Dear Ensieh Khalili ,

please have a look at Fig 2 of:

Article Using a novel graphene/carbon nanotubes composite for enhanc...

Best regards

G.M.

Dear Ensieh Khalili the XRD pattern of graphite is characterized by sharp and intense peaks due to its highly ordered, multi-layered structure. In contrast, graphene, particularly when few-layered or monolayered, exhibits broader and less intense peaks, with a significant reduction in the intensity of the (002) peak, reflecting its thinner, less ordered structure. Attached article may help you.

Article Facile and safe graphene preparation on solution based platform

The XRD patterns of graphene and graphite differ significantly because to changes in layer stacking and crystallinity. Graphite's well-ordered, multi-layered structure displays a sharp and intense (002) diffraction peak of about 2𝜃≈26.5 degrees 2θ≈26.5 degrees, which corresponds to an interlayer spacing of around 0.34 nm. This peak represents the regular and periodic stacking of graphene layers. In contrast, graphene, especially in monolayer or few-layer form, displays a much broader and less intense (002) peak, or it may even lack this peak entirely in the case of single-layer graphene. This shows the lack of long-range stacking order and emphasizes the lower dimensionality and higher structural disorder compared to graphite.