Influence of the Incorporation of Transition Metals on the Basicity of Mg,Al-Mixed Oxides and on Their Catalytic Properties for Transesterification of Vegetable Oils

Table 1

Lattice parameters of the as-synthesized HTLCs.

Sample	𝑎	𝑐	Crystallite size (Å)	Ionic radius (Å) [1]
HT	3.0536	23.1392	178	Mg^2+ = 0.65; Al^3+ = 0.50
Cu-HT	3.0602	23.3020	124	Cu^2+ = 0.69
Co-HT	3.0596	23.2677	176	Co^2+ = 0.74
Fe-HT	3.0791	23.0999	178	Fe^3+ = 0.64
Cr-HT	—	—	52	Cr^3+ = 0.69