CuWO4|MnWO4 heterojunction thin film with improved photoelectrochemical and photocatalytic properties using simulated solar irradiation

Optimizing the synergistic effect of CuWO4/CuS hybrid composites for photocatalytic inactivation of pathogenic bacteria

“…The E cb and E vb values of CuWO 4 and CuS were estimated using the following expressions: 62 E vb = χ − E 0 + 0.5 E g E cb = E vb − E g where E vb is the valence band (VB) edge potential, the E 0 value is constant 4.5 eV versus a normal hydrogen electrode (NHE), E cb is the conduction band (CB) edge potential, E g is the bandgap of the semiconductor, and χ is the geometric mean of the electronegativities of atoms constituting the semiconductor. The VB position and CB position are estimated to be +2.9 eV and 0.50 eV, respectively for CuWO 4 , 63,64 whereas these values are +1.67 eV and −0.13 eV respectively for CuS. 65–67…”

“…where E vb is the valence band (VB) edge potential, the E 0 value is constant 4.5 eV versus a normal hydrogen electrode (NHE), E cb is the conduction band (CB) edge potential, E g is the bandgap of the semiconductor, and χ is the geometric mean of the electronegativities of atoms constituting the semiconductor. The VB position and CB position are estimated to be +2.9 eV and 0.50 eV, respectively for CuWO 4 , 63,64 whereas these values are +1.67 eV and −0.13 eV respectively for CuS. [65][66][67] Under visible light irradiation, CuWO Both CuWO 4 and CuS can generate a series of photoinduced reactive species including ˙OH and ˙O2…”

Facile Synthesis and Characterization of Novel Carbon Nanofiber-Doped MWO4 (M–Mn, Co, Ni, Mn–Co, Mn–Ni, Ni–Co)-Based Nanostructured Electrode Materials for Application in Electrochemical Supercapacitors and Photoelectrochemical Water Splitting

“…35,36 As a result, improved photoinduced electron and hole separation and transit efficiency can be anticipated, improving photocatalytic performance. 37 Recent investigations of the use of MWO 4 and its composites in PEC water splitting are as follows. Anis et al 38 prepared electrospun WO 3 /NiWO 4 composite nanofibers that were used for PEC performance under visible light irradiation at 1.6, 1.8, and 2.0 V with reference to an Ag/AgCl electrode in a 0.5 M H 2 SO 4 electrolyte.…”

“…The resultant photocurrent was 5 and 2 orders of magnitude higher compared to that of the parent BiVO 4 and BiVO 4 /SnO 2 , respectively. CuWO 4 , MnWO 4 , and FTO/CuWO 4 −MnWO 4 were prepared as type II heterojunction thin films by Lima et al 37 In this study, we developed CNF-doped MWO 4 (M−Mn, Co, Ni, Mn−Co, Mn−Ni, Ni−Co) nanohybrid materials using a simple hydrothermal process. The physicochemical and morphological properties of the synthesized materials were investigated using appropriate analytical techniques.…”

“…However, electron–hole recombination and poor electron transport are concerns with MWO 4 ; in order to solve these problems, it is necessary to combine MWO 4 with effective electron conductors such as carbon nanofibers (CNFs). CNFs offer several advantages over other carbon materials such as being flexible, conductive, and stable in corrosive conditions, having good access to electrolytes and high electronic conductivity along longitudinal directions, and offering large surface areas. , As a result, improved photoinduced electron and hole separation and transit efficiency can be anticipated, improving photocatalytic performance . Recent investigations of the use of MWO 4 and its composites in PEC water splitting are as follows.…”