4 results about "Nickel ions" patented technology

The invention discloses an acidic electroplating zinc-nickel alloy electrolyte, a preparation method and an electroplating method thereof; the electrolyte comprises a basic electrolyte and additives; the basic electrolyte is a weakly acidic solution which comprises zinc ions with mass concentration of 27-38g/L, nickel ions with mass centralization of 23-31g/L, chloride ions with mass concentration of 150-220g/L and boric acid with mass concentration of 25-35g/L at Ph value of 4.8-5.4 and at temperature of 28-35 DEG C; and the additives comprise a brightening agent of 1-12 ml/L, a walk agent of 3-30 ml/L and a disodium ethylenediamine tetraacetate complexant of 10-50 ml/L. The acidic electroplating zinc-nickel alloy electrolyte is rational in proportion and proper in matching; the galvanizing efficient is improved by 30-40% compared with the traditional acidic galvanizing; the corrosion resistance of a zinc-nickel coating can be improved remarkably and the service life of the coating is prolonged; the coating is high in hardness, corrosion resistance, abrasive resistance, pyro-oxidation resistance, compactness and comprehensive performance; the electrolyte does not need to the post-treatment technique, so that the adopted electroplating method is saved in cost, efficient and rapid, convenient in operation and far superior to the traditional alkaline zinc-nickel electroplating.

The invention provides preparation and application of nano zeolite reinforced xanthan gum composite hydrogel functional microspheres. The method selects a nanoscale zeolite molecular sieve which is synthesized by a template-free and low-cost manner, then premixes the nanoscale zeolite molecular sieve into a xanthan gum-sodium alga acid binary natural polysaccharide aqueous solution to prepare nano zeolite molecular sieve reinforced organic-inorganic composite hydrogel functional microspheres. Corresponding nano zeolite has a clear synergetic heavy metal adsorbing behavior; meanwhile, a corresponding xanthan gum-sodium alga acid binary polysaccharide cross-linking matrix has a richer micro three-dimensional network structure, thus micro channels of the nano zeolite, which are evenly distributed, directionally interact with polysaccharide molecular characteristic functional groups. The prepared microspheres have satisfactory effects of absorbing and removing cobalt ions and nickel ions in simulation nuclear industry wastewater.

The invention discloses synthesis of a probe detecting a copper ion (Cu<2+>) and a nickel ion (Ni<2+>) by a colorimetric method, and an application in detection of Cu<2+> and Ni<2+> in a water sample.A structural formula of the molecular probe is as follows as shown in the specification. The molecular probe can give different complex reactions with Cu<2+> and Ni<2+> in an aqueous solution to showdifferent colors so as to achieve the purpose of simultaneously detecting Cu<2+> and Ni<2+> by colorimetry; a detection solution is changed to bright red from yellow after complexing of the probe andCu<2+>; the detection solution is changed to purple after complexing of the probe and Ni<2+>; a color change is obvious; a detection speed is high; and the differentiation is easy. High-sensitivity detection of Cu<2+> and Ni<2+> can be achieved in combination with ultraviolet spectrophotometry; the probe can directly detect a micro level of Cu<2+> and Ni<2+> in the water; and the limits of detection are as low as 2.1nM and 1.2nM respectively. When a pH (potential of hydrogen) is 4-10, the probe can highly sensitively detect Cu<2+> and Ni<2+> in the water sample, is simple to operate and goodin selectivity and has a higher application value in the fields of environmental science, analysis, detection and the like.

The invention discloses a magnetically-induced self-assembled electrochemical biosensor for sensitively detecting trace nickel ions and application of the magnetically-induced self-assembled electrochemical biosensor, and belongs to the technical field of electrochemical biosensing. According to the electrochemical biosensor, nickel ion dependent deoxyribozyme is used as a biological recognition element, nickel ions can be specifically recognized, and the electrochemical biosensor has good selectivity. The alpha-Fe3O4/Fe2O3-Au nanocomposite is used as an electrode substrate material, has good conductivity, and can be stably combined on the surface of an electrode through magnetic force induced self-assembly. The electrochemical biosensor has the advantages that the linear range of the nickel ion concentration capable of being detected is 100 pM to 10 muM, and the detection limit is 55 pM; the electrochemical biosensor constructed by the invention is high in sensitivity, strong in specificity, low in detection limit, simple to prepare and short in detection period.