Template-free synthesis of inorganic hollow spheres at water/"water-brother" interfaces as Fenton-like reagents for water treatment

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  • Yingchun Su
  • Shenghua Ma, Harbin Institute of Technology
  • ,
  • Xiaole Zhao, Harbin Institute of Technology
  • ,
  • Mingdong Dong
  • Xiaojun Han, Harbin Institute of Technology

This paper reports a template-free method to synthesize a series of inorganic hollow spheres (IHSs) including Cu-1, Cu-2, Ni-1, Ni-2 based on mineralization reactions at water/"water-brother" interfaces. "Water-brother" was defined as a solvent which is miscible with water, such as ethanol and acetone. The water/"water-brother" interfaces are very different from water/oil interfaces. The "water-brother" solvent will usually form a homogenous phase with water. Interestingly, in our method, these interfaces can be formed, observed and utilized to synthesize hollow spheres. Utilizing the unique porous properties of the spheres, their potential application in water treatment was demonstrated by using Cu-1 IHSs as Fenton-like reagents for adsorption and decomposition of Congo Red from aqueous solution. The final adsorption equilibrium was achieved after 30. min with the maximum adsorption capacity of 86.1. mg/g, and 97.3% removal of the dye in 80. min after adsorption equilibrium. The IHSs can be reused as least 5 times after treatment by NaOH. This method is facile and suitable for large-scale production, and shows great potential for watertreatment.

Original languageEnglish
JournalJournal of Environmental Sciences
Pages (from-to)331-338
Publication statusPublished - May 2017

    Research areas

  • Congo red, Fenton-like reaction, Inorganic hollow spheres, Water/"water-brother" interfaces, Watertreatment

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