Effects of the addition of mango residue on solution combustion synthesis of iron oxides

Solution Combustion Synthesis of Environmentally Friendly Magnetic Composites Based on Iron Oxide and Mango (Mangifera Indica L.) waste for UV and Solar - Driven Heterogeneous Photocatalysis

“…However, since there are also oxidizing gases due to the combustion step, especially NOx, the magnetite phase is partially oxidized to maghemite. This effect agrees with investigations from other studies [36,42,[44][45][46]. However, due to the complexity of the systems where there is biomass decomposition, there is no way to predict the proportions of the phases in the materials obtained.…”

“…Another difference observed in the samples where there was addition of residue was the decrease of the peak referring to the combustion event, in the temperature around 200°C. This may be related to the Combustion event from exothermic origin, occurring simultaneously with the thermal decomposition event of the cellulosic and lignin derivatives of the residue, from endothermic origin [26,36]. Thus, the energy of the Combustion event, in balance with the energy of the decomposition process, makes the resulting event barely observable in the DTA curve.…”

“…One of the most important parameters is the fuel/oxidant ratio, according to Jain et al [34], who describes that the reaction products are directly dependent on this ratio, which can affect not only the oxide phase formed, but also some characteristics, such as crystal size, porosity, surface area, magnetization, among others [35]. The insertion of carbonaceous material is little explored in combustion-based syntheses, especially with in natura residues of carbonaceous materials [36,37], as well as its advantages in applications such as heterogeneous photocatalysis. Thus, this work presents the synthesis of composites based on iron oxide and carbonaceous material from mango peel, in application in heterogeneous photocatalysis with UV and solar radiation.…”