Facile Synthesis of SrNbO2N Nanoparticles with Excellent Visible-light Photocatalytic Performances
Facile Synthesis of SrNbO2N Nanoparticles with Excellent Visible-light Photocatalytic Performances
复制标题
轻松合成具有优异可见光催化性能的SrNbO2N纳米颗粒
DOI：
10.1016/j.matlet.2015.03.104
复制
发表时间：
2015
影响因子：
3
通讯作者：
Minhua Cao
中科院分区：
文献类型：
--
作者：
Jianqiang Wang;Xia Wang;Bing Liu;Xianghua Li;Minhua Cao
采用溶剂热法合成了平均粒径约为40 nm的钙钛矿型SrNbO2N纳米粒子，并对其进行了氮化处理。所得的SrNbO2N纳米粒子具有1.94 eV的窄带隙，从而确保其可见光吸收。在可见光照射下（λ>420 nm），均匀的SrNbO2N纳米粒子表现出较高的光催化放氢活性（H2释放速率为148.3 μmol h−1g−1）和亚甲基蓝降解效率。其优异的光催化活性是由于纳米粒子的小尺寸、大比表面积、合适的电子结构以及有效的载流子分离等协同作用的结果。本发明对类似钙钛矿型氮氧化物的合成具有重要的指导意义。
Perovskite-type SrNbO2N nanoparticles with an average diameter of ~40 nm were synthesized via a solvothermal method followed by post-nitridation treatment. The resultant SrNbO2N nanoparticles have a narrow band gap of 1.94 eV, thus ensuring their visible light absorption. In particular, the photocatalytic studies revealed that the uniform SrNbO2N nanoparticles exhibited high photocatalytic activity for H2evolution (H2release rate is 148.3 μmol h−1g−1) and high degradation efficiency for methylene blue under visible light irradiation (λ>420 nm). The excellent photocatalytic activity can be attributed to the synergistic effects of the relatively small size nanoparticles with large specific surface area, the appropriate electronic structure as well as the efficient charge carrier separation. The preparation method has an important guiding significance for the synthesis of similar perovskite-type oxynitrides.