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Plasmon-enhanced photocatalytic hydrogen production over visible-light responsive Cu/TiO2

机译:可见光响应性Cu / TiO2上等离子体增强的光催化制氢

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Cheap and visible-light responsive Cu/TiO2 photocatalysts were fabricated by illuminating ultraviolet (UV) to a mixture of TiO2 nanoparticles (NPs) and Cu2O NPs in an evacuated reaction chamber. The Cu2O NPs were reduced by UV in an oxygen-free reaction chamber, and hence, metallic Cu NPs with size less than 5 nm were uniformly loaded on TiO2. Due to the plasmon resonance of the Cu NPs, the Cu/TiO2 exhibited a good performance of water-splitting hydrogen production under visible light in the presence of glycerol as a hole scavenger. The optimum hydrogen production rate of Cu/TiO2 was 0.24 mmol h(-1) g(-1). The Cu/TiO2 also showed high stability of the photocatalytic performance in the evacuated chamber; however, the visible-light responsive photocatalytic properties dramatically and rapidly decreased when exposed to air.
机译:通过在抽空的反应室内将紫外线(UV)照射到TiO2纳米颗粒(NPs)和Cu2O NPs的混合物中,制得了廉价且可见光敏感的Cu / TiO2光催化剂。 Cu2O NPs在无氧反应室中被紫外线还原,因此,尺寸小于5 nm的金属Cu NPs均匀地负载在TiO2上。由于Cu NP的等离子体共振,Cu / TiO 2在存在甘油作为空穴清除剂的情况下在可见光下表现出良好的水分解氢产生性能。 Cu / TiO2的最佳制氢速率为0.24 mmol h(-1)g(-1)。 Cu / TiO2在抽真空室内也表现出很高的光催化性能稳定性。然而,当暴露于空气中时,可见光响应的光催化性能急剧而迅速地降低。

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