CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Wu,Ying Dai,Yijun Liu,Wen Chen,Xinmei Pei,Fanfeng Xie
Novel eco-friendly green pigments, Pr x Ca 2 -x Al 2 SiO 7 (0 < x ≤ 0.1) were synthesized via a solid-state method using Pr 6 O 11 as the coloring oxide and Ca 2 Al 2 SiO 7 as the base material. The results reveal that praseodymium (Pr) ions dissolved into the Ca 2 Al 2 SiO 7 lattice, with the green coloration primarily attributed to Pr 3+ in the lattice. The solid solution was influenced by both temperature and the amount of Pr 6 O 11 introduced. A bright green pigment with composition Pr x Ca 2 -x Al 2 SiO 7 ( x = 0.08) was obtained by maintaining the material at 1350°C for 1.5 h, yielding chromatic parameters L*: 78.29, a*: -18.37 and b*: 27.51. Pr 3+ , responsible for coloration, are retained in an octahedral coordination environment by substituting Ca 2+ in the Ca 2 Al 2 SiO 7 lattice, while Pr 4+ are converted to Pr 3+ when the temperature exceeds 1323K. The newly synthesized pigment is non-toxic, harmless, and exhibits remarkable thermal stability, its successful application to biscuit ceramics highlights its potential as a sustainable and eco-friendly pigment for the ceramics industry.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 6
·1406
·
IF 3.623
Chenglong Lv,Mei Zu,Dongjin Xie,Haifeng Cheng
The emulation of the reflectance of green leaf in the solar spectral band (300–2500 nm) has garnered increasing attention from researchers. Currently, various materials have been proposed and investigated as potential bionic leaves. However, the problems such as poor weather durability, heavy metal pollution, and complex preparation technology still persist. Herein, a bionic leaf is prepared from an ultramarine green pigment as the functional material, polyvinylidene fluoride (PVDF) as the film-forming material, and LiCl as the humidizer. To prepare the ultramarine green pigment, the sulfur anion is added into the β cage of the 4A zeolite. The mechanisms and properties were discussed based on X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, and spectroscopic methods. The results show that the as-fabricated bionic leaf based on the 4A zeolite-derived ultramarine green pigment was able to demonstrate a high spectral similarity coefficient of 0.91 with the green leaf. Furthermore, the spectral similarity coefficient was increased to 0.94 after being subjected to a simulated rainforest environment for 48 h, which indicated its high weather durability.Keywords:bionic leaf;green pigment;solar reflectance;4A zeolite;ultramarine green
研究领域:
材料科学
·
光谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Wenwu Zhou,Jianyong Ye,Sheng Zhuo,Danxia Yu,Ping Fang,Rong Peng,Yue Liu,Weifan Chen
The pigments with high near-infrared (NIR) reflectance hold great promise toward both fundamental types of researches and applications for the realization of comfortable indoor-temperature by mitigating urban heat island effect. However, the facile yet simple method for the NIR reflective pigments with bright color and non-toxic feature remains a huge challenge, limiting their practical application. Herein, we proposed a mild and universal method of solution combustion for constructing the non-toxic and NIR reflective yellow-green pigments of Al-doped Y 3 Fe 5 O 12 . The Y 3 Fe 4 AlO 12 pigment presented a high NIR reflectance of 87.66%, and an outstanding acid/alkali resistance. Moreover, the pigment had an impressive color performance (L* = 78.72, a* = − 4.05, b* = 40.04). Besides, the practical near-infrared reflection performance revealed that the transient surface temperature of the Y 3 Fe 4 AlO 12 pigment was 7.6 °C lower than that of the pigment with similar color on the market. This research supplied high NIR reflecting pigments of Y 3 Fe 5−x Al x O 12 as promising coatings for roofs and exterior walls of buildings, acting as a favorable solution for urban heat island effect.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-10
