Topic
Sodium hypophosphite
About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.
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TL;DR: In this article, a series of Ni−P−B catalysts were prepared by liquid-phase reduction, and the Ni:P:B ratios in the mother solution were fixed at 1:3:3.
Abstract: A series of Ni−P−B catalysts were prepared by liquid-phase reduction. Nickel acetate and sodium hypophosphite were mixed in ethanolic solution. The solution of sodium borohydride in excess amount was then added dropwise into the aforementioned mixture to ensure full reduction of the Ni cations. The Ni:P:B ratios in the mother solution was fixed at 1:3:3. These catalysts were characterized by powder X-ray diffraction, nitrogen sorption, transmission electron microscopy, and X-ray photoelectron spectroscopy. The effects of preparation conditions such as temperature, stirring speed, and sheltering gas on the particle size, surface compositions, oxidation states of surface atoms, and catalytic activities of the Ni−P−B catalysts were studied. The catalysts were tested by liquid-phase hydrogenation of p-chloronitrobenzene at 393 K and 1.2 MPa hydrogen pressure in a batch reactor. Raney nickel catalyst was included for comparison. The preparation condition had significant influence on the particle size and surfa...
51 citations
TL;DR: In this article, the influence of inorganic particles on the performance of the cellulose fiber was investigated using Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermo-gravimetric analyzer (TGA), scanning electron microscope (SEM), electron dispersive Xray spectrometer (EDX), water contact angle (WCA) and reflectance spectrography (RS).
Abstract: The aim of this research was to embed silica–kaolinite on a cotton surface using succinic acid (SA) as a cross-linking agent and sodium hypophosphite (SHP) as a catalyst. The influence of inorganic particles on the performance of the cellulose fiber was investigated using Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermo-gravimetric analyzer (TGA), scanning electron microscope (SEM), electron dispersive X-ray spectrometer (EDX), water contact angle (WCA) and reflectance spectroscopy (RS). ATR showed the possible interactions between silica, kaolinite, the cross-linking agent and cellulose functional groups on the surface. The results obtained from the thermal measurements demonstrated that the stabilized silica–kaolinite particles can significantly improve the thermal stability of the cotton fiber. This research suggests a successful method for stabilization and compatibility of various inorganic particles on cotton.
51 citations
TL;DR: The reduction of aromatic and aliphatic nitro groups to anilines and amines is performed with good yield and selectivity in short reaction times in a biphasic water/2-MeTHF system.
50 citations
TL;DR: Three different ratios of alginic acid/chitosan matrices of ratios 3/1, 1/1 and 1/2, respectively, were crosslinked in their dry state using citric acid (CA)/sodium hypophosphite (SHP) at different conditions controlling the crosslinking process.
50 citations
TL;DR: Alkaline salts with lower pKa1 values of the corresponding acids are more effective ones for the reaction since addition of these salts could lead to lower pH values and higher acid anion concentrations in finishing baths.
49 citations