生物炭
热解
制作
催化作用
机制(生物学)
化学工程
化学
材料科学
废物管理
纳米技术
有机化学
工程类
物理
医学
病理
量子力学
替代医学
作者
Hongyu Liu,Qiang Han,Xueyao Zhang,Huan Zhang,Huicai Wang,Junfu Wei
标识
DOI:10.1016/j.jaap.2023.106293
摘要
In this work, N-doped biochar balls NBC3800 were prepared from waste biomass corn straw. The biochar balls supported by clay have an obvious spherical structure. Clay can enhance the adsorption capacity of the biochar balls to pollutants by its excellent adsorption property. Thus, the clay can speed up the catalytic reaction by strengthening the adsorption function. The biochar balls NBC3800 have the best catalytic performance and the removal rate of NC can reach 100% within 100 min. The electron transfer resistance of NBC3800 is only 36 Ω indicating a lower resistance value and higher conductivity to transfer electrons compared with carbon nanotube. Electron paramagnetic resonance (EPR) and electrochemical analysis show that sulfate radical (SO4•−), hydroxyl radical (·OH), singlet oxygen (1O2), and electron transfer are all involved in the reaction. The removal rate of NC can still be maintained at 83.41% after being reused five times. Besides, it can be further improved to 100% by high temperature regeneration at 800 ℃. Most importantly, the biochar balls can be separated from the solution very easily which not only extremely improves the recyclability but also avoids secondary pollution to the water body.
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