Abstract
In the present study, we explored the effectiveness of PES-Ag3PO4/g-C3N4 film photocatalyst in degrading methyl orange dye under visible light irradiation. The PES-Ag3PO4/g-C3N4 film photocatalyst was prepared via a non-solvent-induced phase inversion process and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser scanning microscopy (LSM), X-ray photoelectron spectra (XPS), UV-diffuse reflectance (DRS), and water contact angle. The incorporation of the Ag3PO4/g-C3N4 composite into the PES matrix improved the pristine PES film’s hydrophilicity, as evidenced by the reduction of water contact angle from 79.03° to 54.33° for a film containing 15 wt % of Ag3PO4/g-C3N4 composite. The film’s photoactivity showed that 13 wt % was the best loading of Ag3PO4/g-C3N4 composite, and the degradation performance was maintained up to three cycles. The •O2− and h+ were the predominant species responsible for the methyl orange degradation.
Highlights
Textile industries wastewater contains many types of dyes and chemical substances that pose an environmental challenge in wastewater disposal issues
The addition of Ag3PO4/g-C3N4 into the PES matrix contributed to the appearance of several Ag3PO4 peaks that was indexed as body-centred cubic phase (JCPDS No 060505), and no other impurities were observed, indicating that the samples were composed of pure phase Ag3PO4
A novel PES-Ag3PO4/g-C3N4 was successfully fabricated by the phase inversion technique
Summary
Textile industries wastewater contains many types of dyes and chemical substances that pose an environmental challenge in wastewater disposal issues. The largest group of synthetic colorants, are usually used in the textile industry. These dyes possess high stability against light, temperature, chemicals, and microbial attack, making conventional wastewater treatment less efficient. The use of traditional physical and chemical methods produces secondary pollutants [1]. Advanced oxidation processes (AOPs) are the technologies that generally use hydroxyl radicals, the ultimate oxidant for remediating organic contaminants in wastewater by converting recalcitrant pollutants into biodegradable compounds. The efficacy of AOPs depends on the generation of reactive free radicals, mainly the hydroxyl radicals. The most favorable AOPs in wastewater treatment include Fenton oxidation [2], catalytic ozonation [3], and semiconductor-based heterogeneous photocatalysis
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