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Topics in Current Chemistry (2020) 378:2
the obtained material in order to form a solid-state sensor by pelletization and
application to an Ag–pellet–Ag electrode configuration. This sensor was found to
possess a sensitivity toward liquefied petroleum gas (LPG). The author linked this
to the blue-shift of the optical bandgap and to the nanoscaled morphology of the
obtained ball-milling-derived nanoparticles.
In 2016, Rejender and Giri [125] presented an anomalous strain-evolution,
crystallographic phase alteration, and bandgap narrowing by strain engineering
using ball milling and commercially available TiO 2 powder as the precursor (particle size around 80 nm and bandgap 3.14 eV). Except for the decrement in size
to 7–18 nm, the finally obtained TiO 2 nanocrystals (NCs) found to obtain a new
crystallographic phase of Ti 3 O 5 , as well as a narrow bandgap of 2.71 eV.
Another interesting application of the wet ball-milling process was reported the
same year by Jung et al. [126] for the TiO 2 nano-coating of boron particles. Briefly,
a tungsten carbide milling jar was filled with titanium(IV) isopropoxide, boron powder (average particles’ size ~ 800 nm), and hexane inside a glove box filled with nitrogen. The as-received suspension was further treated and washed with ethanol inside
an US bath. They found that increase of the milling duration can lead to decrease of
the final particle size, even up to ~ 150 nm. The particles were coated with an amorphous titania-containing layer (estimated 10 nm). The drawback of the extension of
the ball milling was the incorporation of impurities, predominately tungsten, from
the jar and balls, as can be seen in energy-dispersive X-ray (EDX) analysis (Fig. 19).
The ball-milling-derived TiO 2 -coated nanoparticles were promising for hydrogen
and oxygen evolution reactions (HERs, OERs) in photoelectrochemical applications.
Fig. 19 TEM image (a) and EDX maps (b–d) of TiO 2 -coated boron particles wet-milled for 8 h.
Reprinted with permission from [126]. Copyright (2016) MDPI
57
Reprinted from the journal
Topics in Current Chemistry (2020) 378:2
the obtained material in order to form a solid-state sensor by pelletization and
application to an Ag–pellet–Ag electrode configuration. This sensor was found to
possess a sensitivity toward liquefied petroleum gas (LPG). The author linked this
to the blue-shift of the optical bandgap and to the nanoscaled morphology of the
obtained ball-milling-derived nanoparticles.
In 2016, Rejender and Giri [125] presented an anomalous strain-evolution,
crystallographic phase alteration, and bandgap narrowing by strain engineering
using ball milling and commercially available TiO 2 powder as the precursor (particle size around 80 nm and bandgap 3.14 eV). Except for the decrement in size
to 7–18 nm, the finally obtained TiO 2 nanocrystals (NCs) found to obtain a new
crystallographic phase of Ti 3 O 5 , as well as a narrow bandgap of 2.71 eV.
Another interesting application of the wet ball-milling process was reported the
same year by Jung et al. [126] for the TiO 2 nano-coating of boron particles. Briefly,
a tungsten carbide milling jar was filled with titanium(IV) isopropoxide, boron powder (average particles’ size ~ 800 nm), and hexane inside a glove box filled with nitrogen. The as-received suspension was further treated and washed with ethanol inside
an US bath. They found that increase of the milling duration can lead to decrease of
the final particle size, even up to ~ 150 nm. The particles were coated with an amorphous titania-containing layer (estimated 10 nm). The drawback of the extension of
the ball milling was the incorporation of impurities, predominately tungsten, from
the jar and balls, as can be seen in energy-dispersive X-ray (EDX) analysis (Fig. 19).
The ball-milling-derived TiO 2 -coated nanoparticles were promising for hydrogen
and oxygen evolution reactions (HERs, OERs) in photoelectrochemical applications.
Fig. 19 TEM image (a) and EDX maps (b–d) of TiO 2 -coated boron particles wet-milled for 8 h.
Reprinted with permission from [126]. Copyright (2016) MDPI
57
Reprinted from the journal