Synthesis of nanostructured NiO and its application in laser-induced photocatalytic reduction of Cr(VI) from water

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75 Scopus citations

Abstract

Owing to its high toxicity, chromium(VI) is considered as top priority pollutant for many countries in the world and removal of this pollutant from waste water is highly desirable. The present investigation addresses the synthesis of NiO nanoparticles using sol-gel method and their application in heterogeneous photocatalytic reduction of Cr(VI) using a 355 nm laser radiation generated from Nd:YAG laser. The study showed that ∼90% Cr(VI) was removed within short laser exposure time (75 min) in presence of nanostructured NiO without the use of any additive as reported in other studies. Effect of critical parameters, such as calcination temperature, calcination time, laser energy, catalyst amount, chromium concentration, and added electron donor and acceptor on the photocatalytic reduction process was investigated. The photocatalytic reduction of metal was found to be strongly dependant on the above mentioned parameters.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume341
Issue number1-2
DOIs
StatePublished - 3 May 2011

Bibliographical note

Funding Information:
The support by Center of Excellence in Nanotechnology (CENT) and King Fahd University of Petroleum and Minerals (KFUPM) is gratefully acknowledged under project # 08-NAN-93-4.

Keywords

  • Chromium reduction
  • Laser applications
  • Nanostructured NiO
  • Photocatalysis
  • Water purification

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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