Photocatalytic removal using g-C 3 N 4 quantum dots/Bi 2 Ti 2 O 7 composites

Tao Wang, Xiqing Liu, Qiuyue Men, Wei Ma, Zhi Liu, Yang Liu, Changchang Ma, Pengwei Huo, Yongsheng Yan

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

In this work, a simple method to load of g-C 3 N 4 quantum dots (CN QDs) onto Bi 2 Ti 2 O 7 (BTO) microsphere with the amount of CN QDs (3, 7, 10 and 15%). The photocatalyst was used for the treatment of water pollutants under visible-light illumination, which proved that CNBTO composites showed improved photocatalytic activity matched up to pure BTO. Reformation of BTO with CN QDs enhanced the light assimilation capacity, and promoted the isolation of photo-induced electron-hole pairs. The trapping experiments and ESR were announced the holes (h + ) and superoxide oxide (O 2 [rad] ) played the key role, and the relative mechanism of the photocatalytic process was proposed. Meanwhile, the effects of CN QDs content, pH and initial pollutant concentration on the removal efficiency of ciprofloxacin (CIP) were studied. Results showed that the CN QDs loaded on BTO presented higher photocatalytic efficiency, and an optimum value for the dosage of photocatalytic in pH 8.0.

Original languageEnglish
Pages (from-to)19-27
Number of pages9
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume213
DOIs
StatePublished - 15 Apr 2019
Externally publishedYes

Keywords

  • Bi Ti O microsphere
  • Ciprofloxacin
  • g-C N quantum dots
  • Photocatalytic performance

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