CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiahao Lu,Ruiying Zhai,Yijie Yang,Sisi Chen,Xiaoqi Sun
Herein, a series of environmentally friendly rare earth doped yellow pigments with near-infrared (NIR) properties were synthesized using solid-state reaction at a high temperature of 1200 °C, with the general formula Y 2−x Bi x MoO 6 . The prepared pigments were characterized using analytical techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), CIE 1976 color space system, ultraviolet–visible/near infrared (UV–Vis/NIR) spectroscopy. Results indicated that its color changes from white to yellow after doping with Bi 2 O 3 in Y 2 MoO 6 . As the doping amount of Bi increased, the yellow color gradually deepened. All the doped samples exhibited a monoclinic structure with space group C 2/ c (15). When the optimal doping ratio was Y 1.8 Bi 0.2 MoO 6 (i.e., x = 0.2), the NIR reflectance (R%) and NIR solar reflectance (R∗%) of the pigment sample both exceeded 100 %. In the study of acid and alkali resistance, the color difference value ΔE∗ before and after pigment soaking was less than 5, indicating good chemical stability. In the coating study, the temperature difference between the air inside the pigment-coated house model and the air inside the uncoated house model reached 7 °C after 20 min of irradiation using an infrared lamp, suggesting that the prepared pigment reflects solar thermal radiation well and demonstrates good thermal insulation performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
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2024
·
IF 7.6
Huiting Liu,Shuangshuang Zhang,Xiaolei Qu,Heyun Fu,Linzi Zuo
The photo-dissolution of lead chromate pigments poses specific environmental hazards. In this study, we report that doping molybdenum in lead chromate pigments, resulting in commonly known molybdate red pigment, increases the risk of heavy metal leaching when exposed to light. Commercial molybdate red pigments undergo photo-dissolution when exposed to simulated sunlight and exhibit lower photostability compared to lead chromate pigments such as chrome yellow. After 24 h of irradiation, the leaching rates of toxic lead and chromium from molybdate red pigments were 2.98 and 3.70 times higher, respectively, than those from chrome yellow pigments. The primary factor leading to decreased pigment photostability is the activation of pigment semiconductors facilitated by molybdenum doping. Molybdate red pigments exhibit a broader light absorption spectrum and more efficient separation and transfer of photogenerated charge carriers than chrome yellow pigments, boosting the photochemical activity. To the best of our knowledge, this is the first study to illustrate the doping effect on the photostability of commercial inorganic pigments and the consequent heavy metal leaching. Our results suggest that Mo doping reduces the photostability of lead chromate pigments, highlighting the potential elevated environmental risks associated with complex inorganic pigments.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yijie Yang,Meiqi Zhang,Luo Feng,Bin Huang,Ruiying Zhai,Xiaoqi Sun
In order to alleviate the ecological pressure caused by rare earth tailings, this study focuses on the application of ion-adsorbed rare earth tailings in the preparation of functional pigments. By using mechanical grinding and high-temperature calcination , 33 new functionalized red pigments were successfully prepared by doping iron and lanthanum elements. X-ray diffraction (XRD), scanning electron microscopy (SEM), CIE 1976 color space system, and ultraviolet–visible–near-infrared spectrophotometer were used for characterization. The synthesized pigment exhibits a rich color range from light yellow to reddish brown. Compared with commercially available iron red pigments, it exhibits significantly enhanced near-infrared reflectance, excellent acid and alkali resistance, and strong thermal stability up to 900 °C. It is worth noting that pigment P-1-2-1 achieved the best red value (L* = 43.73, a* = +24.07, b* = +15.65) with a maximum near-infrared reflectance of 91 %. Therefore, the utilization of rare earth tailings as raw materials for the preparation of functional pigments has significant effects. This study provides valuable insights for the development of eco-friendly pigments, which not only helps alleviate the urban heat island effect but also promotes the sustainable utilization of rare earth tailing resources, contributing to the achievement of carbon neutrality goals.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 19
·6404
·
IF 3.4
Gele Teri,Kezhu Han,Dan Huang,Yanli Li,Yuxiao Tian,Xiaolian Chao,Zhihui Jia,Peng Fu,Yuhu Li
Situated in the village of Lama Temple on the eastern bank of the Wulie River in Chengde, Puren Temple stands as one of the few remaining royal temples of great importance from the Kangxi era (1662–1722 AD). This ancient edifice has greatly contributed to the advancement of our comprehension regarding the art of royal temple painting. The present study undertakes a comprehensive analysis and identification of nine samples obtained from the beams and ceiling paintings within the main hall of Puren Temple. Furthermore, a systematic examination of their mineral pigments and adhesives is conducted. The findings from polarized light microscopy (PLM), energy-type X-ray fluorescence spectrometer (ED-XRF), micro-Raman spectroscopy (m-RS), and X-ray diffractometer (XRD) analyses reveal that the pigments present in the main hall beams of Puren Temple are cinnabar, lead white, lapis lazuli, and lime green, while the pigments in the ceiling paintings consist of cinnabar, staghorn, lead white, lapis lazuli, and lime green. The use of animal glue as a binder for these pigments on both the main hall beams and ceiling paintings is confirmed via pyrolysis-gas chromatography–mass spectrometry (Py-Gc/Ms) results. These findings hold significant implications for the future restoration of Puren Temple, as they provide valuable guidance for the selection of appropriate restoration materials.Keywords:pigment analyses;building conservation;adhesive