·
IF 3.9
Zhou Haoyan,Zu Mei,Tang Xinxuan,Chang Yuanxi,Li Shiquan,Yang Hongrui,Lv Chenglong,Cheng Haifeng
Molecular sieves were widely used in the chemical industry, which caused a large number of inactivated molecular sieves to be discarded, resulting in a serious waste of resources and environmental pollution. Recently, recycling of discarded molecular sieves (DMS) has become a research hotspot. This study proposes an economical method using DMS to prepare green pigments mimicking foliage spectrum. The synthesized products were subjected to characterization using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Ultraviolet-visible-diffuse reflectance spectroscopy (UV-Vis-DRS), and scanning electron microscopy (SEM). The analysis revealed that sulfur radicals can be effectively incorporated as chromophores within the β-cages that are formed during the recrystallization process of sodalite, these cages are highly conducive to accommodating the radicals, thereby providing a protective environment that shields them from external influences. By adjusting the mass ratio of Na 2 CO 3 /S, the visible reflectance spectrum of ultramarine pigments can be easily modified. In addition, camouflage coating based on ultramarine green can be used to simulate the spectral reflectance characteristics of green vegetation. The Spectral Angle Mapping (SAM) system was used to evaluate the simulation effect of the camouflage coating. At a threshold below 98.5%, the camouflage coating still be misidentified as leaves, this method can recycle massive solid waste resources and significantly reduce the preparation cost of imitation green vegetation camouflage pigments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Yuncheng Zhou,Peng Jiang,Honghong Lei,Yong Li,Wenbin Cao,Jianlei Kuang
BaAl 2-x Mn x O 4+y (0 ≤ x ≤ 0.10) showing intense turquoise to green colors were prepared by the sol-gel method from metal nitrides as precursors and followed by a thermal treatment at 900 °C. The X-ray diffraction of all of the as-synthesized samples are indexed with BaAl 2 O 4 stuffed tridymite structure. The oxidation state of Mn is confirmed to be +5 by X-ray photoelectron spectroscopy analysis. The colors of the samples are tuned to intense turquoise and green with the increase of Mn content . The optical properties are characterized by UV–Vis absorbance spectra and CIE L ∗ a ∗ b ∗ coordinates. The reason for the intense colors is due to the Mn 5+ doping in the [AlO 4 ] tetrahedral sites. The pigments are applied to poly(methyl methacrylate) (PMMA) and the colours of the polymer composite were characterized.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Feng Jiang,Junling Yu,Guo Feng,Junhua Chen,Tao Wang,Xiaojun Zhang,Quan Zhang,Rongchi Zhang,Qian Wu,Qing Hu,Yun Yu,Jianmin Liu
Novel stablized green Ni 0.15 Mg x Al 2(0.85- x ) Ti 1.15+ x O 5 (0 ≤ x ≤ 0.25) pigments were prepared by solid-state method using Ni 2 O 3 as colorant and Mg(CH 3 COO) 2 ‧4H 2 O as auxiliary stabilizer . The synthesised pigments were characterized via XRD , XPS , SEM, TEM, UV-Vis, and automatic colorimeters. The results show that Mg-doping increases the oxygen vacancies , resulting in a positive shift of the binding energy of Ni 2+ irons. The formation of Ni 0.15 Mg x Al 2(0.85- x ) Ti 1.15+ x O 5 solid solution greatly increases the energy transfer energy and shifts the emission to lower wavelengths (530 nm), corresponding to the visible diffuse reflection of green light. The chromaticity of the pigment changed little ( L* =72.51, a* =−18.16, b* =20.94) at 1200 ℃ for 10 h, showing excellent thermal stability. The properties especially excellent thermal stability makes it promising novel green pigments in ceramic industry application.
