Application Of Edible Fungus Slag Derived Biochar In Organic Pollutant Adsorption And Sodium-ion Batteries

Nowadays,the rapid development of industrialization has brought great convenience to people’s lives,it also caused serious pollution of the ecological environment and the demanding of energy shortage.Novel energy and environmental materials play an important role in energy conversion/storage and environmental governance.China is an agricultural country,and making the best of agricultural waste has always been a strategy of development.As common agricultural waste,the culture medium of edible fungi has not been effectively utilized.In this work,the edible fungus slag has been recycled and reused to develop novel high-efficiency energy environmental materials.Porous carbon with the extremely high specific surface area（3342 m²/g）was prepared via carbonization and activation process by using edible fungus slag as raw materials.The porous carbon material showed excellent adsorption performance for bisphenol A,2,4-dichlorophenol and methylene blue with the maximum uptake capacity of 1249,1155 and 869 mg/g at 298.15 K,respectively,which was higher than other adsorbents and commercial activated carbon reported.Especially,the porous carbon material shows fast adsorption（reached⁹0%of the equilibrium uptake in the first 0.5 h）and prominent regeneration ability（78.4%of recovery efficiency after five adsorption/regeneration cycles）for bisphenol A.Furthermore,the porous carbon material exerts a good carbon skeleton function when applied to a sodium ion battery.The red phosphorus/porous carbon（PC@RP）composite was obtained by embedding the red phosphorus nanoparticles into porous carbon by evaporation-condensation method.In this composite material,the porous carbon skeleton enhances the electrical conductivity and alleviates the volume effect during charge/discharge process.A specific capacity of 670 mA h/g can be delivered at a current density of 0.1 A/g by PC@RP composite,and a capacity retention of 87%was achieved after 100 cycles.The high-performance sodium-ion full battery is successfully assembled with the red phosphorus/porous carbon composite as anode and P2-Na_2/3Ni_1/3Mn_1/3Ti_1/3O₂ as cathode,which delivers a specific capacity of 77.3mA h/g at a rate of 0.5 C with 85%capacity retention after 100 cycles.