Sintesis Hijau Nanopartikel TiO2 dari Titanium Tetraisopropoksida Doping Barium menggunakan Ekstrak Daun Kelapa Sawit sebagai Fotokatalis

Abstract

A study was conducted on the green synthesis of TiO2. This research aimed to green synthesis TiO2 using titanium tetraisopropoxide with palm leaf extract and barium doping to reduce the band gap energy in the degradation of methyl orange. FTIR characterization showed O-H stretching vibration at 3440 cm-1, carbonyl functional group C=O stretching vibration at 1635 cm-1, and Ti–O vibration at 588 cm 1 . In Ba-doped TiO2, an absorption peak shift occurred in the range of 548–595 cm-1, indicating an overlap of Ti–O and Ba–O bond vibrations, which suggests the formation of a barium titanate phase. XRD characterization showed peaks at 2θ = 25.41, 35.41, 46.49, 57.71, 60.18, 84.38, 85.30, and 89.73, corresponding to the planes 101, 104, 200, 121, 204 according to JCPDS card No. 78-2486, confirming that TiO2 has anatase characteristics. SEM characterization of Ba-doped TiO2 showed morphology that tends to agglomerate and is non-uniform. PSA characterization yielded particle sizes of 31 nm, 49 nm, 59 nm, and 118 nm. UV-Vis DRS characterization showed band gap energies of 3.19 eV, 3.16 eV, 3.14 eV, and 3.11 eV, respectively. The percentage degradation of methyl orange after 180 minutes using TiO2 doped with 0%, 1%, 2%, and 3% Bawas 65.44%, 70.80%, 78.82%, and 89.66%, respectively.