Facile post-synthesis and photocatalytic activity of N-doped ZnO-SBA-15

Vien Vo, Thu Phuong Tran Thi, Ha Yeong Kim, Sung Jin Kim

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

N-doped ZnO-SBA-15 materials (denoted as nN-xZnO-SBA-15, where n is number of urea treatments and x is the weight ratio of ZnO/(ZnO+SBA-15)) were successfully synthesized by a two-step procedure. First, xZnO-SBA-15 was prepared by impregnating SBA-15 with Zn(NO3)2, followed by calcinating at 550 C. In the second step, xZnO-SBA-15 was modified n times by doping nitrogen with the assistance of urea. The resulting nN-xZnO-SBA-15 materials prepared with various numbers of urea treatments were characterized by XRD, TEM, SEM, EDS, N2 adsorption/desorption at 77 K, diffuse reflectance UV-vis, and XPS. The results show that the nN-xZnO-SBA-15 maintains its ordered hexagonal mesostructure and exhibits light absorbance in the visible region. The nN-xZnO-SBA-15 samples were investigated with the photodegradation of methylene blue under visible light, and exhibited significant photocatalytic activity. The kinetics of the reaction obeyed the Langmuir-Hinshelwood model.

Original languageEnglish
Pages (from-to)403-409
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume75
Issue number3
DOIs
StatePublished - Mar 2014

Keywords

  • A: Nanostructures
  • B: Semiconductors
  • C: Sol-gel growth
  • D: X-ray diffraction
  • E: Optical properties

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