School of Physics and Materials Science, Anhui University, Hefei 230039, People's Republic of China ; School of Science, Anhui University of Science and Technology, Huainan 232001, People's Republic of China.
School of Physics and Materials Science, Anhui University, Hefei 230039, People's Republic of China.
Nanoscale Res Lett. 2014 May 29;9(1):270. doi: 10.1186/1556-276X-9-270. eCollection 2014.
In this paper, TiO2 nanowires (NWs) on Ti foils were prepared using a simple hydrothermal approach and annealing treatment. CdS quantum dots (QDs) were assembled onto the crystallized TiO2 NWs by sequential chemical bath deposition. Ultraviolet-visible absorption spectra showed that CdS adds bands in the visible to the TiO2 absorption and exhibited a broad absorption band in the visible region, which extended the scope of absorption spectrum and helped improve the photocatalytic degradation efficiency. The results of photocatalytic experiment revealed that CdS-TiO2 NWs possessed higher photocatalytic activities toward methyl orange than pure TiO2 nanowires. The degradation efficiency of 96.32% after ten cycles indicated that the as-prepared CdS-TiO2 composite exhibited excellent long-time recyclable ability and can be reused for the degradation of contaminants.
本文采用简单的水热法和退火处理，在钛箔上制备了 TiO2 纳米线（NWs）。CdS 量子点（QDs）通过顺序化学浴沉积组装到结晶的 TiO2 NWs 上。紫外-可见吸收光谱表明，CdS 在可见光区为 TiO2 的吸收增加了带，并在可见光区显示出宽吸收带，扩展了吸收光谱的范围，有助于提高光催化降解效率。光催化实验结果表明，CdS-TiO2 NWs 对甲基橙的光催化活性高于纯 TiO2 纳米线。经过十次循环后降解效率达到 96.32%，表明所制备的 CdS-TiO2 复合材料具有优异的长时间可回收能力，可用于降解污染物。
