MATERIALS AND SUSTAINABLE DEVELOPMENT: ADVANCED MATERIALS FOR CLEAN ENERGY UTILIZATION |
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Preparation and Photothermal Conversion Performance of Submicron Ti4O7 |
MA Chenyu1, 2, LI Xiaoyu2, ZHANG Hui2, LI Jianqiang2, ZHAO Jianling1, HE Gang3, LI Jiangtao3, QI Tao2
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1 School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130; 2 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; 3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 |
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Abstract 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 Ti4O7 powders. 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 Ti4O7 with particle size of ~0.35 μm were obtained, and its solar light absorption capacity was about 89.5%. Importantly, they can efficiently convert solar energy to thermal energy with photothermal conversion efficiency of 73.7%. When the submicron Ti4O7 was floating on the surface of the water, solar water vapor generation efficiency was increased by 2.15 times compared to the efficiency that submicron Ti4O7 was absent in the solar evaporation water experiment. Therefore, the submicron Ti4O7 is very promising photothermal conversion material.
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Published: 20 December 2018
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