Fig. 3From: MgO-ZnO/carbon nanofiber nanocomposite as an adsorbent for ultrasound-assisted dispersive solid-phase microextraction of carbamazepine from wastewater prior to high-performance liquid chromatographic detectionXRD pattern of a CNFs, b ZnO, c MgO-ZnO@CNFs, and d MgOBack to article page