Veziroglu Salih, Obermann Anna-Lena, Ullrich Marie, Hussain Majid, Kamp Marius, Kienle Lorenz, Leißner Till, Rubahn Horst-Günter, Polonskyi Oleksandr, Strunskus Thomas, Fiutowski Jacek, Es-Souni Mohammed, Adam Jost, Faupel Franz, Aktas Oral Cenk
Chair for Multicomponent Materials, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-Kiel University, Kaiserstr. 2, 24143 Kiel, Germany.
Synthesis and Real Structure Group, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-Kiel University, Kaiserstr. 2, 24143 Kiel, Germany.
ACS Appl Mater Interfaces. 2020 Apr 1;12(13):14983-14992. doi: 10.1021/acsami.9b18817. Epub 2020 Mar 18.
Au nanoparticle (NP) decorated heterogeneous TiO catalysts are known to be effective in the degradation of various organic pollutants. The photocatalytic performance of such Au-TiO structures remarkably depends on the size, morphology, and surface coverage of the Au NPs decorating TiO. Here we propose an effective way of preparing a highly active Au nanocluster (NC) decorated TiO thin film by a novel photodeposition method. By altering the solvent type as well as the illumination time, we achieved well-controlled surface coverage of TiO by Au NCs, which directly influences the photocatalytic performance. Here the Au NCs coverage affects both the electron store capacity and the optical absorption of the hybrid Au-TiO system. At low surface coverage, 19.2-29.5%, the Au NCs seem to enhance significantly the optical adsorption of TiO at UV wavelengths which therefore leads to a higher photocatalytic performance.
已知金纳米颗粒（NP）修饰的非均相TiO催化剂在降解各种有机污染物方面很有效。这种金-二氧化钛结构的光催化性能显著取决于修饰二氧化钛的金纳米颗粒的尺寸、形态和表面覆盖率。在这里，我们提出了一种通过新型光沉积方法制备高活性金纳米团簇（NC）修饰的TiO薄膜的有效方法。通过改变溶剂类型以及光照时间，我们实现了金纳米团簇对二氧化钛表面覆盖率的良好控制，这直接影响了光催化性能。在这里，金纳米团簇的覆盖率影响了混合金-二氧化钛体系的电子存储容量和光吸收。在低表面覆盖率（19.2 - 29.5%）下，金纳米团簇似乎显著增强了二氧化钛在紫外波长下的光吸附，因此导致了更高的光催化性能。
