Photocatalytic Degradation of Methylene Blue and Methyl Orange by Y-PTC Metal-Organic Framework

Abstract

The yttrium based metal-organic framework (MOF) Y-PTC was synthesized by the solvothermal method using perylene as the linker and yttrium as metal ion. This study aims to assess the photocatalytic activity of yttrium-perylenetetracarboxylate (Y-PTC) metal-organic framework (MOF) toward methylene blue and methyl orange under visible light irradiation. The results of the FTIR analysis showed that Y-PTC MOF had a different structure and composition from its precursor (Na4PTC). The Y-PTC MOF has a bandgap energy value of 2.20 eV with a surface area of 47.7487 m2/g. The SEM-EDS analysis showed an elemental composition of yttrium, carbon, and oxygen, were 6.9%, 72.1% and 20.7%, respectively. Furthermore, Y-PTC MOF was able to adsorb dyes at the optimum by 78.10% and 35.57% toward methylene blue (MB) and methyl orange (MO) at the dispersion period of 60 mins. Y-PTC MOF exhibited photocatalytic activity towards the degradation of methylene blue and methyl orange under visible light irradiation. The addition of H2O2 inhibited Y-PTC photocatalytic activity towards MO degradation from 50.89% to 26.38%. In contrast to MO, the addition of H2O2 had a positive effect on MB, which increased the degradation from 87.56% to 91.65%. Therefore, Y-PTC MOF possessed the potential of a photocatalyst material in dyes degradation under visible light irradiation.

Synthesis Glycine-Modulated Metal Organic Framework Cr-PTC-Gly for Synergetic Methylene Blue Adsorption and Photodegradation under Visible Light Irradiation

“…At 2500-3300 cm -1 in the IR spectrum of Na4PTC, no absorbance band was found for the -OH group. It confirmed that PTCDA reacts completely with four equivalents of NaOH to form Na4PTC (Adawiah et al, 2021).…”

“…The bands at 1753 and 1730 cm -1 attributed to asymmetric and symmetric stretching vibrations (C=O) of PTCDA 5-member ring cyclic anhydride. The sharp peak at 1234 cm -1 confirmed asymmetric stretching vibration (C-O), and 938 cm -1 identified the symmetric stretching vibration (C-O) of the C-CO-O-CO-C-group in the cyclic anhydride compound of PTCDA (Adawiah et al, 2021). Figure 1 also shows that the five bands of the cyclic anhydride group of the PTCDA no longer appear in the IR spectrum of Na4PTC.…”

Synthesis of Bimetallic Metal-Organic Frameworks (MOFs) La-Y-PTC for Enhanced Dyes Photocatalytic Degradation

“…required by photocatalyst materials for photocatalytic processes [12]. Figure 4 fer much, namely 1.16 Å and 1.01 Å and are in one group [22].…”

“…Figure 3 shows the pattern of the La-Y-PTC diffractogram in which there are several dif-fraction peaks, including at 2θ = 5.69°, 9.57°, 16.8°; 20.05°; 24.8°, 26.15°; 29.77° and 41.93°. Meanwhile, the diffraction pattern with the highest intensity produced by La-PTC is at 2θ = 6.31º, 16.6º, 28.7º, 33.3º and 44.6º [11], while the diffraction pattern of Y-PTC is at 2θ= 17.04º, 26.27º, and 27.41º [12]. The difference in the absorption peak value indicates the difference in the crystal structure of the MOFs La-Y-PTC.…”

“…Zulys et al synthesized La-PTC MOFs, which degraded only methyl orange 10 ppm by 64.74% for 240 min under visible light irradiation [11]. Adawiah et al succeeded in synthesizing Y-PTC, which can degrade methylene blue 10 ppm and methyl orange 10 ppm by 62.57% and 50.89%, respectively, for 240 min on mercury lamp irradiation [12].…”