Synthesis and Characterization of Nanocomposites TiO2-ZnO With Co-Precipitation Method For The Purification of Sei Gohong Peat Water Palangka Raya

Annisa Aulia Hatma; Luqman Hakim; Thathit Suprayogi; Jhon Wesly Manik

doi:10.71094/vkj.v4i1.343

Authors

Annisa Aulia Hatma Physics Study Program, FMIPA University of Palangka Raya, Palangkaraya, Indonesia
Luqman Hakim Physics Study Program, FMIPA University of Palangka Raya, Palangkaraya,
Thathit Suprayogi Physics Study Program, FMIPA University of Palangka Raya, Palangkaraya, Indonesia
Jhon Wesly Manik Physics Study Program, FMIPA University of Palangka Raya, Palangkaraya, Indonesia

DOI:

https://doi.org/10.71094/vkj.v4i1.343

Keywords:

Peat Water, Tio₂–Zno Nanocomposites, Photocatalysis, Co-Precipitation, Water Purification

Abstract

Peat water is a potential raw water source in Central Kalimantan; however, its utilization is limited due to its high acidity (pH 3–5) and high organic matter content, which causes a brownish-red color. This study aimed to synthesize and characterize TiO₂–ZnO nanocomposites using the co-precipitation method and evaluate their effectiveness as photocatalysts for the purification of peat water from Sei Gohong Village, Palangka Raya. The nanocomposites were synthesized through the co-precipitation method using low-temperature processing (<100°C). Material characterization was carried out using X-ray Diffraction (XRD), Scanning Electron Microscopy–Energy Dispersive X-ray (SEM–EDX), and UV–Visible spectroscopy. XRD analysis confirmed the formation of TiO₂ and ZnO crystalline phases, with the main diffraction peak positions at 2θ of 54.67° (A1), 49.02° (A2), 55.70° (A3), 54.06° (A4), and 54.97° (A5). SEM–EDX characterization of sample A2 showed an average particle size of 180.51 ± 2.03 nm. Photocatalytic performance testing demonstrated that the A2 nanocomposite (75% TiO₂:25% ZnO) exhibited the highest peat water purification efficiency, achieving an absorbance reduction of 67.35% after 5 hours of UV irradiation and increasing the peat water pH from 4 to 7. These findings indicate that the synthesized TiO₂–ZnO nanocomposite has good potential as an effective photocatalyst for peat water purification.

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