Heteroatom-doped biochar for CO2 adsorption: a review of heteroatoms, doping methods, and functions

文献类型： 外文期刊

第一作者： Sun, Yuxuan

作者： Sun, Yuxuan;Jia, Jixiu;Liu, Zhidan;Sun, Yuxuan;Jia, Jixiu;Huo, Lili;Zhao, Lixin;Yao, Zonglu

作者机构：

关键词： Heteroatom doping; Biochar; CO2 adsorption; Doping method

期刊名称：BIOMASS CONVERSION AND BIOREFINERY （ 影响因子：4.0； 五年影响因子：4.1 ）

ISSN： 2190-6815

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Choosing special materials to achieve good adsorption and capture of CO2 is an essential technique for solving the problem of global warming. Biochar is an ideal precursor CO2 adsorbent due to its renewability, stability, and useful physicochemical properties. Furthermore, heteroatom doping can significantly improve the characteristics of biochar, such as enrich heteroatom functional groups and regulate carbon skeleton. This study reviews existing heteroatom doping methods and summarizes the current understanding of the influence of heteroatoms on CO2 adsorption of biochar. Specifically, compared with different doping methods, pre-decoration doping has higher doping efficiency and creates more abundant surface functional groups than post-decoration doping. Considering multi-element co-doping can combine the special functions of each element, application advantages and potential problems of co-doping are analyzed. In addition, the study further revealed that difficulty level with heteroatom doping mainly depend on the atomic structure of the doping element. The further improvement of chemical adsorption while ensuring optimal physical adsorption will become the research focus of atom-doping-modified, biochar-based, CO2 adsorbents in the future. We believe that these summaries are valuable for systematically understanding heteroatom-doped biochar to CO2 adsorption and will serve as a theoretical support for heteroatom doping research.

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