Enhanced photocatalytic activity over a novel CuWO4/Cu1−xZnxWO4/ZnWO4hybrid material with sandwiched heterojunction

Ma, Lijing; Su, Jinzhan; Liu, Maochang; Zhang, Longzhou; Li, Yufeng; Guo, Liejin

doi:10.1557/jmr.2016.114

Cited by 7 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the CuWO 4 XRD spectrum, the (0 1 0) and (1 0 0) reflection planes are particularly related to the WO 6 octahedra, while the (1 1 0), (0 1 1) and (1 1 −1) planes are predominately associated with the CuO 6 octahedra . A graphic representation of the interception of such planes in the CuWO 4 and CuWO 4 (Mg 12.5%) crystal structure can be found in Figure S5.…”

Section: Resultsmentioning

confidence: 99%

“…39,40 In the CuWO 4 XRD spectrum, the (0 1 0) and (1 0 0) reflection planes are particularly related to the WO 6 octahedra, while the (1 1 0), (0 1 1) and (1 1 −1) planes are predominately associated with the CuO 6 octahedra. 41 A graphic representation of the interception of such planes in the CuWO 4 and CuWO 4 (Mg 12.5%) crystal structure can be found in Figure S5. A close inspection of Figure 2b suggests that incorporating magnesium mostly alters the CuO 6 octahedra since no significant changes were observed in the (0 1 0) and (1 0 0) reflection peaks.…”

Section: Characterization Of Materials Pristine Cuwo 4 Andmentioning

confidence: 99%

See 1 more Smart Citation

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO₄ Photoanodes Performance

González-Poggini,

Sánchez,

Sheppard

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The photoelectrochemical properties of CuWO 4 (Mg x%) thin-films obtained by solution-based methods are investigated as a function of the material composition. The thin-films are prepared by spin-coating a single precursor solution onto FTO-coated glass substrates, followed by an annealing process at 550 °C. XRD, Raman, XPS, and electrochemical data studies indicate the formation of single-phase CuWO 4 (Mg x%), with Mg 2+ partially substituting Cu 2+ sites. Photoelectrochemical studies under monochromatic illumination show an 88.2% increase in photocurrent responses and a 2-fold increase in charge carriers bulk separation efficiency at 1.0 V vs RHE, upon replacing 2.5% of Cu by Mg. DFT calculations reveal that Mg incorporation rearranges electron density, shifting the position of magnesium toward an axial oxygen atom, increasing the covalent nature of the bond and decreasing the Cu−O bond length. It is proposed that a change in the localization of the electron density away from the sphere of influence of the oxygen atom, and toward the shared space of the covalent bond, leads to better carrier mobility and the generation of higher photocurrents.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Materials Pristine Cuwo 4 Andmentioning

confidence: 99%

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO₄ Photoanodes Performance

González-Poggini,

Sánchez,

Sheppard

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The different intensities for different crystal planes correlate with the dominating facet at the crystal surfaces of the materials, which also correspond to different crystal morphologies in the SEM images in Figure . The crystallization process and thus the preferential formation of particular facets can be influenced by the addition of foreign atoms (such as cations or anions) to the precursor solution. , Thus, the enhanced photoactivity of Cu 45 In 1 Ga 3 W 51 O x and Cu 46 In 2 Ni 2 W 50 O x can also be promoted by the preferential formation of (100) facets that also show lower charge transfer resistance in undoped CuWO 4 …”

Section: Resultsmentioning

confidence: 99%

“…The crystallization process and thus the preferential formation of particular facets can be influenced by the addition of foreign atoms (such as cations or anions) to the precursor solution. 69,70 Thus, the enhanced photoactivity of Cu 45 In 1 Ga 3 W 51 O x and Cu 46 In 2 Ni 2 W 50 O x can also be promoted by the preferential formation of (100) facets that also show lower charge transfer resistance in undoped CuWO 4 . 68 The observed unchanged morphology of Cu 46 In 2 Ni 2 W 50 O (Figure 9M,N) suggests a high stability in alkaline solution, which was further confirmed by photocurrent transients for 30 min (Figure 9O).…”

Section: Structural Analysis Of Active Materialsmentioning

confidence: 99%

Enhanced Photoactivity by Doping of Cu–W Oxide-Based Photoanodes by Trivalent Al³⁺, Ga³⁺, and In³⁺ Ions─A Combinatorial Study

Speldrich,

Gronewold,

Wark

et al. 2023

ACS Appl. Eng. Mater.

