Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Wang, Yunfang; Zhang, Xue; Liu, Jianxin; Wang, Yawen; Duan, Donghong; Fan, Caimei

doi:10.1016/j.mssp.2015.07.036

Cited by 21 publications

(8 citation statements)

References 35 publications

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“…The bandgap of the pristine meso -WO 3 photoanode was around 2.70 eV, while that of the N-CQD-7/ meso -WO 3 photoanode was 2.63 eV. Moreover, the conduction band (CB) and valence band (VB) of the meso -WO 3 and N-CQD-7/ meso -WO 3 photoanodes were assessed using the following equation [47]:E CB = χ − E e + 0.5 E g ; E VB = E CB + E g where χ represents the absolute electronegativity of the semiconductor, with the χ value of WO 3 being 6.59 eV [48]; E e is the energy of free electrons on the hydrogen scale (about 4.5 eV). Thus, the E CB and E VB of WO 3 were assessed to be +0.74 eV and +3.44 eV for meso -WO 3 respectively.…”

Section: Resultsmentioning

confidence: 99%

Mesoporous Tungsten Trioxide Photoanodes Modified with Nitrogen-Doped Carbon Quantum Dots for Enhanced Oxygen Evolution Photo-Reaction

et al. 2019

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Nanostructured photoanodes are attractive materials for hydrogen production via water photo-electrolysis process. This study focused on the incorporation of carbon quantum dots doped with nitrogen as a photosensitizer into mesoporous tungsten trioxide photoanodes (N-CQD/meso-WO3) using a surfactant self-assembly template approach. The crystal structure, composition, and morphology of pure and N-CQD- modified mesoporous WO3 photoanodes were investigated using scanning electron and transmission microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Due to their high surface area, enhanced optical absorption, and charge-carrier separation and transfer, the resulting N-CQD/meso-WO3 photoanodes exhibited a significantly enhanced photocurrent density of 1.45 mA cm−2 at 1.23 V vs. RHE under AM 1.5 G illumination in 0.5 M Na2SO4 without any co-catalysts or sacrificial reagent, which was about 2.23 times greater than its corresponding pure meso-WO3. Moreover, the oxygen evolution onset potential of the N-CQD/meso-WO3 photoanodes exhibited a negative shift of 95 mV, signifying that both the charge-carrier separation and transfer processes were promoted.

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Section: Resultsmentioning

confidence: 99%

Mesoporous Tungsten Trioxide Photoanodes Modified with Nitrogen-Doped Carbon Quantum Dots for Enhanced Oxygen Evolution Photo-Reaction

et al. 2019

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“…However, when the low-temperature synthesis is performed activation of photocatalysts may be needed. For instance, photocatalytic activity of TiO 2 /SiO 2 hybrid thin films was increased two times after applied phototreatment (UV irradiation) which was attributed to partial photocatalytic decomposition of CH 3 groups leading to formation of porosity [101].…”

Section: Activation and Reuse Of Photocatalystsmentioning

confidence: 99%

“… alkaline treatment with NaOH and NH 4 OH [107];  thermal regeneration [7];  photocatalytic regeneration (exposure to UV light in water) [101];  oxidation of intermediates adsorbed on the surface of photocatalyst by H 2 O 2 /UV treatment [107];  deionized water [108].…”

Section: Activation and Reuse Of Photocatalystsmentioning

confidence: 99%

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Titanium dioxide–based nanomaterials for photocatalytic water treatment

Levchuk

2020

Advanced Water Treatment

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“…In seawater, the peak at 935.25 eV (Cu 2p 3/2 ) is associated with CuO. 30 The peaks at 952.50 eV (Cu 2p 1/2 ) and 932.00 eV (Cu 2p 3/2 ) are assigned to Cu 2 O. [31][32][33] In aerated chloride media, the main corrosion process of bronze is the dissolution of copper to form the dichlorocuprous anion complex (CuCl 2 À ) and oxide (Cu 2 O).…”

Section: Friction and Wear Propertiesmentioning

confidence: 99%

The effects of the main components of seawater on the tribological properties of Cu–9Al–5Ni–4Fe–Mn alloy sliding against AISI 52100 steel

et al. 2016

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A high strength and wear-resistance nickel-aluminum bronze alloy was successfully prepared by hot-pressing sintering. The tribological performances of it sliding against AISI 52100 steel were studied in distilled water, seawater, divalent salt solutions and monovalent salt solutions. The effects of the main components of seawater on the tribological properties were first investigated. The results show that Cu-9Al-5Ni-4Fe-Mn alloy has a lower friction coefficient and wear rate in seawater and divalent salt solutions. The Cl À and SO 4 2À adsorbed by the surface can accelerate corrosion and promote the formation of Cu 2 O, Al 2 O 3 , FeOOH and Fe 2 O 3 , which has an influence on the tribological performances. The distribution of CaCO 3 and Mg(OH) 2 on the surface also plays an important role in the reduction of the friction coefficient and wear rate. In addition, many substances transfer from the alloy to the steel surface and form a transfer layer during the friction process.

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Facile regeneration and photocatalytic activity of CuO-modified silver bromide photocatalyst

Cited by 21 publications

References 35 publications

Mesoporous Tungsten Trioxide Photoanodes Modified with Nitrogen-Doped Carbon Quantum Dots for Enhanced Oxygen Evolution Photo-Reaction

Mesoporous Tungsten Trioxide Photoanodes Modified with Nitrogen-Doped Carbon Quantum Dots for Enhanced Oxygen Evolution Photo-Reaction

Titanium dioxide–based nanomaterials for photocatalytic water treatment

The effects of the main components of seawater on the tribological properties of Cu–9Al–5Ni–4Fe–Mn alloy sliding against AISI 52100 steel

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