Effect of Glucose Concentration on Preparation of Cu2O Semiconductors as a Photocathode in Photoelectrochemical Water Splitting
Publication Date : 20/10/2020
Synthesis of Cu2O semiconductor thin layer as a photocathode in photoelectrochemical water splitting had been done. Before the Synthesis of Cu2O photocathode, on FTO was covered with copper thin film by applying electrodeposition method using a potentiostat. Then the Cu-FTO was covered Cu2O by then reacting with Fehling B solution with varied glucose concentrations (2, 4, and 6 %) . Characterization with XRD, SEM-EDX and UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS) was chosen for Cu2O that gave the highest current density and the most positive onset potential. The results showed photoelectrochemical property revealed the greater concentration of glucose solution, the greater the current density, Cu2O with a concentration of 6% produced the highest current density, namely 0.413 mA/cm2 and onset potential of 0.23 V. The results of X-ray diffraction showed that the sample contained Cu2O crystals with grain size averaged 87.82 nm. The results of SEM characterization of spherical crystalline morphology Cu2O, and EDX results showed the presence of Cu and O elements. The results of UV-Vis DRS showed that the energy band gap of Cu2O was 2.13 eV.
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