Coprecipitation synthesis of a green Co-doped wurtzite structure high near-infrared reflective pigments using ammonia as precipitant

Zhou, Nianying; Sha, Shuai; Zhang, Yin; Li, Sha; Xu, Shuqiang; Luan, Jiapan

doi:10.1016/j.jallcom.2019.153183

Cited by 16 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For this purpose, the careful selection of nanoparticles and pigments was developed to optimize the thermal and optical performances of materials, such as radiative cooling painting. Several works were led in this sense to develop high-reflective paints known as "cool paints", such as smart coatings with high NIR reflectance to reduce the solar heat gain and the energy consumption [56][57][58][59]. In addition, the coatings were developed in order to achieve the color and efficient radiative cooling requirements in a simple, low-cost, and scalable way [60].…”

Section: Science Mapping and Visualizationmentioning

confidence: 99%

Cool Surface Strategies with an Emphasis on the Materials Dimension: A Review

et al. 2022

View full text Add to dashboard Cite

The need to tackle the urban heat island effect demands the implementation of cool surfaces as a mitigation strategy. This study comprehensively reviews the evolution of this research field from a materials perspective. It provides a bibliometric analysis of the relevant literature using the SciMAT software processing of bibliographic records from 1995 to 2020, for the evolution of cool surfaces. The results obtained show an increased interest in the field from 2011 to 2020, particularly for roof applications, and present the scientific evolution of reflective materials. According to the materials dimension adopted by the development of the research field, the study is refined from a bibliometric analysis of 982 selected records for the analysis of five themes: (i) Pigments; (ii) Phase change materials; (iii) Retroreflective materials; (iv) Ceramic materials; and (v) Glass. These materials present promising results in terms of their solar reflectance performances in the mitigation of the urban heat island phenomenon. At the end of this review, recommendations for future studies are provided for the creation of economic and environmentally friendly materials based on waste glass recycling. This study represents a valuable contribution that provides a scientific background with regard to cool surfaces from a materials perspective for future investigations.

show abstract

Section: Science Mapping and Visualizationmentioning

confidence: 99%

Cool Surface Strategies with an Emphasis on the Materials Dimension: A Review

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In recent years, near-infrared (NIR) reflective pigments have received considerable attention in construction, plastic, ink, and military industries. NIR reflective pigments are complex metal oxides with high reflectance for NIR radiation (Song et al, 2019;Ali et al, 2018;Rossi et al, 2020;Jing et al, 2018;Zhou et al, 2020). The everyday use of solar reflective roofing materials has been proven to save energy, alleviate urban heat islands, and curb global warming (Ferrari et al, 2015;Zou and Zhang, 2020;Yang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Mg2+ and Al3+ Co-Doped CoCr2O4 Inorganic Pigments With High Near-Infrared Reflectance

et al. 2022

View full text Add to dashboard Cite

A new class of near-infrared (NIR) reflectance pigments based on Co1−xMgxCr2−yAlyO4 (x = 0–1 and y = 0–2) was synthesised using the Pechini-type sol-gel process. The developed powders were characterised by thermogravimetry and differential scanning calorimetry, X-ray diffraction (XRD), ultraviolet–visible near-infrared diffuse reflectance spectroscopy, and colour Commission Internationale del'Eclairage (CIE) 1976 (L*a*b*) colour scales. The XRD patterns revealed characteristic peaks of the spinel structure with good crystallinity. Substituting Mg2+ for Co2+ ions in the tetrahedral positions and Al3+ for Cr3+ ions in the octahedral positions of CoCr2O4 reduces the cost and changes the colour of the pigment (green to yellow and then blue). Moreover, the synthesised pigments exhibited high NIR solar reflectance in the 780–2,500 nm wavelength range. The thermal and chemical stability of the pigments was also studied. Our findings demonstrate the potential for applying these pigments in cool colourants.

