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g-C3N4/TiO2 hybrid film on the metal surface, a cheap and efficient sunlight active photoelectrochemical anticorrosion coating

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Abstract

A solar light active photoelectrochemical anticorrosion paint was prepared by dispersing g-C3N4 nanomaterial in 0.05 M TiO(Acac)2 solution. The paint can form uniform film on the metal surface after paralysis, which can provide effective cathodic protection for 304 SS under visible light irradiation. UV–Vis, Powder XRD, IR and EDS characterization identified that the film was composed by g-C3N4 and amorphous TiO2; After coating the g-C3N4/TiO2 film, which has a thickness around 12 um as shown by SEM, a photo-potential up to 0.20 V was observed for the metal specimen under visible light illumination (30mW/cm2) in 3% NaCl solution. The photo-potential can be accumulated with the irradiation time and held for many hours after removing the light illumination. Effective full-day cathodic protection for 304 SS can be provided by this g-C3N4/TiO2 coating.

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Acknowledgement

We thanks the financial support from NSF of China (21602258), Central South University (502035002, 502044001), Talents Program of Hunan Province, Natural Science Foundation of Hunan Province (2017JJ3400). D. D. thanks the financial support from the State Grid.

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Author notes

  1. De Ding and Qiankun Hou have contributed equally to this work.

Authors and Affiliations

  1. Shaanxi Electric Power Research Institute, Xi’an, 710054, Shanxi, China

    De Ding, Yaoguo Su & Lei Liu

  2. Central South University, College of Chemistry and Chemical Engineering, Changsha, 410083, Hunan, China

    Qiankun Hou, Qianqian Li, Jiang Jing & Yin Chen

  3. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, Sichuan, China

    Bin Lin

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  1. De Ding
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  2. Qiankun Hou
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Correspondence to Bin Lin or Yin Chen.

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Ding, D., Hou, Q., Su, Y. et al. g-C3N4/TiO2 hybrid film on the metal surface, a cheap and efficient sunlight active photoelectrochemical anticorrosion coating. J Mater Sci: Mater Electron 30, 12710–12717 (2019). https://doi.org/10.1007/s10854-019-01635-z

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