Broadband Absorption and Photothermal Conversion Properties of Oxygen-Deficient TiO2 Aqueous Nanofluids

被引：2
作者：
Chen, Lei [1 ,2 ]
Yao, Dongxu [1 ]
Liang, Hanqin [1 ]
Xia, Yongfeng [1 ]
Zeng, Yu-Ping [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
ENERGY TECHNOLOGY | 2023年 / 11卷 / 07期
基金：
国家重点研发计划;
关键词：
nanofluids; oxygen vacancies; oxygen-deficient TiO2; solar energy; solar thermal conversion; SOLAR; SURFACE; ORIGIN;
D O I：
10.1002/ente.202300112
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Oxygen-deficient TiO2 with unique electrical and optical properties has attracted enormous attention in the field of solar energy due to its excellent photocatalytic performance. Nevertheless, there are few works associating oxygen-deficient TiO2 with solar heat production. Herein, oxygen-deficient TiO2 is obtained by vacuum heat treatment technology. The solar absorption becomes increasingly stronger with the heat treatment temperature. 1200 degrees C is an appropriate treatment temperature for oxygen-deficient TiO2 according to X-ray diffraction analysis and ultraviolet, visible, near-infrared, at which the light absorption of oxygen-deficient TiO2 can be five times as original TiO2, viz. 81.4%. Moreover, the solar thermal conversion efficiency for the oxygen-deficient TiO2 nanofluids is 75.2%. A simple and general method for preparing oxygen-deficient TiO2 for solar heat production is developed.
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页数：8
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