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Synthesis of BiOI/ZnFe2O4-Metal-Organic Framework and g-C3N4-Based Nanocomposites for Applications in Photocatalysis

Khasevani, S. G ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.iecr.8b05871
  3. Publisher: American Chemical Society , 2019
  4. Abstract:
  5. A novel binary BiOI/ZnFe2O4 (BZ) with p-n heterojunction based on the different metal-organic framework (MOF) MIL-88B(Fe) and graphite carbon nitride (g-C3N4) as substrates has been designed. As-prepared ternary nanocomposites have been first obtained via a simple hydrothermal system and subsequently deposited onto the MOF and g-C3N4 substrates. The photoactivity of the ternary nanocomposites was evaluated by organic pollutants degradation under LED light. These characterization results indicated that BiOI as a p-type semiconductor was well deposited on the surface of ZnFe2O4 (n-type semiconductors). The p-n heterojunction photocatalyst (BZ) improved the valence band potential of ZnFe2O4 and enhanced the removal efficiency compared to the ZnFe2O4 and BiOI. The electron-accepting and transporting properties of MOF and g-C3N4 have illustrated the excellent suppression of the recombination of e-/h+ pairs thereby promoting organic dye degradation. On the basis of the electrical analysis (EIS) and photocurrent, it can be found that the enhanced charge carrier transfer of g-C3N4 correlates with the photoactivity. The results showed that •O2- and •OH as reactive oxygen species have a key role in the toxic dyes and phenol decomposition under LED light. © 2019 American Chemical Society
  6. Keywords:
  7. Bismuth compounds ; Carbon nitride ; Crystalline materials ; Heterojunctions ; Iron compounds ; Nanocomposites ; Organic light emitting diodes (OLED) ; Organic pollutants ; Organic polymers ; Organometallics ; Semiconducting bismuth compounds ; Substrates ; Charge carrier transfer ; Metal organic framework ; N-type semiconductors ; Phenol decomposition ; Reactive oxygen species ; Removal efficiencies ; Ternary nanocomposites ; Valence band potential ; Semiconducting zinc compounds
  8. Source: Industrial and Engineering Chemistry Research ; Volume 58, Issue 23 , 2019 , Pages 9806-9818 ; 08885885 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acs.iecr.8b05871