Fig. 9

Optical images: a original peanut shell and b DESs pretreated peanut shell; SEM images at different magnifications: c original peanut shell (3000×) and d DESs pretreated peanut shell (3000×)
Optical images: a original peanut shell and b DESs pretreated peanut shell; SEM images at different magnifications: c original peanut shell (3000×) and d DESs pretreated peanut shell (3000×)