Abstract
In the recent past, nanocomposite materials have been successfully utilised in the remediation of inorganic and organic pollutants from contaminated water. The present work deals with synthesis, characterisations and adsorptive performances of graphene oxide/TiO2 (GO/TiO2) nanocomposite-based adsorbent. GO/TiO2 nanocomposite was utilised in the adsorption of Rhodamine B (RB), Cd(II) and Zn(II) ions from waste water. The synthesised nanocomposite was also used in the photo-catalytic degradation of RB from dye-containing solutions. The adsorption study has been carried out utilising different adsorption parameters in our laboratory. P-XRD, FT-IR, FE-SEM and EDX methods were used in the characterisation of GO/TiO2. Adsorption efficiency of RB, Cd(II) and Zn(II) ions was found to be 68.99%, 49.74% and 56.91% at 60 min, 58.91%, 36.85% and 59.49% at 60 °C and 81.38%, 90.99% and 99.09% at pH 6. Maximum adsorption capacities of GO/TiO2-based adsorbent have been evaluated using the Langmuir isotherm model for RB, Cd(II) and Zn(II) ions as 11.299, 14.326 and 11.326 mg/g, respectively. The maximum photo-degradation of RB was found to be 94.59% in the presence of GO/TiO2 nanocomposite under UV–visible radiations. Overall, adsorption experiments showed that the performances of GO/TiO2 nanocomposite for all adsorbates have been found in the order RB > Zn(II) > Cd(II).
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