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首页> 外文期刊>Materials Science and Engineering >Nanostructured LaFeO_3-MoS_2 for efficient photodegradation and photocatalytic hydrogen evolution
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Nanostructured LaFeO_3-MoS_2 for efficient photodegradation and photocatalytic hydrogen evolution

机译：纳米结构Lafeo_3-MOS_2，用于高效光降解和光催化氢气进化

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Fabrication of heterogeneous photocatalysts has received increasing research interest due to their potential applications for the degradation of organic pollutants in wastewater and evolution of carbon-free hydrogen fuel via water splitting. Here, we report the photodegradation and photocatalytic hydrogen generation abilities of nanostructured LaFeO_3-MoS_2 photocatalyst synthesized by facile hydrothermal technique. Prior to conducting photocatalytic experiments, structural, morphological and optical properties of the nanocomposite were extensively investigated using X-ray diffraction analysis, field emission scanning electron microscopy and UV-visible spectroscopy, respectively. Nanostructured LaFeO_3-MoS_2 photodegraded ～ 96％ of rhodamine B dye within only 150 minutes which is considerably higher than that of LaFeO_3 and commercial Degussa P25 titania nano-particles. The LaFeO_3-MoS_2 nanocomposite also exhibited significantly enhanced photocatalytic efficiency in the decomposition of a colorless probe pollutant, ciprofloxacin eliminating the possibility of the dye-sensitization effect. Moreover, LaFeO_3-MoS_2 demonstrated superior photocatalytic activity towards solar hydrogen evolution via water splitting. Considering the band structures and contribution of reactive species, a direct Z-scheme photocatalytic mechanism is proposed to rationalize the superior photocatalytic behavior of LaFeO_3-MoS_2 nanocomposite.
机译：由于其潜在的应用，在废水中的有机污染物的潜在应用和通过水分裂的碳氢燃料的演化，因此通过潜在的应用增加了越来越多的研究兴趣。在这里，我们通过容易水热技术报告了纳米结构Lafeo_3-MOS_2光催化剂的光降解和光催化氢气产生能力。在进行光催化实验之前，分别使用X射线衍射分析，场发射扫描电子显微镜和UV可见光谱，广泛研究纳米复合材料的结构，形态学和光学性质。纳米结构Lafeo_3-MOS_2光降解〜96％的罗丹明B染料仅在150分钟内，其远高于Lafeo_3和商业Degussa P25二氧化钛纳米粒子。 Lafeo_3-MOS_2纳米复合材料在无色探针污染物的分解中也表现出显着提高的光催化效率，CiProfloxacin消除了染料敏化效果的可能性。此外，Lafeo_3-MOS_2通过水分解显示出朝向太阳氢进化的优异的光催化活性。考虑到反应性物种的带状结构和贡献，提出了一种直接Z形式光催化机理，使Lafeo_3-MOS_2纳米复合材料的优异光催化行为合理化。

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