Fig. 2: Morphology of different samples.

a–c SEM and a1–c1 TEM images of a, a1 Gr, b, b1 Gr/LDH obtained under optimization condition and c, c1 Gr/LDH after ultrasonic oscillation for 2 h.

a–c SEM and a1–c1 TEM images of a, a1 Gr, b, b1 Gr/LDH obtained under optimization condition and c, c1 Gr/LDH after ultrasonic oscillation for 2 h.