2011
DOI: 10.1021/jp205348p
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Controlled Fabrication of α-GaOOH and α-Ga2O3 Self-Assembly and Its Superior Photocatalytic Activity

Abstract: In this article, we report the fabrication of gallium oxide (α-Ga2O3) microspheres (GOMs) by a self-assembly process. Gallium nitrate with oxalic acid in a hydrothermal process results in α-GaOOH, which was further converted into gallium oxide by calcinations at 450 °C for 3 h. We first report the formation of various morphological α-GaOOH by using the above-mentioned methodology. The influence of hydrothermal temperature and time on the crystal structure and its morphology was studied, and the results indicat… Show more

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Cited by 102 publications
(68 citation statements)
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“…S2) and TEM ( Fig. S3(a) in ESI) images it is clear that the surface of the micro rods is smooth being similar to that of reported earlier [8,14]. EDX analysis (Fig.…”
Section: Resultssupporting
confidence: 83%
See 3 more Smart Citations
“…S2) and TEM ( Fig. S3(a) in ESI) images it is clear that the surface of the micro rods is smooth being similar to that of reported earlier [8,14]. EDX analysis (Fig.…”
Section: Resultssupporting
confidence: 83%
“…S3(b-d)) clearly exemplifies the mesoporus nature of micro rods. To search out new morphologically interesting materials, biuret was replaced by oxalic acid for which at least GaOOH microspheres have been reported earlier [14,15]. Interestingly, with hydothermal process method 2, we observed the formation of micro flowers morphology ( Fig.…”
Section: Resultsmentioning
confidence: 81%
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“…However, the XRD pattern changed drastically if the Pt precursor was calcined in air (see line a in Figure 3). Beside the wurtzite-type structure, significant amount of a new phase appeared, which could be identified as α-GaOOH (# 87-1901) [48,49]. The XPS characteristics of selected reduced or calcined Ga-Zn-oxynitrides (Supplementary Material section S2, Table S2) were essentially undistinguishable from those of the as synthesized materials, confirming that neither reduction nor calcination altered even the surface of the photocatalysts if they were free of Pt.…”
Section: Loading Of the Pt Co-catalystmentioning
confidence: 87%