一作张洪彬，王乐，通讯作者白功勋在稀土硫化物绿色制备与光谱调控方面取得新进展，在JAP, JMCC, ACS Sustainable Chemistry & Engineering, Ceramics International等期刊发表论文。

Effect of sodium ions doping on structure and spectral properties of γ-Ce2S3 microcrystals

Authors

Le Wang, Shuqin Zhang, Yinyan Li, Liang Chen, Junjie Zhang, Shiqing Xu, Gongxun Bai

Publication date

2023/7/21

Journal

Journal of Applied Physics

Volume

134

Issue

3

Publisher

AIP Publishing

Description

Rare earth sulfides are environmentally friendly and have excellent physical optoelectronic properties and coloring applications. In particular, red γ-Ce2S3 is an important and popular inorganic optical functional material. However, it has become crucial to improve the production efficiency of γ-Ce2S3 and its color performance and stability. By adding ammonium thiocyanate to the precursor, eco-friendly γ-Ce2S3 with excellent color performance was produced in this study. In addition, the effect of different amounts of Na+ doping on the final product’s purity and the effect of chroma value were systematically investigated. Results show that an increase in Na+ can effectively lower the synthesis temperature of γ-Ce2S3, improve production efficiency, and optimize color performance prior to saturation. Finally, using density functional theory, the influence of the vacancy structure of γ-Ce2S3 and the change of energy band …

Color modulation of cerium sulfide colorant powders through chemical doping engineering

Authors

Hongbin Zhang, Jiasong Zhang, Renguang Ye, Shiqing Xu, Gongxun Bai

Publication date

2023

Journal

Journal of Materials Chemistry C

Volume

11

Issue

27

Pages

9215-9222

Publisher

Royal Society of Chemistry

Description

Due to their non-toxicity, good light resistance, and weather resistance, inorganic rare earth sulfide colorant materials hold promise for 

coatings, outdoor displays, and other applications. However, developing additional types of rare earth sulfide colorants and their 

environmentally friendly preparation processes remains challenging. We have successfully prepared a series of cerium sulfide colorant 

powders in this study using the hydrothermal method and chemical doping engineering. The effect of La3+ doping concentration on 

the crystal structure and spectral properties of γ-Ce2S3 was investigated. The band gap value of cerium sulfide powders increased 

from 2.12 to 2.22 eV as La3+ doping increased. As a result, the color shifts from red to orange-yellow, indicating that La3+ doping 

can alter the chromaticity value effectively. In addition, we have encapsulated the prepared cerium sulfide powders and yellow …

Ion substitution strategy toward spectral tunability of environmentally friendly rare earth sulfide lattices for radiative cooling

Authors

Le Wang, Gongxun Bai, Peng Xue, Shuqin Zhang, Liang Chen, Shiqing Xu

Publication date

2023/9/14

Journal

ACS Sustainable Chemistry & Engineering

Volume

11

Issue

38

Pages

14236-14245

Publisher

American Chemical Society

Description

Radiation cooling technology can effectively reduce the energy transmission of the sun to the building during the day, thus playing a certain positive role in alleviating the urban heat island effect and reducing energy consumption. In this study, red Nd-doped γ-Ce2S3 and orange La-doped γ-Ce2S3 were prepared by the green synthesis method, and their morphologies and optical properties were systematically studied. The color film produced by mixing the prepared microcrystalline powder with poly(vinylidene fluoride-hexafluoro propylene) at a certain proportion has near-infrared reflectivity and superior environmental resistance, achieving effective cooling of 3–6 °C when applied to the building surface. This study expands ideas for energy-efficient building materials and enriches the path to a carbon neutral sustainable future.