Mesoporous graphene oxide-ZnO (GO-ZnO) nanocomposite has been synthesized by GO and ZnO which was prepared by solvothermal method. Power X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) have been used to characterize the structure and morphology of the porous GO-ZnO hybrid. With visible porosity of ZnO and GO-ZnO, N-2 adsorption-desorption measurements and pore size analysis have been investigated and compared. Comparing to ZnO, GO-ZnO showed larger Brunauer-Emmett-Teller (BET) surface area and enhanced ability on capturing CO2 at different temperatures. Several cycles of adsorption-desorption experiments on CO2 have been tested and it proved GO-ZnO to be potential adsorbent material with excellent cycling stability. (C) 2015 Elsevier B.V. All rights reserved.