Effects of the precursor size on the morphologies and properties of γ-Ce2S3 as a pigment

Preparation and application of rare earth sulfides

“…物La 2 S 3 、Ce 2 S 3 、Eu 3 S 4 和EuS等 [35] , 以及重稀土硫化 物Yb 2 S 3 、Sc 2 S 3 等 [34] . 于世泳等 [36] 采用水热法制备了 Ce 2 S 3 [30] , CeS [31] 其他固相法 化学浴沉积法(CBD) 在搅拌下将硫阴离子溶液加入稀土 离子络合溶液中，然后将衬底浸 入，稀土硫化物沉积在衬底上 简单、经济、易于 控制 步骤繁琐、难以操作 La 2 S 3 [57] , Ce 2 S 3 [58] and Sm 2 S 3 [59]…”

“…图 6 煅烧、硫化后样品的SEM照片(每张照片标注了样品号、前驱体大小和制备温度) [36] Figure 6 SEM photographs of samples after calcination and sulfurization (The sample number, size of precursors and preparing temperature are labeled in each photograph) [36].…”

Ion Substitution Strategy toward Spectral Tunability of Environmentally Friendly Rare Earth Sulfide Lattices for Radiative Cooling

“…The rare earth sesquisulfide (γ-Ce 2 S 3 ) has a three-dimensional lattice structure of a high-temperature phase, showing a Th 3 P 4 cubic structure. The generation of γ-Ce 2 S 3 often requires a temperature of up to 1200 °C , and the use of sulfide gas H 2 S and CS 2 , posing a challenge to the window implementation of traditional production methods and a risk of gas leakage. – To date, many studies have been performed on reducing the reaction window temperature by ion doping, – and γ-Ce 2 S 3 was successfully prepared at 850 °C by introducing Na + into the reaction, enabling great improvement in production efficiency by reducing the reaction temperature . Additionally, researchers have also investigated the effect of Sr 2+ doping on the color value and thermal stability of γ-Ce 2 S 3 . , Our group has also previously investigated the effect of Na + doping on the structure and spectral properties of γ-Ce 2 S 3 microcrystals and the effect of La 3+ doping on the color of γ-Ce 2 S 3 . , The ions introduced during the doping process were shown to not only fill the vacancy of γ-Ce 2 S 3 , but also replace the Ce atoms, making the crystal structure more stable. – The change of pigment color can also be explained by transition theory at the electron level, with the Ce electron transition from the 4f energy level to the 5d energy level as the main reason for the optical transition in the visible spectrum, which is also the main reason why γ-Ce 2 S 3 finally presents a red color. – Moreover, γ-Ce 2 S 3 can gradually decompose at room temperature, releasing the toxic gas H 2 S and losing its inherent red color, so it is necessary to adopt a coating process to improve its thermal stability and oxidation resistance. – …”

Promoting thermal stability and acid resistance of rare earth sulfide powders by coating ZnO and SiO2 double shells

“…To improve the stability of the material, researchers cover a layer of oxide as the “protective layer” on cerium sulfide, enhancing the material's thermal stability and oxidation resistance 8‐11 . Some groups have realized many excellent works in γ‐Ce 2 S 3 powders by coating protective surface layers 9‐13 . For instance, Li and Song et al.…”