High-efficiency removal of rhodamine B dye in water using g-C3N4and TiO2co-hybridized 3D graphene aerogel composites

Jing Jie Zhang, Su Su Fang, Jin Ya Mei, Guangping Zheng, Xiu Cheng Zheng, Xin Xin Guan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

37 Citations (Scopus)

Abstract

The graphitic carbon nitride-titanium dioxide-graphene aerogel (g-C3N4-TiO2-GA) composites were facilely assembled by a hydrothermal approach combined with freeze drying. The adsorptivity for rhodamine B (RhB, 20.0 mg L−1, 25 mL) within 1 h over 5.0 mg of the composites was as high as 96.5% in dark and could be up to 98.4% under visible light irradiation. Furthermore, the resulting composites also displayed satisfactory cyclic stability and the removal efficiency could be 75.6% even after four cycles of removal. In addition, a photocatalytic mechanism was proposed for the composite. The result demonstrated that the g-C3N4-TiO2-GA composites could be effectively used for the elimination of organic dyes under visible light irradiation because of their unique 3D hierarchical porous structure and the synergistic effect among the components.
Original languageEnglish
Pages (from-to)96-103
Number of pages8
JournalSeparation and Purification Technology
Volume194
DOIs
Publication statusPublished - 3 Apr 2018

Keywords

  • Adsorption
  • g-C N -TiO -graphene aerogel 3 4 2
  • Photocatalysis
  • Rhodamine B
  • Visible light

ASJC Scopus subject areas

  • Analytical Chemistry
  • Filtration and Separation

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