Superior photothermal black TiO2 with random size distribution as flexible film for efficient solar steam generation

被引：74

作者：

Zada, Imran ^{[1
]}

Zhang, Wang ^{[1
]}

Sun, Peng ^{[1
]}

Imtiaz, Muhammad ^{[1
]}

Iqbal, Nousheen ^{[1
]}

Ghani, Usman ^{[1
]}

Naz, Raheela ^{[1
]}

Zhang, Yunxuan ^{[2
]}

Li, Yao ^{[1
]}

Gu, Jiajun ^{[1
]}

Liu, Qinglei ^{[1
]}

Pantelic, Dejan ^{[3
]}

Jelenkovic, Branislav ^{[3
]}

Zhang, Di ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Haberdashers Askes Boys Sch, Butterfly Lane Elstree, Borehamwood WD6 3AF, Herts, England

[3] Univ Belgrade, Inst Phys, Pregrev 118, Belgrade 11080, Serbia

来源：

APPLIED MATERIALS TODAY | 2020年 / 20卷

基金：

中国国家自然科学基金;

关键词：

NANOTUBE ARRAYS; TITANIA; NANOPARTICLES; ENHANCEMENT; MEMBRANE; WOOD;

D O I：

10.1016/j.apmt.2020.100669

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Black photothermal materials with broadband solar absorption have attracted great interest for efficient steam generation. However, the solar steam device composed of thermal insulators and water supply paths makes the device more intricate and problematic to operate. Herein, inspired by random close packing structure of beetle, black TiO2 (BTiO2) film with random size distribution is fabricated for simplifying the vapor generation device. The BTiO2 with random size distribution realized a broadband absorption in the full spectrum of solar light (250-2500 nm) due to the plenty of oxygen vacancies/surface disorders/surface defects after the reduction process. When BTiO2 film irradiated under 1 sun illumination, the temperature is quickly changed from 25.4 degrees C to 90 degrees C within 120 s which leads to a superior photothermal effect. This high solar thermal energy conversion surpasses other photothermal materials (PMs) reported before. At the same time, when used for steam generation, the solar steam efficiency of 77.14% is achieved under 1 sun solar light irradiation without any thermal insulating management and water supply path. Furthermore, the BTiO2 films presented remarkable flexibility and strong mechanical robustness, which provide a promising approach to design new black materials of different size structures with high mechanical stability/flexibility for developing solar energy-related applications. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：10

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