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.
Papers published on a yearly basis
Papers
More filters
TL;DR: The reaction of ω-(3,5-dialkyl-4-hydroxyphenyl)-1-chloroalkanes with sodium sulfide yielded the corresponding sulfides, which were tested as antioxidants in two model reactions: oxidation of lard and Vaseline oil as discussed by the authors.
Abstract: The reaction of ω-(3,5-dialkyl-4-hydroxyphenyl)-1-chloroalkanes with sodium sulfide yielded the corresponding sulfides, which were tested as antioxidants in two model reactions: oxidation of lard and Vaseline oil.
14 citations
TL;DR: Sludge with elemental sulfur and sodium thiosulfate as electron donor demonstrated more similar community structure compared with the sludge that denitrified with sodium sulfide according to the microbial similarity analysis, which could provide an insight into improving the understanding of SAD in engineering applications.
Abstract: Operation performance and bacterial community structure of sulfur-based autotrophic denitrification (SAD) based on different sulfur sources served as electron donor was first parallelly compared among three sequencing batch reactors. Sulfur and sodium thiosulfate systems achieved similar operation performance and were superior to that of sodium sulfide. When the influent NO3−–N concentration ranged from 50 to 150 mg/L, the effluent NO3−–N concentrations of the sulfur and sodium thiosulfate systems were 0–5.99 mg/L and 0–4.52 mg/L, respectively, without NO2−–N accumulation. However, when the effluent concentration of NO3−–N in the sodium sulfide system was 0–10.38 mg/L, that of NO2−–N in the effluent was 0–39.85 mg/L. In addition, participation of sulfur sources presented obvious pressure on the bacterial community structure based on the high-throughput sequencing. Microbial diversity results indicated that sludge with elemental sulfur as electron donor had the richest microbial diversity, followed by sodium thiosulfate and sodium sulfide. Moreover, sludge with elemental sulfur and sodium thiosulfate as electron donor demonstrated more similar community structure compared with the sludge that denitrified with sodium sulfide according to the microbial similarity analysis. The 9.34%, 24.3% and 29.6% of sequences could be assigned to potential SAD organisms from sludge denitrifying with elemental sulfur, sodium thiosulfate and sodium sulfide, respectively. Furthermore, all sludge denitrifying with different sulfur sources showed an enrichment of separate core functional microorganisms. This study could provide an insight into improving the understanding of SAD in engineering applications.
14 citations
Patent•
04 May 1971
TL;DR: The buffering action of the sodium sulfide provides the basicity required to maintain the alumina hydrate component of the reaction mixture in solution but not a basicity whereby zeolite crystallization is retarded as mentioned in this paper.
Abstract: Faujasitic-type crystalline zeolites X and Y are produced. In one embodiment, sodium sulfide is added to the reaction mixture as a source of sodium and as a buffer. The buffering action of the sodium sulfide provides the basicity required to maintain the alumina hydrate component of the reaction mixture in solution but not a basicity whereby zeolite crystallization is retarded. In another embodiment, a nucleating mixture having the formula 310Na2S: 5-15 Na2O: 5-50 SiO2: 0.4-4.0 Al2O3: 50-500H20 is added to the reaction mixture to promote crystall;ne zeolite formation.
14 citations
TL;DR: In this paper, a facile and simple approach for growing low-cost and mixed-phase cobalt sulfide counter-electrodes (CEs) for efficient dye sensitized solar cells (DSSCs) was reported.
Abstract: We report a facile and simple approach for growing low-cost and mixed-phase cobalt sulfide counter-electrodes (CEs) for efficient dye sensitized solar cells (DSSCs). The whole process involves growth of cobalt sulfide powders using a solution containing cobalt acetate and sodium sulfide by a chemical precipitation method at room temperature, preparation of cobalt sulfide pastes with ethyl cellulose, formation of cobalt sulfide films by screen-printing method, and treatment of the formed cobalt sulfide layers at 400 °C. Mixed-phase cobalt sulfide was formed on the FTO substrate after annealing. The electronic and ionic processes in platinum and cobalt sulfide based DSSCs are examined, analyzed and compared. Highly efficient DSSCs with mixed-phase cobalt sulfide CEs have been fabricated. The DSSC featuring a mixed-phase cobalt sulfide electrode achieved an energy efficiency as high as 7.2 %. The proposed cobalt sulfide CE manufacturing method is cheap and scalable. It can make large-scale electro-catalytic film fabrication cost competitive for both energy harvesting and storage applications.
14 citations