A comparative study of humidity sensing and photocatalytic applications of pure and nickel (Ni)-doped WO3 thin films

Ramkumar, S. Manian; Rajarajan, G.

doi:10.1007/s00339-017-0983-5

Cited by 42 publications

(17 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak at B964 cm À1 is associated with the WQO stretching vibration, and the peak at B1396 cm À1 is attributed to the bending vibration in W-OH. 39 Significantly, the absence of any peaks originating from PVP indicates complete removal during the preparation of the WF sample.…”

Section: Ftir and Raman Study Of Wo 3 Particle And Fiber Samplesmentioning

confidence: 99%

Some interesting insights into the acetone sensing characteristics of monoclinic WO₃

et al. 2023

View full text Add to dashboard Cite

show abstract

Section: Ftir and Raman Study Of Wo 3 Particle And Fiber Samplesmentioning

confidence: 99%

Some interesting insights into the acetone sensing characteristics of monoclinic WO₃

et al. 2023

View full text Add to dashboard Cite

show abstract

“…It's also noted that the PL emission peak slightly shifts towards a higher wavelength (redshift). This may be due to the increase in Ni 3+ ions which act as a conducting center and reduces the E g [27]. From the PL emission spectra, the addition of NW4 NCs indicates an effective carrier extraction and reduced recombination [37].…”

Section: Photoluminescencementioning

confidence: 99%

“…Then the oxidative species degrade the organic pollutant MB into small molecules like CO 2, H 2 O, etc. To prevent the recombination of photoinduced electron-hole pairs, structure, size, and E g play an important role [27]. The K app value of PW and NW4 NCs is 0.02249 and 0.02266 respectively.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Synergistic Effect of Nickel on Tungsten Oxide Hydrate (WO3.H2O) as Photoanode for Dye-Sensitized Solar cell

Manimekalai

Parimaladevi

Umadevi

2021

Preprint

View full text Add to dashboard Cite

Tungsten oxide hydrate (PW) and Nickel tungsten oxide nanocomposites (NW NCs) namely NW1, NW2, NW3 and NW4 were successfully synthesized by the hydrothermal method. The synthesized NCs were characterized using advanced techniques such as X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), UV–visible spectroscopy and Photoluminescence (PL). XRD pattern shows the formation of face-centered cubic phase for PW and monoclinic/orthorhombic phase for NW respectively. The nanoflakes like morphology for NW NCs were confirmed by SEM. The MB dye was successfully degraded using NW4 NCs with a rate constant of 0.02266 /minute. The photovoltaic performance of the photoanodes with various weight percentages (wt%) of Ni was measured by recording the photocurrent-photovoltaic curves. The result indicated that NW4 NCs exhibited the best power conversion efficiency (PCE) with high short circuit current density (Jsc) and open-circuit voltage (Voc). This enhanced photocatalytic and photovoltaic performance of NWNCs may be due to the visible light-harvesting, increased dye loading capacity and reduced photoelectron recombination.

show abstract

“…Doping of WO 3 with nickel improves the humidity sensing compared to neat WO 3 . Attributed to a greater number of electrons donated by Ni atoms, higher surface area, and smaller bandgap energy, Ni-doped WO 3 has a faster response, higher sensitivity, and greater stability than pure WO 3 [20]. WO 3 decorated with palladium nanoparticles on the surface can be used as an improved and reusable gas sensor for NH 3 [21].…”

Section: Introductionmentioning

confidence: 99%

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

Simon

Savitsky

Mülhaupt

et al. 2021

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

We report for the first time the combination of WO3 sensing elements with a non-noble metal–carbon composite, namely a nickel metal nanoparticle–carbon composite (Ni@rGO). Previous work with WO3 had used either NiO (as part of the WO3 lattice), solely carbon, Pd-surface decorated WO3 (Pd@WO3), or Pd or Pt@carbon@WO3. We demonstrate the gas response for pure WO3, rGO/WO3 and Ni@rGO/WO3 sensing elements towards NO2 and acetone in air as well as towards CO in N2. The addition of 0.35 wt % Ni@rGO composite to WO3 enables the increase of the sensory response by more than 1.6 times for NO2 vapors. The gas response towards acetone using 0.35 wt % Ni@rGO/WO3 composite was 1.5 times greater for 3500 ppm than for 35,000 ppm acetone. For 0.35 wt % Ni@rGO/WO3 composite and CO gas, a response time (T res) of 7 min and a recovery time (T rec) of 2 min was determined.

show abstract

A comparative study of humidity sensing and photocatalytic applications of pure and nickel (Ni)-doped WO3 thin films

Cited by 42 publications

References 22 publications

Some interesting insights into the acetone sensing characteristics of monoclinic WO₃

Some interesting insights into the acetone sensing characteristics of monoclinic WO₃

Synergistic Effect of Nickel on Tungsten Oxide Hydrate (WO3.H2O) as Photoanode for Dye-Sensitized Solar cell

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

Contact Info

Product

Resources

About

A comparative study of humidity sensing and photocatalytic applications of pure and nickel (Ni)-doped WO3 thin films

Cited by 42 publications

References 22 publications

Some interesting insights into the acetone sensing characteristics of monoclinic WO3

Some interesting insights into the acetone sensing characteristics of monoclinic WO3

Synergistic Effect of Nickel on Tungsten Oxide Hydrate (WO3.H2O) as Photoanode for Dye-Sensitized Solar cell

Nickel nanoparticle-decorated reduced graphene oxide/WO3 nanocomposite – a promising candidate for gas sensing

Contact Info

Product

Resources

About

Some interesting insights into the acetone sensing characteristics of monoclinic WO₃

Some interesting insights into the acetone sensing characteristics of monoclinic WO₃

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing