A nano-tin oxide grafted natural-hydroxyapatite photocatalyst was fabricated using a greener approach involving sequential application of solar-type and ultrasound-wave energy (STUWE). The protocol provided 76 % higher surface area, 59 % more surface acidity, and 15 % reduced band gap energy than conventionally prepared photocatalysts (CPPCs). The efficacy of the STUWE-promoted photocatalyst (STUWEPC) was optimized for maximization of 2-ethylhexyl acetate yield (97 %) employing an energy-efficient solar-type/ultrasound synergistic batch reactor. A considerably lower activation energy, estimated by Langmuir-Hinshelwood kinetics, and higher reusability characteristics (upto 8 recycles) of the STUWEPC than CPPC highlights the superiority of the STUWE procedure.