Dear Manasa

Generally, using the Bragg's Law of diffraction, you can calculate d-spacing parameter. By using the lattice parameter (a) and d-spacing (d), you can easily calculate the Miller indices of the plane which is correlated to the XRD peak. For cubic symmetry: d = a/sqrt(h^2+k^2+l^2).

In addition, you can use the following questions, where the same issues were discussed.

https://www.researchgate.net/post/How_to_calculate_lattice_constant_from_XRD_pattern

https://www.researchgate.net/post/How_to_calculate_hkl_values_from_XRD_without_knowing_lattice_parameter

https://www.researchgate.net/post/How_do_you_determine_the_crystal_planes_from_an_XRD_pattern

Best regards

It seems to be 002 graphite peak with increased interlayer spacing due to the high degree of functionalization (similar to graphene oxide). I recommend to find several papers with XRD of CDs, you will find a lot of XRD patterns with 002 peak at different 2theta.

Hi

Please check the peaks with JCDPCS file. It will give u correct results