Doping TiO2 with CuSO4 enhances visible light photocatalytic activity for organic pollutant degradation

Mark Daniel G. de Luna, Sergio GARCIA SEGURA, Chinee H. Mercado, Yao Tung Lin, Ming Chun Lu

Research output: Contribution to journalArticle

Abstract

Photocatalysis is one of the most promising advanced oxidation processes due to the capability of solid catalyst to continuously produce oxidant species under light irradiation. The use of conventional UV lamps is high cost intensive, which undermines the possible implementation in developing countries. Visible light active photocatalysts can overcome these challenges and find a market opportunity for competitive technology implementation. This work proposes the synthesis of visible light active catalyst following a facile sol-gel synthesis that introduces CuSO4 as dopant in TiO2. Results present complete abatement of methylene blue in 120 min of treatment under 50 mW cm−2 of blue light (λ = 450 nm), while commercial P25 TiO2 presented null abatement under identical conditions. Synthesis parameters including dopant level and calcination temperature allowed defining optimum synthesis conditions based on material characteristics modification and catalytic activity enhancement. A doping level of 0.21 mol% CuSO4 was identified as optimum condition to enable visible light photocatalysis of doped TiO2 catalysts calcined at 300 °C. Finally, operational parameters were evaluated defining a wide range of pH operation under 3.0 g L−1 of catalyst dose to treat up to 20 g L−1 of highly recalcitrant phenothiazine dye. These optimum conditions allowed complete dye removal under visible light after 120 min of treatment.

Original languageEnglish (US)
JournalEnvironmental Science and Pollution Research
DOIs
StatePublished - Jan 1 2019

Fingerprint

Organic pollutants
organic pollutant
Thermodynamic properties
Doping (additives)
Light
Degradation
catalyst
Catalysts
Photocatalysis
dye
Coloring Agents
Dyes
Ultraviolet lamps
Methylene Blue
Polymethyl Methacrylate
Photocatalysts
Oxidants
Developing countries
oxidant
Calcination

Keywords

  • Advanced oxidation process
  • Nanotechnology
  • Persistent organic pollutants
  • Visible light photocatalyst
  • Wastewater treatment

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Doping TiO2 with CuSO4 enhances visible light photocatalytic activity for organic pollutant degradation. / de Luna, Mark Daniel G.; GARCIA SEGURA, Sergio; Mercado, Chinee H.; Lin, Yao Tung; Lu, Ming Chun.

In: Environmental Science and Pollution Research, 01.01.2019.

Research output: Contribution to journalArticle

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