Presentation Information
[1205]Performance optimization of TiO2/copper oxide photocatalysts derived from copper slag for hydrogen production
○Wenan Cai1, Amy Morioka1, Gde Pandhe Wisnu Suyantara2, Miki Hajime2, Keiko Sasaki1 (1. Waseda university,Faculty of Science and Engineering, 2. Kyushu University, Department of Earth Resources Engineering,)
Chairperson: 松山清（福岡工業大学）
Keywords:
Copper smelting flotation slag,Photocatalysis,Heterojunction,TiO2,Hydrogen evolution
Copper smelting tailings from Uzbekistan were converted into functional photocatalytic materials by compositing with TiO2. The photocatalytic H₂ evolution performance was systematically evaluated to explore the value-added utilization of metallurgical residues. The calcination conditions, composite ratio, and reaction parameters were optimized to elucidate the effects of tailings-derived phases on interfacial charge transfer in TiO₂-based systems. The optimal photocatalytic activity was achieved at 5 wt% tailings, pH 10.5, and 25°C using triethanolamine as the sacrificial agent, affording an H₂ evolution rate of 22 000 μmol g⁻¹ h⁻¹, which was 1.5 times higher than that of the unoptimized system.