Synthesis of Oval-Shaped Bi 2 Al 4 O 9 Nanoparticles and Their Applications for the Degradation of Acid Green 25 and as Fuel Additives.

The present study was designed to synthesize an oval-shaped bimetallic bismuth aluminate (Bi 2 Al 4 O 9 ) nanoparticles through a solvothermal approach. The resulting structure and morphology of synthesized materials were characterized through X-ray diffraction and scanning electron microscopy. The catalytic performance of Bi 2 Al 4 O 9 was investigated using acid green 25 (AG-25) as the model dye. The effect of various parameters like catalyst dose, H 2 O 2 concentration, and temperature on dye degradation was studied. The Bi 2 Al 4 O 9 nanocomposite exhibited the maximum removal of 95% within 50 min at 0.3 M H 2 O 2 concentration, 0.05 mg/mL catalyst dose, and 315 K temperature. The photocatalytic removal of AG-25 followed pseudo-first-order kinetics. The thermodynamics study exposed that thermal catalytic degradation is a spontaneous, endothermic, as well as entropy-driven reaction that moves in the forward direction at the higher temperatures. The Bi 2 Al 4 O 9 composite was further applied as fuel additives in order to study combustion and physical characteristics of the modified fuel. The efficacy of modified fuel was studied by investigating the fuel parameters at different Bi 2 Al 4 O 9 dosages. Results revealed that synthesized NPs are excellent photocatalysts and could possibly be used for the removal of toxic pollutants.