Response surface methodology: photodegradation of methyl orange by CuO/ZnO under UV light irradiation
Journal Title: Asian Journal of Green Chemistry - Year 2019, Vol 3, Issue 2
Abstract
Zinc oxide (ZnO) and copper oxide doped zinc oxide photocatalysts (CuO/ZnO) were synthesized by precipitation method. The effect of CuO loading on the physicochemical properties and photocatalytic performance of ZnO in photodegrading methyl orange dye solution (MO) was investigated. The produced ZnO has a crystallite size of 61.1 nm, surface area of 4.43 nm2/g and band gap energy of 3.30 eV. After doping with 0.8% CuO, the crystallite size decreased to 19.4 nm while the surface area increased to 8.2 mm2/g. The band gap energy, however, remained the same indicating that low CuO content did not affect the optical properties of ZnO. The efficiency of the photocatalystsin photodegrading MO was evaluated under different conditions. Photocatalytic activities showed that the highest removal of 54.1% was achieved when 5 ppm of MO solution was degraded by 0.6 g of 0.8% CuO/ZnO at pH 6.8. The response surface methodology (RSM) was employed to develop a quadratic model as a functional relationship between the amounts of the degraded MO (mg/g) and three experimental factors (mass loading, MO initial concentration and MO initial pH). The highest amount of the degraded MO was 12.8 mg/g when 0.2 g of 0.8% CuO doped ZnO was used in 5 ppm MO at pH 5.
Authors and Affiliations
Siti Nur Surhayani Jefri, Abdul Halim Abdullah, Ernee Noryana Muhamad
Keywords
Related Articles
- EP ID EP468925
- DOI 10.22034/ajgc.2018.135387.1078
- Views 85
- Downloads 0
Propargylation of indole under a new dual-site phase-transfer catalyst: A kinetic study
A new multi-site phase-transfer catalyst viz., N,N’-dihexyl-4,4’-bipyridinium dibromide (DSPTC) was synthesized from the low cost starting materials. The structures of the synthesized DSPTC and 1-(prop-2-ynyl)-1H-indole...
Quantitative structure activity relationship (QSAR) study of octanol-water partition coefficients of some of environmental toxic of petroleum substances
Life and its extraction fuels climate change. We performed studies upon an extended series of petroleum hydrocarbons, with octanol-water partition coefficients (log Kow), by using the quantitative structure-activity rela...
Response surface methodology: photodegradation of methyl orange by CuO/ZnO under UV light irradiation
Zinc oxide (ZnO) and copper oxide doped zinc oxide photocatalysts (CuO/ZnO) were synthesized by precipitation method. The effect of CuO loading on the physicochemical properties and photocatalytic performance of ZnO in p...
Extraction and purification of phycocyanin from spirulina platensis and evaluating its antioxidant and anti- inflammatory activity
Phycocyanin is a blue pigment and water-soluble biliprotein from the spirulina platensis. It has great medical and medicinal properties and has been used as a nutritional supplements. Phycocyanin is also a natural and po...
One-pot route to nitriles from aldehyde and hydroxylamine hydrochloride on silica-gel
A green and facile methodology for the synthesis of nitrile has been established from the corresponding aldehydes and hydroxylamine hydrochloride on silica-gel in hot condition. The protocol is equally effective for alip...