Preparation of transparent BaSO4 nanodispersions by high-gravity reactive precipitation combined with surface modification for transparent X-ray shielding nanocomposite films

Fang, Le; Sun, Qian; Duan, Yonghong; Zhai, Jing; Wang, Dan; Wang, Jie‐Xin

doi:10.1007/s11705-020-1985-y

Cited by 7 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although several synthetic means of MOFs have been reported toward the preparation of MOFs, they are fundamentally batch preparation with harsh conditions and large energy consumption, which cannot meet the prerequisites of industrialization . As a novel process intensification method, high gravity technology, which is usually performed in a rotating packed bed (RPB), can realize efficient molecular mixing and mass transfer, intensify the chemical reaction process, and fulfill the large-scale continuous production of materials (Figure a,b). − …”

Section: Resultsmentioning

confidence: 99%

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH₄/N₂ Separation

et al. 2023

Self Cite

View full text Add to dashboard Cite

Discovering optimum materials to realize an efficient CH 4 /N 2 mixture is of vital industrial significance but scientifically challenging. To solve this key obstacle, an efficient strategy from theoretical screening to scalable synthesis was thus proposed. A large-scale computational screening was first executed to identify high-performance adsorbents for CH 4 /N 2 separation from the experimental copper metal−organic framework (Cu-MOF) libraries. A series of MOFs with kagome-type lattice characteristics were computationally defined as candidates with good CH 4 /N 2 selectivity. As a proof-of-concept example, one of the candidates (SIWPAS) was further prepared in an experiment. Intriguingly, the pore sizes can be precisely regulated by altering the degassing temperature to induce the dynamic switch of the initial two-dimensional (2D) framework, further enhancing the separation performance for CH 4 /N 2 . The obtained selectivity of 15.0 at 298 K and 1.0 bar is consistent with the simulation prediction value, which is also one of the highest values presently. Meanwhile, the CH 4 /N 2 uptake ratio of 7.5 (298 K and 1.0 bar) and comprehensive separation performance index sorbent selection parameter (Ssp) of 283.0 are higher than those of all materials as yet. Significantly, the scalable continuous synthesis of this MOF was finally realized with the highest space-time yield (STY) of 18982 kg m −3 day −1 for all 2D MOFs with the aid of the process intensification approach based on high gravity technology. As a foremost finding, this work not only greatly shortens the discovery period of high-performance MOF materials but also effectively promotes their practical applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH₄/N₂ Separation

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…So far, various NPs with small and narrow size distributions have been successfully obtained via high-gravity technology. [48][49][50][51][52][53] Eminently, nano-CaCO 3 has realized industrial production. 54 Recently, our group has first succeeded in achieving the instantaneous and continuous synthesis of six ultrasmall MOFs NPs (<5 nm) using the external circulation rotating packed bed (ECRPB) reactor with an instantaneous residence of the reactants (<1 s) based on high-gravity technology.…”

Section: Introductionmentioning

confidence: 99%

“…Based on this, the high‐gravity technology is very beneficial to generate a high supersaturation degree and a rapid “burst nucleation” in the precipitation process to obtain NPs with small uniform sizes and shorten the reaction time. So far, various NPs with small and narrow size distributions have been successfully obtained via high‐gravity technology 48–53 . Eminently, nano‐CaCO 3 has realized industrial production 54 .…”

