Thermal analysis of phosphorus-modified boehmite nanosheets and isoelectric points (IEP) of the corresponding γ-alumina View Full Text


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Article Info

DATE

2017-08-22

AUTHORS

Xingyu He, Jianchuan Sun, Xiangyu Xu, Zhi Lv, Jiaqing Song

ABSTRACT

Phosphorus-modified boehmite nanosheets were synthesized through equivalent-volume impregnation with Na2HPO4 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. More... »

PAGES

2249-2255

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10973-017-6619-3

DOI

http://dx.doi.org/10.1007/s10973-017-6619-3

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https://app.dimensions.ai/details/publication/pub.1091293948


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