期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 121, 期 23, 页码 12658-12668出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b12155
关键词
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资金
- Fondo Nacional de Investigaciones Cientificas y Tecnologicas (FONDECYT, Chile) [11130157, 1160639, 1130272, 3140526]
- CEDENNA through Financiamiento Basal para Centros Cientificos y Tecnologicos de Excelencia [FB0807]
- NSF DMR [1609107]
- Laboratory Directed Research and Development (LDRD) program of Sandia National Laboratories
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1609107] Funding Source: National Science Foundation
The effects of Na/K substitution during the synthesis of imogolite nanotubes (NTs) were studied using a combination of structural and surface analyses. These were complemented with molecular dynamics (MD) and DFT computational models. Our results provide strong experimental evidence, obtained by various characterization techniques (FT-IR, XRD, IEP, charge measurement, and HR-TEM), showing that K changes the imogolite dimensions. In fact, in the presence of K, the nanotubes become shorter and adopt a larger diameter. Moreover, the presence of the amorphous structures associated with allophane increases, even for low K concentrations. Our results underline the complexity of imogolite synthesis engineering, highlighting their high sensitivity to the chemicals that are used during synthesis.
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