Room-temperature fabrication of Pt nanoparticle-dispersed porous WO3 gasochromic switchable films using oxalic acid

被引：4
作者：
Nishizawa, Kaori [1 ]
Hu, Chih-Wei [1 ]
Yamada, Yasusei [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Moriyama Ku, 2266-98 Shimo Shidami, Nagoya, Aichi 4638560, Japan
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2022年 / 245卷
关键词：
Tungsten trioxide; Oxalic acid; Gasochromic switchable film; Room-temperature fabrication; Sol-gel method; SWITCHING PROPERTIES; THIN-FILM; COLORATION; PRECURSOR; ALKOXIDES;
D O I：
10.1016/j.solmat.2022.111891
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：
Gasochromic switchable films are materials in which light transmittance properties are influenced by gases. In this study, Pt nanoparticle-dispersed tungsten trioxide (Pt-WO3) gasochromic switchable films were fabricated without heat treatment from a precursor solution containing oxalic acid. The fabricated films exhibited a porous structure with uniformly dispersed Pt nanoparticles. X-ray photoelectron spectroscopy profiles confirmed the reduction of Pt ions to metallic Pt. The fabricated Pt-WO3 films changed from being colorless and transparent to blue and transparent when exposed to 4% H-2-N-2 gas and transformed back to the colorless transparent state when exposed to air. In particular, the coloration of this film by H-2 gas was faster than decolorization by air, and its durability was confirmed for 400 switching cycles. This fabrication method does not require a high-temperature sintering process, and the films can be fabricated at room temperature, making the method applicable to substrates with low heat resistances.
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页数：6
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