Graphene (GNP)-filled polymethyl methacrylate (PMMA) nanocomposites (NCs) were prepared using a facile casting method. Nanocomposites were fully identified through X-ray diffraction and scanning electron microscopy which confirms some interactions between PMMA and GNP layers lead to a reduction in nanocomposite crystallinity. In this work, the impact of graphene on the optical, electrical characteristics and photocatalytic activity of PMMA polymeric matrix. The rapid increase in absorbance values was observed in the UV-region was linked to the optical transitions of GNP electrons from the valence band to the conduction band. Both the bandgaps (E ^d_g and E ^ind_g ) have been reduced with graphene addition. The calculated Urbach’s Band tail has been increased with GNP content. With the enhanced frequency and GNP contents, the AC electrical conductivity tends to rise. A 1.665 wt% GNP/PMMA exhibits the most effective activity in amoxicillin photodegradation under visible radiation at 30 min due to decrease electron–hole recombination. The kinetics of the photodegradation process was investigated. The GNP/PMMA nanocomposites are a promising candidate in electronic, optoelectrical and environmental applications.

中文翻译：

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石墨烯掺杂的PMMA纳米复合膜在环境光催化中的多功能应用

使用简便的流延法制备了石墨烯（GNP）填充的聚甲基丙烯酸甲酯（PMMA）纳米复合材料（NCs）。纳米复合材料通过X射线衍射和扫描电子显微镜得以完全鉴定，这证实了PMMA和GNP层之间的某些相互作用导致纳米复合材料结晶度降低。在这项工作中，石墨烯对PMMA聚合物基体的光学，电学特性和光催化活性的影响。在紫外区域观察到吸光度值的快速增加与GNP电子从价带到导带的光学跃迁有关。两个带隙（E ^d _g和E ^ind _g ）可以通过添加石墨烯来减少。计算的Urbach's Band尾巴随GNP含量增加。随着频率和GNP含量的增加，AC电导率趋于上升。1.665 wt％的GNP / PMMA在30分钟的可见光辐射下，由于电子-空穴重组的减少，在阿莫西林光降解中表现出最有效的活性。研究了光降解过程的动力学。GNP / PMMA纳米复合材料是电子，光电和环境应用中的有希望的候选者。