Production Potential From Basic Bismuth Nitrate With Organic Waste Conjugation On Irradiation

Utilizing organic waste in photocatalytic processes can lead to the production of hydrogen as a clean energy source. Basic bismuth nitrate's (BBN) semiconductor properties, particularly its favorable oxidation characteristics, served as the driving force behind the choice of the photocatalyst. This can be attributed to the valence band (VB) of BBN having a higher positive potential compared to water. The process of assessing the quality of waste generated from beverages involves the careful selection of catalysts, namely black tea (BT), green tea (GT), and oolong tea (OLT), which represent tea trash. Additionally, arabica (AR) and robusta (RB) are chosen to represent coffee waste. The UV-Vis characterization was performed in order to observe the light absorption spectrum of each catalyst. A computational investigation was conducted utilizing Density Functional Theory (DFT) and B3LYP orbital simulation methods to ascertain the overall energy of the Lowest Unoccupied Molecular Orbital (LUMO) in both the BBN and organic catalyst. The presence of a narrow energy bandgap in organic waste materials such as BT, GT, OLT, AR, and RB suggests the occurrence of reactive charge transfer. The disparity in band edges between the negative band and BBN can elucidate the propensity for cleaving carbon organic waste bonds as a consequence of the formation of radical molecules. Within the category of organic waste, a phenomenon occurs wherein the position of electrons undergoes a transition from electrophilic to nucleophilic, leading to the liberation of hydron. This is supported by the comparison between the band gap values obtained from the UV-Vis optical test results and the modeling findings, which exhibit a relatively small discrepancy. The observed energy levels can be attributed to the endothermic potential resulting from the absorption of photons. The capacity for oxidation and reduction of organic waste by the utilization of basic bismuth nitrate.