Photocatalytic activity of TiO2 supported on multi-walled carbon nanotubes under simulated solar irradiation
Source abstract
Abstract
Abstract TiO2 particles supported on multi-walled carbon nanotubes (MWCNTs) were prepared using a sol–gel method to investigate their photocatalytic activity under simulated solar irradiation for the degradation of methyl orange (MO) in aqueous solution. The prepared composites were analyzed using XRD, SEM, EDS and UV–vis absorption spectroscopy. The results of this study indicated that there was little difference in the shape and structure of MWCNTs/TiO2 composite and pure TiO2 particles. The composite exhibited enhanced absorption properties in the visible light range compared to pure TiO2. The degradation of MO by MWCNTs/TiO2 composite photocatalysts was investigated under irradiation with simulated solar light. The results of this study indicated that MWCNTs played a significant role in improving photocatalytic performance. Different amounts of MWCNTs had different effects on photodegradation efficiency, and the most efficient MO photodegradation was observed for a 2% MWCNT/TiO2 mass ratio. Photocatalytic reaction kinetics were described using the Langmuir–Hinshelwood (L–H) model. The photocatalyst was reused for eight cycles, and it retained over 95.2% photocatalytic degradation efficiency. Possible decomposition mechanisms were also discussed. The results of this study indicated that photocatalytic reactions with TiO2 particles supported on MWCNTs under simulated solar light irradiation are feasible and effective for degrading organic dye pollutants.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Solar photocatalytic degradation of 2,6-dinitro-p-cresol (DNPC) using multi-walled carbon nanotubes (MWCNTs)–TiO2 composite photocatalysts10.1016/j.chemosphere.2009.01.014 ↗
2. Sunlight photocatalytic activity of CdS modified TiO2 loaded on activated carbon fibers10.1016/j.apsusc.2009.12.062 ↗
3. Effect of key operational factors on decolorization of methyl orange during H2O2 assisted CdS/TiO2/polymer nanocomposite thin films undersimulated solar light irradiation10.1016/j.seppur.2010.06.004 ↗
4. Solar photocatalytic degradation of water and air pollutions: challenges and perspectives10.1016/S0038-092X(98)00120-0 ↗
5. Characterization and photocatalytic activity of poly(3-hexylthiophene)-modified TiO2 for degradation of methyl orange under visible light10.1016/j.jhazmat.2009.03.135 ↗
6. Preparation and characterization of CdS–TiO2 nanoparticles supported on multi-walled carbon nanotubes10.1016/j.catcom.2010.03.006 ↗
7. Photocatalytic degradation of orange II by TiO2 catalysts supported on adsorbents10.1016/j.cattod.2004.08.010 ↗
8. Comparative study of removal of volatile organic compounds by cryogenic condensation and adsorption by activated carbon fiber10.1016/j.seppur.2003.12.016 ↗
9. Kinetics of photocatalytic degradation of aniline in water over TiO2 supported on porous nickel10.1016/S1010-6030(99)00232-4 ↗
10. Prevenient dye-degradation mechanisms using UV/TiO2/carbon nanotubes process10.1016/j.jhazmat.2008.06.083 ↗
11. Composites between photoactive anatase-type TiO2 and adsorptive carbon10.1016/S0169-4332(02)00081-8 ↗
12. Surface characteristics and photocatalytic activity of TiO2 loaded on activated carbon fibers10.1016/j.colsurfa.2004.11.027 ↗
13. Immobilization of TiO2 films on activated carbon fiber and their photocatalytic degradation properties for dye compounds with different molecular size10.1016/j.catcom.2008.02.018 ↗
14. Preparation of conductive polypyrrole/TiO2 nanocomposite via surface molecular imprinting technique and its photocatalytic activity under simulated solar light irradiation10.1016/j.colsurfa.2011.12.029 ↗
15. One-step synthesis of bifunctional tio2 catalysts and their photocatalytic activity10.1021/jp100519q ↗
16. Photochemical and photocatalytic degradation of an azo dye in aqueous solution by UV irradiation10.1016/S1010-6030(02)00374-X ↗
17. Fixed-bed photocatalysts for solar decontamination of water10.1021/es00052a015 ↗
18. Low temperature hydrothermal synthesis of CdS submicro- and microspheres self-assembled from nanoparticles10.1016/j.matlet.2007.10.013 ↗
19. New molten-salt synthesis and photocatalytic properties of La2Ti2O7 particles10.1016/j.jphotochem.2008.06.005 ↗
20. Photocatalytic hydrogen production from water over M-doped La2Ti2O7 (M=Cr, Fe) under visible light irradiation (>420nm)10.1021/jp0493226 ↗
21. Efficient degradation of benzene over LaVO4/TiO2 nanocrystalline heterojunction photocatalyst under visible light irradiation10.1021/es900393h ↗
22. Visible light photodegradation of phenol on MWNT–TiO2 composite catalysts prepared by a modified sol–gel method10.1016/j.molcata.2005.02.027 ↗
23. Effects of nano-Ag particles loading on TiO2 photocatalytic reduction of selenate ions10.1016/S1385-8947(03)00103-7 ↗
24. Photocatalytic oxidation of organics in water using pure and silver-modified titanium dioxide particles10.1016/S1010-6030(02)00049-7 ↗
25. Photocatalytic degradation of methyl orange by TiO2-coated activated carbon and kinetic study10.1016/j.watres.2005.12.042 ↗
26. Photocatalytic activity of poly(3-hexylthiophene)/titanium dioxide composites for degrading methyl orange10.1016/j.solmat.2010.05.025 ↗
27. Daylight photocatalysis by carbon-modified titanium dioxide10.1002/anie.200351577 ↗
28. Multiwalled carbon nanotubes decorated with nitrogen, palladium co-doped TiO2 (MWCNT/N, Pd co-doped TiO2) for visible light photocatalytic degradation of Eosin Yellow in water10.1007/s11051-012-0776-x ↗
29. Visible light photo-induced antibacterial activity of CNT-doped TiO2 thin films with various CNT content10.1039/c0jm00543f ↗