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- W4224244505 endingPage "111921" @default.
- W4224244505 startingPage "111921" @default.
- W4224244505 abstract "Activated alumina has a porous structure and large specific surface area. It is often used as a catalyst carrier for various reactions. Currently, solution-phase methods (sol–gel reactions) that cause environmental pollution and resource waste are often used to synthesise activated alumina. To overcome this disadvantage, in this study, an eco-friendly low-heat solid-phase precursor method was developed to prepare activated alumina with improved properties (phase stability and specific surface area). The difference between the activated alumina synthesised by this method and a sol–gel method was studied in terms of the specific surface area and high thermal stability. The results indicated that after 4 h of treatment at 1100 °C, pure activated alumina obtained by the low-heat solid-phase precursor method maintained the γ-phase and had a specific surface area of 92 m2/g and pore volume of 0.68 cm3/g. On the other hand, pure activated alumina produced by the sol–gel method mainly consisted of the α-phase and had a specific surface area of only 21 m2/g and a low pore volume of 0.16 cm3/g. Upon doping with La and Ba, and heat-treating at 1100 °C for 4 h, the specific surface areas of the activated alumina samples obtained by the low-heat solid-phase precursor method and sol–gel methods were 109 and 119 m2/g, respectively. When heated at high temperatures, the percentage loss of the specific surface area of the activated alumina synthesised by the low-heat solid-phase precursor method was lower than that of the sample obtained by the sol–gel method, indicating that it can inhibit the crystal-phase transformation of alumina at high temperatures." @default.
- W4224244505 created "2022-04-26" @default.
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- W4224244505 date "2022-05-01" @default.
- W4224244505 modified "2023-09-27" @default.
- W4224244505 title "Synthesis and characterization of activated alumina with high thermal stability by a low-heat solid-phase precursor method" @default.
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- W4224244505 doi "https://doi.org/10.1016/j.micromeso.2022.111921" @default.
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