The enhanced photocatalytic activity of g-C3N4-LaFeO3 for the water reduction reaction through a mediator free Z-scheme mechanism
The enhanced photocatalytic activity of g-C3N4-LaFeO3 for the water reduction reaction through a mediator free Z-scheme mechanism
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DOI：
10.1039/c7qi00115k
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发表时间：
2017-06-01
影响因子：
7
通讯作者：
Parida, K. M.
中科院分区：
文献类型：
--
作者：
Acharya, S.;Mansingh, S.;Parida, K. M.
在此，我们公开了g-C3 N4/LaFeO 3纳米复合光催化剂，一种无介体的直接Z-方案光催化体系，使用具有可靠界面相互作用的机械混合方法制备。通过X射线衍射（XRD），透射电子显微镜（TEM）和X射线光电子能谱（XPS）确定纳米复合材料的形成。利用紫外-可见漫反射光谱（DRS）和光致发光（PL）光谱对纳米杂化物的光学性质进行了表征。结果表明，制备的g-C3 N4/LaFeO 3纳米复合材料具有良好的界面作用和异质结相互作用，其光催化活性较纯g-C3 N4和LaFeO 3有显著提高。高HER（1152 μ mol h（-1）g（-1））也证实了PL光谱，Mott-Schottky图，电化学阻抗谱（EIS），和固-固界面相互作用。
Herein, we disclosed the g-C3N4/LaFeO3 nanocomposite photocatatalyst, a mediator-free direct Z-scheme photocatalytic system, prepared using a mechanical mixing method with reliable interfacial interactions. The nanocomposite formation was determined by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The optical properties of the nanohybrids were also characterized using UV-vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy. The results clearly indicated that the g-C3N4/LaFeO3 nanocomposite was effectively fabricated, with reliable interfacial interactions and a good heterojunction interaction between g-C3N4 and LaFeO3, which can considerably enhance the photocatalytic activity as compared to pristine g-C3N4 and LaFeO3. The high HER (1152 mu mol h(-1) g(-1)) was also confirmed by the PL spectra, Mott-Schottky plot, electrochemical impedance spectroscopy (EIS), and solid-solid interfacial interactions.