Laser induced photodegradation of Orange G using phthalocyanine – cobalt ferrite magnetic nanoparticle conjugates electrospun in polystyrene nanofibers

BODIPY Dye Embedded Electrospun Polystyrene Nanofibers for the Photocatalytic Degradation of Orange G in Industrial Wastewaters

“…When the inverse of the initial rate was plotted against the inverse of the initial concentration ( Figure 10B), non-linear plots were obtained, so the photodegradation of Orange G does not follow the Langmuir-Hinshelwood kinetic model [23] in contrast with some other recent studies. [6,24] It was therefore not possible to derive the apparent adsorption constant for Orange G on the PS nanofiber surface. The modified fibers were removed from solution after consecutive studies and were covered in aluminum foil for several days so their reusability could be assessed and the rate of degradation was found to be enhanced ( Figure 10 and Table 1).…”

“…[4] In recent years, there has been considerable interest in the use of phthalocyanines, which absorb strongly at the red and blue ends of the visible region, as photocatalysts for the degradation of Orange G in wastewaters. [5,6] The absence of significant absorbance in the green portion of the visible region means that not all of the incident light can be absorbed when white light sources are used, so introducing a second chromophore could further enhance the utility of photosensitizer dye embedded polymer nanofibers for the photodegradation of organic pollutants. In this work, we report the use of 2,6-dibromo-8-pyrenyl-1,3,5,7-tetramethyl-BODIPY (1) ( Figure 1) immobilized on nanofibers as 1 O 2 generating heterogeneous photocatalysts for the mineralization of Orange G. Immobilization of the dye on a solid support provides the advantages of catalysts recovery and recycling unlike in the corresponding homogenous systems.…”

“…In this work, we report the use of 2,6-dibromo-8-pyrenyl-1,3,5,7-tetramethyl-BODIPY (1) ( Figure 1) immobilized on nanofibers as 1 O 2 generating heterogeneous photocatalysts for the mineralization of Orange G. Immobilization of the dye on a solid support provides the advantages of catalysts recovery and recycling unlike in the corresponding homogenous systems. [6] Nanofibers have specific surface area, highly porous, making it possible to immobilize different functional groups on their surfaces. [6][7][8] Polystyrene was chosen for the nanofiber studies because of its resistance to heat, durability and ability to form a stronger π-π interaction with the dye.…”

“…[6] Nanofibers have specific surface area, highly porous, making it possible to immobilize different functional groups on their surfaces. [6][7][8] Polystyrene was chosen for the nanofiber studies because of its resistance to heat, durability and ability to form a stronger π-π interaction with the dye.…”

“…[11] In the triplet excited state, energy from the photoexcited electrons of the dye are transferred to triplet ground state molecular oxygen to generate triplet excited singlet oxygen species that photodegrades the pollutants. [5][6][7] BODIPY dyes have previously been used to modify electrospun fibers, and these modifications did not change the physicochemical properties of the dye. [14] Although the use of BODIPY dyes as photocatalysts in organic transformations has been reported previously, [15] to the best of our knowledge, there have been no previous studies of the potential utility of BODIPY dyes modified nanofibers for the photocatalytic degradation of organic dye pollutants.…”