Role of Anions in the Synthesis and Crystal Growth of Selected Semiconductors

Abstract

The ideal methods for the preparation of semiconductors should be reproducible and possess the ability to control the morphology of the particles with monodispersity yields. Apart from that, it is also crucial to synthesize a large quantity of desired materials with good control of size, shape, morphology, crystallinity, composition, and surface chemistry at a reasonably low production cost. Metal oxides and chalcogenides with various morphologies and crystal structures have been obtained using different anion metal precursors (and/or different sulfur sources for chalcogenides in particular) through typical synthesis methods. Generally, spherical particles are obtained as it is thermodynamically favorable. However, by changing the anion precursor salts, the morphology of a semiconductor is influenced. Therefore, precursors having different anions show some effects on the final forms of a semiconductor. This review compiled and discussed the effects of anions (NO3−, Cl−, SO42-, CH3COO−, CH(CH3)O−, etc.) and different sources of S2- on the morphology and crystal structure of selected metal oxides and chalcogenides respectively.

Visible-Light-Induced Photocatalytic and Photoantibacterial Activities of Co-Doped CeO2

“…The modification in shape and size as well as incorporation of dopants could result in the formation of surface defects such as V o which promotes the reduction of Ce 4+ to Ce 3+ . 8,9 The mixed state of Ce 3+ /Ce 4+ redox reactions is also responsible for the enhanced optical and biological properties of the CeO 2 nanostructures. 7 In addition, dopants with different ionic states in CeO 2 can generate more structural defects in order to gain charge neutrality, which enhances its physical and optical properties as well as its compatibility in biological area.…”

“…The morphology and particle size of CeO 2 have been reported to have effects on photocatalytic/catalytic applications. The modification in shape and size as well as incorporation of dopants could result in the formation of surface defects such as V o which promotes the reduction of Ce 4+ to Ce 3+ . , The mixed state of Ce 3+ /Ce 4+ redox reactions is also responsible for the enhanced optical and biological properties of the CeO 2 nanostructures …”

α-Glucosidase Inhibitory Activity and Cytotoxicity of CeO2 Nanoparticles Fabricated Using a Mixture of Different Cerium Precursors

“…In addition, the function of counteranion in the precursors of metal salts has not been subjected to significant research on nanomaterials. It has been suggested that the anions might be selectively adsorbed on the facets, which would affect the morphological and structural characteristics of the synthesized materials. , …”

“…It has been suggested that the anions might be selectively adsorbed on the facets, which would affect the morphological and structural characteristics of the synthesized materials. 19,20 This article is licensed under CC-BY-NC-ND CeO 2 NPs have especially gained attention as they exhibit an enormous range of applications in the biomedical area. 10,21 So far, biomedical studies on diagnosing and treating life-threatening diseases using CeO 2 have shown potentially good performance.…”

Sm2O3 and Sm2O3-based nanostructures for photocatalysis, sensors, CO conversion, and biological applications

“…The size of nanoparticles can be crucial as it can influence the physicochemical properties of the NPs. 2,3 NPs are categorized into different classes and one of them is semiconductor NPs. Semiconductor materials possess properties between metals and nonmetals and therefore various applications have been found.…”