Comparison of Durability TiO2/Graphene to Batik Waste Processing For Photodegradation Applications
Hariyanto Hidayat1,b), Nandang Mufti 1,2,a), Atika Sari Puspita dewi1, Poppy Puspitasari3, Sunaryono1,2

University of Malang (UM)
Jl. Semarang No.5, Sumbersari, Kec. Lowokwaru, Kota Malang, Jawa Timur 65145

Abstract

The increase in textile production causes an increase in the amount of liquid waste. This increase can cause pollution to the environment if not treated properly. Therefore, it is necessary to treat textile waste that is effective and efficient to overcome this. This study aimed to investigate the effect of adding graphene to the durability of TiO2 superimposed on a cork ball. The floating cork balls cause the TiO2/Graphene composite layer can work optimally after exposure to sunlight. The sol-gel method has been successfully carried out by coating the cork ball on TiO2/Graphene. The deep coating method was used to deposit TiO2 and Graphene on cork balls. Characterization in this study using XRD, FTIR, SEM, and UV-Vis. The diffraction peak with XRD shows TiO2, which has a crystal size of 6.7 nm, while graphene is amorphous and does not have a crystal structure. SEM test results show that TiO2 has a porosity of 80.3%. TiO2, with the addition of graphene concentration, decreased with a wavelength range of 121-84 nm. The smallest absorbance and band gap values occur in TiO2-10% graphene with an absorbance value of 213 nm and a band gap value of 2.9 eV. For comparison, the TiO2/Graphene band gap (0.01) for 2 days of durability has a band gap of 4.2 eV, while the TiO2/Graphene (0.01) band gap (0.01) has a band gap of 4.1 eV for 3 days with a wavelength close to visible light. Therefore, the longer the irradiation, the fewer UV rays absorbed. So this research is successful in degrading batik waste properly.

Keywords: Batik Waste, Catalysts, Graphene, Photocatalyst, TiO2

Topic: Catalyst and photocatalyst