Room temperature synthesis of novel worm like tin oxide nanoparticles for photocatalytic degradation of organic pollutants

Sivasankar Koppala, Ramdas Balan, Indranil Banerjee, Kangqiang Li, Lei Xu, Hua Liu, D. Kishore Kumar, Kakarla Raghava Reddy, Veera Sadhu

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Herein, we report the synthesis of novel worm like structured SnO2 nanoparticles photocatalysts by chemical precipitation route from sodium stannate in the absence of a precipitating agent. The physico-chemical characteristics of the synthesized SnO2 were studied using powder X-ray diffraction (PXRD), Diffuse Reflectance Spectroscopy (DRS), Photoluminescence (PL), and High resolution transmission electron microscope (HRTEM) studies. PXRD and HRTEM analysis reveals the formation of amorphous SnO2 in the tetragonal crystal structure. XPS and PL characterization affirmed the presence of oxygen defects in SnO2, which could be due to Sn2+ present in the lattices. The optical band gap calculated using Kubelka-Munk method to be 3.8 eV. Photocatalytic studies of the prepared SnO2 catalyst showed 92% of Rhodamine-B (RhB) degradation in 120 min under UV irradiation. The enhanced dye degradation activity is attributed to oxygen defects in the SnO2 catalyst, which are responsible for the enhanced charge separation and inhibition of electron-hole pair recombination by trapping photogenerated electrons.

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalMaterials Science for Energy Technologies
Volume4
DOIs
StatePublished - 1 Jan 2021
Externally publishedYes

Keywords

  • Band gap
  • Environmental remediation
  • Organic dye degradation
  • Oxygen defect
  • Photocatalyst
  • SnO nanoparticles

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