Kayode Adesina Adegoke, Muzaffar Iqbal, Hitler Louis, Saad Ullah Jan, Anam Mateen, and Olugbenga Solomon Bello , Trans., “Photocatalytic Conversion of CO2 Using ZnO Semiconductor by Hydrothermal Method”, Pak. J. Anal. Environ. Chem., vol. 19, no. 1, pp. 1 – 27, Jun. 2018, doi: 10.21743/pjaec/2018.06.01.