研究领域:
材料科学
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ruiying Zhai,Yijie Yang,Peilin Lei,Jiahao Lu,Sisi Chen,Xiaoqi Sun
In this article, a green pigment Bi 1.95-x Pr x W 0.05 MoO 6+δ (x = 0.1–0.5) co-doped with Pr and W was developed using high temperature solid-phase synthesis method. The microstructure, color performance, and optical characteristics of the novel pigment was analyzed using x-ray diffraction instrument (XRD), field-emission scanning electron microscopy (FESEM), L∗ a∗ b∗ color date, and ultraviolet–visible–near infrared light spectrophotometer. The results indicate that all the samples possess a monoclinic structure, characterized by the space group P21/c(14). Compared to Bi 2-x Pr x MoO 6+δ doped solely with Pr 6 O 11 , the Pr/W co-doped Bi 2 MoO 6 pigment demonstrates superior green coloration. The solar reflectance in the near-infrared region of all pigment samples exceeds 80 %, highest value reaches 92.82 %. In thermal insulation tests, the temperature difference between the Bi 1.95-x Pr x W 0.05 MoO 6+δ pigment coating and a blank galvanized sheet reaches up to 10.3 °C after 60 min under infrared lamp irradiation. The color difference Δ E∗ of the pigment powder after immersion in acid and alkali solution and high-temperature calcination are less than 5, indicating good chemical stabilities in acidic, alkaline and high-temperature environments. To our knowledge, Bi 1.95-x Pr x W 0.05 MoO 6+δ has the highest reflectivity among green pigments without toxic metals.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kai Lv,Xu Liang,Qinglin Yao,Liangmiao Zhang,Zongtao Zhang,Yanfeng Gao
This work reports a series of yellow-green near-infrared (NIR) reflective pigments, Ba(Mg 6-x-y Zn y Ti 6-x Cr 2x )O 19 (x = 0–1.0, y = 0–2.5), with strong NIR reflectivity for solar thermal energy regulation. Comprehensive analyses were carried out to characterize the obtained pigments including X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV–Vis–NIR spectrophotometry, and CIE L*a*b* color measurement. Absorption spectra of Ba(Mg 6-x Ti 6-x Cr 2x )O 19 showed that the yellow-green absorption is attributed to the octahedrally coordinated Cr 3+ with d-d electron transitions of 4 A 2 (F)→ 4 T 1 (F) and 4 A 2 (F)→ 4 T 2 (F). However, their broad absorption peak centered at 1200 nm severely deteriorated the insulating properties of the pigments. Through substituting Mg with Zn, the obtained pigment Ba(Mg 2.5 Zn 2.5 Ti 5 Cr 2 )O 19 showed an excellent NIR solar reflectance (R* = 67 %) with color performances (L* = 61.98, a* = −18.72, b* = 22.23). EnergyPlus simulation results show that for a warm city (Haikou), the Ba(Mg 2.5 Zn 2.5 Ti 5 Cr 2 )O 19 coating for the external surface of a model house (TSR = 35 %, R* = 55 %) can reduce annual cooling energy consumption by 8 % of the house.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Menghang Qi,Liangsheng Tian,Yutong Wang,Xin Xin,Hang Zhao,Theeranun Siritanon,M.A. Subramanian,Peng Jiang
To alleviate the urban heat island effect, reduce building energy consumption and improve the living environment for residents, the development of highly reflective pigments and coatings is of great significance for sustainable development. In this study, Mg 2.4- x Cr x TiO 4.4+δ (0.1 ≤ x ≤ 0.3) and Mg 2.4- x Co x TiO 4.4 (0.1 ≤ x ≤ 0.4) pigments with intense green/sky blue colors were successfully synthesized through solid state method. The crystal structure, color development mechanism and optical properties of as-synthesized samples are analyzed. The as-prepared pigments demonstrate excellent NIR reflectance with the highest solar reflectance up to 83%. Furthermore, the color coatings with high NIR solar reflectance were successfully prepared by mixing the pigments with acrylic resin. A solar reflectance of 69.81% is achieved among the green/blue coatings. The thermal shielding effect of the coatings in practical applications was tested through chamber simulation experiments. The test temperature of the prepared coating was 8.8 ℃ lower than that of the blank stainless steel plate after radiating with a 250 W infrared lamp for 30 minutes, which proved its good heat insulation performance. Through pickling and alkali washing experiments, the color coordinates of the coatings are very stable, indicating the excellent acid-base resistance in the practical applications.
