Zhao Qianqian, Feng Guo, Jiang Feng, Lan Shanfang, Chen Junhua, Liu Mengting, Huang Zuzhi, Liu Jianmin, Hu Qing, Jiang Weihui
Department of Material Science and Engineering, Jingdezhen Ceramic Institute Jingdezhen 333000 China
National Engineering Research Center for Domestic & Builing Ceramics, Jingdezhen Ceramic Institute Jingdezhen 333000 China
RSC Adv. 2020 Dec 9;10(71):43762-43772. doi: 10.1039/d0ra07884k. eCollection 2020 Nov 27.
FeTiO/C photocatalysts were synthesized by a solid-state reaction method (FeTiO/C) and nonhydrolytic sol-gel (NHSG) method (FeTiO/C), where C was introduced by external carbon and carbon sources, respectively. The FeTiO/C photocatalyst with carbon has much better photocatalytic degradation efficiency than that of FeTiO/C synthesized by doping external carbon. The superiorities of carbon were demonstrated by SEM, EDS, BET and photoelectrochemical analysis. Compared with FeTiO/C using external carbon as a carbon source, FeTiO/C with carbon exhibits more uniform elemental distribution, much larger surface area, higher photocurrent density and lower resistivity of interfacial charge transfer. The results show that the introduction of carbon the NHSG method more easily promotes the separation of photogenerated electron-hole pairs, owing to the uniformity of the carbon element, thereby improving the photocatalytic activity of the photocatalyst.
通过固态反应法（FeTiO/C）和非水解溶胶-凝胶法（NHSG）（FeTiO/C）合成了FeTiO/C光催化剂，其中碳分别由外部碳和碳源引入。含碳的FeTiO/C光催化剂的光催化降解效率比通过掺杂外部碳合成的FeTiO/C光催化剂要好得多。通过扫描电子显微镜（SEM）、能谱分析（EDS）、比表面积分析（BET）和光电化学分析证明了碳的优势。与以外部碳为碳源的FeTiO/C相比，含碳的FeTiO/C表现出更均匀的元素分布、更大的表面积、更高的光电流密度和更低的界面电荷转移电阻。结果表明，由于碳元素的均匀性，通过NHSG法引入碳更容易促进光生电子-空穴对的分离，从而提高光催化剂的光催化活性。
