New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel
Photocathodic protection is an economical and environmental metal anticorrosion method. In this research, we successfully synthesized the g-C3N4/GO (15 wt%)/MoS2 catalytic materials by a facile hydrothermal method. The results show that the as-prepared g-C3N4/GO (15 wt%)/MoS2 composites prominently...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-08-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/84/3/499 |
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| author | Hongai Zheng Xin Sun Yue Liu Shuangyan Jiang Derui Wang Yankun Fan Lili Hu Daquan Zhang Weifeng Yao Lizhi Zhang |
| author_facet | Hongai Zheng Xin Sun Yue Liu Shuangyan Jiang Derui Wang Yankun Fan Lili Hu Daquan Zhang Weifeng Yao Lizhi Zhang |
| author_sort | Hongai Zheng |
| collection | DOAJ |
| description | Photocathodic protection is an economical and environmental metal anticorrosion method. In this research, we successfully synthesized the g-C3N4/GO (15 wt%)/MoS2 catalytic materials by a facile hydrothermal method. The results show that the as-prepared g-C3N4/GO (15 wt%)/MoS2 composites prominently enhanced photocatalytic activities for the photocathodic protection of 304 stainless steel (SS) compared with the corresponding pristine g-C3N4 and MoS2. Notably, the AC impedance results demonstrated that the Rct value of 304 SS coupled with g-C3N4/GO (15 wt%)/MoS2 decreased to 35.66 Ω•cm2, which is 29 and 37 times lower than that of g-C3N4 and MoS2 alone. In addition, g-C3N4/GO (15 wt%)/MoS2 provided the highest current density (77.19 μA•cm2) for the 304 SS, which is four times that of pristine g-C3N4. All results indicate that as-prepared g-C3N4/GO (15 wt%)/MoS2 photocatalysts have produced a distinct enhancement on photocathodic protection performance. An optimum decorating amount of MoS2 onto g-C3N4 forms heterojunctions of g-C3N4/MoS2, which favor the separation of electrons and holes efficiently. Furthermore, the addition of GO further promotes the separation and transfer of photo-induced carriers. HIGHLIGHTS
g-C3N4/GO/MoS2 photocatalytic activity was enhanced to protect 304 stainless steel.;
The absorption boundary of g-C3N4/GO/MoS2 was red-shifted toward the visible area.;
The photo-induced carriers’ recombination of g-C3N4/GO/MoS2 was inhibited.;
The 304 stainless steel was effectively protected when coupled to a photo-anode.; |
| first_indexed | 2024-12-20T18:44:51Z |
| format | Article |
| id | doaj.art-7888337ae7124f95983bd975da4ded3a |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-20T18:44:51Z |
| publishDate | 2021-08-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-7888337ae7124f95983bd975da4ded3a2022-12-21T19:29:44ZengIWA PublishingWater Science and Technology0273-12231996-97322021-08-0184349951110.2166/wst.2021.235235New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steelHongai Zheng0Xin Sun1Yue Liu2Shuangyan Jiang3Derui Wang4Yankun Fan5Lili Hu6Daquan Zhang7Weifeng Yao8Lizhi Zhang9 College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China Department of Production Safety, Shanghai Waterworks Fengxian Co., LTD, Shanghai 201499, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China Department of Orthopedic Surgery, ShangHai YangPu District Central Hospital, YangPu Hospital Affiliated to TongJi University, No. 450 TengYue Road, Shanghai 200090, China Photocathodic protection is an economical and environmental metal anticorrosion method. In this research, we successfully synthesized the g-C3N4/GO (15 wt%)/MoS2 catalytic materials by a facile hydrothermal method. The results show that the as-prepared g-C3N4/GO (15 wt%)/MoS2 composites prominently enhanced photocatalytic activities for the photocathodic protection of 304 stainless steel (SS) compared with the corresponding pristine g-C3N4 and MoS2. Notably, the AC impedance results demonstrated that the Rct value of 304 SS coupled with g-C3N4/GO (15 wt%)/MoS2 decreased to 35.66 Ω•cm2, which is 29 and 37 times lower than that of g-C3N4 and MoS2 alone. In addition, g-C3N4/GO (15 wt%)/MoS2 provided the highest current density (77.19 μA•cm2) for the 304 SS, which is four times that of pristine g-C3N4. All results indicate that as-prepared g-C3N4/GO (15 wt%)/MoS2 photocatalysts have produced a distinct enhancement on photocathodic protection performance. An optimum decorating amount of MoS2 onto g-C3N4 forms heterojunctions of g-C3N4/MoS2, which favor the separation of electrons and holes efficiently. Furthermore, the addition of GO further promotes the separation and transfer of photo-induced carriers. HIGHLIGHTS g-C3N4/GO/MoS2 photocatalytic activity was enhanced to protect 304 stainless steel.; The absorption boundary of g-C3N4/GO/MoS2 was red-shifted toward the visible area.; The photo-induced carriers’ recombination of g-C3N4/GO/MoS2 was inhibited.; The 304 stainless steel was effectively protected when coupled to a photo-anode.;http://wst.iwaponline.com/content/84/3/499graphitic carbon nitrideheterojunctionphotocathodic protectionphotoelectrochemical |
| spellingShingle | Hongai Zheng Xin Sun Yue Liu Shuangyan Jiang Derui Wang Yankun Fan Lili Hu Daquan Zhang Weifeng Yao Lizhi Zhang New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel Water Science and Technology graphitic carbon nitride heterojunction photocathodic protection photoelectrochemical |
| title | New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel |
| title_full | New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel |
| title_fullStr | New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel |
| title_full_unstemmed | New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel |
| title_short | New g-C3N4/GO/MoS2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel |
| title_sort | new g c3n4 go mos2 composites as efficient photocatalyst for photocathodic protection of 304 stainless steel |
| topic | graphitic carbon nitride heterojunction photocathodic protection photoelectrochemical |
| url | http://wst.iwaponline.com/content/84/3/499 |
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