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Properties of photocatalytically generated oxygen species produced by Ag2Se-graphene oxide heterojunction and its application for the visible-light degradation of ammonia

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Abstract

Reactive oxygen species (ROS) can be produced by the interactions between sunlight and light-absorbing substances in aqueous environments, and these ROS are capable of destroying various organic pollutants in wastewater. In this study, the photocatalytic degradation of ammonia in petrochemical wastewater was investigated by solar light photocatalysis. We used graphene oxide modified Ag2Se nanoparticles to enhance the activity of photochemically generated oxygen (PGO) species. There was a catastrophic decrease in the surface area and pore volume of the Ag2Se-graphene oxide (Ag2Se-G) samples because of the deposition of Ag2Se. The generation of ROS was detected by the oxidation of 1,5- diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). It was revealed that the photocurrent density and PGO effect increased with the graphene oxide modified. The experimental results indicate that this heterogeneous catalyst achieved a degradation of 88.43% under visiblelight irradiation. The NH3 degradation product was N2 and neither NO2− nor NO3− were detected.

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Author notes

  1. Equal contribution as the first author.

Authors and Affiliations

  1. Jiangsu Key Laboratory of Environmental Functional Materials, College of Chemistry and Bioengineering, Suzhou University of Science and Technology, Suzhou, 215009, China

    Ze-Da Meng

  2. School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 38541, Korea

    Wei Zhao & Sukyoung Kim

Authors
  1. Ze-Da Meng
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  2. Wei Zhao
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  3. Sukyoung Kim
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Correspondence to Ze-Da Meng or Sukyoung Kim.

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Meng, ZD., Zhao, W. & Kim, S. Properties of photocatalytically generated oxygen species produced by Ag2Se-graphene oxide heterojunction and its application for the visible-light degradation of ammonia. Electron. Mater. Lett. 13, 518–526 (2017). https://doi.org/10.1007/s13391-017-6391-3

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  • DOI: https://doi.org/10.1007/s13391-017-6391-3

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