Synthesis of Graphene Oxide/Titanium Dioxide Nanocomposites with Varying Graphene Oxide Contents: Morphological and Optical Band Gap Analysis

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The GO/TiO₂ composites containing 3–11 wt% GO were successfully synthesised via a simple mixing method to investigate their optical properties. SEM analysis revealed spherical TiO₂ nanoparticles with an average size of ~28 nm and a uniform dispersion of GO within the composite structure. UV–Vis diffuse reflectance spectroscopy results indicated that GO incorporation shifted the absorption edge toward the visible-light region. The optical band gap decreased from 3.37 eV for pristine TiO₂ to 2.79 eV for the GO/TiO₂ composite containing 11 wt% GO. These findings demonstrate that GO effectively modifies the electronic structure of TiO₂, enhances visible-light absorption, and improves its potential for solar energy applications.

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Materials Science Forum (Volume 1197)

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121-127

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July 2026

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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