研究领域:
材料科学
·
无机化学
·
光学性能
·
建筑节能
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Zhiwei Wang,Qiuying Wang,Yi Wang,Theeranun Siritanon,M.A. Subramanian,Peng Jiang
Mg 2.2- x Co x TiO 4 (0 ≤ x ≤ 0.6) and Mg 2.2- x Cr x TiO 4 (0 ≤ x ≤ 0.6) solid solutions with spinel structure were successfully synthesized by solid-phase reaction. Excess MgO was added to achieve the single phase of the compounds. The transition metal ions Co/Cr tune the colors of Mg 2 TiO 4 to intense blue and green, respectively. The root of the observed intense blue color of Mg 2.2- x Co x TiO 4 is attributed to the 4 A 2 (F) → 4 T 1 (P) transition of Co 2+ in tetrahedral coordination. In Cr doped Mg 2 TiO 4 , Cr exists in a mixed oxidation states of +3 and + 6. The green color of the as-synthesized Mg 2.2- x Cr x TiO 4 is attributed to 4 A 2 (F) → 4 T 1 (F) at 410 nm–500 nm and 4 A 2 (F) → 4 T 2 (F) at 610 nm transitions of Cr 3+ . Besides, the Cr 3+ - Ti 4+ charge-transfer transition at 410 nm–500 nm is also the reason why it shows green. The as-synthesized pigments were dispersed into PMMA to prepare blue/green plastics.
研究领域:
材料科学
·
无机化学
·
颜料技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Minhong Xu,Zijuan Yu,Xuebin Zhang,Bishen Zhao,Liangjie Qi,Guoxiang Pan
The development of environmentally friendly green pigments with high near-infrared reflection to replace traditional chrome green pigments is one of the key areas of pigment research. This paper proposes a composite green pigment FAT 4 Z 0.5 P 0.15 using heat-resistant iron oxide hydroxide (FA) and phthalocyanine blue (CuPc) as pigments, and constructing a TiO 2 and hydrotalcites interface layer to achieve a green tone comparable to Cr 2 O 3 while enhancing the near-infrared reflectivity. The XRD and SEM test results show that components belonging to TiO 2 , hydrotalcites and CuPc have formed on the surface of FA pigment, with their crystal structures and morphological characteristics, and a multi-layer heterogeneous composite structure has been formed. The XPS test results indicate that there are interactions between the interface layers formed by each component. After the coating treatment, the heat resistance of prepared pigment has improved. The near-infrared reflectance of FAT 4 Z 0.5 P 0.15 ( L∗= 56.88, a∗= -9.91, b∗= 1.61) reaches 70.28 %, which is much higher than that of Cr 2 O 3 pigment ( L∗ = 55.34, a∗= -6.65, b∗= 3.86) at 49 %. The results of radiant heat flow reduction performance test show that the heat flux of FAT 4 Z 0.5 P 0.15 -coating and FAT 4 N 0.5 P 0.15 -coating are 21.08 W/m 2 and 22.36 W/m 2 , respectively. The composite pigment coatings can significantly reduce the temperature inside a simulated house and are expected to be used as energy-saving pigments to reduce energy consumption.
研究领域:
材料科学
·
无机化学
·
功能材料
·
能源材料
·
表面工程
·
涂料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
X. Zhou,M.-H. Zhao,J. Yang,Y. Han,L. Cao,Y.-Y. Han,J. Wang,Y. Wang,M.-R. Li
Environment-friendly and cost-effective versatile yellow-green inorganic pigments are technically significant for natural camouflage but rare. Here, we adopt site-selective parent-doping of Mn–Li into the octahedral Ca-site (Ca B ) of Ca 3 TeO 6 to deliver vivid greenish pigments by the unprecedented yellow-green Mn 4+ O 6 chromophore, yielding tunable pigments resemble to seasonal leaves. The camouflage color zone of these pigments are remarkably enlarged by chemical pressure via Mg 2+ /Sr 2+ -substitution for the A -site Ca (Ca A ). The locally anisotropic and positive chemical pressure on chromophore group is scaled to be around +14.4/+23.3 GPa, as estimated from the accompanied geometric evolution of Mn 4+ O 6 . The achieved pigments also demonstrate excellent chemical and thermodynamic stability and high (60–80%) near infrared reflectivity in 1500–2500 nm, showing potential applications for natural camouflage and yellow-green “cool pigments”. These findings built a bridge between chemical and equivalently physical pressure, and nominated a way to estimate the overall and local strain/pressure by optical descriptor.
研究领域:
无机化学
·
材料科学
·
光学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）