Stannates, titanates and tantalates modified with carbon and graphene quantum dots for enhancement of visible-light photocatalytic activity - Publication - Bridge of Knowledge

Your account

login

Search

Stannates, titanates and tantalates modified with carbon and graphene quantum dots for enhancement of visible-light photocatalytic activity

Abstract

Most efforts in heterogeneous photocatalysis are focused on development of new and stable photoactive materials efficient in degradation of various pollutants under visible-light irradiation. In this regard, the wide-bandgap perovskite semiconductors, i.e., SrTiO3 (titanate), SrSnO3 (stannate) and AgTaO3 (tantalate), were prepared by a solvothermal method, and then modified with carbon quantum dots (CQDs) or graphene quantum dots (GQDs) co-modified with erbium. The photocactivity was investigated for: (i) toluene degradation (gas phase), (ii) phenol decomposition (aqueous phase), and (iii) inactivation of Escherichia coli K12 bacteria. It has been found that the morphology of semiconductors depends on the synthesis conditions, resulting in the formation of spherical particles, rods and faceted particles for SrTiO3, SnSrO3 and AgTaO3, respectively. Additionally, deposition of CQDs and GQDs/erbium has resulted in an enhancement of light harvesting, thus improved photoactivity under visible-light irradiation. Samples modified with both erbium and GQDs revealed much higher photoactivity than corresponding pristine and CQDs-modified samples. Moreover, all photocatalyst modified with GQDs and Er exhibited a significant antibacterial properties under visible light irradiation (λ>420 nm). Accordingly, it has been proposed that obtained semiconductors modified with QDs and Er are promising candidates as sustainable, clean and cheap materials for environmental purification under solar radiation.

Citations

  • 2 4

    CrossRef

  • 0

    Web of Science

  • 2 4

    Scopus

Authors (10)

Cite as

Full text

download paper
downloaded 97 times
Publication version
Accepted or Published Version
License
Creative Commons: CC-BY-NC-ND open in new tab

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
APPLIED SURFACE SCIENCE no. 541,
ISSN: 0169-4332
Language:
English
Publication year:
2021
Bibliographic description:
Paszkiewicz-Gawron M., Ewa K., Endo-Kimura M., Zwara J., Pancielejko A., Wang K., Lisowski W., Łuczak J., Zaleska-Medynska A., Grabowska-Musiał E.: Stannates, titanates and tantalates modified with carbon and graphene quantum dots for enhancement of visible-light photocatalytic activity// APPLIED SURFACE SCIENCE -Vol. 541, (2021), s.148425-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2020.148425
Sources of funding:
Verified by:
Gdańsk University of Technology

seen 137 times

Recommended for you

Remarkable visible-light induced hydrogen generation with ZnIn2S4 microspheres/CuInS2 quantum dots photocatalytic system

  • O. Cavdar,
  • A. Malankowska,
  • D. Amgar
  • + 4 authors
2021

Preparation and photocatalytic activity of Nd-modified TiO2 photocatalysts: Insight into the excitation mechanism under visible light

  • P. Parnicka,
  • P. Mazierski,
  • T. Grzyb
  • + 6 authors
2017

Optical and photocatalytic properties of rare earth metal-modified ZnO quantum dots

  • J. Sowik,
  • M. Miodyńska,
  • B. Bajorowicz
  • + 6 authors
2019

Synergy between AgInS2 quantum dots and ZnO nanopyramids for photocatalytic hydrogen evolution and phenol degradation

  • M. C. Nevárez Martínez,
  • B. Bajorowicz,
  • T. Klimczuk
  • + 4 authors
2020
Meta Tags