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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Synthesis of the graphene-ZnTiO3 nanocomposite for solar light assisted photodegradation of methylene blue
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Synthesis of the graphene-ZnTiO3 nanocomposite for solar light assisted photodegradation of methylene blue

机译：太阳能辅助光降解亚甲基蓝的石墨烯-ZnTiO3纳米复合材料的合成

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Cubic and hexagonal phase zinc titanate (ZT) nanoparticles were synthesized via simple chemical precipitation method. The graphene-zinc titanate (GZT) nanocomposites were prepared by using the synthesized ZT nanoparticles and graphene oxide as precursors. The synthesized materials were characterized by various spectroscopic techniques. The agglomerated ZT nanoparticles anchored on graphene sheets are clearly visible in the field emission scanning electron micrograph (FE-SEM) image. Raman mapping of the GZT nanocomposites revealed the homogeneity and distribution of ZT nanoparticles on the surface of graphene. The UV-visible absorption and photoluminescence spectra of the samples suggest that the GZT nanocomposites can be used as efficient photocatalysts to remove organic dye from water. The photocatalytic activity of the synthesized photocatalysts was evaluated by the photodegradation of methylene blue dye under sunlight irradiation. The enhanced absorption in the visible region of the GZT samples compared to the ZT samples played a vital role during the photocatalysis. The hexagonal phase GZT nanocomposite displayed remarkable photocatalytic activity compared to the bare ZT nanoparticles. The possible electron transfer mechanism for graphene-ZT interface during the photocatalysis process is also proposed. Furthermore, the reusability and stability tests for the prepared photocatalysts were made and reported.
机译：通过简单的化学沉淀法合成了立方相和六方相的钛酸锌（ZT）纳米粒子。以合成的ZT纳米粒子和氧化石墨烯为前驱体制备了石墨烯-钛酸锌（GZT）纳米复合材料。合成的材料通过各种光谱技术表征。在场发射扫描电子显微照片（FE-SEM）图像中清晰可见锚定在石墨烯片上的团聚ZT纳米颗粒。 GZT纳米复合材料的拉曼作图显示了ZT纳米粒子在石墨烯表面的均匀性和分布。样品的紫外-可见吸收和光致发光光谱表明，GZT纳米复合材料可用作有效的光催化剂，可从水中去除有机染料。通过在阳光照射下亚甲基蓝染料的光降解来评估合成的光催化剂的光催化活性。与ZT样品相比，GZT样品在可见光区域的吸收增强在光催化过程中起着至关重要的作用。与裸露的ZT纳米粒子相比，六方相GZT纳米复合材料显示出显着的光催化活性。还提出了光催化过程中石墨烯-ZT界面可能的电子转移机理。此外，还对制备的光催化剂进行了可重复使用性和稳定性测试。

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