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. 2023 May 30;11:1114454. doi: 10.3389/fchem.2023.1114454

FIGURE 9.

FIGURE 9

Adsorption of different substrates on the SnO2/MPz composite. The photocatalyst (20 mg) was immersed into 30 mL of solution containing glucose (0.06 mmol), glucaric acid (0.06 mmol), gluconic acid (0.06 mmol), and formic acid (0.06 mmol). The suspension system was stirred for 24 h in the dark at ambient temperature, and then, the filtered solution was used to analyze.