UV-induced photocatalytic degradation of azo dyes by organic-capped ZnO nanocrystals immobilized onto substrates

Photocatalytic degradation of methyl red dye

“…The intermediate 2 might also be decomposed to form a new low molecular weight byproduct, which has a blue-shifted absorption compared to the MR monomer (λ max.~4 15 nm). 42,43 This peak, which might correspond to a low molecular weight byproduct formation, was found to increase as the rate of the photocatalytic reaction decreased (decreasing the catalytic power of silica as shown in the profile of pure silica). Product 3 can be further attacked by · OH to form bi-hydroxyl products 4 and 5 or a dehydrogenated radical which undergoes ring opening.…”

ZnO Nanorods as an Efficient Catalyst for the Green Synthesis of Indole Derivatives Using Isatoic Anhydride

“…19,20 Nanocrystalline zinc oxide is a non-hygroscopic, cheap, and non-toxic material which has been used as a catalyst of various organic reactions. [21][22][23][24][25][26] Continuing our efforts directed towards the simple preparation of biologically active target molecules through one-pot reactions, [27][28][29] we present here the synthesis of some novel indoles via a onepot reaction of isatoic anhydride, alcohols, and alkyl bromide in the presence of zinc oxide nanorods (NR-ZnO) at 80°C in a solvent-free reaction medium (Scheme 1).…”

Photocatalytic activity of biogenic silver nanoparticles synthesized using yeast (Saccharomyces cerevisiae) extract

“…In textile and paper industry, recently silver nanoparticles are used to degrade the organic dyes as they exhibit enhanced photocatalytic property for degrading organic dyes under solar radiation (Kumar et al 2013). Recent reports suggest that the removal of organic dyes using Ag nanoparticles is a better choice than the common dye removal techniques like redox treatment (Kim and Hensley 1997), electro-coagulation (Szpyrkowicz 2005), carbon sorption (Gomez et al 2007) and UV photodegradation (Comparelli et al 2005;Sohrabi and Ghavami 2008).…”