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. 2019 Mar 5;14:78. doi: 10.1186/s11671-019-2914-1

Fig. 5.

Fig. 5

Catalytic reduction of 4-NP via present synthesized CNT-Cu2O nanocomposites. a CNT-Cu-30-1. b CNT-Cu-60-1. c CNT-Cu-30-6. d The photos of 4-NP solution before and after the catalytic process