Fabrication of TiO2/Carbon Photocatalyst using Submerged DC Arc Discharged in Ethanol/Acetic Acid Medium

4th International Conference on Advanced Materials Science and Technology

Saraswati, T.E.^1 ; Nandika, A.O.^1 ; Andhika, I.F.^1 ; Patiha^1 ; Purnawan, C.^1 ; Wahyuningsih, S.^1 ; Rahardjo, S.B.^1

Department of Chemistry, Mathematic and Natural Sciences Faculty, Sebelas Maret University, Jl. Ir. Sutami 36A, Kentingan, Surakarta

57126, Indonesia^1

关键词: Arc-discharge method;    Direct current;    Dye concentration;    Oxygen-containing functional groups;    Photocatalytic activities;    Photodegradation of methylene blue;    Stretching vibrations;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/202/1/012058/pdf
DOI  :  10.1088/1757-899X/202/1/012058

来源: IOP

【 摘 要 】

This study aimed to fabricate a modified photocatalyst of TiO2/C to enhance its performance. The fabrication was achieved using the submerged direct current (DC) arc-discharge method employing two graphite electrodes, one of which was filled with a mixture of carbon powder, TiO2,and binder, in ethanol with acetic acid added in various concentrations. The arc-discharge method was conducted by flowing a current of 10-20 A (∼20 V). X-ray diffraction (XRD) patterns showed significant placements of the main peak characteristics of TiO2, C graphite, and titanium carbide. The surface analysis using Fourier transform infrared spectroscopy (FTIR) revealed that fabricated TiO2/C nanoparticles had stretching vibrations of TiO, CH, CO, C-O, O-H and CC in the regions of 450-550 cm-1, 2900-2880 cm-1, 1690-1760 cm-1, 1050-1300 cm-1, 3400-3700 cm-1and ∼1600 cm-1, respectively. In addition, the study investigated the photocatalysts of unmodified and modified TiO2/C for photodegradation of methylene blue (MB) dye solution under mercury lamp irradiation. The effectiveness of the degradation was defined by the decrease in 60-minute absorbance under a UV-Vis spectrophotometer. Modified TiO2/C proved to be significantly more efficient in reducing dye concentrations, reaching ∼70%. It indicated that the oxygen-containing functional groups have been successfully attached to the surface of the nanoparticles and played a role in enhancing photocatalytic activity.