Fig. 1. Chemical structure of ionic HAN.
Fig. 2. IR spectrograms of used chemicals and HAN focusing on N-H functionalities.
Fig. 3. IR spectra of the used chemicals and prepared HAN focusing on N-O functionalities.
Fig. 4. IR peak spectra of HAN depending on its pH.
Fig. 5. Thermal properties of HAN in terms of its pH by using TGA.
Table 1. Synthesized ionic HAN compounds according to nitric acid volume
Table 2. IR frequencies of N-H functionalities for HAN and reference compounds
Table 3. IR frequencies of N-O functionalities for HAN and reference compounds
Table 4. Quantitative contents of NO3- in prepared HAN solution
Table 5. Density and content according to pH change of HAN
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