The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
Citric Acid Adsorption on TiO2 Nanoparticles in Aqueous Suspensions at Acidic and Circumneutral pH: Surface Coverage, Surface Speciation, and Its Impact on Nanoparticle−Nanoparticle Interactions
Abstract
Citric acid plays an important role as a stabilizer in several nanomaterial syntheses and is a common organic acid found in nature. Here, the adsorption of citric acid onto TiO(2) anatase nanoparticles with a particle diameter of ca. 4 nm is investigated at circumneutral and acidic pHs. This study focuses on both the details of the surface chemistry of citric acid on TiO(2), including measurements of surface coverage and speciation, and its impact on nanoparticle behavior. Using macroscopic and molecular-based probes, citric acid adsorption and nanoparticle interactions are measured with quantitative solution phase adsorption measurements, attenuated total reflection-FTIR spectroscopy, dynamic light scattering techniques, and zeta-potential measurements as a function of solution pH. The results show that surface coverage is a function of pH and decreases with increasing pH. Surface speciation differs from the bulk solution and is time dependent. After equilibration, the fully deprotonated citrate ion is present on the surface regardless of the highly acidic solution pH indicating pK(a) values of surface adsorbed species are lower than those in solution. Nanoparticle interactions are also probed through measurements of aggregation and the data show that these interactions are complex and depend on the detailed interplay between bulk solution pH and surface chemistry.
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Cites
Exposure Modeling of Engineered Nanoparticles in the Environment
Mueller, N. C., & Nowack, B. (2008) · Environmental Science & Technology · doi:10.1021/es7029637 · Cited by 1,828
Size Control of Gold Nanocrystals in Citrate Reduction: The Third Role of Citrate
Ji, X., Song, X., Li, J., Bai, Y., Yang, W., & Peng, X. (2007) · Journal of the American Chemical Society · doi:10.1021/ja074447k · Cited by 1,340
Synthetic TiO2 nanoparticle emission from exterior facades into the aquatic environment
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Surface chemistry of titania (anatase) and titania-supported catalysts
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Influence of Surface Potential on Aggregation and Transport of Titania Nanoparticles
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Self-citationMechanistic Study of Photomediated Triangular Silver Nanoprism Growth
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Interactions of Humic Acid with Nanosized Inorganic Oxides
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Cited by
Faure, B., Salazar-Alvarez, G., Ahniyaz, A., Villaluenga, I., Berriozabal, G., De Miguel, Y. R., & Bergström, L. (2013) · Science and Technology of Advanced Materials · doi:10.1088/1468-6996/14/2/023001 · Cited by 395
Azari, A., Nabizadeh, R., Nasseri, S., Mahvi, A. H., & Mesdaghinia, A. R. (2020) · Chemosphere · doi:10.1016/j.chemosphere.2020.126238 · Cited by 294
Mudunkotuwa, I. A., Minshid, A. A., & Grassian, V. H. (2014) · The Analyst · doi:10.1039/c3an01684f · Cited by 278
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Metadata
- Authors
- Mudunkotuwa, I. A., & Grassian, V. H.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-10-04
- Volume
- 132
- Issue
- 42
- Pages
- 14986-14994
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2016721948
- Cited by
- 297
- References
- 24
- FWCI
- 10.19
- Type
- journal article
- Language
- en
- Open access
- closed
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- Mudunkotuwa, I. A., & Grassian, V. H. (2010). Citric Acid Adsorption on TiO2 Nanoparticles in Aqueous Suspensions at Acidic and Circumneutral pH: Surface Coverage, Surface Speciation, and Its Impact on Nanoparticle−Nanoparticle Interactions. Journal of the American Chemical Society. https://doi.org/10.1021/ja106091q
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