A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light
Photocatalysis has been proved to be a promising approach in wastewater purification. However, it is hard to recycle powdery photocatalysts from wastewater in industry, but immobilizing them using larger materials can overcome this drawback. For that reason, TiO2@g-C3N4 was embedded into chitosan to...
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IWA Publishing
2021
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oai:doaj.org-article:3bb3508250d3448585b46eb06061575c2021-11-06T11:10:00ZA reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light0273-12231996-973210.2166/wst.2021.188https://doaj.org/article/3bb3508250d3448585b46eb06061575c2021-06-01T00:00:00Zhttp://wst.iwaponline.com/content/83/12/3063https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Photocatalysis has been proved to be a promising approach in wastewater purification. However, it is hard to recycle powdery photocatalysts from wastewater in industry, but immobilizing them using larger materials can overcome this drawback. For that reason, TiO2@g-C3N4 was embedded into chitosan to synthesize a highly reusable and visible-light-driven chitosan/TiO2@g-C3N4 nanocomposite membrane (CTGM). CTGM showed enhanced photoactivity and the photocatalytic efficiencies of the toxic water pollutants methyl orange (M.O.), rhodamine B (Rh.B), chromium (VI) (Cr (VI)), 2,4-dichlorophenol (2,4-DCP) and atrazine (ATZ) were more than 90% under visible light at ambient conditions. Significantly, CTGM was easy to recycle and showed excellent reusability: there was no decrease in the photocatalytic decolorization efficiency of Rh.B throughout 10 cycles. A continuous-flow photocatalysis system was set up and 90% of Rh.B was effectively decolorized. A simple approach was developed to prepare a novel, effective and visible-light-driven membrane that was easy to reuse, and a feasible photocatalysis continuous-flow system was designed to be a reference for wastewater treatment in industry. HIGHLIGHTS TiO2@g-C3N4 was embedded into chitosan through a simple process.; High-efficiency removal of multiple toxic water pollutants under visible light.; CTGM is easy to recycle simply by washing with water.; CTGM presents excellent reusability.; A feasible photocatalysis continuous-flow system was designed.;Shengnan XuGang XiaoZishuai WangYaoqiang WangZiwei LiuHaijia SuIWA Publishingarticlecontinuous-flow photocatalysisimmobilizationmembranetio2@g-c3n4wastewater purificationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 12, Pp 3063-3074 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
continuous-flow photocatalysis immobilization membrane tio2@g-c3n4 wastewater purification Environmental technology. Sanitary engineering TD1-1066 |
| spellingShingle |
continuous-flow photocatalysis immobilization membrane tio2@g-c3n4 wastewater purification Environmental technology. Sanitary engineering TD1-1066 Shengnan Xu Gang Xiao Zishuai Wang Yaoqiang Wang Ziwei Liu Haijia Su A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| description |
Photocatalysis has been proved to be a promising approach in wastewater purification. However, it is hard to recycle powdery photocatalysts from wastewater in industry, but immobilizing them using larger materials can overcome this drawback. For that reason, TiO2@g-C3N4 was embedded into chitosan to synthesize a highly reusable and visible-light-driven chitosan/TiO2@g-C3N4 nanocomposite membrane (CTGM). CTGM showed enhanced photoactivity and the photocatalytic efficiencies of the toxic water pollutants methyl orange (M.O.), rhodamine B (Rh.B), chromium (VI) (Cr (VI)), 2,4-dichlorophenol (2,4-DCP) and atrazine (ATZ) were more than 90% under visible light at ambient conditions. Significantly, CTGM was easy to recycle and showed excellent reusability: there was no decrease in the photocatalytic decolorization efficiency of Rh.B throughout 10 cycles. A continuous-flow photocatalysis system was set up and 90% of Rh.B was effectively decolorized. A simple approach was developed to prepare a novel, effective and visible-light-driven membrane that was easy to reuse, and a feasible photocatalysis continuous-flow system was designed to be a reference for wastewater treatment in industry. HIGHLIGHTS
TiO2@g-C3N4 was embedded into chitosan through a simple process.;
High-efficiency removal of multiple toxic water pollutants under visible light.;
CTGM is easy to recycle simply by washing with water.;
CTGM presents excellent reusability.;
A feasible photocatalysis continuous-flow system was designed.; |
| format |
article |
| author |
Shengnan Xu Gang Xiao Zishuai Wang Yaoqiang Wang Ziwei Liu Haijia Su |
| author_facet |
Shengnan Xu Gang Xiao Zishuai Wang Yaoqiang Wang Ziwei Liu Haijia Su |
| author_sort |
Shengnan Xu |
| title |
A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| title_short |
A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| title_full |
A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| title_fullStr |
A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| title_full_unstemmed |
A reusable chitosan/TiO2@g-C3N4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| title_sort |
reusable chitosan/tio2@g-c3n4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/3bb3508250d3448585b46eb06061575c |
| work_keys_str_mv |
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