MoS_(2)-g-C_(3)N_(4)纳米基气凝胶制备及其光热协同光催化净化染料废水

Preparation of MoS_(2)-g-C_(3)N_(4) nano-based aerogel and its synergistic photothermal and photocatalytic purification of dye wastewater

将界面太阳能水蒸发技术与光催化降解过程耦合被视为解决能源和环境问题的有效策略,但开发具有光热与催化协同效应的双功能蒸发器仍然具有挑战性.本文构建了MoS_(2)-g-C_(3)N_(4)(MG)异质结并将其负载于气凝胶上制备了一系列双功能的MoS_(2)-g-C_(3)N_(4)(MG)气凝胶蒸发器.这些MG气凝胶具有高比表面积、有效光吸收和高光催化活性,表现出优异的光热转换性能和光催化降解能力.MG气凝胶大的比表面积和丰富的孔隙结构不仅有利于水的渗透和蒸发焓的降低,还有利于有机污染物的吸附降解.其中,基于MG-0.4构筑的蒸发器具有1.72 kg m^(-2)h^(-1)的高水蒸发效率,同时表现出显著的罗丹明B降解效率(90.1%).这项工作为解决淡水短缺和水污染控制问题提供了一个新方法.

The coupling of interface solar water evaporation technology with photocatalytic degradation process is considered as an effective strategy to solve the energy and environmental issues.However,developing a bifunctional evaporator with synergistic effects of photothermal and photocatalytic properties is still challenging.In this study,MoS_(2)-g-C_(3)N_(4) heterojunction was constructed and a series of bifunctional MoS_(2)-g-C_(3)N_(4)(MG)aerogel evaporators were prepared.These MG aerogels exhibit excellent photothermal conversion and photocatalytic degradation due to their high specific surface area,effective light absorption,and high photocatalytic activity.The large specific surface area and abundant pore structure of MG aerogels are not only conducive to the reduction of water permeability and enthalpy of evaporation,but also conducive to the adsorption and degradation of organic pollutants.In particular,the evaporator based on MG-0.4 has a high water evaporation efficiency of 1.72 kg m^(-2)h^(-1)and shows a significant Rhodamine B(RhB)degradation efficiency(90.1%).This work proposes a potential method to address freshwater scarcity and water pollution.