MAGNETIC REDUCED GRAPHENE OXIDE AS ADVANCED MATERIALS FOR ADSORPTION OF METAL IONS
DOI:
https://doi.org/10.17146/jsmi.2017.18.4.4119Keywords:
Graphene Oxide (GO), Magnetic Nanoparticles, Nanopartikel Magnetik, Adsorption, AdsorpsiAbstract
MAGNETIC REDUCED GRAPHENE OXIDEAS ADVANCED MATERIALS FORADSORPTION OF METAL IONS. Magnetic Reduced Graphene Oxide (MRGO) is graphene-based material that modified by introducing iron oxide nanoparticles onto the surface of graphene oxide (GO). MRGO exhibit some unique and advanced properties and characteristic including high surface area, superparamagnetic characteristics and adsorption ability against ions and molecules. In this research, MRGO was prepared by the Hummers method, followed by reacting ferrochloride tetrahydrate and ferrichloride hexahydrate through co-precipitation method for the formation of iron oxide nanoparticles on the GO surface. MRGO was prepared with various composition of ferrochloride tetrahydrate. Furthermore, the resultant of MRGO was characterized by Scanning Electron Microscope (SEM), Fourier-transform Infrared (FT-IR) Spectroscopy, and Atomic Adsorption Spectroscopy (AAS). Adsorption characteristics test was conducted against electroplating waste-based metal ion. The SEM results showed that GO exhibited the layered structure meanwhile MRGO exhibit as Feƒ O4 -modified GO layered surfaces. MRGO made by different ferrochloride tetrahydrate differed in the iron oxide nanoparticles formation on the surface of GO. Increasing the composition of ferrochloride tetrahydrate increased the formation of iron oxide nanoparticles. Moreover, MRGO (FeCl‚ .4H‚ O 0.0064 M) is successfully applied as nickel metal ion adsorbents with the adsorption ability of 78,24%. This result showed that MRGO have a potential prospect as an effective and efficient advanced adsorbent material candidate
ABSTRAK
MAGNETIC REDUCED GRAPHENE OXIDE SEBAGAI MATERIAL MUTAKHIR UNTUK PENYERAPAN ION LOGAM. Magnetic Reduced Graphene Oxide (MRGO) merupakan material berbasis graphene yang dimodifikasi dengan adanya nanopartikel besi oksida pada permukaan Graphene Oxide (GO). MRGO menampilkan sifat dan karakter yang unik dan mutakhir seperti luas permukaan yang tinggi, karakter superparamagnetik serta kemampuan penyerapan terhadap ion dan molekul. Pada penelitian ini, MRGO dipreparasi dengan menggunakan metode Hummer yang diikuti dengan mereaksikan ferrochloride tetrahydrate dan ferrichloride hexahydrate melalui metode kopresipitasi untuk membentuk nanopartikel besi oksida pada permukaan GO. MRGO dipreparasi dengan memvariasikan konsentrasi prekursor ferrochloride tetrahydrate. Selanjutnya, MRGO yang dihasilkan dikarakterisasi dengan menggunakan Scanning Electron Microscope (SEM), Fourier-Transform Infrared (FT-IR) Spectroscopy, dan Atomic Adsorption Spectroscopy (AAS). Karakter adsorpsi diuji dengan menggunakan ion logam nikel. Hasil observasi SEM menunjukkan bahwa GO menampilkan struktur lapisan sedangkan pada MRGO menampilkan adanya nanopartikel besi oksida pada lapisan permukaan GO. MRGO menampilkan sebaran nanopartikel besi oksida yang berbeda pada konsentrasi yang berbeda. Peningkatan konsentrasi awal prekursor ferrochloride tetrahydrate akan meningkatkan pembentukan nanopartikel besi oksida pada GO. MRGO (FeCl2.4H2 O 0,0064 M) dapat diaplikasikan pada ion nikel sebagai adsorben dengan kemampuan absorspi sebesar 78,24%. Hasil ini menunjukan bahwa MRGO memiliki prospek yang potensial sebagai kandidat material untuk adsorben ion logam yang efektif dan efisien.
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