Compositional control of the photocatalytic activity of Ga2O3 nanocrystals enabled by defect-induced carrier trapping

Growth and Photocatalytic Properties of Gallium Oxide Films Using Chemical Bath Deposition

“…The Ga 2 O 3 material can be used for various device applications, such as gas sensors [15], catalysis [16], power and high voltage electronic 2 of 9 devices [13] because it has unique conductive properties and is electrically and thermodynamically stable [17][18][19]. Various polymorphs of Ga 2 O 3 as the photocatalysts in the degradation of organic dyes have been studied previously [11,[20][21][22]. Reddy et al [11] have reported that the photodegeneration efficiencies of α-Ga 2 O 3 and β-Ga 2 O 3 nanorods for the rhodamine B aqueous solution were 62% and 79%, respectively.…”

“…Zhao et al [21], have demonstrated that the photodegeneration efficiency of β-Ga 2 O 3 nanorods in the perfluorooctanic acid can reach 98.8%. In addition, the photocatalytic activity of the γ-Ga 2 O 3 in rhodamine 590 degradation has also been investigated by Jin et al [22].…”

Phase junction enhanced photocatalytic activity of Ga2O3 nanorod arrays on flexible glass fiber fabric

“…47 Furthermore, the photocatalytic degradation process of these Ga 2 O 3 NRAs were tted using the rst-order kinetic curve according to the Langmuir-Hinshelwood model. 32,52 As shown in Fig. 4(b (ethylenediamine tetraacetic acid, h + trapping agents), IPA (isopropyl alcohol, cOH trapping agents) and BQ (benzoquinone, cO 2 À trapping agents), respectively.…”

“…[17][18][19][20][21][22] It has extensively been applied to power devices, [23][24][25] solar-blind ultraviolet (UV) photodetectors, [26][27][28][29] gas sensors, 30 solar cells 31 and photocatalysis. 32,33 For photocatalysis applications, related studies claim that Ga 2 O 3 can theoretically exhibit better and more stable photocatalytic activity than commercial TiO 2 and realize the degradation of refractory pollutants. 34,35 This is attributed to the extraordinary redox capability of photogenerated electron-hole pairs.…”

Defects and impurities in colloidal Ga2O3 nanocrystals: new opportunities for photonics and lighting

“…9 Examples include the generation of localized surface plasmon resonance in TCO nanocrystals (NCs), [15][16][17] room-temperature ferromagnetism in diluted D r a f t magnetic semiconductor oxide (DMSO) NCs, 6,[18][19][20][21][22] size-and composition-tunable light emission, [23][24][25] and selective and efficient photocatalysts. [26][27][28][29][30] Among transparent metal oxides, Ga 2 O 3 is considered the widest band gap semiconductor. Although the first systematic studies of Ga 2 O 3 were reported back in 1950's and 1960's, 7,31,32 it has been much less investigated over the ensuing decades compared to other oxides, such as ZnO, TiO 2 , or SnO 2 .…”