废旧锌锰电池生物淋滤-水热法制备纳米锰锌铁氧体
发布时间：2018-08-31 13:08
【摘要】：以氧化硫硫杆菌(A.thiooxidans)和氧化亚铁钩端螺旋菌(L.ferrooxidans)为混合淋滤菌株对废旧锌锰电池进行了生物浸提,并以获取的淋滤液为前驱体,采用水热法制备出系列锰锌铁氧体软磁材料(Mn_(1-x)Zn_xFe_2O_4,x=0.2~0.8);结合X射线衍射(XRD)、扫描电镜-能谱(SEMEDX)、振动样品磁强计(VSM)、透射电镜(TEM)、红外光谱(FT-IR)、热重-差热分析(TG-DTA)等表征手段对制备材料的结构、形貌、磁学性能和稳定性进行分析.结果表明,在5%固液比(质量体积比,5 g/100 mL,以下均表述为"5%固液比")下,经过5 d的外源酸调控生物浸提,分别获得了84.5%、63.2%的Zn、Mn浸出效率;当Zn∶Mn∶Fe=0.4∶0.6∶2.0(物质的量比,即x=0.4)时,制备的纳米级Mn_(0.6)Zn_(0.4)Fe_2O_4性能最优,属纯相的立方尖晶石结构,颗粒分布均匀,饱和磁化强度(M_s)、剩余磁化强度(M_r)和矫顽力(H_c)分别为68.9 emu·g~(-1)、4.7 emu·g~(-1)和53.6 Oe,具有热稳定性和耐酸碱性,有望成为一种新型的水处理磁性材料.
[Abstract]:Thiobacillus oxide (A.thiooxidans) and helicobacter ferrooxidans (L.ferrooxidans) were used as the mixed elution strains to extract the waste Zn / mn batteries, and the leaching solution was used as the precursor. A series of MnZn ferrite soft magnetic materials (Mn_ _ (1-x) Zn_xFe_2O_4,x=0.2~0.8) were prepared by hydrothermal method, and their structures were characterized by X-ray diffraction (XRD),) (XRD), scanning electron microscope (XRD),) -energy dispersive (SEMEDX), magnetometer (VSM), transmission electron microscope (FT-IR), thermogravimetric differential thermal analysis (TG-DTA), etc. Morphology, magnetic properties and stability were analyzed. The results show that under the conditions of 5% solid-liquid ratio (mass / volume ratio less than 5 g / 100 mL, is expressed as "5% solid-liquid ratio"), after 5 days of biological extraction by exogenous acid, the leaching efficiency of Zn,Mn is 84.5% and 63.2%, respectively. The nanocrystalline Mn_ (0.6) Zn_ (0.4) Fe_2O_4 has the best performance, which belongs to the pure phase cubic spinel structure, the particle distribution is uniform, the saturation magnetization (Maps), the residual magnetization (Mr) and the coercivity (HSC) are 68.9 emu g ~ (-1) 4.7 emu g ~ (-1) and 53.6 Oe, respectively. It is expected to be a new magnetic material for water treatment.
【作者单位】： 延安大学石油工程与环境工程学院;
【基金】：陕西省高水平大学专项资金项目(No.2013SXTS03) 延安市科技创新团队项目(No.2015CHTD-04) 延安大学博士科研启动项目(No.YDBK2017);延安大学引导项目(No.YDY2017-10);延安大学校级大创项目(No.D2016042)~~
【分类号】：TM277;X705
[Abstract]:Thiobacillus oxide (A.thiooxidans) and helicobacter ferrooxidans (L.ferrooxidans) were used as the mixed elution strains to extract the waste Zn / mn batteries, and the leaching solution was used as the precursor. A series of MnZn ferrite soft magnetic materials (Mn_ _ (1-x) Zn_xFe_2O_4,x=0.2~0.8) were prepared by hydrothermal method, and their structures were characterized by X-ray diffraction (XRD),) (XRD), scanning electron microscope (XRD),) -energy dispersive (SEMEDX), magnetometer (VSM), transmission electron microscope (FT-IR), thermogravimetric differential thermal analysis (TG-DTA), etc. Morphology, magnetic properties and stability were analyzed. The results show that under the conditions of 5% solid-liquid ratio (mass / volume ratio less than 5 g / 100 mL, is expressed as "5% solid-liquid ratio"), after 5 days of biological extraction by exogenous acid, the leaching efficiency of Zn,Mn is 84.5% and 63.2%, respectively. The nanocrystalline Mn_ (0.6) Zn_ (0.4) Fe_2O_4 has the best performance, which belongs to the pure phase cubic spinel structure, the particle distribution is uniform, the saturation magnetization (Maps), the residual magnetization (Mr) and the coercivity (HSC) are 68.9 emu g ~ (-1) 4.7 emu g ~ (-1) and 53.6 Oe, respectively. It is expected to be a new magnetic material for water treatment.
【作者单位】： 延安大学石油工程与环境工程学院;
【基金】：陕西省高水平大学专项资金项目(No.2013SXTS03) 延安市科技创新团队项目(No.2015CHTD-04) 延安大学博士科研启动项目(No.YDBK2017);延安大学引导项目(No.YDY2017-10);延安大学校级大创项目(No.D2016042)~~
【分类号】：TM277;X705
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