B、N双掺杂微生物衍生碳在电容脱盐中的应用

Application of B,N Double-Doped Microbial-Derived Carbon in Capacitive Desalination

电容脱盐是一项绿色环保、低成本、低能耗的海水脱盐技术,研发高性能的电极材料是该技术的关键所在。本工作以低成本的微生物为原料,采用可回收性硼酸作为开孔剂的绿色方法制备了高性能双掺杂微生物衍生碳(NBC),其丰富的杂原子掺杂增强了碳材料的电容吸附能力。研究结果表明,微生物衍生碳中丰富的杂原子能赋予其优异的赝电容特性。高通透介孔结构的生物质衍生碳能够有效脱除盐水中的NaCl(在1.2 V的电压下,NBC对NaCl的吸附量可以达到41.3 mg·g^(-1))。本研究可为电容脱盐领域电极碳材料的制备提供一种绿色方案。

As a new and green technology,capacitance desalination has the advantage of low cost and energy consumption.The selection of electrode material is the key to this technology.In this work,high-performance double-doped microbiota-derived carbon(NBC)was prepared from low-cost microorganisms using recyclable boric acid as pore opening agent by a green method,whose rich doping of heteroatoms enhanced the adsorption capacity of the carbon materials.Meanwhile,the abundant heteroatomic defects in biomass-derived carbon afford good pseudocapacitive properties.A capacitive desalting device,assembled by NBC as electrode material,can effectively remove NaCl in brine(under the voltage of 1.2 V,the adsorption capacity of NaCl can reach 41.3 mg·g^(-1)).This study provided a possible green solution for the preparation of the electrode materials in capacitive desalination.