广东工业大学学报2024，Vol.41Issue(3)：36-42,7.DOI:10.12052/gdutxb.230070
树枝状介孔二氧化硅负载纳米银用于太阳能驱动的清洁水生产
Dendritic Mesoporous Silica Loaded with Nanostructured Silver for Solar-driven Clean Water Production
摘要
Abstract
The Ag@DMSNs composite was prepared by synthesizing the dendritic mesoporous silica nanoparticles(DMSNs)and subsequently loading the nanostructured Ag in the pore channels of the DMSNs via chemical reduction.Thus-obtained Ag@DMSNs feature an intensive and board absorption for the solar irradiation due to the plasmonic coupling of Ag nanostructures,which are anchored in the pore channels of DMSNs and not prone to aggregation.More importantly,the thermal effect of plasmonic relaxation can efficiently convert solar energy into heat.For example,Ag@DMSNs can increase its surface temperature from 26℃to 70℃within 5 minutes under one sun(1 kW·m-2,420～2500 nm).When Ag@DMSNs are loaded on the porous polyurethane foam material,the water evaporation rate reaches 1.10 kg·m-2·h-1 under one sun,and they also exhibit excellent stability in simulated seawater.In addition,the thermal electrons produced during the relaxation of the Ag nanoparticle plasmon in the Ag@DMSNs complex can effectively remove contaminants from water,such as the degradation of methylene blue.These results show that it is an effective way to realize solar-powered clean water production by rational construction of the plasmonic coupling model and utilizing the thermal and hot-electron effect of plasmonic relaxation process,opening new avenues to tackling the deteriorating problem of fresh water scarcity.关键词
等离激元/纳米银/介孔二氧化硅/太阳能界面水蒸发/光热转化Key words
plasmon/nanostructured silver/mesoporous silica/solar interfacial evaporation/photothermal conversion分类
能源科技引用本文复制引用
余芳盈,欧玮辉,王玉洁,何军..树枝状介孔二氧化硅负载纳米银用于太阳能驱动的清洁水生产[J].广东工业大学学报,2024,41(3):36-42,7.基金项目
广东省基础与应用基础研究基金资助项目(2019A1515011603) （2019A1515011603）
