| Table I. Composition analysis. Elemental wt % of N and C were determined by CHN analysis. Fe wt % was determined by the TG-DTA on the basis of final product Fe2O3 at 600°C. H2O wt % was measured by TG-DTA using weight loss before 100°C. Theoretical weight loss is the value of the loss from the intercalculated FeOOH to Fe2O3. Experimental weight loss was determined by the TG-DTA on the basis of final product Fe2O3 at 600°C. | |||
| N (wt %) | C (wt %) | Fe (wt %) | H2O (wt %) |
| 3.1145 | 2.12325 | 45.6945 | 8.9008 |
| Chemical formula | Calculated weight loss (wt %) | Expt. weight loss (wt %) | |
| FeO(OH)0.29(NO3)0.27(CO3)0.22·0.6H2O | 32.1 | 34.7 | |