(536f) Constructing Fenton-like Reaction over g-C3N4/NH2-MIL-88B(Fe) Photocatalyst to Degrade Organic Contamination in Aqueous Solution

Constructing Fenton-like Reaction over
g-C₃N₄/NH₂-MIL-88B(Fe) Photocatalyst to Degrade Organic Contamination in
Aqueous solution

Xiyi Li, Yunhong
Pi, Zhong Li, Jing Xiao*

Efficient
generation of active radicals plays a key role in advanced oxidation process
(AOPs) for the degradation of organic contamination from aqueous solution. To
facilitate the Fenton-like process, the NH₂-Iron terephalate
metal-organic framework is incorporated with carbon nitride in order to
effectively covert H₂O₂ to highly reactive hydroxyl
radical (•OH). The formation of •OH can be promoted via two paths, one is the
Fe³⁺ in the framework acts as the trigger to convert H₂O₂
generated by the reaction between O₂ and g-C₃N₄,
the other one is the heterojunction leads to the efficient transfer of
photo-induced electrons to participate in the Fenton-like reaction with the
addition of H₂O₂. The synergistic index in the
lp-2/visible-light/H₂O₂system reached as high as 305%.
The mechanism was illustrated through Electron spin resonance (ESR) spectra, as
shown in Figure 1 and 2. Moreover, under visible light irradiation, the
Fenton-like photocatalyst exhibit excellent degradation efficiency of MB,
salicylic acid and phenol, as shown in Figure 3. This strategy of coupling
metal-organic framework with carbon nitrides for Fenton-like process provides a
useful and promising solution for the remediation of aqueous organic pollution
under visible light irradiation.

Keywords:
Fenton-like Reaction; photocatalytic degradation; visible light