Mass preparation of micro/nano-powders of biochar with water-dispersibility and their potential application
文献类型： 外文期刊
作者： Li, Linjian 1 ; Zhang, Kun 2 ; Chen, Li 1 ; Huang, Zhong 1 ; Liu, Guangbin 1 ; Li, Mingfang 1 ; Wen, Yangping 1 ;
作者机构： 1.Jiangxi Agr Univ, Inst Funct Mat & Agr Appl Chem, Nanchang 330045, Jiangxi, Peoples R China
2.Jiangxi Inst Red Soil, Nanchang 330046, Jiangxi, Peoples R China
期刊名称：NEW JOURNAL OF CHEMISTRY （ 影响因子：3.591； 五年影响因子：3.385 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Agroforestry waste being used as biochar, for agricultural, environmental and climatic applications, has attracted considerable attention, but there are few reports on biochar as electrode modified materials and solid fuel briquettes. In this paper, we demonstrated a new strategy for the mass preparation of micro/nano-powders of biochar with water-dispersibility and their potential applications in different fields. Ultra-fine powders of biochar were easily obtained through pyrolyzing fine powders of smashed biomass waste based on pitch pine at high temperature under oxygen-limited conditions. Micro/nanopowders of biochar were facilely prepared through milling and sieving ultra-fine powders of biochar. Water-dispersible biochars were easily developed through sonicating and centrifugally separating micro/nano-powders of biochar. The structures and properties of two biochar types were characterized, and upper-layer biochar was more steadily dispersed in water and of a smaller size than lower-layer biochar, which was mainly employed as an electrode material in a Pb2+ voltammetric sensor and as solid fuel briquettes for pellet biofuels, and other preliminary applications like use as rice bio-fertilizers and Pb2+ bio-adsorbents also were given. The satisfactory results indicated that micro/nano-structured and/or water-dispersible biochar will provide promising platforms for electrochemical applications as electrode materials, as a cleaner and renewable alternative to coal fuel, and for other uses, like as bio-fertilizers for crop seedling and growth, and as bio-adsorbents for the removal of hazardous substances.
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