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. 2018 May 29;8(35):19499–19511. doi: 10.1039/c8ra03623c

Fig. 2. (a and b) XRD patterns of different powder CuO catalysts prepared aging for 2–72 h followed by UAHP at 90 °C for 2 h and subsequent calcination in ambient air at 400 °C for 2–4 h as compared to the reference pattern of tenorite CuO; (i) reference CuO (ii) CuO(A2 hC2 h), (iii) CuO(A24 hC2 h) (iv) CuO(A24 hC4 h) and (v) CuO(A72 hC2 h) nanoparticles.

Fig. 2