講演情報
[1205]銅スラグ由来銅酸化物/TiO₂光触媒の高効率水素生成に向けた性能最適化
○蔡 文安1、森岡 映美1、Suyantara Gde Pandhe Wisnu2、三木 一2、笹木 圭子1 (1. 早稲田大学 理工学術院、2. 九州大学大学院工学府 地球資源システム工学部門)
司会： 松山清（福岡工業大学）
キーワード：
銅製錬浮選スラグ、光触媒、ヘテロ接合、酸化チタン、水素生成
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.