Photocatalytic degradation of polystyrene under mild conditions by nanostructured bismuth carbonate

IF 7.4 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2025-05-01 Epub Date: 2025-02-16 DOI:10.1016/j.polymdegradstab.2025.111271

Victor H. Pino-Ramos , E. Bucio , Lucy-Caterine Daza-Gómez , David Díaz

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Abstract

Polystyrene (PS) is a widely used single-use plastic and a major component of global waste. Its overaccumulation poses a critical environmental issue due to its non-biodegradable chemical structure, featuring phenyl moieties and long linear alkanes. Urgent recycling solutions are needed as the problem continues to worsen. In this work, the photodegradation of PS using (BiO)₂CO₃ nanoparticles under UV-light, converting it into useful products like phthalates which have potential applications as plasticizers. The effects of catalyst load and exposure time on the reaction yield are discussed in this research. The (BiO)₂CO₃ nanoparticle powders were obtained by atmospheric CO₂ absorption, and they were characterized using XRD, SEM, HRTEM and SEM-EDS. The oxidized PS was analyzed using FTIR-ATR, TGA, and DSC, confirming successful oxidation at room temperature. The degradation products were identified by FTIR, and their structures verified by NMR ¹H, ¹³C. This approach offers a promising recycling solution for PS waste.

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纳米结构碳酸铋在温和条件下光催化降解聚苯乙烯

聚苯乙烯（PS）是一种广泛使用的一次性塑料，也是全球废物的主要组成部分。由于其不可生物降解的化学结构（苯基部分和长线性烷烃），其过度积累造成了严重的环境问题。由于问题继续恶化，需要紧急回收解决方案。在这项工作中，使用（BiO）2CO3纳米颗粒在紫外线下光降解PS，将其转化为有用的产品，如邻苯二甲酸盐，具有潜在的增塑剂应用前景。讨论了催化剂用量和反应时间对反应收率的影响。采用大气CO2吸收法制备了（BiO）2CO3纳米颗粒粉体，并用XRD、SEM、HRTEM和SEM- eds对其进行了表征。氧化后的PS经FTIR-ATR、TGA和DSC分析，证实在室温下氧化成功。降解产物经FTIR鉴定，核磁共振1H、13C对其结构进行了验证。这种方法为PS废物的回收提供了一个有前途的解决方案。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.