Nitrogen-doped microporous graphite-enhanced copper plasmonic effect for solar evaporation  

作　　者：Xintao Wu Chengcheng Li Ziqi Zhang Yang Cao Jieqiong Wang Xinlong Tian Zhongxin Liu Yijun Shen Mingxin Zhang Wei Huang 

机构地区：[1]School of Marine Science and Engineering,School of Chemistry and Chemical Engineering,Hainan University,Haikou,Hainan,China [2]Key Laboratory of Child Cognition and Behavior Development of Hainan Province,Qiongtai Normal University,Haikou,Hainan,China

出　　处：《Carbon Energy》2024年第3期215-223,共9页碳能源（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52162012,52262014,22368019);Key Research and Development Project of Hainan Province(Grant Nos.ZDYF2022SHFZ053,ZDYF2021GXJS209);Science and Technology Innovation Talent Platform Fund for South China Sea New Star of Hainan Province(Grant No.NHXXRCXM202305);Open Research Project of State Key Laboratory of Marine Resource Utilization in South China Sea(Grant No.MRUKF2023020).

摘　　要：Water scarcity is a global challenge,and solar evaporation technology offers a promising and eco-friendly solution for freshwater production.Photothermal conversion materials(PCMs)are crucial for solar evaporation.Improving photothermal conversion efficiency and reducing water evaporation enthalpy are the two key strategies for the designing of PCMs.The desired PCMs that combine both of these properties remain a challenging task,even with the latest advancements in the field.Herein,we developed copper nanoparticles(NPs)with different conjugated nitrogen-doped microporous carbon coatings(Cu@C–N)as PCMs.The microporous carbon enveloping layer provides a highly efficient pathway for water transport and a nanoconfined environment that protects Cu NPs and facilitates the evaporation of water clusters,reducing the enthalpy of water evaporation.Meanwhile,the conjugated nitrogen nodes form strong metal-organic coordination bonds with the surface of copper NPs,acting as an energy bridge to achieve rapid energy transfer and provide high solar-to-vapor conversion efficiency.The Cu@C–N exhibited up to 89.4%solar-to-vapor conversion efficiency and an evaporation rate of 1.94 kgm^(−2) h^(−1) under one sun irradiation,outperforming conventional PCMs,including carbon-based materials and semiconductor materials.These findings offer an efficient design scheme for high-performance PCMs essential for solar evaporators to address global water scarcity.

关 键 词：NANOCONFINEMENT photothermal conversion materials plasmonic resonance seawater desalination solar evaporation 

分 类 号：TQ127.1[化学工程—无机化工]