The dataset contains experimental data of the preparation of a photocatalytic membrane and its application in CO2 capture and utilization. The experiments were carried out in the Tang’s and Lan’s groups at the Department of Chemical Engineering, University College London during June-November 2020. Specifically, the data shows the preparation of cucurbit[6]uril and copper oxide which were empolyerd to prepare the photocatalytic membrane together with functional polymers. Preliminary results of the photocatalytic membrane for CO2 capture and utilization were also included. Funded by UKCCSRC 2020 Flexible Funding Call.