چکیده
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A new Ag(I) metal–organic framework (Ag-MOF) [Ag(p-OH-C6H4COOH)2(NO3)]n [Ag(PHBA)2(NO3)]n,(1)
(PHBA: C8H6O4{p-hydroxybenzoic acid}) was synthesized using two different methods; the laying method
(single crystal) and sonochemical irradiation (nanostructures). Scanning electron microscopy (SEM),
powder XRD, and FT-IR spectroscopy were used to characterize the materials. The impacts of various
parameters, including the ultrasonic (US) power, reaction time, reactant concentration, and temperature
requirements to reach a controlled synthesis were extensively investigated. Compound 1-5(obtained via
sonochemical irradiation) showed an excellent catalytic activity towards simultaneous photodegradation of
2-methyl-4-chlorophenoxyacetic acid (MCPA) and 2,4-dichlorophenoxyacetic acid (2,4-D) in an aqueous
solution under sunlight irradiation. The response surface methodology (RSM) for the modelization and
optimization of the photodegradation of the MCPA/2,4-D mixture was utilized. The maximum
photodegradation efficiencies for 2,4-D and MCPA (96.0 and 98.0% respectively) were observed under
optimal conditions ofC0=4.5mgL1
, catalyst dose = 0.4 g L
1
, pH = 5.5 and irradiation time = 20 min.
The determined quantum yield of Ag-MOF was 3.21 10
5
molecules per photon with excellent
reusability in terms of the degradation efficiency (e.g., 97% for the first cycle and 86% for the fifth). AgMOF is suggested for the efficient treatment of organic pollutants in wastewater systems.
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