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Graphene nanocomposites of CdS and ZnS in effective water purification |
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| Authors: | Ashish Kumar Sahoo Suneel Kumar Srivastava Prasanta Kumar Raul Ashok Kumar Gupta Rajnish Shrivastava |
| Institution: | 1. Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur, 721302, India 2. Defence Research Laboratory, Defence Research Development Organization (DRDO), Tezpur, 784001, Assam, India 3. Department of Civil Engineering, Indian Institute of Technology, Kharagpur, Kharagpur, 721302, India 4. Department of Civil Engineering, National Institute of Technology, Hamirpur, Hamirpur, 177005, India |
| Abstract: | The present work deals with syntheses of CdS/graphene and ZnS/graphene nanocomposites by hydrothermal reaction of graphene oxide and morpholine-4-carbodithioate complex of Cd and Zn, respectively. The corresponding nanocomposites has been investigated separately as photocatalyst in the decomposition of methylene blue in the presence of UV light and also as adsorbents in the removal of Cd(II) and Pb(II) ions in contaminated water. These studies have established that CdS/graphene and ZnS/graphene are effective photocatalyst as well as effective adsorbents in the removal of Cd(II) and Pb(II) ions to an extent of 97 and 99 % by ZnS/graphene and CdS/graphene nanocomposite, respectively, under 1 g L?1 of adsorption dose and at pH ~7. Further studies also established Langmuir model befitting for the adsorption of Pb(II) and Cd(II) ions on CdS/graphene and ZnS/graphene, respectively. The presence of interfering ions on extent of Cd(II) and Pb(II) removal has also been reported. |
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