Beneficial from the excellent optical performance of zinc oxide (ZnO) nanocrystals and the absorption properties of graphene oxide (GO), the nanocomposites of ZnO and GO with synergistic photocatalytic effects were prepared by a precipitation method, in which GO is utilized as the catalyst carrier. The prepared composites were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy and also performed photocatalytic activity for the nanocomposites. The results show that ZnO is uniformly loaded on the surface of GO assisted by an effective interface coupling. Due to interface coupling between ZnO and GO, electrons can be directly transferred from the valence band of ZnO to GO. The photodegradation efficiency of the composites reaches to 97.6%, and the first-order reaction rate constant of photodegradation is calculated to be 0.04401 min^-1. The novel ZnO-GO composites with excellent photocatalytic performance display promising potential applications in the field of photocatalysis and will provide a new platform for building next-generation graphene-based semiconductor composites.

中文翻译：

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ZnO-GO复合材料的绿色合成对亚甲基蓝的光催化降解

受益于氧化锌（ZnO）纳米晶体的优异光学性能和氧化石墨烯（GO）的吸收性能，采用沉淀法制备了具有协同光催化作用的ZnO和GO纳米复合材料，其中GO被用作催化剂载体。通过X射线衍射，X射线光电子能谱，紫外可见光谱，场发射扫描电子显微镜和透射电子显微镜对所制备的复合材料进行表征，并对纳米复合材料具有光催化活性。结果表明，在有效的界面耦合作用下，ZnO均匀地负载在GO的表面。由于ZnO和GO之间的界面耦合，电子可以直接从ZnO的价带转移到GO。^-1。具有优异光催化性能的新型ZnO-GO复合材料在光催化领域显示出广阔的应用前景，并将为构建下一代石墨烯基半导体复合材料提供新的平台。