Photochemical oxidation of water with thin AgCl layers

Pfanner, Klaus; Gfeller, Niklaus; Calzaferri, Gion

doi:10.1016/1010-6030(95)04244-x

Cited by 43 publications

(33 citation statements)

References 11 publications

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“…In order to take insight into the oxygen evolution, Chandrasekaran and Thomas in 1983 opened a mechanism exploration work and elucidated that water oxidation by AgCl/Ag + system under irradiation was not catalytic though a similarity between this system and photosynthetic energy storage was existed [112]. However, in 1996, one more time Calzaferri et al carried out a photochemical oxidation of water to O 2 with thin AgCl layer on SnO 2 -coated glass plate in small excess presence of Ag + ions in aqueous solution under different illumination conditions [113]. This work revealed that the role of Ag + ion was to repair the damaged AgCl species during the photochemical oxidation of water, which ensured an intact AgCl composition before and after the reaction.…”

Section: What Is Silver Halide and Its Development In Nanotechnologymentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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The silver halides and their corresponding composites would constitute remarkable photocatalytic systems not only in energy production but also in environmental remediation. The major advantage in these silver halides system is that plasma metal Ag 0 species would be spontaneously generated by silver halides under light irradiation, which play dual roles of expanding light absorption range and charge carriers separation. In this tutorial review, the origin and development of silver halides, synthesis methods, construction of composite structures with other materials, photocatalytic applications, and various and controversial mechanisms are all exhaustively described.

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Section: What Is Silver Halide and Its Development In Nanotechnologymentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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“…With 402 nm light In 0.9 Ni 0.1 TaO 4 , provided with a Ni/NiO catalyst, yielded a quantum efficiency of 0.66% for water splitting [28]. Following up earlier work on photographic AgCl layers [29,30], Calzaferri and co-workers [31] studied AgCl mediated oxygen evolution from water. It is accompanied by a reduction of Ag+ to Ag, which is not entirely reversible as needed to support a water splitting process, but can be observed with green light.…”

Section: The Challenge Of Oxidative Multi-electron Transfer Catalysismentioning

confidence: 98%

Multi-electron transfer catalysis for energy conversion based on abundant transition metals

Tributsch¹

2007

Electrochimica Acta

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“…The hydrogen generation from water in presence of nanocomposite Ag@AgCl/ZnO might follow the below mentioned reaction mechanism, expressed by Eqs. (10) to (18) [57,58]:…”

Section: Terephthalic Acidmentioning

confidence: 99%

“…Similarly, 3D-hierarchical superstructures, concave cubes, and cubes of AgCl, were used as photocatalyst for O 2 generation via water splitting with their activity are 254 mmol g −1 for hierarchical superstructures, 187 mmol g −1 of concave cubic AgCl and 136 mmol g −1 of cubic AgCl in 5 h [17]. The photoactivity of AgCl in presence of Ag + ions, extended from the UV to the visible light region under the process known as self-sensitization, [18,19] which is due to the formation of silver species during the photoreaction, as follows (Eqs. 1-7):…”

Section: Introductionmentioning

confidence: 99%

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Nanocomposite Ag@AgCl/ZnO for efficient hydrogen generation through water splitting

2019

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We had successfully prepared the microwave assisted lotus shaped Ag@AgCl/ZnO nanocomposite (NC) of size 57.72 nm, in aqueous media at 90 °C for 7 min heating. The conventional single pot refluxing method was also used to prepare NCs with spherical shaped nanoparticles of size 59.12 nm at 90 °C heating for 3 h. X-ray diffraction data of the Ag@AgCl/ZnO NCs synthesized by the both methods, confirmed that the nanocomposite crystallized in three phases i.e. face-centered cubic (AgCl), cubic (nanosilver) and wurtzite hexagonal phase (ZnO). Energy dispersive X-rays corresponding to the electron microscopy analysis with their elemental mapping, envisioned the surface morphology and elemental composition i.e., 19% ZnO, 13.79% AgCl, 8.08% Zn and 26.19% Ag in the NC. The Ag@AgCl/ZnO NCs exhibited the visible light harvesting ability with band gap i.e. 3.02 and 2.96 eV with SURS selfsensitization of AgCl. Conventionally made sample and microwave assisted sample emits green and yellow-photoluminescence emissions, respectively. FTIR spectra at different stages of the formation of the nanocomposites, visualized the gradual changes in bonding positions of NCs. We utilized this molecular system as an efficient visible-light harvesting optical devices for water splitting. Conventionally and microwave assisted Ag@AgCl/ZnO samples, librated 6082.9 and 6782.32 μmol H 2 h −1 g −1 , optimum hydrogen in 8 h, respectively, through photocatalytic water splitting under AM 1.5G irradiation.

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Photochemical oxidation of water with thin AgCl layers

Cited by 43 publications

References 11 publications

Regulations of silver halide nanostructure and composites on photocatalysis

Regulations of silver halide nanostructure and composites on photocatalysis

Multi-electron transfer catalysis for energy conversion based on abundant transition metals

Nanocomposite Ag@AgCl/ZnO for efficient hydrogen generation through water splitting

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