Synthesis of Ni‐Al layered double hydroxide via coprecipitation: Formation mechanism, synthesis intensification, and catalytic application

Li, Yingjiao; Xue, Lin‐Di; Zhang, Yi‐Dong; Zhang, Liang‐Liang; Chu, Guang‐Wen; Sun, Baochang; Chen, Jianfeng

doi:10.1002/aic.18006

Cited by 7 publications

(1 citation statement)

References 82 publications

(124 reference statements)

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“…24 Process intensification has been considered to be one of the most promising progress paths for developing more sustainable chemical processes. 25,26 High-gravity technology based on rotating packed bed (RPB) is typical process intensification technology with great potential for industrial applications due to its high mass-transfer efficiency, which has been applied in the preparation of nanoparticles, 27,28 polymers, 29,30 and emulsions. 31,32 It has also been preliminary demonstrated that a variety of rare-earth doped nanophosphors with more uniform doping can be obtained by introducing high-gravity at the premixing stage, such as Zn 2 GeO 4 :Mn 2+ nanophosphors, 33 CaMoO 4 :Yb 3+ /Er 3+ phosphors, 34 and NaYF 4 : Gd 3+ /Yb 3+ /Er 3+ nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Intensified synthetic approach for GdYAG:Ce phosphors with ultrahigh color rendering toward healthy lighting

Wang,

Liu

et al. 2023

AIChE Journal

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Process intensified synthetic approach for synthesizing gadolinium and cerium co‐doped yttrium aluminum garnet (GdYAG:Ce) phosphors in white light‐emitting diodes (wLED) is developed. By using a high‐gravity rotating packed bed (RPB) reactor for preparation of sol–gel precursors, the significantly enhanced molecular mixing allows precise control and tuning of dry gel with designed structure to obtain nanosized particles of GdYAG:Ce precursors, which are prone to low temperature quick sintering process and therefore reduce the energy consumption of the electric furnace 76% compared to solid phase method. By analyzing the effect of cycling times and high gravity levels of RPB reactor on sintering and crystallization, sintering condition for emission spectrum adjustable GdYAG:Ce phosphors is optimized. Prototype devices based on blue chips and GdYAG:Ce phosphors exhibit high color rendering index of 83.8 and low correlation color temperature of 5357 K that are beneficial for creating a healthy and comfortable lighting environment.

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Section: Introductionmentioning

confidence: 99%

Intensified synthetic approach for GdYAG:Ce phosphors with ultrahigh color rendering toward healthy lighting

Wang,

Liu

et al. 2023

AIChE Journal

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Bimetallic synergistic effect of Co and Fe for the highly efficient catalytic decomposition of ozone

Liu,

Zhu,

Wang

et al. 2024

AIChE Journal

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Ground‐level ozone pollution is a major concern for human health, ecosystems, and material degradation. This article presents a Co‐ and Fe‐based bimetallic layered double hydroxide (CoFe‐LDH) catalyst for ozone decomposition. The CoFe‐LDH catalyst exhibited 100% ozone decomposition efficiency over 24 h at a reaction rate of 35.3 μmol g−1 min−1. The synergetic effects between Co and Fe regulated the valence state, increased the number of Co vacancies, and increased the specific surface area and density of the hydroxyl groups on the surface. Moreover, the two metals facilitated different dissociation steps and the desorption step became exothermic after ozone enrichment on the surface, rendering every step concurrently spontaneous, which has not been observed in previously reported ozone decomposition catalysts. This study demonstrates the potential of LDHs for ozone pollution control and offers new insights into the design of synergistic bimetallic catalysts.

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Core‐Shell Zeolite with Confined Nickel Particles as Prominent Catalyst for the Hydrogenation of Maleic Anhydride

Wu,

Zhuang,

Yan

et al. 2024

ChemCatChem

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Transformation of maleic anhydride (MA) into succinic anhydride (SA) through the development of high‐performance catalysts is an appealing approach from a sustainable development perspective. Herein, a core‐shell catalyst with silicate‐1 supported and MCM‐41 encapsulated nickel was prepared, which exhibited extraordinarily high MA conversion (99.8%) and SA selectivity (99.9%). Detailed structural characterizations and catalytic evaluation demonstrated that the core‐shell catalyst derived from the liquid deposition method is a hierarchically porous material with tunable shell thicknesses, possessing strong interaction between Ni particles and the supports. Key to this success is the MCM‐41 shell that covered the defects such as silanol nests on the surface of the silicate‐1 zeolite, diminishing both the surface and intra‐particle diffusion barriers, thus the specially‐designed catalyst achieved high activity under rather mild conditions (100 °C, 3.0 MPa), which is 59% higher than the conventional silicate‐1 supported Ni catalyst. Furthermore, the mesoporous MCM‐41 shell plays a crucial role in minimizing the leaching and sintering of Ni particles, thereby bolstering catalytic stability. Overall, the research provides a new approach for the rational design to optimize the performance of hydrogenation catalysts and introduces a novel idea to enhance the activity and stability of Ni‐supported catalysts.

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Synthesis of Ni‐Al layered double hydroxide via coprecipitation: Formation mechanism, synthesis intensification, and catalytic application

Cited by 7 publications

References 82 publications

Intensified synthetic approach for GdYAG:Ce phosphors with ultrahigh color rendering toward healthy lighting

Intensified synthetic approach for GdYAG:Ce phosphors with ultrahigh color rendering toward healthy lighting

Bimetallic synergistic effect of Co and Fe for the highly efficient catalytic decomposition of ozone

Core‐Shell Zeolite with Confined Nickel Particles as Prominent Catalyst for the Hydrogenation of Maleic Anhydride

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