In this paper, RGO and GTube membranes are prepared to be used as absorbers in solar-driven interfacial evaporation. The GTube membrane could gain evaporation rate of 1.44 kg·m⁻²·h⁻¹ under 1200 W·m⁻², which is 20% larger than the RGO membrane. To explore the mechanism, the SEM and TEM images, water contact angles are tested. It is revealing that the GTube membrane forms much more pores for steam diffusion. The GTube membrane shows 97% of optical absorption within wavelength ranges from 250 to 2200 nm, while the RGO membrane is lower than 80%, revealing the GTube membrane could gather most of the solar radiation. Last, the permeability coefficient of RGO and GTube membranes are calculated by CFD model. The permeability coefficient of GTube membrane is 2-fold larger than the RGO membrane. This work provides a sight to construct the hollow carbon materials for improving optical absorption and permeability coefficient in solar-driven interfacial evaporation.

在本文中，RGO和GTube膜准备用作太阳能驱动的界面蒸发中的吸收剂。在1200 W·m ^-2的条件下，GTube膜的蒸发速率为1.44 kg·m ^-2 ·h ^-1，比RGO膜大20％。为了探索机理，对SEM和TEM图像，水接触角进行了测试。揭示了GTube膜形成了更多的用于蒸汽扩散的孔。GTube膜在250至2200 nm的波长范围内显示97％的光吸收，而RGO膜低于80％，表明GTube膜可以收集大部分太阳辐射。最后，通过CFD模型计算了RGO和GTube膜的渗透系数。GTube膜的渗透系数比RGO膜大2倍。这项工作为构造中空碳材料提供了一个视野，该材料可改善在太阳驱动的界面蒸发中的光吸收和渗透系数。