Structural comparison between samples of hydrotalcite-like materials obtained from different synthesis route

Química Nova

Farias, Stephane B. P. de¹  Abreu, Heitor A. de¹  Chiaro, Sandra S. X.¹  Diniz, Renata¹  PETROBRAS, Rio de Janeiro, Brasil¹  Universidade Federal de Minas Gerais, Belo Horizonte, Brasil¹  Chagas, Luciano H.¹  Leitão, Alexandre A.¹  Universidade Federal de Juiz de Fora, Juiz de Fora, Brasil¹  Mussel, Wagner N.¹  Speziali, Nivaldo L.¹ 

关键词: layered double hydroxides;    catalysts supports;    Rietveld refinement.;   

DOI  :  10.1590/S0100-40422012000600008

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Three samples of hydrotalcite-like materials (HTC) were synthesized and their structural characteristics were compared with two HTCs obtained commercially. Thermal analyses, FT-IR, PXRD and textural analyses were used to investigate the structural differences between commercial and synthetic samples. Particularly, the memory effect was observed at temperature higher than 600 ºC. The Rietveld refinements were obtained with expressive accuracy and the statistical parameters of goodness of fit are quite satisfactory. In conclusion, the procedures adopted in synthesis of HTC produced crystalline materials with high surface area materials.

【 授权许可】

Unknown