show abstract

“…With the rapid development of economy, a large number of people have migrated from rural areas to metropolises, resulting in a surge in population and buildings. − Furthermore, the exterior walls and roofs of buildings absorb solar radiation and the surface temperature rises, so the temperature in the city center will be higher than that in the suburbs, which easily causes a heat island effect in the city. , The heat island effect not only brings discomfort to people but also increases the energy consumption of air conditioning in summer . Therefore, different technologies have been adopted to alleviate the “heat island effect.” Among them, the simplest and most effective method is to apply cool coatings on the exterior walls and roofs of buildings to reduce the surface temperature. , …”

Section: Introductionmentioning

confidence: 99%

“…Among them, the simplest and most effective method is to apply cool coatings on the exterior walls and roofs of buildings to reduce the surface temperature. 6,7 It is well known that 5% of the solar radiation is distributed in the ultraviolet region (UV, 200−400 nm), 43% in the visible region (vis, 400−700 nm), and 52% in the near-infrared (NIR) region (700−2500 nm). 8−11 In view of this, the heat island effect can be effectively alleviated by the development of a pigment with high NIR reflectance and applying it to the cool coatings.…”

Section: ■ Introductionmentioning

confidence: 99%

High Near-Infrared Reflectance Orange Pigments of Fe-Doped La₂W₂O₉: Preparation, Characterization, and Energy Consumption Simulation

Zhou

Liu

Sun

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

A new series of orange highly near-infrared reflective pigments based on Fe-doped La 2 W 2 O 9 were effectively fabricated via solution combustion synthesis. The acquired pigment powders were characterized by powder X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Xray photoelectron spectroscopy, ultraviolet−visible−near-infrared spectrophotometry, and CIE 1976 L*a*b* color scales. Then, the energy consumption of the air-conditioning system was simulated based on EnergyPlus software. The results showed that the doping of Fe 3+ ions will change the color of the pigment from white to orange. Meanwhile, the band gaps of La 2 W 1.85 Fe 0.15 O 9-δ and La 2 W 1.8 Fe 0.2 O 9-δ shifted from 3.71 to 3.07 eV and 2.96 eV, respectively. The typical La 2 W 1.85 Fe 0.15 O 9-δ pigment powders showed the highest near-infrared reflectance of 89.25% between 700 and 2500 nm and impressive color (L* = 74.20, a* = 22.69, and c* = 22.42). The simulation results illustrated that the homeowner could save $7.32 per month by coating the walls and roofs of the building with the energy-saving paint composed of La 2 W 1.8 Fe 0.2 O 9-δ . Excellent chemical stability and high near-infrared reflectance made the synthesized pigments a potential candidate for energy-saving coatings.

show abstract

Coprecipitation synthesis of a green Co-doped wurtzite structure high near-infrared reflective pigments using ammonia as precipitant

Cited by 16 publications

References 33 publications

Cool Surface Strategies with an Emphasis on the Materials Dimension: A Review

Cool Surface Strategies with an Emphasis on the Materials Dimension: A Review

Synthesis and Characterisation of Mg2+ and Al3+ Co-Doped CoCr2O4 Inorganic Pigments With High Near-Infrared Reflectance

High Near-Infrared Reflectance Orange Pigments of Fe-Doped La₂W₂O₉: Preparation, Characterization, and Energy Consumption Simulation

Contact Info

Product

Resources

About

Coprecipitation synthesis of a green Co-doped wurtzite structure high near-infrared reflective pigments using ammonia as precipitant

Cited by 16 publications

References 33 publications

Cool Surface Strategies with an Emphasis on the Materials Dimension: A Review

Cool Surface Strategies with an Emphasis on the Materials Dimension: A Review

Synthesis and Characterisation of Mg2+ and Al3+ Co-Doped CoCr2O4 Inorganic Pigments With High Near-Infrared Reflectance

High Near-Infrared Reflectance Orange Pigments of Fe-Doped La2W2O9: Preparation, Characterization, and Energy Consumption Simulation

Contact Info

Product

Resources

About

High Near-Infrared Reflectance Orange Pigments of Fe-Doped La₂W₂O₉: Preparation, Characterization, and Energy Consumption Simulation