An efficient biochar adsorbent for CO2 capture: Combined experimental and theoretical study on the promotion mechanism of N-doping

Li, Hongxian; Tang, Minghui; Huang, Xinlei; Liu, Qi; Lu, Shengyong

doi:10.1016/j.cej.2023.143095

Cited by 7 publications

(2 citation statements)

References 52 publications

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“…Other examples include cerium oxide nanorods coated with nitrogen-doped carbon nanoparticles, nickel oxide nanoparticles,-doped PVA-MF polymer nanocomposites, zincdoped SnS 2 nanoparticles, a metal-organic framework with the iron base loaded on iron oxide nanoparticles, nitrogen-doped biochar, and iron-doped natural clay. These materials showcased noteworthy enhancements in their adsorption capacities and efficiency for various applications [116][117][118][119][120][121][122]. The improvement of the performance of doped adsorbents over the undoped ones is demonstrated in Figure 8 for various applications.…”

Section: Applications Of Doped Photocatalysts and Adsorbentsmentioning

confidence: 98%

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Sen,

Bhattacharya,

Mukherjee

et al. 2023

Technologies

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Environmental pollution poses a pressing global challenge, demanding innovative solutions for effective pollutant removal.. Photocatalysts, particularly titanium dioxide (TiO2), are renowned for their catalytic prowess; however, they often require ultraviolet light for activation. Researchers had turned to doping with metals and non-metals to extend their utility into the visible spectrum. While this approach shows promise, it also presents challenges such as material stability and dopant leaching. Co-doping, involving both metals and non-metals, has emerged as a viable strategy to mitigate these limitations. Inthe fieldof adsorbents, carbon-based materials doped with nitrogen are gaining attention for their improved adsorption capabilities and CO2/N2 selectivity. Nitrogen doping enhances surface area and fosters interactions between acidic CO2 molecules and basic nitrogen functionalities. The optimal combination of an ultramicroporous surface area and specific nitrogen functional groups is key to achievehigh CO2 uptake values and selectivity. The integration of photocatalysis and adsorption processes in doped materials has shown synergistic pollutant removal efficiency. Various synthesis methods, including sol–gel, co-precipitation, and hydrothermal approaches had been employed to create hybrid units of doped photocatalysts and adsorbents. While progress has been made in enhancing the performance of doped materials at the laboratory scale, challenges persist in transitioning these technologies to large-scale industrial applications. Rigorous studies are needed to investigate the impact of doping on material structure and stability, optimize process parameters, and assess performance in real-world industrial reactors. These advancements are promising foraddressing environmental pollution challenges, promoting sustainability, and paving the way for a cleaner and healthier future. This manuscript provides a comprehensive overview of recent developments in doping strategies for photocatalysts and adsorbents, offering insights into the potential of these materials to revolutionize environmental remediation technologies.

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Section: Applications Of Doped Photocatalysts and Adsorbentsmentioning

confidence: 98%

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Sen,

Bhattacharya,

Mukherjee

et al. 2023

Technologies

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show abstract

“…The escalating technology readiness level (TRL) of thermochemical conversion routes has significantly contributed to the increasing interest in biochar, primarily for its remarkable versatility across various applications [5]. The multifaceted potential of biochar in different domains underscores its significance in contemporary studies, and ongoing research continues to unveil more opportunities for its sustainable and effective utilization in various applications (soil amendment [6][7][8], biofuel [9][10][11], adsorbent material [12][13][14] and wastewater treatment [15][16][17]) and as a support for functionalized materials applicable in chemical synthesis.…”

Section: Introductionmentioning

confidence: 99%

Biochar from Lignocellulosic Biomass: The Importance of Physicochemical Characterization and Multi-Criteria Decision Analysis for Its Applications

Evaristo,

Dutra,

Suarez

et al. 2024

Preprint

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Biochar is a carbonaceous material derived from the thermochemical conversion of biomass under oxygen-lean conditions. Its properties render it many applications in agriculture, environmental remediation, and catalysis. Commonly produced by pyrolysis under a nitrogen atmosphere, the biochar composition is influenced mainly by residence time, heating rate, and process temperature. The existing literature primarily assesses biochar properties, such as ultimate, proximate, calorific, porosity, and combustibility, generated under various thermo-conversion conditions. However, there is a notable lack of sufficient investigation and attention given to the practical application of biochar. This article seeks to bridge that gap by enhancing the comprehension of the necessary experimental assessment for specific biochar applications and proposing process optimization methods using Multi-Criteria Decision Analysis (MCDA). By delving into these aspects, the study offers a concise overview of biochar production and presents a comprehensive panorama based on articles and patents. Additionally, the research explores the physicochemical characterization techniques associated with biochar and its various applications in conjunction with MCDA. This comprehensive approach aims to uncover valuable insights that could further advance the practical and sustainable utilization of biochar in a wide range of fields.

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Molecular Imprinting as a Tool for Exceptionally Selective Gas Separation in Nanoporous Polymers

Park,

Jung,

Elashery

et al. 2024

Chemistry An Asian Journal

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The alarming increase in atmospheric CO2 levels, driven by fossil fuel combustion and industrial processes, is a major contributor to climate change. Effective technologies for selective CO2 removal are urgently needed, especially for industrial gas streams like flue gas and biogas, which contain impurities such as N2 and CH4. In this study, we designed and synthesized molecularly imprinted polymers (MIPs) using 4‐vinylpyridine(4VP) and methacrylic acid(MAA) as functional monomers, and thiophene(Th) and formaldehyde(HC) as molecular templates. The MIPs were engineered to create selective molecular cavities within a nanoporous polymer matrix for efficient CO2 capture. By adjusting the molar ratios of the template to the functional monomers, we optimized the imprinting process to enhance CO2 selectivity over N2&CH4. The resulting MIPs exhibited excellent performance, achieving a maximum CO2/N2 selectivity of 153 at 25 bar and CO2/CH4 selectivity of 25.3 at 1 bar, significantly surpassing previously reported porous polymers and metal‐organic frameworks(MOFs) under similar conditions. Heat of adsorption studies confirmed the strong and selective interaction of CO2 with the imprinted cavities, demonstrating the superior adsorption properties of the synthesized MIPs. This study highlights the potential of molecular imprinting for improving CO2 capture capacity and selectivity, offering a scalable solution for industrial CO2 separation.

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An efficient biochar adsorbent for CO2 capture: Combined experimental and theoretical study on the promotion mechanism of N-doping

Cited by 7 publications

References 52 publications

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Advancements in Doping Strategies for Enhanced Photocatalysts and Adsorbents in Environmental Remediation

Biochar from Lignocellulosic Biomass: The Importance of Physicochemical Characterization and Multi-Criteria Decision Analysis for Its Applications

Molecular Imprinting as a Tool for Exceptionally Selective Gas Separation in Nanoporous Polymers

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