Metal Oxysulfides: From Bulk Compounds to Nanomaterials

Abstract

This review summarizes the syntheses and applications of metal oxysulfides. Bulk compounds of rare earth and transition metals are discussed in the section Introduction. After a presentation of their main properties and applications, their structures are presented and their syntheses are discussed. The section Bulk Materials and Their Main Applications is dedicated to the growing field of nanoscaled metal oxysulfides. Synthesis and applications of lanthanide-based nanoparticles are more mature and are discussed first. Then, works on transition-metal based nanoparticles are presented and discussed. Altogether, this review highlights the opportunities offered by metal oxysulfides for application in a range of technological fields, in relation with the most advanced synthetic routes and characterization techniques.

An Overview of Gadolinium-Based Oxide and Oxysulfide Particles: Synthesis, Properties, and Biomedical Applications

“…The analysis of the literature reveals that both oxides and oxysulphides systems have been used recently as contrast agents, detection agents, antimicrobial agents, transport systems (RNA, proteins, peptides, and drugs), and in the formulation of nanovaccines prototypes (see Table 1). Several authors agree that even despite a large number of nanoparticles available for these applications, the main attributes of gadolinium-based compounds make them attractive candidates [5]. In the last decade, the Gd 2 O 3 has been extensively used for biomedical applications, which is attributed to these reasons: (1) The easier production of Gd 2 O 3 than Gd 2 O 2 S, (2) the chemical modification of the Gd 2 O 3 surface is more accessible than Gd 2 O 2 S, and (3) the multifunctionality of Gd 2 O 3 as a contrast agent and therapeutic agent [122].…”

“…In the last decade, the Gd 2 O 3 has been extensively used for biomedical applications, which is attributed to these reasons: (1) The easier production of Gd 2 O 3 than Gd 2 O 2 S, (2) the chemical modification of the Gd 2 O 3 surface is more accessible than Gd 2 O 2 S, and (3) the multifunctionality of Gd 2 O 3 as a contrast agent and therapeutic agent [122]. However, advances in the synthesis methods have allowed a decrease in the particle size and modulation of the shape of the Gd 2 O 2 S. In the same biomedical applications, better results are expected due to the superior optical properties [5].…”

“…Moreover, the Gd 2 O 3 and Gd 2 O 2 S have excellent physicochemical properties related to their high optical response, high thermal and chemical stability, and their capacity to be produced in different shapes, particle sizes, and textures. These attributes make them superior compared to other particles [5]. These are important features in the biomedical field since they allow us to have particles with a large surface area that can be functionalized with ligands to target specific biomolecules [6].…”

Evolution of Non-metallic Inclusions Through Processing in Ti-V Microalloyed 316L and Al-V Microalloyed 17-4PH Stainless Steels for Hipping Applications

“…Earlier work reported in Reference 64 showed that residual Cu (0.14 wt pct) has been found to combine with S (0.043 wt pct) to form CuS, which precipitates on existing MnS inclusions. More recently, a detailed review of metal oxysulfides was published by Larquet and Carenco, [65] in which it was reported that, Cu can form several oxysulfides such as Cu 2 O 1Àx S x , Sr 2 Cu 2 M-nO 2 S 2 , and Sr 2 CuMO 3 S (M = Sc, Cr, Fe).…”

Size and optical versatility in rare earth oxysulfide photonic materials

“…Among rare earth-based optical materials, rare earth oxysulfides RE2O2S (RE 3+ : La, Gd, Y and Lu) are suitable host lattices for luminescent materials due to their high thermal and chemical stability, low toxicity, and good sensitization of trivalent lanthanoid ions (Ln 3+ ), yielding high luminescence efficiency. The latter characteristic allows RE2O2S be versatile optical hosts, meaning that diverse luminescence phenomena can be obtained by tuning the host and dopant composition [12][13][14][15]. However, there are still some challenges and open questions regarding these materials.…”