Krüger Stefanie, Schwarze Michael, Baumann Otto, Günter Christina, Bruns Michael, Kübel Christian, Szabó Dorothée Vinga, Meinusch Rafael, Bermudez Verónica de Zea, Taubert Andreas
Institute of Chemistry, University of Potsdam, D-14476 Potsdam, Germany.
Institute of Chemistry, Technical University Berlin, D-10623 Berlin, Germany.
Beilstein J Nanotechnol. 2018 Jan 17;9:187-204. doi: 10.3762/bjnano.9.21. eCollection 2018.
The synthesis, structure, and photocatalytic water splitting performance of two new titania (TiO)/gold(Au)/ silk hybrid materials are reported. All materials are monoliths with diameters of up to ca. 4.5 cm. The materials are macroscopically homogeneous and porous with surface areas between 170 and 210 m/g. The diameter of the TiO nanoparticles (NPs) - mainly anatase with a minor fraction of brookite - and the Au NPs are on the order of 5 and 7-18 nm, respectively. Addition of poly(ethylene oxide) to the reaction mixture enables pore size tuning, thus providing access to different materials with different photocatalytic activities. Water splitting experiments using a sunlight simulator and a Xe lamp show that the new hybrid materials are effective water splitting catalysts and produce up to 30 mmol of hydrogen per 24 h. Overall the article demonstrates that the combination of a renewable and robust scaffold such as silk with a photoactive material provides a promising approach to new monolithic photocatalysts that can easily be recycled and show great potential for application in lightweight devices for green fuel production.
报道了两种新型二氧化钛（TiO）/金（Au）/丝杂化材料的合成、结构及光催化水分解性能。所有材料均为直径达约4.5厘米的整体材料。这些材料在宏观上是均匀且多孔的，表面积在170至210平方米/克之间。TiO纳米颗粒（NPs）——主要为锐钛矿型，含有少量板钛矿——和Au NPs的直径分别约为5纳米和7 - 18纳米。向反应混合物中添加聚环氧乙烷可实现孔径调节，从而获得具有不同光催化活性的不同材料。使用太阳光模拟器和氙灯进行的水分解实验表明，新型杂化材料是有效的水分解催化剂，每24小时可产生高达30毫摩尔的氢气。总体而言，本文表明，将可再生且坚固的支架（如丝）与光活性材料相结合，为新型整体光催化剂提供了一种有前景的方法，这种光催化剂易于回收，在用于绿色燃料生产的轻质设备中具有巨大的应用潜力。
