Electrospun Self-assembled ZnO Nanofibers Structures For Photocatalytic Activity In Natural Solar Radiations To Degrade Acid Fuchsin Dye

Ashish Gupta1,3, Deoram V. Nandanwar2, Sanjay R. Dhakate1,3*

1Physics and Engineering of Carbon, Materials Physics and Engineering Division, CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India

2Department of Physics, Shri Mathuradas Mohota Collage of Science, Nagpur, India

3Academy of Science and Innovative Research (AcSIR), CSIR-NPL Campus, New Delhi, India

Adv. Mater. Lett., 2015, 6 (8), pp 706-710

DOI: 10.5185/amlett.2015.5834

Publication Date (Web): Aug 02, 2015

E-mail: dhakate@mail.nplindia.org

Abstract


Zinc oxide (ZnO) nanoparticles, self-assembled in the form of one dimensional ZnO nanofibers were synthesized using electrospinning technique from solution of polyvinyl alcohol (PVA) and zinc acetate followed by calcination at 600°C in oxidizing environment. Scanning Electron Microscope (SEM) analysis demonstrates that morphology of ZnO nanofibers having rough surface and corresponding Energy Dispersive Spectrometry (EDAX) confirmed the Zn: O atomic ratio approximately in 50:50. Transmission electron microscopy (TEM) images clearly demonstrate the rough morphology is due to the self-assembling of ZnO nanoparticles having diameter approximately 50nm. X-ray Diffraction (XRD) reveals the polycrystalline structure and Raman spectra show some shifts in phonon modes. The PL graph show exceptional emission at 342nm due to band-band transition. Under solar radiations as produced ZnO nanofibers degrades the 99% of 25ppm acid fuchsine which proven through UV spectra when compared to blank dye solution. This shows that natural solar radiations are sufficient to excite theses self-assembled high surface area ZnO nanofibers to show its photocatalytic activity.

Keywords

Electrospinning, nanoparticles, nanofibers, solar radiation, photocatalytic activity, self-assembly.

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