Recent Development and Application of TiO2 Nanotubes Photocatalytic Activity for Degradation Synthetic Dyes – A Review

Abstract

Synthetic dyes waste from textile industries, produce of the problematic pollutants in wastewater. TiO2 based photocatalysis are materials that exhibit excellent absorption behavior for organic compounds in wastewater due it properties including nontoxicity, high photocatalysis degradation ability, and chemical stabilities. However, several challenges exist regarding TiO2 nanotubes pure applications for dyes degradation such as poor affinity, high band gap energy, and difficulty of recovery and easy to recombination so it would decrease effectiveness of the photocatalysis process. Therefore, more design and optimization testing need to be conducted on the treatment conditions in order to reach higher removal efficiencies with lower costs. The modified physical properties by adding metal dopant, nonmetal, and sensitizer significantly enhanced photocatalysis activity. These parameters, which affect photocatalysis activity on degrade dyes waste pollutants, are discussed in the current review. As a result, the photocatalysis becomes more expected, and encourages to further research development. Keywords: TiO2, nanotubes, degradation, synthetic, dyes

Synthesize Fe₃O₄-TiO₂Composite for Methyl Orange Photocatalytic Degradation

“…The following are some types of TiO2 nanocomposites, namely modification with charge transfer catalyst (Al2O3 and SiO2), coating with photosensitizing dyes [3,14] , noble metal deposition (Fe, Ag, Au, Pt), doping and grafting (CNT and MWCNT), coupling with semiconductors (semiconductor) CdS, ZnO, WO3), and modification with polymers (Poly amide, poly-lactic acid, polypyrrole) [15] . To reduce the loss of catalysts and maintain performance during the separation and recycling process is by adding magnetic properties to the catalyst.…”