Urgently reveal longly hidden toxicant in a familiar fabrication process of biomass-derived environment carbon material

Biomass-derived N-doped carbon (BNC) is an important environmental material and widely used in the fields of water purification soil remediation. However, toxicant commonly synthesis process BNC materials have been largely ignored. Herein, we firstly report presence a highly toxic by-product (KCN) activation consequential carbothermal reduction reaction. Because this reaction also regulates N-doping pore development materials, KCN content directly relates with properties properties. Accordingly, high (? 611 mg) can occur production per g specific surface area 3600 m2/g). application performance determined by available N doping, therefore, entails risk. Undoubtedly, study proves completely new risk recognition on familiar biomass-based material. And, strict protective device should be taken fabrication biomass-derived