Enhancing CO Capture and Conversion to Formic Acid via a Membrane-Photocatalytic Hybrid System with ZnO-ZnS Heterojunction Catalyst.

A combined approach for CO capture and photoreduction provides a comprehensive solution to address exhaust emissions. This study aims to develop a hybrid system integrating membrane contactor and photocatalytic technology for CO conversion to formic acid by optimizing the synthesis of ZnO-ZnS heterojunction photocatalysts through controlled variations in precursor concentrations and calcination temperatures. The catalysts are characterized to assess their structural and optical properties, photocatalytic activity, stability and reaction kinetics.