Advances in hydrogen sulphide utilisation: phase transfer catalysed selective reduction of nitronaphthalene

A series of silver sulfide composites were prepared via the hydrothermal method with L-cysteine and AgNO 3 in water at a range of Lcysteine/AgNO 3 molar ratio of 0.5−8. The prepared Ag/Ag x S materials were consisted of Ag, Ag 2 S, Ag 2 S 2 , and Ag 2 S n species as confirmed by XRD, TEM, and XPS. The Ag/Ag x S composites are active for the photocatalytic reduction of aromatic nitro compounds under the visible light irradiation. The composition of the stoichiometric Ag 2 S, the nonstoichiometric Ag 2 S 2 and Ag 2 S n , and metallic Ag species affected the photocatalytic performances largely. When more nonstoichiometric Ag 2 S 2 and Ag 2 S n presented on the surface, the absorption in the visible (vis) light region was enhanced remarkably and presented a blue shift, leading to a bigger band gap energy value (E g ) and higher cathodic conduction band edge potential (E CB ), which promoted the formation of photogenerated electrons and inhibited the combination of photoelectrons and holes. When the more Ag 0 presented on the surface, the more photogenerated electrons were transferred from the conduction band of Ag x S to Ag 0 , preventing the combination of photoelectrons and holes. Thus, the photocatalytic performances of the Ag/Ag x S composites could be controlled by varying the surface composition.

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“…A photoinduced hole in the VB of Ag/Ag x S-1 could oxidize a HS – ion to give a free radical as reported in the literature: …”

Section: Resultsmentioning

confidence: 87%

“…Compared with S 2– , S 2 2– is more active in the reduction of NB to AN in H 2 O, − while when Na 2 S 2 O 3 was used as the sacrificial agent, the reaction did not occur with any product detected (Table , entry 5): …”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/Ag_xS Composites under Visible Light Irradiation

2021

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“…H 2 S can be produced from natural sources such as volcanic eruptions and anaerobic bacterial reduction of sulfur as well as anthropogenic sources such as petroleum extractions, coal mines, natural gas, and biogas processing industries [18,19]. It has low threshold, and humans, having highly developed olfaction, can discern as low as 1 µM of Na 2 S in solution [20].…”

Section: Multifunctional Capacity Of H 2 Smentioning

confidence: 99%

Hydrogen Sulfide: A Robust Combatant against Abiotic Stresses in Plants

et al. 2021

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Hydrogen sulfide (H2S) is predominantly considered as a gaseous transmitter or signaling molecule in plants. It has been known as a crucial player during various plant cellular and physiological processes and has been gaining unprecedented attention from researchers since decades. They regulate growth and plethora of plant developmental processes such as germination, senescence, defense, and maturation in plants. Owing to its gaseous state, they are effectively diffused towards different parts of the cell to counterbalance the antioxidant pools as well as providing sulfur to cells. H2S participates actively during abiotic stresses and enhances plant tolerance towards adverse conditions by regulation of the antioxidative defense system, oxidative stress signaling, metal transport, Na+/K+ homeostasis, etc. They also maintain H2S-Cys-cycle during abiotic stressed conditions followed by post-translational modifications of cysteine residues. Besides their role during abiotic stresses, crosstalk of H2S with other biomolecules such as NO and phytohormones (abscisic acid, salicylic acid, melatonin, ethylene, etc.) have also been explored in plant signaling. These processes also mediate protein post-translational modifications of cysteine residues. We have mainly highlighted all these biological functions along with proposing novel relevant issues that are required to be addressed further in the near future. Moreover, we have also proposed the possible mechanisms of H2S actions in mediating redox-dependent mechanisms in plant physiology.

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New fluorescent probes based on gallium(III) corrole complexes for the recognition of hydrogen sulfide: A journey from solution to intracellular site

et al. 2023

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Advances in hydrogen sulphide utilisation: phase transfer catalysed selective reduction of nitronaphthalene

Abstract: Phase transfer catalysed selective Zinin reduction of 1-nitronaphthalene by hydrogen sulphide laden aqueous N-methyldiethanolamine.

Cited by 4 publications

References 53 publications

Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/Ag_xS Composites under Visible Light Irradiation

Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/Ag_xS Composites under Visible Light Irradiation

Hydrogen Sulfide: A Robust Combatant against Abiotic Stresses in Plants

New fluorescent probes based on gallium(III) corrole complexes for the recognition of hydrogen sulfide: A journey from solution to intracellular site

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Advances in hydrogen sulphide utilisation: phase transfer catalysed selective reduction of nitronaphthalene

Abstract: Phase transfer catalysed selective Zinin reduction of 1-nitronaphthalene by hydrogen sulphide laden aqueous N-methyldiethanolamine.

Cited by 4 publications

References 53 publications

Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/AgxS Composites under Visible Light Irradiation

Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/AgxS Composites under Visible Light Irradiation

Hydrogen Sulfide: A Robust Combatant against Abiotic Stresses in Plants

New fluorescent probes based on gallium(III) corrole complexes for the recognition of hydrogen sulfide: A journey from solution to intracellular site

Contact Info

Product

Resources

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Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/Ag_xS Composites under Visible Light Irradiation

Photocatalytic Reduction of Aromatic Nitro Compounds with Ag/Ag_xS Composites under Visible Light Irradiation