摘要Interfacial solar-driven evaporation technique is an environmental friendly and cost-effective advanced approach for water purification using solar energy.Free energy sources are effectively utilized using the structural design of evaporators and functional materials.In this work,we have fabricated a solar-driven interfacial evaporation device with Banana Pseudo Stem(BPS)and a photothermal layer made up of PVA PDMS Carbon(PPC)is attached to it.High evaporation rate of 2.03 kg m-2 h-1 is achieved by the system under 1 sun illumination.Heat localization on interfacial surface,reflectance of photothermal layer,presence of micro-fluidic channels in BPS were studied using IR imaging,UV-DRS and SEM charac-terization techniques,respectively.Effective localization of interfacial temperature around 53℃and very low reflectance of photothermal layer substantiates high photothermal conversion efficiency of the device.The complete purification of water containing high concentration of Rhodamine-B dye using BPS is a novel and simple approach for water purification.This is an eco-friendly,cost-efficient novel approach in fabrication of interfacial solar-driven evaporation system with high evaporation rate for purification of water containing high concentration of organic dye.