Comment on "High-surface-area corundum by mechanochemically induced phase transformation of boehmite".

Li, Jiangong; Pu, Sanxu; Cao, Wenbin; Li, Lu; Guo, Ruiyun · Science · 2020

editorial · Level V

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Abstract

Amrute <i>et al</i> (Reports, 25 October 2019, p. 485) claimed that no methods were able to produce high-purity α-Al<sub>2</sub>O<sub>3</sub> with surface areas greater than 100 m<sup>2</sup> g<sup>-1</sup>, even though much higher surface areas up to 253 m<sup>2</sup> g<sup>-1</sup> have been reported. Moreover, the materials they obtained could be porous aggregates and may not be 13-nm nanoparticles, as claimed.