Innovative CO2 conversion: harnessing photocatalytic activity in polyvinylidene fluoride/TiO2 electrospun nanofibers for environmental sustainability

IF 1.7 4区化学 Q4 CHEMISTRY, PHYSICAL

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-09-28 DOI:10.1007/s11144-024-02719-6

Karan Gehlot, Rishi Raj, Sangeeta Tiwari, Rajaram Bal, Sandeep Kumar Tiwari

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Abstract

This study reports the synthesis and characterization of Polyvinylidene Fluoride (PVDF)/TiO₂ composite nanofibers for photocatalytic CO₂ conversion. The nanofibers were fabricated via electrospinning, with TiO₂ supported in a PVDF matrix. The electrospinning parameters were optimized, with the speed of drum collector, voltage, flow rate, and temperature set at 321 rpm, 20 kV, 1 ml h⁻¹, and 24 °C. SEM and XRD analyses revealed a nanofiber width of approximately 250 nm and the presence of anatase phase TiO₂, with primary diffraction peaks at 2θ values of 38.24° and 48.62°. The PVDF/TiO₂–NFs sample exhibited a BET surface area of 17.2689 ± 1.1154 m² g⁻¹, a BJH adsorption pore volume of 0.025 cm³ g⁻¹, and a BJH pore diameter of 7.26 nm. The photocatalytic performance of PVDF/TiO₂ nanofibers was evaluated through CO₂ conversion experiments, measuring the production of solar fuels (methanol and ethanol) and the efficiency of carbon utilization. The obtained yield of methanol is at 15.66 μg L⁻¹, while ethanol is recovered at 19.15 μg L⁻¹. The results demonstrated significant CO₂ reduction capabilities, highlighting the potential of PVDF/TiO₂ nanofibers as a sustainable solution for environmental remediation and renewable energy generation.

Graphical abstract

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创新性二氧化碳转化：利用聚偏二氟乙烯/二氧化钛电纺纳米纤维的光催化活性实现环境可持续性

本研究报告了用于光催化二氧化碳转化的聚偏二氟乙烯（PVDF）/二氧化钛复合纳米纤维的合成和表征。纳米纤维通过电纺丝制成，TiO2 被支撑在 PVDF 基体中。对电纺参数进行了优化，将转鼓收集器的转速、电压、流速和温度设定为 321 rpm、20 kV、1 ml h-1 和 24 °C。扫描电子显微镜和 XRD 分析表明，纳米纤维的宽度约为 250 纳米，存在锐钛矿相 TiO2，主衍射峰的 2θ 值为 38.24° 和 48.62°。PVDF/TiO2-NFs 样品的 BET 表面积为 17.2689 ± 1.1154 m2 g-1，BJH 吸附孔体积为 0.025 cm3 g-1，BJH 孔直径为 7.26 nm。通过二氧化碳转化实验评估了 PVDF/TiO2 纳米纤维的光催化性能，测量了太阳能燃料（甲醇和乙醇）的产量和碳的利用效率。甲醇的产量为 15.66 μg L-1，乙醇的回收率为 19.15 μg L-1。研究结果表明，PVDF/TiO2 纳米纤维具有显著的二氧化碳减排能力，凸显了其作为环境修复和可再生能源发电的可持续解决方案的潜力。

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来源期刊

Reaction Kinetics, Mechanisms and Catalysis CHEMISTRY, PHYSICAL-

CiteScore

3.30

自引率

5.60%

发文量

201

审稿时长

2.8 months

期刊介绍： Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields: -kinetics of homogeneous reactions in gas, liquid and solid phase; -Homogeneous catalysis; -Heterogeneous catalysis; -Adsorption in heterogeneous catalysis; -Transport processes related to reaction kinetics and catalysis; -Preparation and study of catalysts; -Reactors and apparatus. Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.