| FT-IR与微量吸附量热联用研究BaO/Al_2O_3催化剂表面酸碱性质 |
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| 引用本文： | 葛欣,邹琥,沈俭一. FT-IR与微量吸附量热联用研究BaO/Al_2O_3催化剂表面酸碱性质[J]. 光散射学报, 2003, 15(4): 293-296 |
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| 作者姓名： | 葛欣 邹琥 沈俭一 |
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| 作者单位： | 南京大学化学化工学院,南京,210093 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，G1999022408，20233040，， |
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| 摘 要： | 运用红外光谱与微量吸附量热联用技术研究了焙烧温度对BaO/γ-Al2O3表面酸碱性的影响。结果表明,γ-Al2O3经1000℃焙烧转化为θ-Al2O3和α-Al2O3,BaOγ-Al2O3经高温焙烧后生成BaO·Al2O3和BaO·6Al2O3等物相。600℃焙烧后,BaO/γ-Al2O3的表面酸性比γ-Al2O3的稍有下降,而碱性却大为增强。经1000℃焙烧后,表面的酸碱性则均大为降低,只有少量较弱的酸碱性位。
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| 关 键 词： | BaO/γ-Al2O3 表面酸碱性 微量吸附量热 红外光谱 |
| 文章编号： | 1004-5929(2003)04-0293-04 |
| 收稿时间： | 2003-06-23 |
| 修稿时间： | 2003-06-23 |
The Technique Combining FT-IR with Microcalorimetric Adsorption and Its Application in Characterizing Surface Acidity/Basicity of BaO/γ-Al2O3 Catalysts |
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| GE Xin,ZOU Hu,SHEN Jian-yi. The Technique Combining FT-IR with Microcalorimetric Adsorption and Its Application in Characterizing Surface Acidity/Basicity of BaO/γ-Al2O3 Catalysts[J]. Chinese Journal of Light Scattering, 2003, 15(4): 293-296 |
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| Authors: | GE Xin ZOU Hu SHEN Jian-yi |
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| Affiliation: | GE Xin~*,ZOU Hu,SHEN Jian-yi |
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| Abstract: | Basic metal oxides BaO was added to γ-Al2O3 in order to obtain the supports with low acidity and high surface area at high temperatures. The technique combining FT-IR with microcalorimetric adsorption for the adsorption of ammonia and carbon dioxide were used to study the catalysts. XRD results indicated the formation of aluminates on the supported samples calcined at high temperatures, which prevents the transformation of γ-Al2O3 to θ-Al2O3 and α-Al2O3. The addition of BaO did not seem to decrease the surface acidity of γ-Al2O3 significantly, but increased the surface basicity substantially when the sample was calcined at 600℃. Calcination of the BaO/γ-Al2O3 sample at 1000℃ resulted in the decrease of both acidity and basicity. |
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| Keywords: | BaO/γ-Al2O3 microcalorimetric adsorption FT-IR surface acidity/basicity |
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