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Effect of HNO3 treatment on the surface acidity of activated carbons
Open accessAbstract
A homologous series of activated carbon samples was prepared from a low ash source carbon by controlled oxidation using nitric acid. The physicochemical properties (specifically, BET surface area, ash content, acid/base neutralization, and ammonia adsorption) were determined. Each property value changed systematically with increasing oxidation treatment; the more oxidized sample showed higher surface acidities without significant changes in BET area or ash content. The point of zero charge (PZC) of each sample was determined by mass and acid/base potentiometric titration. The PZC values also changed systematically with the extent of oxidation; the more oxidized the carbon, the lower its PZC. It is concluded that the PZC can be used as a convenient index for correlating changes in surface acidity of carbons.
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Cited by
Some aspects of the surface chemistry of carbon blacks and other carbons
Boehm, H. P. (1994) · Carbon · doi:10.1016/0008-6223(94)90031-0 · Cited by 3,043
Modification of the surface chemistry of activated carbons
Figueiredo, J. L., Pereira, M. F. R., Freitas, M. M. A., & Órfão, J. J. M. (1999) · Carbon · doi:10.1016/s0008-6223(98)00333-9 · Cited by 2,935
Largitte, L., & Pasquier, R. (2016) · Chemical Engineering Research and Design · doi:10.1016/j.cherd.2016.02.006 · Cited by 1,148
Carbon as catalyst and support for electrochemical energy conversion
Trogadas, P., Fuller, T. F., & Strasser, P. (2014) · Carbon · doi:10.1016/j.carbon.2014.04.005 · Cited by 522
Effect of modification with HNO3 and NaOH on metal adsorption by pitch-based activated carbon fibers
Shim, J.-W., Park, S.-J., & Ryu, S.-K. (2001) · Carbon · doi:10.1016/s0008-6223(00)00290-6 · Cited by 506
Metadata
- Authors
- Noh, J. S., & Schwarz, J. A.
- Venue
- Carbon
- Publisher
- Elsevier BV
- Published
- 1990
- Volume
- 28
- Issue
- 5
- Pages
- 675-682
- ISSN
- 0008-6223 (ISSN-L)
- OpenAlex
- W2084634636
- Cited by
- 529
- References
- 0
- FWCI
- 5.55
- Type
- journal article
- Language
- en
- Open access
- hybrid
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