Photodegradation of odorous 2-mercaptobenzoxazole through zinc oxide/hydroxyapatite nanocomposite

Abstract

In this study, ZnO/HAP nanocomposite with excellent photocatalytic activities was successfully synthesized by sol-gel method and used for degradation of 2-mercaptobenzoxazole (MBO) as model of odorous mercaptan compound in water. To optimize the performance of ZnO/ HAP photocatalytic capabilities, ZnO/HAP loading (0.05-0.3 g/L), irradiation time (15-180 min), pH (3-11) and initial concentration of MBO (10-100 ppm) were investigated. At neutral pH of 7, the highest amount of the MBO (99.45 %) was degraded by ZnO/HAP nanocomposite through photocatalytic oxidation process within 2 h of irradiation time. ). TEM image demonstrated a spherical shape structure of ZnO/HAP with average particle size of 25 nm in diameter. The XRD patterns revealed the principal components of ZnO/HAP including HAP and ZnO. FTIR spectrum results supported formation ZnO and HAP by their stretching mode in composite. Comparison of photocatalytic activity of ZnO/HAP with pure ZnO and HAP nanoparticles had clearly recognized that latter is the most active photocatalyst in the degradation of MBO using UV light as source energy. The reason for greater activity of ZnO/HAP was due to its larger specific surface area (182.36 m

Phycosynthesis and Enhanced Photocatalytic Activity of Zinc Oxide Nanoparticles Toward Organosulfur Pollutants

“…To highlight the potential catalytic efficiency of green ZnO NPs toward environmental remediation and avoid the water pollution; photodegradation experiments of DBT aqueous solution was investigated under UV light irradiation in a homemade batch-type photoreactor which has been previously described in detail by our research group 37 . Under optimum preparation conditions (see Supplementary), typically 20 mL sample of wastewater comprising 0.01 g of nanophotocatalyst and 10 ppm of DBT with neutral pH of 7 was placed into the reactor.…”

Facile one‐pot phytosynthesis of magnetic nanoparticles using potato extract and their catalytic activity

“…Intermolecular hydrogen bonding occurs between OH‐2 and the neighboring O‐6 of the D‐glucopyranosyl residues on different molecules, while, an intramolecular hydrogen bonding usually takes place between OH‐6 and the adjacent hemiacetal oxygen atom of the D‐glucopyranosyl residues . Hence, following our previous studies on NPs , in this communication, we explored a facile, green, low‐cost, and homemade route synthesis of durable magnetite NPs via starch‐rich potato extract, without any additives such as reducing agent, acids, and organic solvents. According to the literature review, phytosynthesis of pure magnetite NPs was reported for the first time, utilizing starch‐rich potato extract as a stabilizing and reducing agent.…”

Efficacy of biomaterial based photocatalytic composite in treating dye pollutants

“…without illumination) and absorbance aftert time illumination provided the % of photodegradation which ultimately disclosed the efficiency of the composite. Following equation (Buazar et al 2015;Ahmed et al 2011) was used to calculate the % of degradation.…”