研究领域:
文物保护
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
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2025
·
IF 2.5
Wang Yake
Lead chrome yellow is the most widely used yellow pigment, but it contains heavy metals lead and chromium to easily darken under sunlight. To avoid negative impacts, here, Ce x Bi 1-x VO 4 ( x = 0, 0.05, 0.1, 0.15 and 0.2, respectively) pigments were prepared using liquid phase precipitation method from ammonium metavanadate (NH 4 VO 3 ), bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and cerium nitrate hexahydrate (Ce(NO 3 ) 2 ·6H 2 O). Silica nanoparticles were used for strong weather resistance. The bright yellow Ce x Bi 1-x VO 4 @SiO 2 core–shell structured composite pigments were prepared. All Ce x Bi 1-x VO 4 samples are single phase without impurities. The bright yellow Ce 0.15 Bi 0.85 VO 4 @SiO 2 composite pigment exhibits yellowness ( b * = 89.73) better than the response value of BiVO 4 pigment ( b * = 82.72). The BiVO 4 @SiO 2 pigment shows the traits of L * = 86.06, a * = − 0.81, b* = 82.54 and Δ E = 4.31. After 672 h of UV exposure, Ce 0.15 Bi 0.85 VO 4 @SiO 2 pigment exhibits the properties of L * = 84.99, a * = − 4.6, b * = 87.61 and Δ E = 2.14. The composite exhibits high stability and ultraviolet (UV) resistance in acid, alkali and organic solvent. After Ce 0.15 Bi 0.85 VO 4 @SiO 2 pigment was soaked in 3.5 wt% NaCl solution for 268 h, the substrate corrosion just occurred. This work provides an effective solution for preparing the advanced eco-friendly yellow pigments.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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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
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无机化学
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光学性能
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建筑节能
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可持续发展
✓ 已验证
产品关联
DOI
高影响因子
Matter
·
2025
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IF 17.5
Wanjie Bai,Haotian Li,Huijie Liu,Xianheng Wang,Zhipeng Gu,Ye Yang,Yiwen Li
Black color is the most typical feature of natural and synthetic melanins, which results from the complex packing and chemical disorder of the molecular structure within melanins. From nature and beyond nature, breaking through the black color boundary, expanding the scope of inherent functions, and establishing clearer structure-function relationship of melanin is necessary but hard due to the inherent chaos structure caused by random covalent coupling and supramolecular assembly. Herein, starting from melanin-inspired monomers, we chose and assembled typical organic acceptor molecules (TCNB/TCNQ) with melanin-inspired donor molecules to prepare a series of colorful melanin-inspired pigments through the co-crystallization strategy. The resulting colorful melanin-inspired pigments exhibited multiple colors and different rod-like morphologies compared with many melanin-like polymers. Particularly, green DHI/TCNQ powder presented excellent photothermal efficiency (∼69.8%) for antibacterial application. This work would provide new structure-function tailoring strategy toward the design of melanin-like polymers with highly ordered structures and desirable properties.
研究领域:
材料科学
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有机化学
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光热治疗
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高分子化学
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超分子化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 10
·1097
·
IF 2.935
Zhicheng Wang,Shuping Nie,Ru Xia,Yang Lv,Ming Cao,Ming Chen,Qiannian Dong,Lifen Su,Peng Chen,Bin Yang,Jibin Miao,Zhengzhi Zheng,Jiasheng Qian
Colorization for fabricating aluminum pigments has broad application prospects in recent years. In this study, yellow-colored aluminum pigments with the double-layer structure Al@SiO2@PFMV were prepared using a sol-gel method. A crosslinked copolymeric dye (PFMV) was firstly synthesized by radical polymerization using vinyl triethoxysilane (VTES) and a small molecular dye (FGMAC) as monomers. Then, colored aluminum pigments were prepared by hydrolysis and condensation of the copolymers on the surface of aluminum pigments. SEM, AFM, FTIR, and XPS were used to characterize the surface morphology and chemical structure of the colored aluminum pigments. It was found that the colored aluminum pigments have a heterogeneous and smooth surface layer. The anticorrosion results showed that the colored aluminum pigments had better chemical stability with significantly improving corrosion resistance compared to raw aluminum pigments and Al@SiO2with the single-layer coating. Chromatism analysis indicated that the lightness of Al@SiO2@PFMV pigments decreased slightly and the color changed from silver-gray to yellow.Keywords:aluminum pigments;crosslinked copolymeric dye;corrosion resistance
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Zhiwei Wang,Qiuying Wang,Qin Liu,Suwit Suthirakun,Wongsathorn Kaewraung,Peng Jiang,Hang Zhao,Xin Xin,M. A. Subramanian
Blue pigments and blue glazes play crucial roles in our daily life. Ongoing research into blue pigments aims at environmentally friendly compositions with a lower cost. In this work, Co-doped BaAl2Si2O8 pigments were synthesized by a solid-state method. The blue color of the pigments is due to the 4A2(4F) → 4T1(4P) transitions allowed by doped Co2+ in the tetrahedral coordination of the structure. The pigments exhibit excellent stability under both acidic and alkaline conditions. When combined with transparent glazes, BaAl2–xCoxSi2O8 demonstrates satisfied compatibility, resulting in blue glazes with a significant reduction in Co content compared with existing formulations. Furthermore, BaAl2–xCoxSi2O8 blue glazes possess a simple production route, commendable color performance, and cost-effectiveness.
