Photocatalytic VOCs Degradation Efficiency of Polypropylene Membranes by Incorporation of TiO 2 Nanoparticles.
Md Abu HanifHyokyeong ShinDanbi ChunHong Gun KimLee Ku KwacYoung Soon KimPublished in: Membranes (2022)
A class of serious environmental contaminants related to air, namely volatile organic compounds (VOCs), has currently attracted global attention. The present study aims to remove harmful VOCs using as-prepared polypropylene membrane + TiO 2 nanoparticles (PPM + TiO 2 NPs) via the photocatalytic gas bag A method under UV light irradiation. Here, formaldehyde was used as the target VOC. The PPM + TiO 2 NPs material was systematically characterized using various microscopic and spectroscopic techniques, including field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, photoluminescence spectroscopy, and contact angle measurements. These results confirm the successful preparation of PPM + TiO 2 NPs, which can be applied to the degradation of VOCs. Photocatalytic degradation of formaldehyde gas reached 70% within 1 h of UV illumination. The energy bandgap and photoluminescence intensity reductions are responsible for the improved photocatalytic activity. These characteristics increase the charge transport while decreasing the recombination of electron-hole pairs.
Keyphrases
- visible light
- electron microscopy
- high resolution
- quantum dots
- room temperature
- single molecule
- solid state
- reduced graphene oxide
- magnetic resonance imaging
- high intensity
- solar cells
- computed tomography
- radiation induced
- drinking water
- radiation therapy
- molecular dynamics simulations
- drug induced
- highly efficient
- oxidative stress
- climate change
- gas chromatography mass spectrometry
- gold nanoparticles
- life cycle