Photocatalytic decolorization of Remazol Black 5 and Remazol Brilliant Orange 3R by mesoporous TiO 2

Chia Yun Chen, Meng Cheng Cheng, Arh Hwang Chen

Research output: Contribution to journalArticle

21 Citations (Scopus)


Mesoporous TiO 2 microparticles (TiO 2-11) were prepared through the micelle hydrothermal method using a 1:1 M ratio of 1-tetradecylamine:Ti(OiPr) 4. TiO 2-11 microparticles exhibited significantly higher decolorization percentage of Remazol Black 5 (RB5) and Remazol Brilliant Orange (3R) dyes than other TiO 2 microparticles formed with different molar ratios of 1-tetradecylamine:Ti(OiPr) 4, and P25 and anatase TiO 2. The results showed that the decolorization of the dyes by the microparticles was affected by the different irradiation wavelengths, catalyst dosages, dye concentrations, initial pH values, as well as electron acceptors. The kinetic experiments with varying initial pH values were in accordance with the second-order model. In addition, the adsorption study of the dyes in the dark fitted well with the Langmuir isotherm model. With the addition of 20 mmol/mL of three electron acceptors, H 2O 2, KBrO 3, and (NH 4) 2S 2O 8, the decolorization of the RB5 and 3R dyes increased by 54% and 35%, 59% and 41%, and 36% and 33%, respectively. Hence, this technique for the preparation of the mesoporous TiO 2 microparticles can facilitate more efficient decolorization of dyes in an aqueous solution.

Original languageEnglish
Pages (from-to)125-133
Number of pages9
JournalJournal of Environmental Management
Publication statusPublished - 2012 Jul 15

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

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