(510c) Cobalt-Based ZIF Coordinated Hybrids with Defective TiO2-x Forboosting Visible Light-Driven Photo-Fenton-like Degradation of Bisphenol a
AIChE Annual Meeting
2021
2021 Annual Meeting
Environmental Division
Poster Session: Environmental Division
Wednesday, November 10, 2021 - 3:30pm to 5:00pm
Designing heterostructure of photocatalyst as an efficient approach to boost visible light-driven photocatalytic
degradation, we prepared a series of cobalt-based ZIF coordinated with defective TiO2-x,
denoted as B-TiO2-x@ZIF-67 composites, through wrapping defective B-TiO2-x on ZIF-67 for promoting
photocatalytic degradation efficiency of biphenyl A. The B-TiO2-x@ZIF-67 composites displayed superior
photocatalytic performance to pure TiO2-x or ZIF-67 because of faster separation of photogenerated
charge carriers and more suitable redox potentials. Such a novel photo-Fenton-like system composed of
B-TiO2-x@ZIF-67/H2O2/visible light accelerated the peroxidative degradation of biphenyl A up to a
removal efficiency of 95.30%, which is also higher than that of photocatalysis or Fenton-like reaction
alone. In addition, the degradation efficiency of biphenyl A is unchanged after catalyst reuse of four
cycles. Integrating the trapping experiments and electrochemical analysis, we found the oxygen vacancy
on BeTiO2-x capturing the electrons to promote the separation of photogenerated charges, meanwhile
the Co(II) in the composite decomposed hydrogen peroxide (H2O2) to produce more OH radical. Both of
them mutually boosted the removal efficiency. Finally, feasible degradation pathways of biphenyl A were
proposed based on the assay of LC-MS spectrometry. This strategy offers a novel insight into fabrication
of Co-ZIF-based TiO2-x materials and application to visible light-driven photocatalytic and Fenton-like
degradation reaction.
degradation, we prepared a series of cobalt-based ZIF coordinated with defective TiO2-x,
denoted as B-TiO2-x@ZIF-67 composites, through wrapping defective B-TiO2-x on ZIF-67 for promoting
photocatalytic degradation efficiency of biphenyl A. The B-TiO2-x@ZIF-67 composites displayed superior
photocatalytic performance to pure TiO2-x or ZIF-67 because of faster separation of photogenerated
charge carriers and more suitable redox potentials. Such a novel photo-Fenton-like system composed of
B-TiO2-x@ZIF-67/H2O2/visible light accelerated the peroxidative degradation of biphenyl A up to a
removal efficiency of 95.30%, which is also higher than that of photocatalysis or Fenton-like reaction
alone. In addition, the degradation efficiency of biphenyl A is unchanged after catalyst reuse of four
cycles. Integrating the trapping experiments and electrochemical analysis, we found the oxygen vacancy
on BeTiO2-x capturing the electrons to promote the separation of photogenerated charges, meanwhile
the Co(II) in the composite decomposed hydrogen peroxide (H2O2) to produce more OH radical. Both of
them mutually boosted the removal efficiency. Finally, feasible degradation pathways of biphenyl A were
proposed based on the assay of LC-MS spectrometry. This strategy offers a novel insight into fabrication
of Co-ZIF-based TiO2-x materials and application to visible light-driven photocatalytic and Fenton-like
degradation reaction.