Catalysis of Rice Straw Hydrolysis by the Combination of Immobilized Cellulase from Aspergillus niger on β-Cyclodextrin-Fe₃O₄ Nanoparticles and Ionic Liquid

Figure 7

Effect of pH on the activity of (■) free cellulase, (●) immobilized cellulase, and (▲) immobilized cellulase + ionic liquid. Morphologies of immobilized cellulase under different pH were analyzed by SEM: (a) original immobilized cellulase; (b) pH = 5.0; (c) pH = 4.0; (d) pH = 3.0; (e) pH = 2.0.