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Photo-piezocatalysis in electrospun PVDF + WS2 membrane
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2022-09-12 , DOI: 10.1039/d2en00699e Sahil Verma 1 , Moolchand Sharma 1 , Rahul Vaish 1
Environmental Science: Nano ( IF 5.8 ) Pub Date : 2022-09-12 , DOI: 10.1039/d2en00699e Sahil Verma 1 , Moolchand Sharma 1 , Rahul Vaish 1
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PVDF + WS2 fibers were fabricated via an electrospinning method and utilised as sample materials to explore the effect of structure on catalytic activity. It is discovered that the electrospun PVDF + WS2 composite has superior piezocatalytic and photocatalytic properties compared to PVDF. This can be attributed to the increased spontaneous polarisation caused by the ferroelectric PVDF contact, which is also supported by piezo force microscopy (PFM) analysis. Piezocatalysis was examined under ultrasonication as well as under low-frequency vibrations. When membranes were subjected to low-frequency vibrations, the composite membrane was able to degrade 44% MB dye (2.5 mg L−1) in 240 min, making it a viable candidate for the removal of contaminants. Furthermore, the by-product of the photo-piezo degraded dye was studied for phytotoxicity assessment using Vigna radiata seeds. In addition, the composite membrane photocatalytically eliminated more than 99% of Escherichia coli and Staphylococcus aureus bacteria within 120 min of visible light exposure. We propose that this work offers mechanistic insights into the role of phase structures towards catalytic performance and an innovative strategy for developing environmentally friendly catalysts capable of efficiently utilising different energy sources.
中文翻译：
电纺 PVDF + WS2 膜中的光压电催化
PVDF + WS 2纤维通过静电纺丝法制备并用作样品材料以探索结构对催化活性的影响。发现电纺PVDF+WS 2复合材料与PVDF相比具有优异的压电催化和光催化性能。这可归因于铁电 PVDF 接触引起的自发极化增加，压电力显微镜 (PFM) 分析也支持这一点。在超声处理和低频振动下检查了压电催化。当膜受到低频振动时，复合膜能够降解 44% MB 染料（2.5 mg L -1) 在 240 分钟内，使其成为去除污染物的可行候选者。此外，使用辐射豇豆种子研究了光压电降解染料的副产物用于植物毒性评估。此外，复合膜在可见光照射下 120 分钟内光催化消灭了 99% 以上的大肠杆菌和金黄色葡萄球菌。我们建议这项工作为相结构对催化性能的作用提供了机理见解，并为开发能够有效利用不同能源的环保催化剂提供了创新策略。
更新日期：2022-09-12
中文翻译：
电纺 PVDF + WS2 膜中的光压电催化
PVDF + WS 2纤维通过静电纺丝法制备并用作样品材料以探索结构对催化活性的影响。发现电纺PVDF+WS 2复合材料与PVDF相比具有优异的压电催化和光催化性能。这可归因于铁电 PVDF 接触引起的自发极化增加，压电力显微镜 (PFM) 分析也支持这一点。在超声处理和低频振动下检查了压电催化。当膜受到低频振动时，复合膜能够降解 44% MB 染料（2.5 mg L -1) 在 240 分钟内，使其成为去除污染物的可行候选者。此外，使用辐射豇豆种子研究了光压电降解染料的副产物用于植物毒性评估。此外，复合膜在可见光照射下 120 分钟内光催化消灭了 99% 以上的大肠杆菌和金黄色葡萄球菌。我们建议这项工作为相结构对催化性能的作用提供了机理见解，并为开发能够有效利用不同能源的环保催化剂提供了创新策略。
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