Photoelectrochemical properties of FTO/m-BiVO4 electrode in different electrolytes solutions under visible light irradiation

Dip-coating deposition of resistive BiVO4 thin film and evaluation of their photoelectrochemical parameters under distinct sources illumination

“…Previously published papers have dealt with the photocatalytic properties of monoclinic BiVO 4 phase face to the degradation of organic pollutants in aqueous media, when under visible light irradiation [7,[10][11][12][13][14]. Besides partial photocatalytic water splitting reaction has also been accomplished, driving the oxygen evolution by photogenerated holes on valence band [8,[15][16][17][18][19].…”

“…Besides partial photocatalytic water splitting reaction has also been accomplished, driving the oxygen evolution by photogenerated holes on valence band [8,[15][16][17][18][19]. Recently, nanostructured BiVO 4 thin film has been used as photoanode electrode in a photoelectrochemical system [7,10,[20][21][22]. In the photoelectrochemical configuration system, the electrochemical potential applied to the working electrode forces the electron flow, which in this case is photogenerated by means of visible light irradiation, towards the counter-electrode, preventing the fast electron-hole recombination-back process [7,10].…”

“…Recently, nanostructured BiVO 4 thin film has been used as photoanode electrode in a photoelectrochemical system [7,10,[20][21][22]. In the photoelectrochemical configuration system, the electrochemical potential applied to the working electrode forces the electron flow, which in this case is photogenerated by means of visible light irradiation, towards the counter-electrode, preventing the fast electron-hole recombination-back process [7,10]. The effect of photogenerated charge carriers separation with high efficiency is the key to the high quantum efficiency of the photoanode, leading to an improved photoelectrochemical performance of system.…”

“…Appropriate excitation energy, which in this case must be about the band gap energy, may lead to stable photo-induced current density. The electrolyte solution is a fundamental parameter to investigate the decay profile and response time of photo-induced current density [7,10]. Some previously published papers [7,10,16] show that the BiVO 4 thin film electrode is more electroactive in sodium sulfate electrolyte solution because ions SO 4 −2 are more easily oxidized than other electrolyte solutions and water molecules.…”

“…The electrolyte solution is a fundamental parameter to investigate the decay profile and response time of photo-induced current density [7,10]. Some previously published papers [7,10,16] show that the BiVO 4 thin film electrode is more electroactive in sodium sulfate electrolyte solution because ions SO 4 −2 are more easily oxidized than other electrolyte solutions and water molecules. In this context, this paper deals with the investigation of photoelectrochemical properties of resistive monoclinic BiVO 4 nanocrystalline thin films deposited on conducting fluorine-doped tin oxide (FTO) substrate through the SCS technique along with the dip-coating deposition process.…”