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人工晶体学报 ›› 2017, Vol. 46 ›› Issue (1): 143-147.

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燃烧法合成Y掺杂改性的γ-Al2 O3及其表征

杨雪娇;张瑾;崔雪娇;李冬霞;贾涵月;储刚   

  1. 辽宁石油化工大学化学与材料科学学院,抚顺,113001
  • 出版日期:2017-01-15 发布日期:2021-01-20
  • 基金资助:
    辽宁省自然科学基金(201202122);辽宁省教育厅资助项目(L2012125)

Synthesis and Characterization of Yttrium Modifiedγ-alumina by Combustion Method

YANG Xue-jiao;ZHANG Jin;CUI Xue-jiao;LI Dong-xia;JIA Han-yue;CHU Gang   

  • Online:2017-01-15 Published:2021-01-20

摘要: 以硝酸铝为氧化剂,甘氨酸作为还原剂,添加氧化钇作为改性剂,采用燃烧法合成了改性的纳米γ-Al2 O3粉体。研究了改性剂的添加量,煅烧温度,煅烧时间等工艺参数对产物的影响。以甘氨酸作为还原剂,氧化钇和硝酸铝的摩尔比为0.07∶1,煅烧温度950℃,煅烧时间4 h 的条件下制得最佳产物。对产物进行 X 射线衍射分析( XRD)、傅里叶红外光谱仪( FTIR Spectrometer)、扫描电镜分析( SEM)和比表面积分析,结果表明所得产物表面积较大,具有表面弱酸性,作为催化剂载体可以提高其表面的贵金属分散度和催化剂的抗积碳能力。

关键词: 纳米γ-Al2 O3;Y改性;燃烧合成法

Abstract: Aluminum nitrate nonahydrate was used as oxidant, the combustion agent glycine was used as reducing agent, yttria nitrate was added as modifiers, the modified nanometer γ-alumina powder was prepared by combustion synthesis. The effects of the process parameters, such as modifier dosage, calcination temperature, calcination time on the final samples were studied. The results show that the optimal process conditions of preparing γ-alumina modified by yttrium with glycine was used as combustion agent, the mole ratio of yttria nitrate, aluminum nitrate nonahydrate is 0. 07∶ 1, the calcinations temperature is 950 ℃, the calcinations time is 4 h. Through X ray diffraction analysis ( XRD ) , Fourier Transform Infrared Spectrometer ( FTIR Spectrometer ) , scanning electron microscopy ( SEM) and specific surface area analysis of the samples, the samples surface area is larger, with weak acid, as a catalyst carrier can improve the precious metal dispersion and catalyst on the surface of the ability of resistance to carbon deposition.

Key words: Aluminum nitrate nonahydrate was used as oxidant, the combustion agent glycine was used as reducing agent, yttria nitrate was added as modifiers, the modified nanometer γ-alumina powder was prepared by combustion synthesis. The effects of the process parameters, such as modifier dosage, calcination temperature, calcination time on the final samples were studied. The results show that the optimal process conditions of preparing γ-alumina modified by yttrium with glycine was used as combustion agent, the mole ratio of yttria nitrate, aluminum nitrate nonahydrate is 0. 07∶ 1, the calcinations temperature is 950 ℃, the calcinations time is 4 h. Through X ray diffraction analysis ( XRD ) , Fourier Transform Infrared Spectrometer ( FTIR Spectrometer ) , scanning electron microscopy ( SEM) and specific surface area analysis of the samples, the samples surface area is larger, with weak acid, as a catalyst carrier can improve the precious metal dispersion and catalyst on the surface of the ability of resistance to carbon deposition.

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