TiO2 Immobilized on Manihot Carbon: Optimal Preparation and Evaluation of Its Activity in the Decomposition of Indigo Carmine
Open accessAbstract
Applications of carbon-TiO2 materials have attracted attention in nanotechnology due to their synergic effects. We report the immobilization of TiO2 on carbon prepared from residues of the plant Manihot, commercial TiO2 and glycerol. The objective was to obtain a moderate loading of the anatase phase by preserving the carbonaceous external surface and micropores of the composite. Two preparation methods were compared, including mixing dry precursors and immobilization using a glycerol slurry. The evaluation of the micropore blocking was performed using nitrogen adsorption isotherms. The results indicated that it was possible to use Manihot residues and glycerol to prepare an anatase-containing material with a basic surface and a significant SBET value. The activities of the prepared materials were tested in a decomposition assay of indigo carmine. The TiO2/carbon eliminated nearly 100% of the dye under UV irradiation using the optimal conditions found by a Taguchi L4 orthogonal array considering the specific surface, temperature and initial concentration. The reaction was monitored by UV-Vis spectrophotometry and LC-ESI-(Qq)-TOF-MS, enabling the identification of some intermediates. No isatin-5-sulfonic acid was detected after a 60 min photocatalytic reaction, and three sulfonated aromatic amines, including 4-amino-3-hydroxybenzenesulfonic acid, 2-(2-amino-5-sulfophenyl)-2-oxoacetic acid and 2-amino-5-sulfobenzoic acid, were present in the reaction mixture.
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The adsorption is reversible, and the dye can be partially recovered by desorption, which can be advantageous for artisanal carpeting effluents.
“Interestingly, the adsorption is reversible, and the dye can be partially recovered by desorption, which can be advantageous in the case of artisanal carpeting effluents.”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [158]
A similar investigation using carbon from Manihot dulcis waste reported that the TiO2/carbon composite decomposed ∼50% of carminic acid under various conditions.
“a similar investigation has been reported using carbon from Manihot dulcis waste, 158 and the TiO 2 /carbon composite decomposed ∼50% of carminic acid under various conditions.”
From Sustainable hybrid photocatalysts: titania immobilized on carbon materials derived from renewable and biodegradable resources (2016) · cites this paper as [158]
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- Authors
- Antonio-Cisneros, C., Dávila-Jiménez, M., Elizalde-González, M., & García-Díaz, E.
- Affiliations
- Universidad del Papaloapan (MX)
- Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, Ciudad Universitaria, Edif. H105, Puebla 72570, Mexico
- Centro de Química -ICUAP, Universidad Autónoma de Puebla Ciudad Universitaria, Edif. H103, Puebla 72570, Mexico
- Venue
- International Journal of Molecular Sciences
- Publisher
- MDPI AG
- Published
- 2015-01-12
- Volume
- 16
- Issue
- 1
- Pages
- 1590-1612
- ISSN
- 1422-0067 (ISSN-L)
- PMC
- PMC4307322
- OpenAlex
- W2110521264
- Cited by
- 9
- References
- 40
- Citations by year
- 2023: 2 · 2022: 1 · 2018: 1 · 2017: 3 · 2016: 2
- FWCI
- 0.59
- Type
- journal article
- Language
- en
- Open access
- gold
- dx.doi.org
- Licence
- Locations
- International Journal of Molecular Sciences (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Keywords
- TiO2 immobilization, TiO2/carbon composites, anatase, micropore blocking, dye degradation, indigo carmine, photocatalysis, UV irradiation, Taguchi method, dye intermediates, biomass-derived carbon
- MeSH terms
- Carbon, Manihot, Coloring Agents, Indigo Carmine, Photolysis, Titanium, Ultraviolet Rays
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