Er calcination at 600 C. Following calcination at 700 C, transformation from flake-likeMaterials 2021, 14,changes following calcination at higher temperatures. At 500 , hematite showed the formation of uniform flake-like hexagonal shape. The particle size histogram exhibited that a narrow distribution with the average size was determined in between 1 . When the calcination temperature was elevated to 600 , the uniformity in the flake-like hexagonal structure was deteriorated, with apparent structural disintegration to form smaller sized 6 of 17 aggregates. Nonetheless, the flake-like hexagonal structures had been still visible and also the size was improved to 4 . The presence of F127 and Seclidemstat Description gelatin as template was responsible to improve the structural stability of iron oxide in an effort to preserve the flake-like hexagonal structure soon after calcination was . Following calcination at 700 , transformation from hexagonal structure to cubeat 600observed, plus the size lowered to 1 . Within the Ethyl Vanillate Inhibitor synthesis offlake-like hexagonal structure tocube significant for the formation of bonds1 . In iron oxide, calcination at 500 C is was observed, plus the size decreased to involving the theoxide grains iron oxide, calcination at 500 is very important for the formation of bonds iron synthesis of [34,35]. Having said that, calcination at 700 C was essential to take away carbon in between though the grains [34,35]. Nonetheless, calcination at 700 flake-like structure impurities,the iron oxide morphology was transformed from hexagonalwas significant to eliminate carbon impurities, while the morphology was transformed from hexagonal into cubic structure. TEM evaluation was also carried out on iron oxide immediately after calcination for flake-like structure into cubic structure. TEM evaluation was also carried out on iron oxide five h at 500 C (Figure four). The TEM image showed a uniform morphology of iron oxide following calcination for five h at 500 (Figure four). The TEM image showed a uniform morpholparticles that have been intercalated to kind a lengthy network. ogy of iron oxide particles that were intercalated to kind a extended network.Figure three. SEM and histogram of particle size distribution of iron oxide synthesized soon after calcination for 5 h at 500 (a,d), Figure 3. SEM FOR PEER Critique Supplies 2021, 14, x and histogram of particle size distribution of iron oxide synthesized right after calcination for five h at 500 C (a,d),of 18 7 600 (b,e), and 700 (c,f). 600 C (b,e), and 700 C (c,f).Figure 4. TEM evaluation of iron oxide following calcination for 5 h at 500 . Figure four. TEM evaluation of iron oxide right after calcination for 5 h at 500 C.Characterization final results obtained from XRD, SEM, and TEM analysis supplied inCharacterization outcomes obtained from XRD, SEM, and TEM evaluation supplied insight sight into the stability of -Fe2O3 morphology. While -Fe2O3 wascalcined at 500 in in to the stability of -Fe2 O3 morphology. Even though -Fe2 O3 was calcined at 500 C so as to get rid of the template in the course of synthesis, the flake-like structures have been retained order to take away the template in the course of synthesis, the flake-like structures had been retained and stable up to 600 . The potential to direct the morphology strongly relied on the presence of F127 and gelatin to form a steady micellar structure [22]. The OH functional groups in the copolymer block F127 and NH around the gelatin have a robust affinity for interacting together with the iron precursor, to ensure that these two molecules had been in a position to direct the structure with the material [22]. Gelatin consists of carboxyl, amin.