摘要
光热转换是一种有效的太阳能利用技术,其效率主要取决于光热转换材料的光吸收能力。本研究通过低成本球磨法制备亚微米级的Ti_4O_7,采用扫描电镜、激光粒度仪、X射线衍射仪、差式扫描热分析仪表征其微观形貌、粒径大小、组成和比热容,用紫外-可见-近红外(UV-Vis-NIR)分光光度计和太阳光模拟器分别测试其光吸收能力和光热转换性能。结果表明,通过球磨法成功制备出粒径约0.35μm的亚微米Ti_4O_7粉末,其太阳光全光谱吸收能力约89.5%,光热转换效率约73.7%。当亚微米级Ti_4O_7漂浮在水面时,太阳光水蒸汽产生效率提高至无光热材料条件下的2.15倍。因此,亚微米级的Ti_4O_7作为光热转换材料具有很大应用潜力。
Photothermal conversion is considered to be the efficient solar energy utilization technology,which is highly dependent on solar absorption capacity of photothermal conversion materials.In this paper,the method of ball-milling was used to obtain submicron Ti4O7powders.Scanning electron microscopy(SEM),laser particle size analyzer,X-ray diffractometry(XRD),and scanning calorimetry(DSC)were used to characterize the morphology,compositions of samples,and absorption spectrum was mea-sured by UV-Vis-NIR spectrophotometer,and the photothermal conversion efficiency was performed by solar light simulator.The results showed that the Ti4O7with particle size of^0.35μm were obtained,and its solar light absorption capacity was about89.5%.Importantly,they can efficiently convert solar energy to thermal energy with photothermal conversion efficiency of73.7%.When the submicron Ti4O7was floating on the surface of the water,solar water vapor generation efficiency was increased by2.15times compared to the efficiency that submicron Ti4O7was absent in the solar evaporation water experiment.Therefore,the submicron Ti4O7is very promising photothermal conversion material.
作者
马晨雨
李晓禹
张绘
李建强
赵建玲
贺刚
李江涛
齐涛
MA Chenyu;LI Xiaoyu;ZHANG Hui;LI Jianqiang;ZHAO Jianling;HE Gang;LI Jiangtao;QI Tao(School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130;National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190;Key Laboratoryof Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2018年第23期4079-4083,4099,共6页
Materials Reports
基金
国家自然科学基金面上项目(51671181,51674232)
国家自然科学基金重点课题(51432004).
关键词
亚微米Ti4O7
球磨
光热转换效率
太阳光水蒸汽产生效率
submicron Ti4O7
ball-milling
photothermal conversion efficiency
solar steam generation efficiency
作者简介
马晨雨:男,1994年生,硕士研究生,主要从事新能源材料和纳米材料的研究 E-mail:chyma@ipe.ac.cn;李建强:通信作者,男,1975年生,研究员,主要从事凝固过程界面调控与新材料制备领域的研究 E-mail:jqli@ipe.ac.cn;赵建玲:通信作者,女,1969年生,教授,主要从事氧化物及复合氧化物纳米材料合成及性能研究 E-mail:zhaojl@hebut.edu.cn。