View full text Add to dashboard Cite

Metal oxide libraries for the photoelectrochemical oxygen evolution reaction (OER) based on CuWO x with different third and fourth elements were prepared by calcination of inkjetprinted precursor solution in compositional arrays and screening by scanning photoelectrochemical microscopy and scanning electrochemical microscopy in the sample-generation/tip-collection mode. Based on Cu 48 Ga 3 W 49 O x known as an active material from previous studies, the influence of other trivalent metal ions (M 3+ = Al and In) was tested in ternary Cu−M−W metal oxide systems. While Al doping did not have positive effects, Cu 44 In 2 W 54 O x showed photoactivity comparable to that of Cu 48 Ga 3 W 49 O x . The activity of both was surpassed by that of the quaternary oxide system Cu 45 In 1 Ga 3 W 51 O x . Raman spectroscopy, grazing incidence X-ray diffraction (GI-XRD), X-ray photoelectron spectroscopy (XPS), and ultraviolet photoelectron spectroscopy (UPS) reveal no structural changes in the ternary or quaternary hit compositions, irrespective of the used M 3+ dopant. Raman spectroscopy and GI-XRD show a phase-pure triclinic crystal structure similar to that of undoped CuWO 4 . XPS proves the incorporation of trivalent cations (Ga 3+ , In 3+ ). Valence band spectra identified increased n-type character of all hit materials compared to CuWO 4 , which is based on a larger E VBM (at roughly constant band gap) of the doped materials compared to CuWO 4 . Furthermore, quaternary systems combining doping with trivalent group 13 elements (Ga 3+ or In 3+ ) with transition metal cations (Ni 2+ or Co 2+ ) identified Cu 46 In 2 Ni 2 W 50 O x as a material with photoactivity higher than that of Cu 44 In 2 W 54 O x . While the photoactivity and n-type character of Cu 46 In 2 Ni 2 W 50 O x are comparable to those of Cu 45 In 1 Ga 3 W 51 O x , the former composition becomes a promising lead structure for the photoanode material by its considerably increased stability in alkaline solution under illumination.

show abstract

Versatile fabrication and characterization of Cu-doped ZrO2 nanoparticles: enhanced photocatalytic and photoluminescence properties

Gopal

Sambandam

Thirumalai

et al. 2020

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Enhanced photocatalytic activity over a novel CuWO₄/Cu_1−xZn_xWO₄/ZnWO₄hybrid material with sandwiched heterojunction

Abstract: Abstract

Cited by 7 publications

References 27 publications

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO₄ Photoanodes Performance

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO₄ Photoanodes Performance

Enhanced Photoactivity by Doping of Cu–W Oxide-Based Photoanodes by Trivalent Al³⁺, Ga³⁺, and In³⁺ Ions─A Combinatorial Study

Versatile fabrication and characterization of Cu-doped ZrO2 nanoparticles: enhanced photocatalytic and photoluminescence properties

Contact Info

Product

Resources

About

Enhanced photocatalytic activity over a novel CuWO4/Cu1−xZnxWO4/ZnWO4hybrid material with sandwiched heterojunction

Abstract: Abstract

Cited by 7 publications

References 27 publications

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO4 Photoanodes Performance

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO4 Photoanodes Performance

Enhanced Photoactivity by Doping of Cu–W Oxide-Based Photoanodes by Trivalent Al3+, Ga3+, and In3+ Ions─A Combinatorial Study

Versatile fabrication and characterization of Cu-doped ZrO2 nanoparticles: enhanced photocatalytic and photoluminescence properties

Contact Info

Product

Resources

About

Enhanced photocatalytic activity over a novel CuWO₄/Cu_1−xZn_xWO₄/ZnWO₄hybrid material with sandwiched heterojunction

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO₄ Photoanodes Performance

Partial Substitution of Cu Sites by Mg for the Improvement of CuWO₄ Photoanodes Performance

Enhanced Photoactivity by Doping of Cu–W Oxide-Based Photoanodes by Trivalent Al³⁺, Ga³⁺, and In³⁺ Ions─A Combinatorial Study