Section: Introductionmentioning

confidence: 99%

A universal strategy for efficient synthesis of Zr‐based MOF nanoparticles for enhanced water adsorption

et al. 2023

Self Cite

View full text Add to dashboard Cite

Zr‐based metal‐organic framework (Zr‐MOF) nanoparticles (NPs) have attracted extensive research thanks to their outstanding thermal and chemical stability, but their efficient synthesis is still challenging. Here, high‐quality Zr‐MOF NPs with tunable and uniform particle sizes can be successfully fabricated within 30 min by high‐gravity technology with high yields. Significantly, the rapidly milder preparation of UiO‐66 NPs can also be achieved at 90 or 70°C. This strategy has been extended to the synthesis of other Zr‐MOF NPs. Furthermore, the water vapor adsorption properties of obtained UiO‐66 NPs display a size‐dependent effect. The 70 nm UiO‐66 NPs have the highest adsorption capacity of 625 mg g−1 among unmodified UiO‐66 reported so far, and manifest 2.0–2.8 times faster water adsorption rate than the micron ones. This study provides a feasible method for the efficient and mild preparation of MOFs nanoparticles, which may promote the synthesis and applications of nano‐sized MOFs.

show abstract

“…In addition, the complex crystal structure and proper bonding strength of BaSO 4 allow for the presence of a large number of central optical phonon modes in the infrared active region in the Reststrahen band, which results in a higher emissivity in the sky window compared with other inorganic particles . Conventional BaSO 4 nanopowders are easy to agglomerate, which may heavily affect the radiative cooling effect and the mechanical properties of inorganic composites. ,− Therefore, the dispersibility of nanoparticles is crucial to improve the performance of composites. Nanodispersions are nanoparticles that can be uniformly dispersed in liquid media and remain stable over time.…”

Section: Introductionmentioning

confidence: 99%

BaSO₄-Epoxy Resin Composite Film for Efficient Daytime Radiative Cooling

Wu,

Zou,

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

Conventional cooling methods are based on active cooling technology by air conditioning, which consumes a large amount of energy and emits greenhouse gases. Radiative cooling is a novel promising passive cooling technology that uses external space as the cooling source and requires no additional energy consumption. Herein, we propose an approach to prepare highly dispersed BaSO4 nanoparticles (NPs) using a direct precipitation method combined with the in situ surface modification technology. The as-prepared PVP-modified BaSO4 NPs with an average size of 20 nm can be stably dispersed in ethanol for more than 6 months and then were used as building blocks to prepare spherical BaSO4 clusters with an average size of 0.9 μm using a scalable spray drying technique. The BaSO4 NPs/clusters (mass ratio 1:1) were used for preparing radiative cooling epoxy resin film, showing a high solar reflectance of 71% and a high sky window emissivity of 0.94. More importantly, this composite film displays superior radiative cooling performance, which can reduce the ambient temperature by 13.5 °C for the indoor test and 7 °C for the outdoor test. Compared with the commercial BaSO4 filled film, our BaSO4-epoxy resin composite film offers advantages not only in radiative cooling but also in mechanical properties with a 16.6% increase of tensile strength and 40.1% increase of elongation at break, demonstrating its great application potential in the field of building air conditioning.

show abstract

Preparation of transparent BaSO4 nanodispersions by high-gravity reactive precipitation combined with surface modification for transparent X-ray shielding nanocomposite films

Cited by 7 publications

References 50 publications

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH₄/N₂ Separation

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH₄/N₂ Separation

A universal strategy for efficient synthesis of Zr‐based MOF nanoparticles for enhanced water adsorption

BaSO₄-Epoxy Resin Composite Film for Efficient Daytime Radiative Cooling

Contact Info

Product

Resources

About

Preparation of transparent BaSO4 nanodispersions by high-gravity reactive precipitation combined with surface modification for transparent X-ray shielding nanocomposite films

Cited by 7 publications

References 50 publications

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH4/N2 Separation

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH4/N2 Separation

A universal strategy for efficient synthesis of Zr‐based MOF nanoparticles for enhanced water adsorption

BaSO4-Epoxy Resin Composite Film for Efficient Daytime Radiative Cooling

Contact Info

Product

Resources

About

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH₄/N₂ Separation

Discovery of a Scalable Metal–Organic Framework with a Switchable Structure for Efficient CH₄/N₂ Separation

BaSO₄-Epoxy Resin Composite Film for Efficient Daytime Radiative Cooling