Photocatalytic degradation of Orange G dye under solar light using nanocrystalline semiconductor metal oxide

Abstract

The adsorption of dye onto catalytic surface was analysed employing model equations such as Langmuir and Freundlich isotherms, and it was found that the Langmuir isotherm model best fitted the adsorption data. The solar photodegradation of OG followed pseudo-first-order kinetics. HPLC and ESI-Mass analyses of the degraded samples suggested that the dye molecules were readily degraded under solar irradiation with nanocrystalline ZnO.

Facile Synthesis of Magnesium Oxide Nanoparticles for Studying Their Photocatalytic Activities Against Orange G Dye and Biological Activities Against Some Bacterial and Fungal Strains

“…These intermediate products arise from the random attack of hydroxyl free radicals at several sites on the orange G dye molecule [44]. Table 2 shows a comparative study between the fabricated MgO photocatalyst in our study and other photocatalysts in the literature such as ZnO, Mn-doped-ZnO, carbon nitride/ AgBr, and CaBiVMoO 8 [44][45][46][47]. The comparison confirmed that the fabricated MgO efficiently degrades the orange G dye.…”

“…After that, OH . directly oxidize orange G dye to intermediates and mineral salts then finally to CO 2 and H 2 O which considered non-toxic and ecofriendly products [31,[36][37][38][39][40][41][42][43][44][45][46][47]. The major intermediates were (3) ln H o ∕H t = K t Fig.…”

“…6 PL emission spectra of MgO products which were obtained using glutamine (a) and L-arginine (b) fuels 1 3 aromatic hydroxyl amines, substituted phenols, dicarboxylic aromatic acids as well as nitroso compounds. These intermediate products arise from the random attack of hydroxyl free radicals at several sites on the orange G dye molecule [44]. Table 2 shows a comparative study between the fabricated MgO photocatalyst in our study and other photocatalysts in the literature such as ZnO, Mn-doped-ZnO, carbon nitride/ AgBr, and CaBiVMoO 8 [44][45][46][47].…”

Photocatalytic dye degradation and biological activities of the Fe2O3/Cu2O nanocomposite

“…[5][6][7] Broad band gap issues can also be overcome by introducing a hetero or homo barrier made with a combination of different metal oxides, 8 nanowire, 9 core-shells 9 and nanowires, 10 which offers superior charge transfer competence and commotion compared to a sole metal oxide semiconductor. [11][12][13] This allows the competent and viable catalysts to perform under visible light irradiation, which constitutes nearly 46% of the astral band. 14 In recent years, the investigation of semiconductors for harvesting energy in the visible spectrum has led to the progression of the invention of non-titania-based semiconducting photocatalysts for dye degradation.…”

A new catalytic-spectrophotometry method for sensitive determination of Acid Red 18 in water samples using silver nanoparticles

“…At this time, several methods such as capillary electrophoresis [5], electrochemical methods [6,7], separation methods [8,9], photometric method [10,11] and spectrophotometric method [2,12,13] are reported for the determination of dyes. However some of these methods are not suitable for routine monitoring as they are time consuming, complicated, and have poor sensitivity and selectivity.…”