Sintesis dan Karakterisasi Grafena dengan Metode Reduksi Grafit Oksida Menggunakan Pereduksi Zn

Abstract

Graphene is a thin material, has a hexagonal two-dimentional lattice and is considered as an interesting material for adsorption process. Nowadays, graphene has been known as a potential material for diverse application, such as adsorbent. In this study graphene was synthesized from graphite. Furthermore, graphene was applied for adsorption of dichloro diphenyl trichloroethane (DDT). Graphene was synthesized by Hummer’s method using hydrothermal and reduced by Zn. The samples were characterized by Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) methods. The results of the XRD showed graphene structure in the 2θ, appeared at 23.9369 with interlayer spacing was about 3.71763 Å, compared with graphite oxide structure in the 2θ appeared at 11.2055 with interlayer spacing was about 7.89649 Å. The results of SEM analysis showed graphene has one layer with planar hexagonal structure and seems transparent whose single layer and multi layers. The graphene adsorption was analyzed by using the UV-Visible spectrophotometer. The results indicated the surface area of graphene was shown as 46.8563 m2/g. The amount of DDT adsorbed by graphene during 15 minutes was 7.5859 mg/g. This adsorption mechanism of DDT and graphene might be due to π-π and hydrogen interactions. Keywords: Adsorption, dichloro diphenyl trichloroethane (DDT), graphena. DOI: http://dx.doi.org/10.15408/jkv.v2i1.2233

The novel composite material MOF‐[Mg3(BTC)2]/GO/Fe3O4 and its use in slow‐release ibuprofen

“…Ethanol (96%), n-hexane (99%), Tween 80, and KMnO 4 (99%) were provided by Merck (Darmstadt, Germany). Ibuprofen was obtained from Na-ibuprofen hydrolysis (Supporting Information Figure S1) according to the method by Lestari et al, [13] and Fe 3 O 4 was prepared with the electrochemical method (Supporting Information Figure S2) according to Patimah et al [29] GO was synthesized via the Hummer method (Supporting Information Figure S3) according to Taufantri et al [30] PBS of pH 5.0 and 7.4 were prepared based on a method by Promega. [31] morphology, size, and element analysis were observed using scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) with an FEI Inspect S50 (Hillsboro, Oregon, U.S) and transmission electron microscopy (TEM) with a 120-kVJEM-1400 (Massachusetts, U.S).…”

Analysis of High Temperature Corrosion Attack on A36 Steel Galvanized Coating

“…Pada tahapan ini adalah proses pengujian dilakukan proses analisa pada benda kerja yang digunakan untuk bahan ujinya salah satunya Baja karbon rendah, Baja karbon rendah ini mempunyai keuletan yang tinggi dan ketangguhan akan tetapi mempunyai sifat kekerasan dan ketahanan aus yang rendah [11]. Pada umumnya baja jenis ini sering digunakan sebagai bahan baku untuk pembuatan jembatan, bodi mobil, pipa gedung, struktur bangunan, dan lainlainnya [12]. Ada perlakuan panas ini plat baja A36 yang telah di coating dan dipanaskan akan dapat diketahui bagaimana serangan korosinya [13].…”

Synthesis of Graphene Oxide Enriched Natural Kaolinite Clay and Its Application For Biodiesel Production

“…Graphene Oxide (GO) can be synthesized using several Hummer modification methods suggested by Taufantri (Taufantri et al, 2016), Rafitasari (Rafitasari et al, 2016), and Ali (Ali et al, 2018). GO synthesis is carried out by reacting graphite powder, KMnO4, and NaNO3 into a concentrated H2SO4 solution (98%) in an ice bath with a temperature not exceeding 20ºC to produce an optimal oxidation reaction and avoid the explosion due to the formation of carboxyl compounds that can occur.…”

“…Changes in d-spacing from 3.36 Å on graphite to 8.76 Å on GO are caused by the formation of carbonyl groups, ketone groups, epoxy groups, carboxyl groups, and phenol groups. The addition of water and oxygen molecules between layers also causes GO to have d-spacing wider (Taufantri et al, 2016;Waktu et al, 2013).…”