GUO Qianni (1995-), female, Master candidate. E-mail: 1303412026@qq.com
The boron-doped mesoporous carbon (BMCs) and boron-doped graphene-based mesoporous carbon (BMC/GO) were synthesized by a solvent evaporation-induced self-assembly method with block copolymer F127 as a soft template, boric acid as a boron source, phenolic resin prepolymer carbon sources and graphene-oxide (GO) as modifiers. The structures of the materials were characterized by transmission electronic microscopy, X-ray diffrication, nitrogen adsorption-desorption, and X-ray photoelectric microscopy. The electrochemical properties of samples were tested by electrochemical workstation. The structural characterization shows that the as-prepared composite material BMC/GO-40 (the mass of GO suspension is 40%) exhibits a great specific surface areas (i.e., 462.5 m2/g), and the average pore size is approximately 5 nm. The boron element mainly exists in the framework of mesoporous carbon in two forms, i.e., BC3 bonding and BCO2/BC2O bonding. Based on the results by electrochemical tests, the maximum specific capacitance can be obtained via the addition of an appropriate amount of boron doping and the adjustment of the composite amount of graphene oxide. The capacity of BMC/GO-40 sample is 167 F/g at a current density of 0.5 A/g.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |