1 3
Topics in Current Chemistry (2020) 378:2
argon atmosphere. In order to avoid the high temperature as a result of the BM process, after milling for 0.5 h, there was an interruption for also 0.5 h. The as-received
material was immersed in a highly concentrated HNO 3 aqueous solution (13.14 M)
for dealloying. The obtained nanorods (Fig. 22) revealed a good photocatalytic degradation capability against the dye methyl orange under UV light irradiation, via the
formation of radicals.
In the work of Zhao et al. [135], the involved steps/mechanism for the formation
of the TiO 2 nanorods from the raw Cu 50 Ti 50 alloy were proposed (Fig. 23). Titanium
metal cannot react with nitric acid due to the presence of an oxide film. With the
mechanical stress that is applied from the ball milling, the dealloying starts by corrosion from the outer surface and the removal of copper atoms and gradually continues to the inner part of the alloy.
Fig. 22 SEM images of ballmilling-derived amorphous
Cu 50 Ti 50 after immersing in
HNO 3 aqueous solution for
48 h. Reprinted with permission
from [135]. Copyright (2014)
Elsevier
61
Reprinted from the journal
Topics in Current Chemistry (2020) 378:2
argon atmosphere. In order to avoid the high temperature as a result of the BM process, after milling for 0.5 h, there was an interruption for also 0.5 h. The as-received
material was immersed in a highly concentrated HNO 3 aqueous solution (13.14 M)
for dealloying. The obtained nanorods (Fig. 22) revealed a good photocatalytic degradation capability against the dye methyl orange under UV light irradiation, via the
formation of radicals.
In the work of Zhao et al. [135], the involved steps/mechanism for the formation
of the TiO 2 nanorods from the raw Cu 50 Ti 50 alloy were proposed (Fig. 23). Titanium
metal cannot react with nitric acid due to the presence of an oxide film. With the
mechanical stress that is applied from the ball milling, the dealloying starts by corrosion from the outer surface and the removal of copper atoms and gradually continues to the inner part of the alloy.
Fig. 22 SEM images of ballmilling-derived amorphous
Cu 50 Ti 50 after immersing in
HNO 3 aqueous solution for
48 h. Reprinted with permission
from [135]. Copyright (2014)
Elsevier
61
Reprinted from the journal