Carboxylation and Decarboxylation of Aluminum Oxide Nanoparticles Using Bifunctional Carboxylic Acids and Octylamine

Table 2

Energy dispersive X-ray (EDX) analysis (atom%  ±1.5) of native and carboxylic acid functionalized NPs.

Surface	C	Al	O	N	C : Al
Alumina NP	2.9	30.9	66.1	—	0.09
Lysine NPs	16.2	24.6	56.2	3.0	0.65
p-Hydroxybenzoic acid NPs	31.7	20.5	47.8	—	1.54
Fumaric acid NPs	31.0	20.6	47.9	—	1.50
4-Formylbenzoic acid NPs	4.2	30.1	65.7	—	0.14