Topic
Sodium sulfide
About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.
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TL;DR: In this paper, a one-pot, rapid and general method for the synthesis of symmetrical disulfides based on reaction of sulfur with sodium sulfide in the presence of didecyldimethylammonium bromide (DDAB) as a phase transfer catalyst is reported.
42 citations
TL;DR: Because of the advantages of low cost, good electrical conductivity and high oxidation resistance, nitrogen-doped carbon (NDC) materials have a potential to replace noble metals in microbial fuel cells (MFCs) for wastewater treatment.
42 citations
Patent•
09 May 1974
TL;DR: In this paper, the authors described new procedures and systems for the reduction of the production of thiosulfate by the oxidation of sodium sulfide or sodium hydrosulfide, and used them in the treatment of lignocellulose materials.
Abstract: Sodium polysulfide is prepared by the oxidation of sodium sulfide or sodium hydrosulfide, and by using new procedures and systems described, the production of thiosulfate can be markedly reduced and, in some cases, eliminated. The oxidant is air, oxygen or oxygen in mixture with other gases, the reductant is aqueous sodium sulfide or sodium hydrosulfide and the reaction is carried out with both reactants in non-flooded contact with a solid catalyst material, of which a typical example is a particulate carbon treated with polytetrafluoroethylene (PTFE). The reaction is typically conducted at atmospheric pressure and without the application of heat, with the oxidant and the reductant being in interfacial contact with each other, but only, insofar as possible, at sites where both are simultaneously in contact with a catalyst which is prevented from being flooded by either the oxidant or reductant. Sodium polysulfide and sodium hydroxide are produced, and are useable in treatment of lignocellulose materials. Various arrangements, materials and processes are also disclosed.
42 citations
TL;DR: Several methods for the preparation of mixed copper(II) sulfide and silver sulfide precipitates have been investigated as mentioned in this paper, and the results of these methods have been tested for their suitability as copper (II)-selective membranes.
42 citations
TL;DR: In this paper, the effects of pH and catalyst and substrate concentrations on the rate of photocatalytic hydrogen evolution have been investigated and the quantum efficiency of the process is up to 12.9%.
Abstract: Noble metal-free, Cd1 − x
Zn
x
S-based photocatalysts for hydrogen evolution from aqueous solutions of sodium sulfide and sodium sulfite upon irradiation with visible light (λ > 420 nm) have been synthesized and characterized by a complex of physicochemical methods. The effects of pH and catalyst and substrate concentrations on the rate of photocatalytic hydrogen evolution have been investigated. Under the optimal conditions, the quantum efficiency of the process is up to 12.9%.
41 citations