Study on synthesis and properties of Na+–La3+ co-doped γ-Ce2S3 pigment by low-temperature self-propagating combustion method

IF 2.3 4区 材料科学 Q2 CHEMISTRY, APPLIED
Boyuan Wu, Yueming Li, Fusheng Song, Kai Li, Yi Sun, Zhumei Wang
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Abstract

Na+–La3+ co-doped γ-Ce2S3 (abbreviated as γ-Na0.5Ce2.5 − xLaxS4) pigments with a fixed Na/(Ce1 − xLax) molar ratio of 0.2 (x = 0, 0.1, 0.5, 0.9, 1.3, 1.7, 2.1 and 2.5) were synthesized by low-temperature self-propagating combustion method. By adjusting the La3+ doping ratio, a series of γ-Na0.5Ce2.5 − xLaxS4 pigments with different colors were obtained by sulfurizing at 900°C for 2 h using CS2 as the sulfur source. The effects of La3+ doping amount on the synthesis of γ-Ce2S3, crystal structure, color performance, and temperature stability were systematically studied. The results show that the pigments exhibited a single cubic γ-Ce2S3 phase throughout the range of x increasing from 0 to 2.5. Compared with the co-precipitation method, the particle size of the pigment obtained by the low-temperature self-propagating combustion method decreased from 620 to 310 nm. Furthermore, as La3+ content increased, the band gap of the sample gradually increased from 2.06 to 2.90 eV, causing the color to change from red (L* = 39.42, a* = 40.35, b* = 30.28) to orange-red (L* = 49.15, a* = 35.51, b* = 40.64), then to orange-yellow (L* = 54.85, a* = 28.53, b* = 37.30), and finally to white-blue (L* = 66.66, a* = − 1.42, b* = 11.25). In addition, the thermal stability of γ-Na0.5Ce2.5 − xLaxS4 was evaluated by TG-DSC and its thermal stability increased from 350 to 480°C.

Abstract Image

低温自蔓延燃烧法合成 Na+-La3+ 共掺杂γ-Ce2S3 颜料及其性能研究
采用低温自蔓延燃烧法合成了 Na+-La3+ 共掺杂的γ-Ce2S3(简称γ-Na0.5Ce2.5 - xLaxS4)颜料,Na/(Ce1 - xLax)摩尔比固定为 0.2(x = 0、0.1、0.5、0.9、1.3、1.7、2.1 和 2.5)。以 CS2 为硫源,在 900℃ 下硫化 2 h,通过调节 La3+ 掺杂比例,得到了一系列不同颜色的 γ-Na0.5Ce2.5 - xLaxS4 颜料。系统研究了 La3+ 掺杂量对γ-Ce2S3的合成、晶体结构、颜色性能和温度稳定性的影响。结果表明,在 x 值从 0 增加到 2.5 的范围内,颜料都呈现出单一立方体的 γ-Ce2S3 相。与共沉淀法相比,低温自蔓延燃烧法得到的颜料粒径从 620 纳米减小到 310 纳米。此外,随着 La3+ 含量的增加,样品的带隙从 2.06 eV 逐渐增加到 2.90 eV,导致颜色从红色(L* = 39.42,a* = 40.35,b* = 30.28)变为橙红色(L* = 49.15,a* = 35.51,b* = 40.64),然后变为橙黄色(L* = 54.85,a* = 28.53,b* = 37.30),最后变为白蓝色(L* = 66.66,a* = - 1.42,b* = 11.25)。此外,还通过 TG-DSC 评估了 γ-Na0.5Ce2.5 - xLaxS4 的热稳定性,其热稳定性从 350°C 上升到 480°C。
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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research 工程技术-材料科学:膜
CiteScore
4.30
自引率
8.70%
发文量
130
审稿时长
2.5 months
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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