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首页> 外文期刊>The Journal of the Textile Institute >Silver sulfide quantum dots as sensitizer in self-cleaning of Bombyx mori silk fabrics with nano-titania
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Silver sulfide quantum dots as sensitizer in self-cleaning of Bombyx mori silk fabrics with nano-titania

机译：硫化银量子点在纳米二氧化钛蚕丝织物自洁中用作敏化剂

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摘要

In this paper, silver sulfide (Ag2S) quantum dots (QDs) were prepared and used as sensitizers in self-cleaning of Bombyx mori silk fabrics which were firstly treated with anatase nanotitania (TiO2) sols prepared under room temperature, then with Ag2S QDs modified by 2-Thioglycolic acid (TGA) or (3-Mercaptopropyl) trimethoxysilane (MPS). X-ray diffraction analysis reveals much purer and smaller sizes of acanthite phase of Ag2S QDs modified by MPS than those by TGA. Lower concentrations of silver ions in samples of MPS-Ag2S-modified fabrics were demonstrated by X-ray photoelectron spectra analysis. Degradation of methylene blue by Ag2S QD-sensitized TiO2 is in accordance with pseudo-first kinetic model. Decrease in contact angles and decoloration of red wine on silk fabrics show that Ag2S QDs modified by TGA or MPS can be used as sensitizer in photocatalytic reactions of TiO2. TGA appears highly efficient than MPS in sensitizing TiO2 with Ag2S QDs.
机译：本文制备了硫化银（Ag2S）量子点（QDs），并将其用作家蚕丝织物自清洁的敏化剂，该织物先用室温下制备的锐钛矿型纳米二氧化钛（TiO2）溶胶处理，然后再用Ag2S QDs改性由2-巯基乙酸（TGA）或（3-巯基丙基）三甲氧基硅烷（MPS）制备。 X射线衍射分析表明，MPS改性的Ag2S量子点的Tt相较TGA更为纯净和小。 X射线光电子能谱分析表明，MPS-Ag2S改性织物样品中的银离子浓度较低。 Ag2S QD敏化的TiO2对亚甲基蓝的降解符合拟第一动力学模型。丝绸上红酒接触角的减小和红酒的脱色表明，经TGA或MPS改性的Ag2S量子点可在TiO2的光催化反应中用作敏化剂。在用Ag2S量子点敏化TiO2方面，TGA似乎比MPS高效。

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