Polyethyleneimine-modified layered double hydroxide/SBA-15 composites: A novel kind of highly efficient CO2 adsorbents

Wu, Kai; Ye, Qing; Wang, Lanyang; Meng, Fanwei; Dai, Hongxing

doi:10.1016/j.clay.2022.106660

Cited by 11 publications

(1 citation statement)

References 44 publications

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“…Among them, research on silica materials with excellent cost-effective performance has rapidly increased [ 25 , 26 , 27 ]. In particular, mesoporous silica, conventionally well-known silica such as MCM-41, MCM-48, and SBA-15, and other silicas with unique structures have been studied and used as substrates for a long time [ 28 , 29 , 30 , 31 ]. These conventional silicas usually show outstanding surface area and highly ordered pores but a low pore volume.…”

Section: Introductionmentioning

confidence: 99%

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

Lee,

Kang,

Kim

et al. 2023

Micromachines

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To adsorb and remove formaldehyde, which is a harmful volatile organic chemical (VOC) detected indoors, an alkylamine was introduced into the substrate as a formaldehyde adsorbent. In this study, Tetraethylenepentaamine (TEPA) was introduced into the mesoporous silica using the amine impregnation method. Since the impregnated alkylamine can block the pores of the silica substrate, the pore size and pore volume are very important factors for its use as a substrate for an adsorbent. Focusing on the substrate’s pore properties, Santa Barbara Amorphous-15 (SBA-15) was chosen as a conventional one-dimensional pore-structured mesoporous silica, and dendritic mesoporous silica (DMS) as a three-dimensional pore-structured mesoporous silica. To 1 g each of silica substrate DMS and SBA-15, 0, 0.5, 1.5, and 2.5 g of TEPA were introduced. A fixed concentration and amount of formaldehyde gas was flowed through the adsorbent and then the adsorbent was changed to the 2,4-Dinitrophenylhydrazine (2,4-DNPH) cartridge to adsorb the remaining formaldehyde. According to the methods recommended by the World Health Organization (WHO) and National Institute for Occupational Safety & Health (NIOSH), the formaldehyde captured by 2,4-DNPH was analyzed using high-performance liquid chromatography (HPLC). A comparison of DMS and SBA-15 in the amine impregnation method shows that not only surface area, but also large pore size and high pore volume, contribute to the formaldehyde adsorption ability.

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Section: Introductionmentioning

confidence: 99%

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

Lee,

Kang,

Kim

et al. 2023

Micromachines

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Preparation of MgAl‐LDH/halloysite composite materials for efficient CO₂ adsorption

Liu,

Zhou,

Gong

et al. 2024

J of Chemical Tech & Biotech

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BackgroundCO2 emissions have had negative impacts on various aspects of life and the environment, making the development of materials with high CO2 adsorption performance crucial.ResultIn this study, halloysite nanotubes (HNTs) were used as a carrier to prepare MgAl layered double hydroxide (LDH) via a convenient coprecipitation method, resulting in MgAl‐LDH/HNT composite material, which was then evaluated for its CO2 adsorption performance. The physicochemical properties of the composite material were characterized using various methods. Results showed that the 1:1 ratio MgAl‐LDH/HNT composite exhibited superior material structure, with a specific surface area reaching 178.24 m2 g−1. In CO2 adsorption performance tests, the 1:1 MgAl‐LDH/HNT composite showed the best adsorption performance, with a CO2 adsorption capacity of 3.91 mmol g−1. This adsorption process includes physical adsorption and chemical adsorption. Kinetic analysis results indicate that the adsorption process is mainly dominated by physical adsorption. The material also demonstrated good performance in cyclic stability tests, maintaining a regeneration efficiency of over 94% after six cycles.ConclusionThe MgAl‐LDH/HNT material has good properties and stability. This provides an effective pathway and direction for the development of new adsorbents with higher CO2 adsorption performance. © 2024 Society of Chemical Industry (SCI).

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Preparation of Hydrotalcite/SBA-15 Composite Catalyst and its Application in the Synthesis of ε-Caprolactone

Wang,

Zheng,

Lang

2024

Catal Lett

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Polyethyleneimine-modified layered double hydroxide/SBA-15 composites: A novel kind of highly efficient CO2 adsorbents

Cited by 11 publications

References 44 publications

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

Preparation of MgAl‐LDH/halloysite composite materials for efficient CO₂ adsorption

Preparation of Hydrotalcite/SBA-15 Composite Catalyst and its Application in the Synthesis of ε-Caprolactone

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Polyethyleneimine-modified layered double hydroxide/SBA-15 composites: A novel kind of highly efficient CO2 adsorbents

Cited by 11 publications

References 44 publications

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

Amine-Impregnated Dendritic Mesoporous Silica for the Adsorption of Formaldehyde

Preparation of MgAl‐LDH/halloysite composite materials for efficient CO2 adsorption

Preparation of Hydrotalcite/SBA-15 Composite Catalyst and its Application in the Synthesis of ε-Caprolactone

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Preparation of MgAl‐LDH/halloysite composite materials for efficient CO₂ adsorption