贵金属纳米颗粒/金属-有机骨架异质材料的制备及其光催化制氢性能
首发时间:2016-05-11
摘要:考虑到金属-有机骨架材料(MOFs)的特点,将金属-有机骨架和贵金属纳米颗粒进行精确合理的结合,对发展高效光催化剂具有重要的研究意义。采用选择性光沉积方法在MIL-88B MOF光催化剂表面装载贵金属纳米颗粒(如Pt、Ag、Au)。结果显示贵金属纳米颗粒在MIL-88B纳米晶表面的装载对光催化产氢效率的提高十分重要。在可见光辐照下,金属@MIL-88B材料在三乙醇胺作为空穴牺牲剂条件下展现出水分解产氢活性。实验结果清晰地证明了贵金属光沉积是设计合成具有产氢性能的金属@MIL-88B材料的有效策略。
关键词: 无机化学 金属-有机骨架 贵金属纳米颗粒 异质结构 光催化 产氢
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Synthesis of Noble Metals Nanoparticles/Metal-organic Frameworks Heterostructures for Photocatalytic Hydrogen Production
Abstract:Given the merits of the metal-organic frameworks (MOFs), the precise and rational combination of MOFs and noble metals nanoparticles is of importance to the development of efficient photocatalysts. A facile method has been developed for loading noble metals (e.g., Pt, Ag and Au) on MIL-88B photocatalysts by selective photoreduction of metal ions. The results show that loading noble metal nanoparticles on the surface of MIL-88B nanocrystals can substantially improve the efficiency in photocatalytic water splitting. The metal@MIL-88B shows distinct photocatalytic activity in H2 production using triethanolamine (TEOA) as a sacrificial agent. This work clearly demonstrates that photoreduction of metal ions is a valid strategy for designing and constructing metal@MOFs for photocatalytic H2 production.
Keywords: inorganic chemistry metal-organic frameworks noble metals nanoparticles heterostructures photocatalytic H2 production
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贵金属纳米颗粒/金属-有机骨架异质材料的制备及其光催化制氢性能
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