Current perspective of nano-engineered metal oxide based photocatalysts in advanced oxidation processes for degradation of organic pollutants in wastewater

A pragmatic review on photocatalytic degradation of methyl orange dye pollutant using greenly biofunctionalized nanometallic materials: A focus on aquatic body

“…In recent times, several reviews 2,8,32,75–125 have been published on the photocatalytic degradation of various dye pollutants in an aquatic medium using different nanomaterials. However, only a few 2–4,77,81,82,86,91,96,102,123,124 focus on the biosynthesized NPs for the dye photodegradation application.…”

Improved visible light-driven photocatalytic degradation of an industrial dye Acid Orange 7 using metal-free sulfur-doped graphitic carbon nitride

“…16 To date, several semiconductor nanomaterials containing metal oxides (ZnO, TiO 2 , WO 3 , and CeO 2 ) and metal sulfides (AgS 2 , MoS 2 , and CdS) have been widely synthesized. 14,17,18 These nanomaterials exhibit better photocatalytic performance in the UV region, the smallest part of the light spectrum. Their practical applications in photocatalysis remain a challenge due to their poor light absorption in the visible region, poor stability, wide bandgap, and electron-hole pair recombination at a high rate, which results in the insufficient creation of superoxide and hydroxyl radicals and lower degradation efficiency.…”

“…Their practical applications in photocatalysis remain a challenge due to their poor light absorption in the visible region, poor stability, wide bandgap, and electron-hole pair recombination at a high rate, which results in the insufficient creation of superoxide and hydroxyl radicals and lower degradation efficiency. 17,19 Morever, there has been a growing emphasis on developing sustainable strategies to combat these challenges, and the utilization of abundant and renewable solar light is widely recognized as a pivotal solution to addressing environmental pollution challenges. 20 GCN or g-C 3 N 4 , a metal-free semiconductor photocatalyst, has received much attention recently due to its unusual chemical and thermal properties and improved visible light absorption response.…”

Enhanced degradation of ibuprofen in an integrated constructed wetland-microbial fuel cell: treatment efficiency, electrochemical characterization, and microbial community dynamics

“…Due to antibiotics' substantial presence and high bioaccumulation capability in aquatic environments, several advanced oxidation technologies, including Fenton, UV–H 2 O 2 , ozone, and electrochemical-based oxidation, have been extensively proposed to remove them from different waste streams. 15–18 However, due to the high cost and limited selectivity of the advanced oxidation processes, advanced biological wastewater treatment technologies have gained more attention for antibiotic breakdown. 19–21 Although currently used biological WWTPs (such as membrane bioreactors and conventional activated sludge) exhibit high efficiency ( i.e.…”