Scanning electron microscopy (SEM) images were collected using a Gemini microscope with 5 kV acceleration voltage. Powder X-ray diffraction (XRD) was performed in Bragg-Brentano geometry using a Bruker D8 Advance diffractometer using a Cu Kα radiation (λ = 1.5406 Å) with a 0.02° step size with a dwell time of 1 s. Raman spectroscopy was performed using a