TiO<sub>2</sub>-ZnO Catalyst: A New Composite For Selective Catalytic Reduction of NO<sub>x</sub> with NH<sub>3</sub>

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Investigations have underscored the pivotal role of NOx gases in the formation of smog and acid rain, posing threats to human health and ecosystems. Selective Catalytic Reduction (SCR) has emerged as a promising strategy for curtailing NOx emissions. SCR involves the catalytic conversion of nitrogen oxides into benign nitrogen and water vapour, thereby offering a viable approach. In this study, a new composite of low-temperature selective catalytic reduction (LT-SCR) catalyst is synthesized by impregnating ZnO onto TiO2 ceramic substrate. The introduction of ZnO not only provides a high surface area but also results in the formation of a catalyst. This research presents the outcomes of an investigation involving a range of catalysts employed in SCR, including a composite catalyst composed of titanium dioxide and zinc oxide. The objective is to evaluate the composite catalyst's capacity to reduce pollutants characterized by observable NOX content. The catalysts, synthesized through the sol-gel processing technique, are characterized by XRD and SEM to ascertain their suitability for catalytic applications. A comprehensive analysis concludes that the laboratory-synthesized samples exhibit acceptable purity, possess a crystalline structure, and hold potential as catalysts.