Investigation of the CO2 Decomposition Capacity of the TiO2:CuO Heterojunction by Simulation and Experimentation
نویسندگان
1 Faculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology,
2 Faculty of Physics, Hanoi National University of Education, Hanoi, Vietnam
doi
10.22036/ncr.2025.465846.1387چکیده
The photocatalytic characteristics and CO2 decomposition capabilities of the TiO2:CuO heterojunction were examined using modelling and experimental methods. The simulation indicates that the TiO2:CuO heterostructure achieves a peak photocurrent density of 23.6 mA.cm-2 when the thickness of the TiO2 and CuO layer is 250 nm and 500 nm, respectively. The photocurrent density may vary by magnitude three times, from 8.3 mA.cm-2 when the CuO layer is first exposed to light, to 23.6 mA.cm-2 when the TiO2 layer is first exposed to light. The TiO2:CuO heterostructure was synthesized using the conventional hydrothermal method. The XRD investigation indicates the presence of two distinct phases, namely rutile TiO2 and monoclinic of CuO, in the structure. The FE-SEM images reveal a consistent structure size, with a distribution around 700 nm. The TiO2:CuO heterostructure has an enlarged absorption spectrum, reaching the wavelength of 800 nm. The evaluation of the CO2 decomposition was conducted by FTIR spectrum analysis. The presence of a distinct vibration peak at a wavelength of 1390 cm-1 in the FTIR spectrum provides that the study findings demonstrate the capacity to decompose CO2 into fuel using photocatalysis in a 1M NaOH solution.
