Enhancing light energy harvesting and storage properties of cellulose acetate/azobenzene films through perylene photosensitization

IF 6.5 Q1 CHEMISTRY, APPLIED Carbohydrate Polymer Technologies and Applications Pub Date : 2024-12-01 DOI:10.1016/j.carpta.2024.100621

Pablo Castillo , Felipe Ramos , Constanza Kremer , Oscar Ramírez , Sebastian Bonardd , David Diaz Diaz , Angel Leiva , Cesar Saldias

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Abstract

This study presents a straightforward approach to enhancing the light energy capture and storage properties of cellulose acetate/azobenzene (CA/Azb) films through photosensitization with a perylene derivative (Py). The films' photoisomerization (trans-to-cis) and reverse isomerization (cis-to-trans) behaviors were evaluated under cold white LED light. Incorporating varying concentrations of perylene significantly improved the films' optical performance and energy storage capacity. Notably, the photoisomerization time of CA/Azb/Py films decreased by up to 30% compared to CA/Azb films. Furthermore, the energy storage half-life for films with the highest perylene content reached 70 minutes, substantially longer than that of CA/Azb films (24 minutes). Remarkably, the energy density of the film with the highest perylene content reached 240 J g⁻¹, which is more than 1.7 times higher than that of the CA/Azb film (138 J g⁻¹).

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通过苝光敏化提高醋酸纤维素/偶氮苯薄膜的光能收集和储存性能

本研究提出了一种直接的方法，通过使用苝衍生物（Py）光敏化来增强醋酸纤维素/偶氮苯（CA/Azb）薄膜的光能捕获和储存性能。在冷白光LED下评价了薄膜的光异构化（顺-顺）和反异构化（顺-反）行为。加入不同浓度的苝显著提高了薄膜的光学性能和储能能力。值得注意的是，与CA/Azb膜相比，CA/Azb/Py膜的光异构化时间缩短了30%。此外，苝含量最高的薄膜的储能半衰期达到70分钟，大大长于CA/Azb薄膜的24分钟。值得注意的是，苝含量最高的膜的能量密度达到240 J g⁻¹，比CA/Azb膜（138 J g⁻¹）高1.7倍以上。

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来源期刊

Carbohydrate Polymer Technologies and Applications

CiteScore

8.70

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0.00%

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