busisiwe Nokalika [1 ,2 ]
Mabuba, Nonhlangabezo [1 ,3 ]
Orimolade, Benjamin O. [1 ]
Koiki, Babatunde A. [1 ]
Arotiba, Omotayo A. [1 ,3 ]
机构：
[1] Univ Johannesburg, Dept Chem Sci, Johannesburg, South Africa
[2] Univ Johannesburg, DST Mintek Nanotechnol Innovat Ctr, Johannesburg, South Africa
[3] Univ Johannesburg, Ctr Nanomat Sci Res, Johannesburg, South Africa
来源：
REACTION KINETICS MECHANISMS AND CATALYSIS | 2020年 / 131卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
Ciprofloxacin; Sulfamethoxazole; Advanced oxidation process; Photocatalytic semiconductor; Tungsten trioxide; Carbon nanodots; WO3; NANORODS; WATER; KINETICS; NANOPARTICLES; FLUORESCENCE; NORFLOXACIN; FABRICATION; SYSTEMS; BLUE;
D O I：
10.1007/s11144-020-01841-5
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：
This work is focused on the photocatalytic degradation of antibiotics ciprofloxacin and sulfamethoxazole in wastewater using a nanocomposite of tungsten trioxide (WO3) and carbon nanodots (CNDs). This material was prepared by doping tungsten trioxide (WO3) with carbon nanodots (CNDs) by hydrothermal technique. The structural, optical, morphological and photocatalytic properties of the CNDs-doped WO(3)nanocomposite as well as an undoped WO(3)nanorod were successfully characterized by TEM, XRD, Raman, FTIR, BET and UV-Vis DRS. The photocatalytic degradation performance, degradation kinetics and degradation patterns were followed by UV-Visible spectroscopy and ultra performance liquid chromatography coupled with mass spectrometry (UPLC-MS). The percentage removal of ciprofloxacin and sulfamethoxazole were higher with the WO3-CNDs than the pristine WO(3)photocatalyst denoting the positive effect of doping. The percentage removal of the antibiotics when monitored by UPLC-MS was found to be higher than that of UV-Visible spectroscopy. The intermediate products and pathway were different with the doped and the undoped WO(3)photocatalysts.
引用
收藏
页码：453 / 470
页数：18
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