The DOI matches its Crossref record.
Colloidal Properties of Aqueous Suspensions of Acid-Treated, Multi-Walled Carbon Nanotubes
Abstract
Grafting oxygen-containing functional groups onto carbon nanotubes (CNTs) by acid treatment improves their dispersion in aqueous solutions, but there is a lack of quantitative information on the colloidal properties of oxidized CNTs. We have studied the influence that pH and electrolytes have in determining the colloidal stability of oxidized multiwalled carbon nanotubes (O-MWCNTs), prepared by refluxing pristine MWCNTs in nitric acid. The acid-treated MWCNTs contained oxygen predominantly in the form of carboxyl groups. Colloidal suspensions of O-MWCNTs were prepared by low-power sonication and contained negatively charged, individual MWCNTs with an average length of approximately 650 nm. Time-resolved dynamic light scattering revealed that the aggregation rate of O-MWCNTs exhibited both reaction and mass-transport limited regimes in the presence of different electrolytes and as a function of pH. Particle stability profiles constructed from aggregation rate data allowed for the determination of critical coagulation concentrations (CCC), a metric of colloidal stability. The CCC values of O-MWCNTs varied with counterion concentration and valence in a manner consistentwith DLVO theory. Potentiometric measurements of surface charge correlated well with the observed pH-dependent variations in the O-MWCNT's colloidal stability. Electrophoretic mobility was also a diagnostic of particle stability, but only in neutral and acidic conditions.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
Stability of nanofluid: A review
Chakraborty, S., & Panigrahi, P. K. (2020) · Applied Thermal Engineering · doi:10.1016/j.applthermaleng.2020.115259 · Cited by 728
Chemical and structural characterization of carbon nanotube surfaces
Wepasnick, K. A., Smith, B. A., Bitter, J. L., & Howard Fairbrother, D. (2010) · Analytical and Bioanalytical Chemistry · doi:10.1007/s00216-009-3332-5 · Cited by 600
Self-citationEffects of Solution Chemistry on the Adsorption of Ibuprofen and Triclosan onto Carbon Nanotubes
Cho, H.-H., Huang, H., & Schwab, K. (2011) · Langmuir · doi:10.1021/la202459g · Cited by 263
Stabilization and dispersion of carbon nanomaterials in aqueous solutions: A review
Al-Hamadani, Y. A. J., Chu, K. H., Son, A., Heo, J., Her, N., Jang, M., Park, C. M., & Yoon, Y. (2015) · Separation and Purification Technology · doi:10.1016/j.seppur.2015.11.002 · Cited by 109
Optimization of Carbon Nanotube Dispersions in Water Using Response Surface Methodology
Zaib, Q., & Ahmad, F. (2019) · ACS Omega · doi:10.1021/acsomega.8b02965 · Cited by 46
Metadata
- Authors
- Smith, B., Wepasnick, K., Schrote, K. E., Bertele, A. R., Ball, W. P., O’Melia, C., & Fairbrother, D. H.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-12-29
- Volume
- 43
- Issue
- 3
- Pages
- 819-825
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2091384494
- Cited by
- 220
- References
- 0
- FWCI
- 6.50
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Colloidal Properties of Aqueous Suspensions of Acid-Treated, Multi-Walled Carbon Nanotubes. https://app.cochat.ai/papers/10.1021/es802011e
- The paper
- Smith, B., Wepasnick, K., Schrote, K. E., Bertele, A. R., Ball, W. P., O’Melia, C., & Fairbrother, D. H. (2009). Colloidal Properties of Aqueous Suspensions of Acid-Treated, Multi-Walled Carbon Nanotubes. Environmental Science & Technology. https://doi.org/10.1021/es802011e
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
