Photocatalytic Activity of Co:TiO2 Nanocomposites and their Application in Photodegradation of Acetic Acid

Abstract

Nanocomposites of Co:TiO 2 were prepared by wet chemical methods. The prepared samples were characterized by XRD, SEM, BET, FTIR and UV-Visible spectra. The XRD analysis confirmed the presence of rutile and anatase both phases were present. It is found that rutile phase was more dominant. Applying the Scherrer's calculations through which particle size was found 35 and 80 nm in case of Co:TiO 2 and pure TiO 2 respectively. SEM image of Co:TiO 2 and TiO 2 were observed and both found in nanodiamension. The photocatalytic degradation of acetic acid was done at different condition of concentration, amount of photocatalyst and type of catalyst. The effective photodegradation of acetic acid were found at low concentration and photodegradation increases with decrease the concentration of acetic acid. The prominent degradation of acetic acid was found in the presence of nanocomposites Co:TiO 2 as compared with TiO 2 .

Photocatalytic Degradation of Citric Acid in Wastewater in Presence of Visible Light by La:Ni:TiO<sub>2</sub> Nanocomposite

“…In this study, photocatalytic degradation of Citric Acid was investigated. The measured values of residual concentration of Acid in the reaction mixture at different times of illumination (or reaction time) have been shown in Figures 6 (I, II, III and IV) [45][46][47][48][49][50][51][52][53].…”

“…Thereby the formation of the reactive hydroxyl and superoxide radicals is also simultaneously reduced. Thus there should be an optimum value maintained for the catalyst and the Citric Acid concentration, wherein maximum efficiency of degradation can be achieved [46,48,52].…”

“…This implies that acidic conditions are favourable towards the formation of the reactive intermediates that is hydroxyl radicals is significantly enhanced, which further help in enhancing the reaction rate. On the other hand, in highly acidic highly basic medium conditions is relatively less favourable for the formation of reactive intermediates and hence less spontaneous [47][48]51].…”