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- Title
Thermal analysis of phosphorus-modified boehmite nanosheets and isoelectric points (IEP) of the corresponding γ-alumina.
- Authors
He, Xingyu; Sun, Jianchuan; Xu, Xiangyu; Lv, Zhi; Song, Jiaqing
- Abstract
Phosphorus-modified boehmite nanosheets were synthesized through equivalent-volume impregnation with NaHPO solutions, which was further calcined to form γ-alumina. The XRD and HR-TEM analyses indicated that the phosphorus modification had no significant effects on the framework of the boehmite nanosheets. The FTIR spectra suggested that the phosphorus groups replaced some -OH groups and formed P-O-Al bonds with the boehmite. The modified boehmite nanosheets impregnated at the P/Al molar ratio of 1% showed a α-phase transition temperature at 1298.3 °C, much higher than that of boehmite (1189.1 °C). The IEP of the phosphorus-modified γ-alumina prepared by 2 h calcination of phosphorus-modified boehmite (P/Al = 5%) at 600 °C was as low as 7.1.
- Subjects
THERMAL analysis; BOEHMITE; ISOELECTRIC focusing; ALUMINUM oxide; PHOSPHORUS
- Publication
Journal of Thermal Analysis & Calorimetry, 2017, Vol 130, Issue 3, p2249
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-017-6619-3