In this paper, we present the fabrication of Ln₂Zr₂O₇ (Ln = Nd, Pr) ceramic nanostructures with green tea extract (GrTeEx) as novel and efficacious fuel through easy and repeatable route as well as their application in propane-selective catalytic reduction of NO_x process (propane-SCR-NO_x), for the first time. As-fabricated samples with green tea extract have been examined via diverse kind of techniques. Our outcomes represented the successful production of the pure nanostructured Ln₂Zr₂O₇ (Ln = Nd, Pr) in presence of green tea extract as novel and efficacious fuel. Moreover, the nanostructured samples can be utilized as a potential novel kind of catalysts with desirable efficiency for propane-SCR- NO_x. It was found that Pr₂Zr₂O₇ denoted better performance than Nd₂Zr₂O₇ for NO_x abatement so that the conversion of NO_x in to N₂ for Pr₂Zr₂O₇ was 67% and for Nd₂Zr₂O₇ was 56%. Also the concentration of CO production for Pr₂Zr₂O₇ which is inevitable and undesirable product in SCR-NOx process with hydrocarbons such as propane was lower than Nd₂Zr₂O₇.