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All Journal MASALIQ: Jurnal Pendidikan dan Sains
Julianti, Sri Rara
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Religion Education Social Sciences

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Pengaruh Penambahan Aditif Diethanolamine (DEA) terhadap Energi Celah Pita TiO₂ Terdoping ZnO menggunakan Metode Sol-Gel Julianti, Sri Rara; Sanjaya, Hary
MASALIQ Vol 5 No 5 (2025): SEPTEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i5.6878

Abstract

This study aims to evaluate the effect of Diethanolamine (DEA) addition on the band gap energy and crystal structure of TiO₂ semiconductors doped with ZnO using the sol-gel method. DEA functions as a stabilizing agent and particle growth controller to achieve more uniform particle size and distribution. DEA concentrations of 1%, 2%, 3%, 4%, and 5% were applied. The synthesis process involved mixing TiO₂ and ZnO in ethanol, adding DEA, sonication, drying, and calcination. Characterization was conducted using UV-Vis Diffuse Reflectance Spectroscopy (UV-DRS), employing the Kubelka-Munk approach to determine the band gap values. The results indicate that DEA addition significantly reduced the band gap energy to 3.05 eV at the optimal concentration of 4%, attributed to the formation of structural defects and reduced particle size, which expanded the active surface area and shortened the electron excitation distance. However, at 5% DEA concentration, the band gap increased to 3.14 eV due to particle agglomeration. These findings confirm the crucial role of DEA in controlling the optical properties of TiO₂-ZnO, with a 4% concentration offering optimal performance for photocatalytic and solar cell applications. This study demonstrates that chemical additive manipulation during synthesis is an effective strategy for engineering the electronic properties of semiconductors.
Co-Authors Hary Sanjaya