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. 2012 Jun 11;12(6):8013–8025. doi: 10.3390/s120608013

Figure 1.

Figure 1.

XRD patterns of CuO and Cr-doped CuO nanostructures. (a) as-prepared CuO nanosheets; (b) as-prepared 0.76Cr-CuO nanosheets; (c) as-prepared 2.2Cr-CuO nanorods, (d) CuO nanosheets after heat treatment at 500 °C for 1 h, (e) 0.76Cr-CuO nanosheets after heat treatment at 500 °C for 1 h, and (f) 2.2Cr-CuO nanorods after heat treatment at 500 °C for 1 h.