Eco-friendly synthesis of ZnO nanoparticles and ZnO@PVA nanofibers for enhanced hydrogen generation and CO2 conversion

IF 3.2 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-12-03 DOI:10.1007/s10971-024-06630-3

Zarah Alqarni

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Abstract

The demand for sustainable energy has accelerated the development of clean hydrogen production and CO₂ conversion into valuable products. This research explores the eco-friendly synthesis of zinc oxide nanoparticles (ZnO NPs) utilizing Calotropis procera leaf extract, and their incorporation into polyvinyl alcohol (PVA) nanofibers through electrospinning yielded composite nanomaterials with improved photocatalytic properties. Characterization using UV-Visible spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis confirmed the successful synthesis and structural integrity of the materials. The ZnO@PVA nanofibers exhibited a significant reduction in bandgap energy (2.85 eV) compared to ZnO NPs (3.35 eV), contributing to superior photocatalytic performance. The XRD analysis revealed that the average crystal sizes of the ZnO@PVA nanofibers and pure ZnO nanoparticles were 24 nm and 20 nm, respectively. Catalytic experiments demonstrated that ZnO@PVA nanofibers achieved a high CO₂ conversion rate of 97.54% and produced 16.28 mmol/g of hydrogen, outperforming ZnO NPs. These results (97.54% CO₂ conversion and 16.28 mmol/g hydrogen production) show that the green-synthesized nanoparticles have promising applications in sustainable energy and environmental remediation.

Graphical Abstract

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纳米氧化锌纳米粒子和ZnO@PVA纳米纤维的环保合成，以增强氢气生成和二氧化碳转化

对可持续能源的需求加速了清洁制氢和二氧化碳转化为有价值产品的发展。本研究探索了利用牛角花叶提取物环保合成氧化锌纳米粒子（ZnO NPs），并通过静电纺丝将其加入聚乙烯醇（PVA）纳米纤维中，得到了具有更好光催化性能的复合纳米材料。利用紫外可见光谱、傅里叶变换红外光谱、x射线衍射、扫描电镜和热重分析等方法进行表征，证实了材料的成功合成和结构完整性。与ZnO NPs （3.35 eV）相比，ZnO@PVA纳米纤维的带隙能量显著降低（2.85 eV），具有优异的光催化性能。XRD分析表明，ZnO@PVA纳米纤维和纯ZnO纳米粒子的平均晶粒尺寸分别为24 nm和20 nm。催化实验表明，ZnO@PVA纳米纤维的CO2转化率高达97.54%，产氢量为16.28 mmol/g，优于ZnO纳米纤维。结果表明，绿色合成纳米颗粒的CO2转化率为97.54%，氢气产量为16.28 mmol/g，在可持续能源和环境修复方面具有广阔的应用前景。图形抽象

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.