Oxygen-rich TiO 2 decorated with C-Dots: Highly efficient visible-light-responsive photocatalysts in degradations of different contaminants

Solmaz Feizpoor, Aziz Habibi-Yangjeh, Iraj Ahadzadeh, Kunio Yubuta

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Providing novel photocatalysts with high photocatalytic efficiency is of great significance. In the present work, hydrogen peroxide and carbon dots (C-Dots) were utilized to enhance the photocatalytic performance of TiO 2 under visible light. The fabricated TiO 2 -peroxo/C-Dots photocatalysts were analyzed by XRD, HRTEM, SEM, EDX, BET, FT-IR, XPS, PL, UV–Vis DRS, EIS, and photocurrent density. Photocatalytic abilities of the nanocomposites were evaluated by photocatalytic removal of RhB, MO, MB, fuchsine, and Cr (VI) upon visible-light illumination. The results demonstrated that the binary nanocomposites exhibited remarkably enhanced photocatalytic activity compared with the TiO 2 and TiO 2 -peroxo photocatalysts. The best photocatalytic performance was obtained using 0.75 mL of C-Dots, which was approximately 79.2, 17.1, 71.4, and 40.5 times higher than the pure TiO 2 for degradations of RhB, MO, MB, and fuchsine, respectively. Furthermore, the TiO 2 -peroxo/C-Dots nanocomposites exhibited high stability in consecutive photocatalytic processes. Based on the results, the TiO 2 -peroxo/C-Dots photocatalyst is expected to become a promising photocatalyst for practical applications in water purification.

Original languageEnglish
Pages (from-to)1183-1196
Number of pages14
JournalAdvanced Powder Technology
Volume30
Issue number6
DOIs
Publication statusPublished - Jun 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanics of Materials

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