scispace - formally typeset
Search or ask a question
Topic

Sodium hypophosphite

About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.


Papers
More filters
Journal ArticleDOI
23 Jan 2019
TL;DR: In this article, the microhardness of electroless Ni-Co-P alloy coating over copper substrate was investigated and three different design factors i.e., the concentration of cobalt sulphate, concentration of sodium hypophosphite and bath temperatures were used as the process parameters which were optimised by using Box Behnken Design (BBD).
Abstract: The present study investigates optimisation of microhardness of electroless Ni–Co–P alloy coating over copper substrate. The microhardness of the coating was significantly higher compared to the substrate. Three different design factors i.e., the concentration of cobalt sulphate, concentration of sodium hypophosphite and bath temperatures were used as the process parameters which were optimised by using Box Behnken Design (BBD) and coating micro hardness was taken as a response factor. Vickers' hardness test was conducted to obtain the micro hardness values of the coated samples. From the model analysis results, it was found 15 g L−1 of cobalt sulphate, 25 g L−1 of sodium hypophosphite and a bath temperature of 85 °C were the optimum conditions for the coating deposition in order to obtain the hardness value of 1921 HV10g. After annealing at 350 °C the hardness value was further enhanced to 1990 HV10g. Analysis of variance (ANOVA) was carried out to find the graphical relationship between the different process parameters. The detail surface morphology of the Ni–Co–P coating was studied by using an optical microscope and a Scanning Electron Microscope (SEM). The phase and elemental compositions were determined by x-ray Diffraction (XRD) analysis and Energy Dispersive x-ray analysis (EDX).

13 citations

Patent
06 Apr 2011
TL;DR: In this article, a Pd/Ce08Zr02O2/cordierite honeycomb ceramic monolithic catalyst, a preparation method and application thereof, was presented.
Abstract: The invention discloses a Pd/Ce08Zr02O2/cordierite honeycomb ceramic monolithic catalyst, a preparation method and application thereof The catalyst is prepared by taking cordierite honeycomb ceramic which is eroded by hydrochloric acid as a first carrier, a cerium-zirconium composite oxide as a second carrier, and a precious metal, namely palladium (Pd) as an active ingredient; preparing a cerium-zirconium composite coating on the cordierite carrier by an immersion method; immersing the carrier into plating solution; and directly reducing palladium onto the cordierite honeycomb ceramic coated with the cerium-zirconium composite coating by the redox reaction of palladium chloride and sodium hypophosphite and the self-catalysis of the palladium The preparation method improves the oxygen storage performance of the catalyst, improves high-temperature resistance, and realizes uniform load of nano-palladium particles on the carriers without embedding active sites; moreover, the using amount of the palladium is small, the utilization rate of the palladium is improved, the process is simple, the preparation period is short, and the production cost is low The monolithic catalyst prepared by the method has high activity and high stability; and the methylbenzene can be oxidized into harmless carbon dioxide (CO2) and water (H2O) in the presence of the catalyst at the temperature of 220 to 300 DEG C

13 citations

Patent
09 Oct 1998
TL;DR: In this paper, the problem of providing electroless nickel plating and gold plating methods on an aluminum electrode for forming a highly reliable electrode was solved by using substitution reaction electroless gold and oxidation reduction-type electroless plating.
Abstract: PROBLEM TO BE SOLVED: To provide electroless nickel plating and gold plating methods on an aluminum electrode for forming a highly reliable electrode. SOLUTION: Zinc is deposited 14 on the aluminum electrode 12 with zincate treating liquid containing sodium hydroxide and zinc oxide. Then, sodium hypophosphite being a reducing agent is dissolved in pure water. Pure water is added while it is adjusted to pH 9.0-12.0 with sodium hydroxide solution and it is immersed into solution 15 which is set to be 1000 mL in total. Then, nickel plating is executed with the condition of pH 4.0-6.8 at 80-90°C by using oxidation-reduction reaction electroless nickel plating liquid containing sulfur compound with the aluminum electrode 12 of the semiconductor element as reaction accelerator. Thus, a nickel film 16 containing phosphorus and gold plating films 17 and 18 are obtained in all the aluminum electrodes 12 of the semiconductor element by executing substitution reaction electroless gold plating and oxidation reduction-type electroless plating. COPYRIGHT: (C)1999,JPO

13 citations

Journal ArticleDOI
TL;DR: In this article, conductive wool fabrics were prepared using different concentrations of multiwall carbon nanotubes (MWCNT) and carboxylated multi-wall carbon Nanotube (FWCNT) in presence of citric acid as a cross-linking agent and sodium hypophosphite as a catalyst.

13 citations

Journal ArticleDOI
TL;DR: In this paper, the authors evaluated the wrinkle behavior and wrinkle resistant properties of cotton fabrics dyed by Direct Blue 2B in the presence and absence of nano-TiO2 particles.
Abstract: Abstract This study evaluates the wrinkle behaviour and wrinkle resistant properties of cotton fabrics dyed by Direct Blue 2B in the presence and absence of nano-TiO2 particles. A finishing process on samples was performed before dyeing by means of 1,2,3,4-butanetetracarboxylic acid (BTCA) and sodium hypophosphite (SHP) using a pad dry cure method. Such experiments as wrinkle recovery test (AATCC-128), water drop test and dye fastness determination (ISO 105-C01) were conducted to understand how current treatment impacted the cotton fabrics’ properties. Finally, samples were characterised using the X-ray diffractometery method to scrutinise how crystallinity changes and dominates the structural parameter (wrinkle behaviour) of cotton fabrics. Furthermore, scanning electron microscopy (SEM) was used to visualise the surface variations of the samples before and after dyeing process. The results showed that the wrinkle resistant of cross-linked fabrics have been improved after direct dyeing. Furthermore, levelness dyeing and good fastness properties of dyes on cross-linked fabrics were observed.

13 citations


Network Information
Related Topics (5)
Oxide
213.4K papers, 3.6M citations
72% related
Coating
379.8K papers, 3.1M citations
72% related
Photocatalysis
67K papers, 2.1M citations
71% related
Aqueous solution
189.5K papers, 3.4M citations
70% related
Carbon nanotube
109K papers, 3.6M citations
70% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202315
202234
202125
202051
2019116
201890