银掺杂碳纳米管电极在微生物燃料电池中的应用

Application of Ag-CNTs electrode in microbial fuel cell

采用溶液共混法合成银掺杂的碳纳米管溶胶,将溶胶涂敷在钛板表面,成功制备了银掺杂的碳纳米管电极(Ag-CNTs/Ti),通过扫描电镜(SEM)、X射线衍射(XRD)和能量色散X射线(EDX)对其进行表征,并应用循环伏安法研究其电化学性质.以银掺杂碳纳米管电极为阳极,石墨电极为阴极,葡萄糖溶液为阳极区基质,构建微生物燃料电池.实验表明:当温度为40℃,外阻为2 300Ω,AgNO3掺杂量为0.4g,葡萄糖质量浓度为1.257g·L-1时,微生物燃料电池的最大输出电压为811mV,表观内阻为296Ω,化学耗氧量(COD)降解率为84%.

Ag-doped carbon nanotube sol is synthesized by solution co-blending method and applied onto titanium plate for the preparation of Ag-CNTs/Ti. The composite electrode is characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and energy dispersion X-ray （EDX）, and its electrochemical properties are studied by cyclic voltammeter （CV）. Two-chambered microbial fuel cell （MFC） is constructed with composite electrode as anode, flexible graphite as cathode and glucose solution as substrate in anode chamber. At 40 ℃, external resistance with 2 300 Ω, composite electrode with doping AgNO3 of 0.4 g and glucose （substrate） solution with concentration of 1. 257 g · L^-1, MFC possesses the maximum output voltage with 811 mV, apparent resistance with 296 Ω, removal rate with 84% for COD.