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Nanocarbon technology has been growing in recent times due to the excellent electrical, thermal and mechanical properties of nanocarbon. However, nanocarbon has not yet been commercially produced on a large scale because of the expensive production processes. As an alternative, plastic can be used as the carbon source not only because it is affordable but also because it is a waste stream which amount is abundant in the world, including in Indonesia. For the catalyst, Stainless Steel can also be an alternative also because it is cheaper compared to pure nickel and copper. Preparation of the catalyst also plays an important role in the nanocarbon synthesis process. One of the effective preparation methods is oxidative heat treatment at a temperature of 800 o C. The advantages of this method are the fairly short time required and the fact that no other material input is required. This preparation method is proved by the increasing amount of nanocarbons that are attached on catalyst up to 2.2% yield with one minute duration heat treatment. The result of XRD shows that carbon nanotubes (CNT) are present on the nanocarbon, synthesised at 800 o C and with pyrolysis temperature 450 o C, in every heat treatment duration variation. The most optimal heat treatment duration is 10 minutes where it shows the carbon is evenly spread and has the highest carbon concentration from SEM-EDX characterisation.

Synthesis of Nanocarbon from Polyethylene Plastic Using Stainless Steel Catalyst via Oxidative Heat Treatment Preparation Method