Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
Nanoscale. 2011 Jul;3(7):2943-9. doi: 10.1039/c1nr10269a. Epub 2011 May 31.
TiO(2)@carbon core/shell nanofibers (TiO(2)@C NFs) with different thinkness of carbon layers (from 2 to 8 nm) were fabricated by combining the electrospinning technique and hydrothermal method. The results showed that a uniform graphite carbon layer was formed around the electrospun TiO(2) nanofiber via C-O-Ti bonds. By adjusting the hydrothermal fabrication parameters, the thickness of carbon layer could be easily controlled. Furthermore, the TiO(2)@C NFs had remarkable light absorption in the visible region. The photocatalytic studies revealed that the TiO(2)@C NFs exhibited enhanced photocatalytic efficiency of photodegradation of Rhodamine B (RB) compared with the pure TiO(2) nanofibers under visible light irradiation, which might be attributed to high separation efficiency of photogenerated electrons and holes based on the synergistic effect between carbon as a sensitizer and TiO(2) with one dimension structure. Notably, the TiO(2)@C NFs could be easily recycled due to their one-dimensional nanostructural property.
TiO(2)@碳核/壳纳米纤维（TiO(2)@C NFs）具有不同厚度的碳层（2 至 8nm），通过静电纺丝技术和水热法制备而成。结果表明，通过 C-O-Ti 键在电纺 TiO(2)纳米纤维周围形成了均匀的石墨碳层。通过调整水热制备参数，很容易控制碳层的厚度。此外，TiO(2)@C NFs 在可见光区具有显著的光吸收。光催化研究表明，与纯 TiO(2)纳米纤维相比，TiO(2)@C NFs 在可见光照射下具有增强的光催化罗丹明 B（RB）降解效率，这可能归因于基于碳作为敏化剂和一维结构的 TiO(2)之间协同效应的光生电子和空穴的高效分离效率。值得注意的是，由于其一维纳米结构特性，TiO(2)@C NFs 很容易回收。
