摘要：采用简单的一步溶剂热方法制备系列不同比例活性炭（活性炭与CoFe2O4的质量比为1:1；2:1；3:1；4:1）负载纳米铁酸钴复合材料（C-CoFe2O4）。通过XRD，BET和SEM对复合材料进行表征，结果表明铁酸钴粒子均匀分散于活性炭的孔隙中，且C-CoFe2O4复合材料的比表面积与纯铁酸钴相比明显增大。采用循环伏安、恒电流充放电和交流阻抗测试方法对其电化学性能进行了测试。电化学测试表明，C-CoFe2O4电极在1mol· L–1的H2SO4电解液中，0~1V电位范围内，有良好的电容性能，且内阻减小，导电性增强；在0。2A/g电流密度下，C-CoFe2O4（4:1）的比容量可达到184。8 F/g，这与纯CoFe2O4的6。260 F/g 相比有很大提高，但活性炭本身的比容量为135。2 F/g就比较大，如何进一步提高其电化学性能还有待进行深入研究。以光催化降解甲基橙为探针，研究复合材料的光催化性能，结果表明复合材料对甲基橙的降解率从0。2196%增加到77。01%。78731

毕业论文关键词：超级电容器，铁酸钴，活性炭，光催化

Abstract：Different proportions of activated carbon loading cobalt ferrite nanoparticles composites was prepared by a facile one-step solvothermal method。 The obtained composite materials were characterized by XRD, BET and SEM。 The results show that cobalt ferrite particles are uniformly dispersed in the pores of the activated carbon。 And the specific surface area of C-CoFe2O4 composites increased significantly compared with the pure cobalt ferrite。 The electrochemical properties of C-CoFe2O4 composites were tested by cyclic voltammetry, galvanostatic charge-discharge test and AC impedance method。 Electrochemical tests show that, comparing with that of pure CoFe2O4, C-CoFe2O4 electrode have better capacitive properties and less resistance when tested in 1mol/L H2SO4, scanned in the range of 0 ~ 1V。 The capacity of C-CoFe2O4 (4: 1) is 184。8 F / g, whereas the capacity of pure CoFe2O4 is 6。260 F / g under  0。2A / g current density。 But the specific capacity of the activated carbon itself (135。2 F / g) is relatively large, how to further improve its electrochemical properties have yet to be carried out in-depth study。 Photocatalytic degradation of methyl orange was chosen as a probe to study the photocatalytic properties of composite materials, results showed that the degradation rate of methyl orange was improved from 0。2196% to 77。01% after pure CoFe2O4 was modified with activated carbon。

Keyword：supercapacitors, cobalt ferrite, activated carbon, photocatalytic

目录

1 绪论 1

2  实验部分 2

2。1  实验材料及设备 2

2。1。1  实验材料 2

2。1。2  实验设备 2

2。1。3  测试仪器 2

2。2  电极材料的制备 2

2。2。1  活性炭的处理 2

2。2。2  活性炭复合纳米铁酸钴材料的制备 3

2。3  电化学性能的测试 3

2。3。1  电极的制备 3

2。3。2  电极性能测试 3

2。3。3  循环寿命测试 4

2。4  可见光催化活性的测试 4

3。  结果讨论 5

3。1  结构表征