Research Paper
Year: 2020 | Month: September | Volume: 7 | Issue: 9 | Pages: 42-51
Preparation And Characterization Composites of Activated Carbon From Cassava Peel (Manihot Utillisima) – Copper (II) Oxide (CuO) As a Thermoelectric Material
Ikbal Arazi1, Ananda Putra2
1Faculty of Mathematics & Natural Science, Universitas Negeri Padang,
2Jl. Prof Hamka, Air Tawar, Padang, West Sumatera, Indonesia.
Corresponding Author: Ananda Putra
ABSTRACT
Electrical energy is one of the energies that is needed by humans. One of the efforts to save electrical energy is by using the thermoelectric method. Thermoelectric material is a material that can convert heat energy into electrical energy through the Seebeck effect . In this study, the thermoelectric material was made from activated carbon composites of cassava peel-CuO. Activated Carbon-CuO composite material is made by mixing various mass composition ratios (grams). Composite material is tested for electrical conductivity, thermal conductivity and the resulting electrical voltage ( Seebeck effect ). To see the crystal shape and size of the composite material, characterization was carried out using X-Ray Diffraction (XRD) and to determine the band gap of the composite material, characterization was carried out using UV- Diffuse Reflectance (UV-DRS). The results of the test show that the composite material with a ratio of grams of activated carbon: grams of CuO is the best material as a thermoelectric material because it has a high electrical conductivity value of 0.4167 MΩ-cm - with a low heat conductivity of 20.3057 J / s and with the mains voltage ( Seebeck effect ) of 0.019036 mV / K. The results of characterization using XRD showed that the addition of activated carbon to CuO did not damage the crystal form of CuO and the crystal size (D) 23,4240 and crystal size (d) 0,2521 of the composite material, namely nm and nm. The results of characterization using UV-DRS show that the band gap of the composite material is 1,63 eV. Based on the test results and characteristics, it is concluded that the CuO composite material can be used as a thermoelectric material.
Keywords: Activated Carbon, Copper (II) Oxide, Composites, Thermoelectric Materials.
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