Synthesis of Nanocellulose from Salak Pondoh (Salacca edulis) Frond Using Ultrasound Method as TiO2/Nanocellulose Photocatalyst Supporting Materials

Rahmawati Dyan Kusuma, Didik Krisdiyanto

Uin Sunan Kalijaga Yogyakarta Indonesia

Nanocellulose from Salak Pondoh (Salacca edulis) Frond was synthesized using the ultrasound method and then used as a supporting material for TiO2/nanocellulose photocatalyst. This study aims to examine the characteristics of nanocellulose from salak fronds synthesized using the ultrasonic method and to determine the characteristics of TiO2/nanoselulose photocatalyst with nanocellulose as a carrier. Nanocellulose from Salak Pondoh (Salacca edulis) Frond was synthesized using acid hydrolysis and ultrasonication methods, and the results were characterized using Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD). Titanium dioxide was impregnated onto nanocellulose in a one-step method using tetrabutyl titanate precursor, and the results were characterized using FTIR, XRD, and UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS). The characterization results of nanocellulose with FTIR showed typical absorption peaks of cellulose at 894 cm-1, which is the stretching vibration of the glycosidic bond, and the XRD results showed absorption peaks that match with JCPDS 50-2241 data, indicating a nanocrystalline cellulose structure with an average crystal size of 4.2 nm and crystallinity of 34%. The characterization of TiO2/nanocellulose photocatalyst was conducted with FTIR, showing typical Ti-O absorption peaks, and XRD showed typical cellulose and TiO2 anatase peaks in accordance with JCPDS 21-1272, with an average composite size of 3.7 nm and crystallinity of 43.4%. Characterization of the nanocomposite with UV-Vis DRS showed a band gap energy of 3.8 eV, fulfilling the requirements as a photocatalyst.

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