Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
Department of Environmental Science, School of Chemistry and Materials Science, Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, PR China.
J Colloid Interface Sci. 2018 Jul 1;521:102-110. doi: 10.1016/j.jcis.2018.03.030. Epub 2018 Mar 12.
Plasmon Ag decorated 3D urchinlike N-TiO photocatalysts are successfully synthesized by a facile hydrothermal treatment (180 °C) and combined with a photo-deposition approach, followed by a reduction treatment. The results show that the resultant Ag/N-TiO sample possesses a three-dimensional (3D) urchinlike nanostructure with high crystallinity of anatase. Meanwhile, it exhibits the narrow optical band gap (Eg ∼ 2.61 eV) and the excellent visible-light-driven photocatalytic performance. Moreover, the hydrogen generation rate and photocatalytic degradation rate of phenol are up to 186.2 μmol h g and 97.7% under visible light irradiation, which are about 4.2 and 5.4 folds greater than that of N-TiO. The mechanism of photocatalytic process is also proposed, and the enhanced photocatalytic property is mainly due to the synergistic reaction of the Ti and N codoping, which narrows the band gap and favors the utilization of visible light, and the plasmon effect of Ag nanoparticles and unique 3D urchinlike architecture, which are propitious to the separation and transmission of photogenerated carriers.
通过简便的水热法（180°C）和光沉积法结合还原处理，成功合成了等离子体 Ag 修饰的 3D 刺猬状 N-TiO 光催化剂。结果表明，所得 Ag/N-TiO 样品具有高结晶度锐钛矿的三维（3D）刺猬状纳米结构。同时，它表现出窄的光学带隙（Eg∼2.61 eV）和优异的可见光驱动光催化性能。此外，在可见光照射下，氢气生成速率和苯酚的光催化降解率分别高达 186.2 μmol h g 和 97.7%，分别是 N-TiO 的 4.2 和 5.4 倍。还提出了光催化过程的机理，增强的光催化性能主要归因于 Ti 和 N 共掺杂的协同反应，这缩小了带隙，有利于可见光的利用，以及 Ag 纳米粒子的等离子体效应和独特的 3D 刺猬状结构，有利于光生载流子的分离和传输。
