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Plasmon Ag decorated 3D urchinlike N-TiO2−x for enhanced visible-light-driven photocatalytic performance
Journal of Colloid and Interface Science ( IF 9.9 ) Pub Date : 2018-03-12 , DOI: 10.1016/j.jcis.2018.03.030
Jiaojiao Jiang , Zipeng Xing , Meng Li , Zhenzi Li , Junwei Yin , Junyan Kuang , Jinlong Zou , Qi Zhu , Wei Zhou

Plasmon Ag decorated 3D urchinlike N-TiO2−x 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-TiO2−x 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−1 g−1 and 97.7% under visible light irradiation, which are about 4.2 and 5.4 folds greater than that of N-TiO2. The mechanism of photocatalytic process is also proposed, and the enhanced photocatalytic property is mainly due to the synergistic reaction of the Ti3+ 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.



中文翻译:

等离子银装饰的3D urchinlike N-TiO 2-x增强可见光驱动的光催化性能

等离子银修饰的3D urchinlike N-TiO 2-x光催化剂通过简便的水热处理(180°C)成功地合成,并与光沉积方法结合,然后进行还原处理。结果表明,所得的Ag / N-TiO 2-x样品具有高锐钛矿结晶度的三维(3D)urchinlike纳米结构。同时,它具有窄的光学带隙(Eg〜2.61eV)和优异的可见光驱动的光催化性能。此外,在可见光照射下,苯酚的产氢率和光催化降解率分别达到186.2μmolh -1  g -1和97.7%,比N-TiO 2分别高4.2倍和5.4倍。还提出了光催化过程的机理,其增强的光催化性能主要归因于Ti 3+与N共掺杂的协同反应,从而使能带隙变窄,有利于可见光的利用,以及Ag纳米粒子的等离激元效应。以及独特的3D urchinlike结构,有利于光生载流子的分离和传输。

更新日期:2018-03-12
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