The Advances in Civil Engineering Materials by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9789811325113
Publisher: Springer Singapore

3 Results and Discussions

3.1 TEM

Figure 1 shows the TEM images of the NBP, with ellipsoidal nanoparticles while, the grain size distribution of the NBP during the grinding time which obtained from the TEM images is shown in Fig. 2. The agglomeration of nanoparticles in the micrograph attributed to the high surface energy and strong surface tension of ultrafine nanoparticles. Moreover, the fine particle size resulted in a large surface area, which enhanced the catalytic activity of the nanoparticle. The NBP grain sizes were 300–325, 125–150, and 10–20 nm for the grinding time durations of 5, 10, and 15 h, respectively. Grinding duration time of 15 h was selected as the optimum duration time to produce a nano bauxite powder with major nanoparticles size ranging from 10 to 20 nm.

Fig. 1.Transmission electron microscopy (TEM) images of the nano bauxite powder (NBP)

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