In₂S₃ Micropompons and Their Conversion to In₂O₃ Nanobipyramids:  Simple Synthesis Approaches and Characterization

Abstract

In 2 S 3 micropompons composed of randomly oriented flakes of ∼10 nm thickness were synthesized in high yield by a facile hydrothermal process. When the product was thermally oxidized at 600°C, single crystalline well-faceted body-centered cubic (bcc) In 2 O 3 bipyramids of sizes between 50 and 300 nm were obtained. It was proposed that the growth of the In 2 S 3 nanoflakes was initially controlled by the Ostwald ripening process, and finally the aggregation of the flakes led to the development of the micropompons. The growth of the In 2 O 3 bipyramids from the In 2 S 3 micropompons started with the formation of In 2 O 3 nulclei at the surface of the micropompons causing the destruction of the flakelike structure to produce In 2 O 3 bipyramids. The micropompons showed good optical properties due to a strong quantum confinement effect. In 2 O 3 bipyramids showed near-band-edge (NBE) UV emission, which was mainly attributed to the high crystal quality of the bipyramids. The study may provide guidance for the morphology controllable synthesis of different nanostructures and may help in exploring the crystal growth process.

Growth of Crystalline AgIn5S8 Thin Films on Glass Substrates from Aqueous Solutions

“…On the other hand, the In 2 O 3 crystal phase appeared due to high-temperature transformation. 28 EDX analysis of the sample annealed at 673 K shows the composition ratio of [Ag]/ [In]/[S] ) 1:9.6:16.4. Although EDX is not suitable for detailed elemental analysis, it did show the trend of compositional changes of different preparative conditions.…”

Synthesis of self-assembled mesoporous 3D In2O3 hierarchical micro flowers composed of nanosheets and their electrochemical properties

“…[1][2][3][4][5][6] Versatile morphological properties of In 2 O 3 are demonstrated in several studies, wherein various shapes, such as nanocubes, nanorods and microspheres, have been reported. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Generally, In(OH) 3 and InOOH are used as precursors for the synthesis of In 2 O 3 . [7][8][9][10][11][12][13][14][15][16][17][18][19][20] Synthesis of In 2 O 3 via In(OH) 3 /In 2 S 3 as an intermediate mesostructure, followed by calcination, presents an interesting option which allows variation of morphology and porosity due to the intermediate structure which is eventually oxidized to In 2 O 3 .…”

Investigation of the Physical Properties of Sprayed Nanocrystalline In2S3 Films

“…It can also be used as a catalyst and a luminophore, and in buffer layers, electrodes, and gas sensors, because of its catalytic, optical, electronic, and gas-sensing properties. [4][5][6][7][8][9][10][11][12][13][14] In 2 S 3 can also be used for fabrication of oxygen gas sensors, because of the dependence of its conductance on oxygen adsorption and desorption. Oxygen gas sensors are widely used in medical, environmental, and domestic applications.…”