Fig. 1From: Facile synthesis of reduced graphene oxide by Tecoma stans extracts for efficient removal of Ni (II) from water: batch experiments and response surface methodologySEM micrographs (left) and EDX (right) of (a) graphite oxide (GO), and reduced graphene oxide (rGO) with (b) 5 mg mL− 1, (c) 25 mg mL− 1, (d) 50 mg mL− 1 Tecoma stans leaves extractBack to article page