3.3.5. TGA Analysis

The TGA and DTG curves of *C. pentandra*/Ag-NPs as a function of temperature are shown in Figure 12. The initial peak decomposition of *C. pentandra* /Ag-NPs occurred approximately at ~100 ◦C (5% weight loss) corresponded to the vaporization of absorbed water in the fiber. The DTG curves show the small peak of *C. pentandra*/Ag-NPs decomposition occurred at 188 ◦C (1%). This peak corresponded to the peak of NO3 <sup>−</sup> that is derived from AgNO3 solution. The small peak of NO<sup>−</sup> 3 decomposition indicates the Ag<sup>+</sup> ions were reduced to Ag0. The major DTG curve peak decompositions of *C. pentandra*/Ag-NPs occurred at 349 ◦C (75% of weight loss) corresponding to the cellulose region of the treated *C. pentandra* fiber. This result also shows that the possible mechanism of loading of Ag-NPs into treated *C. pentandra* fiber occurred at the cellulose region. This phenomenon suggests that the Ag-NPs were successfully loaded into the treated *C. pentandra* fiber using AgNO3 as Ag precursor.

**Figure 12.** DTG curves of *C. pentandra*/Ag-NPs a function of temperature.
