Fabrication of Gold/Titania Photocatalyst for CO2 Reduction Based on Pyrolytic Conversion of the Metal–Organic Framework NH2-MIL-125(Ti) Loaded with Gold Nanoparticles
Fabrication of Gold/Titania Photocatalyst for CO2 Reduction Based on Pyrolytic Conversion of the Metal–Organic Framework NH2-MIL-125(Ti) Loaded with Gold Nanoparticles
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DOI：
10.1021/acs.chemmater.5b03017
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发表时间：
2015-10
影响因子：
8.6
通讯作者：
Kira Khaletskaya;Anna Pougin;R. Medishetty;Christoph Rösler;C. Wiktor;J. Strunk;R. Fischer
中科院分区：
文献类型：
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作者：
Kira Khaletskaya;Anna Pougin;R. Medishetty;Christoph Rösler;C. Wiktor;J. Strunk;R. Fischer
二氧化钛具有独特的物理化学性质，在纳米材料领域具有潜在的应用前景。在相、形状、形态方面控制TiO 2，特别是TiO 2颗粒的纳米级合成仍然是一个挑战。含Ti金属有机骨架（MOFs），如MIL-125，可以用作牺牲前体以获得具有不同相组成、形态、尺寸和表面积的TiO 2材料。MIL-125是由Ti/O团簇作为二级结构单元（SBU），以1，4-苯二甲酸（bdc）为桥连单元构成的。在这项研究中，预先形成的和表面稳定的金纳米粒子（GNP）沉积到表面上的氨基官能化的NH 2-MIL-125在溶剂热合成。通过热解GNP/NH 2-MIL-125纳米晶制备了靶向金/二氧化钛纳米复合材料GNP/TiO 2。用GNP对TiO 2进行改性，显著提高了MOF衍生的TiO 2材料的光催化活性。
Titania exhibits unique photophysical and -chemical properties and can be used for potential applications in the field of photocatalysis. The control of TiO2 in terms of phase, shape, morphology, and especially nanoscale synthesis of TiO2 particles still remains a challenge. Ti-containing metal–organic frameworks (MOFs), such as MIL-125, can be used as sacrificial precursors to obtain TiO2 materials with diverse phase compositions, morphologies, sizes, and surface areas. MIL-125 is composed of Ti/O clusters as the secondary building units (SBUs) bridged by 1,4-benzenedicarboxylate (bdc). In this study, preformed and surfactant-stabilized gold nanoparticles (GNPs) were deposited onto the surface of amino functionalized NH2-MIL-125 during solvothermal synthesis. Targeted gold/titania nanocomposites, GNP/TiO2, were fabricated through the pyrolysis of GNP/NH2-MIL-125 nanocrystals. The modification of TiO2 with GNPs significantly increased the photocatalytic activity of the MOF derived TiO2 material for the re...