研究领域:
材料科学
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无机化学
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环境科学
✓ 已验证
DOI
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Li Li,Guanzheng Zhuang,Peng Yuan
Sepiolite can form stable hybrid pigments by immobilizing organic dyes in its microporous structure. Previous investigations demonstrated that the micropores and coordinated water might be responsible for the exceptional color and stability of indigo-sepiolite hybrid pigments. This work reveals the roles of coordinated water in forming hybrid pigments by acid modification. Raw sepiolite was modified by nitric acid at different conditions before use. Then a series of indigo-sepiolite pigments were prepared by indigo and acid-modified sepiolite. Their microstructures were characterized and analyzed by X-ray diffraction, Fourier transform infrared, transmission electron microscopy , and N 2 adsorption-desorption. The color properties of hybrid pigments were evaluated by reflectance spectra and CIE color parameters. Investigations into the chemical stability of pigments were conducted using concentrated HNO 3 and dimethyl sulfoxide. In addition, the photostability of pigments exposed to simulated 30-year illumination in a typical museum was studied. Acid modification of sepiolite contributed to a larger specific surface area and pore volume. However, acid modification resulted in worse color properties and stability due to the removal of coordinated water bonded with octahedral Mg 2+ . These findings confirmed that coordinated water molecules were the key to stabilizing indigo-sepiolite hybrid pigments by forming hydrogen bonds .
研究领域:
材料科学
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化学
✓ 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
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材料科学
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光学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Sihan Yang,Xuyan Xue,Feng Jiang,Liang Dong,Qi Zhu,Xuejiao Wang,Ji-Guang Li
The emission wavelength of current near-infrared phosphors activated by Cr 3+ is generally smaller than 900 nm in near-infrared (NIR) I region, and it is extremely challenging and is of great practical significance to realize emission towards NIR-II region. In this study, a novel Cr 3+ excited KSrScSi 2 O 7 silicate broad-band phosphor was prepared using the traditional solid-state method. Cr 3+ resides in a weak crystal field in the KSrScSi 2 O 7 lattice and exhibits broad-band near-infrared emission at 984 nm, longer than those of most Cr 3+ activated phosphors, under 493 nm blue light excitation. This is due to the strong charge polarization caused by the unique local coordination environment of the silicate matrix, which leads to a reduction in the crystal field splitting energy of the [ScO 6 ] octahedron where Cr 3+ is located and the downward shift of the 4 T 2 energy level. The optimal doping concentration of Cr 3+ is found to be 2 mol%, and the quenching mechanism is dipole-dipole interaction. Compared to the phosphors with similar emission wavelengths ( λ em > 900 nm), KSrScSi 2 O 7 :Cr 3+ demonstrates outstanding advantages in various aspects of luminescent performance. The fabricated phosphor-converted light-emitting diode (pc-LED) is shown to have the potential for night vision and non-invasive imaging. Novel application of KSrScSi 2 O 7 : x Cr 3+ as stable green ceramic pigments is also explored. The KSrScSi 2 O 7 : x Cr 3+ powders show a bright yellowish green appearance, and the KSrScSi 2 O 7 :0.02Cr 3+ typical composition has chromaticity values of L* = 82.73, a* = –8.53, b* = 7.97. Remarkably, the glazing samples using KSrScSi 2 O 7 : x Cr 3+ as pigments well retain the bright color after 1200 °C sintering in different atmospheres. Therefore, multi-functional applications of KSrScSi 2 O 7 : x Cr 3+ for near-infrared spectroscopy and as ceramic pigments are achieved in this work.
研究领域:
材料科学
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光学
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陶瓷科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）