College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
Nanoscale. 2017 Oct 26;9(41):16046-16058. doi: 10.1039/c7nr06809c.
This work presents a novel approach for preparing photocatalysts based on TiO nanotube arrays (TiO NTAs) anchored with carbon dots (CDs) by a facile two-step method which includes an electrochemical anodization technique followed by electrochemical deposition. The synthesized high quality graphitic carbon dots can act as sensitizers to extend the spectral range of light absorption towards the full solar spectrum. It is confirmed that TiO NTAs anchored with CDs (CDs/TiO NTAs) display greatly improved photocatalytic activity and excellent photocatalytic stability. By tuning the light absorption of the TiO NTAs, the utilization of light in charge generation and separation is well synergized with the CDs for enhanced photocatalytic pollutant degradation and water splitting, achieving significantly improved rates of photocatalytic degradation and H production in the visible and full spectra, respectively.
这项工作提出了一种基于 TiO 纳米管阵列（TiO NTAs）的新型光催化剂制备方法，该方法通过简便的两步法实现，包括电化学阳极氧化技术和随后的电化学沉积。合成的高质量石墨碳点可以作为敏化剂将光吸收光谱扩展到全太阳光谱。研究证实，负载碳点的 TiO NTAs（CDs/TiO NTAs）显示出大大提高的光催化活性和优异的光催化稳定性。通过调节 TiO NTAs 的光吸收，载流子产生和分离过程中的光利用与碳点协同作用，从而增强光催化污染物降解和水分解，在可见光和全光谱范围内分别实现了显著提高的光催化降解和 H2 产生速率。
