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Nickel-titanium dioxide-carbon trinary nano composite catalyst and preparation method thereof

A titanium dioxide and nanocomposite technology, applied in the preparation of organic compounds, preparation of amino hydroxyl compounds, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of active metal size, carbon layer structure is difficult to be effectively controlled, etc. problems, to achieve the effect of improving catalytic activity and stability

Inactive Publication Date: 2015-08-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the impregnation synthesis, it is difficult to effectively control the active metal size and carbon layer structure of the microstructure.

Method used

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  • Nickel-titanium dioxide-carbon trinary nano composite catalyst and preparation method thereof
  • Nickel-titanium dioxide-carbon trinary nano composite catalyst and preparation method thereof
  • Nickel-titanium dioxide-carbon trinary nano composite catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Weigh 5.816g Ni(NO 3 ) 2 ·6H 2 0 and 3.84g sodium salicylate are dissolved in 50mL deionized water respectively under room temperature and are mixed with salt solution, and two kinds of salt solutions prepared are poured in the four-necked flask, and begin to rotate at a constant speed, so that the salt solution is mixed; Measure 1mL of concentrated hydrochloric acid in a dry beaker (the mouth of the beaker is sealed with plastic film), draw 0.5mL of TiCl with a syringe 4 (CP>99%) and pour it into a dry beaker immediately. After the white smoke dissipates, open the film and stir with a glass rod for 5 minutes, then add deionized water (50mL) drop by drop until the yellow complex is completely dissolved in water and the solution is clear and transparent ; Finally, the configured TiCl 4 The solution is poured into a four-neck bottle;

[0029] 2) Weigh 14.42g of urea and dissolve it in 50mL of deionized water to prepare lye, and pour it directly into the stirring reac...

Embodiment 2

[0040] 1) Weigh 3.49g Ni(NO 3 ) 2 ·6H 2 0 and 2.56g sodium salicylate are dissolved in 50mL deionized water respectively at room temperature and are mixed with salt solution, and two kinds of salt solutions prepared are poured in the four-necked flask, and begin to rotate at a constant speed, so that the salt solution is mixed; Measure 1mL of concentrated hydrochloric acid in a dry beaker (the mouth of the beaker is sealed with plastic film), draw 0.5mL of TiCl with a syringe 4 (CP>99%) and pour it into a dry beaker immediately. After the white smoke dissipates, open the film and stir with a glass rod for 5 minutes, then add deionized water (50mL) drop by drop until the yellow complex is completely dissolved in water and the solution is clear and transparent ; Finally, the configured TiCl 4 The solution is poured into a four-neck bottle;

[0041] 2) Weigh 9.61g of urea and dissolve it in 50mL of deionized water to prepare lye, and pour it directly into the stirring reactio...

Embodiment 3

[0047] 1) Weigh 5.816g Ni(NO 3 ) 2 ·6H 2 0 and 3.84g sodium salicylate are dissolved in 50mL deionized water respectively under room temperature and are mixed with salt solution, and two kinds of salt solutions prepared are poured in the four-necked flask, and begin to rotate at a constant speed, so that the salt solution is mixed; Measure 1mL of concentrated hydrochloric acid in a dry beaker (the mouth of the beaker is sealed with plastic film), draw 0.5mL of TiCl with a syringe 4 (CP>99%) and pour it into a dry beaker immediately. After the white smoke dissipates, open the film and stir with a glass rod for 5 minutes, then add deionized water (50mL) drop by drop until the yellow complex is completely dissolved in water and the solution is clear and transparent ; Finally, the configured TiCl 4 The solution is poured into a four-neck bottle;

[0048] 2) Weigh 28.84g of urea and dissolve it in 50mL of deionized water to make lye, and pour it directly into the stirring react...

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Abstract

The invention discloses a preparation method of a nickel-titanium dioxide-carbon trinary nano composite catalyst. In the provided preparation method, nickel salts, titanium salts and salicylate are taken as the primary raw materials; nickel ions, titanium ions and salicyl-carboxyl functional groups can self-assemble in an aqueous solution through the coordination interaction so as to obtain a three-dimensional flower-shaped structure, namely a salicyl-intercalated layered nickel-titanium hydroxide nano composite material, and finally burning the composite material in an atmosphere of inert gas through utilizing the self-reductive property of carbon so as to obtain the catalyst. Through the preparation method, carbon-coated nickel nano particles with a quantum size can be evenly dispersed among the titanium dioxide carrier, and thus the catalytic activity and stability of the catalyst are both improved. In the liquid-phase hydrogenation reactions of nitro-phenol, the provided catalyst can convert nitro-phenol into p-aminophenol within three minutes, the catalyst efficiency of the provided catalyst is 7 times faster than that of Pt@C catalyst, after the catalyst is repeatedly used for 10 times, the conversion rate of the provided catalyst can still reach 90% or more, and the catalyst can be recovered magnetically.

Description

technical field [0001] The invention belongs to the technical field of preparation of supported metal catalysts, and in particular relates to a preparation method of a nickel-titanium dioxide-carbon ternary nanocomposite catalyst and the application of catalytic hydrogenation performance. Background technique [0002] Supported metal catalysts have become a research hotspot in the field of metal catalysts because they can provide good dispersion for active metals, effectively control the particle size of active metals, and prevent the aggregation of metal particles. In addition, some special carriers (TiO 2 , graphitic carbon) In addition to effectively inhibiting the polymerization of active metal particles and improving the dispersion of the catalyst, it can also interact with the catalytically active metal to improve the activity and stability of the catalyst. [0003] At present, there are many reports on supported metal catalysts. Weitao et al. (Weitao Huo, Chunlei Zh...

Claims

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Application Information

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IPC IPC(8): B01J23/755C07C213/02C07C215/76B82Y30/00B82Y40/00
Inventor 王连英阚洪鹏杨旺张新月路艳罗
Owner BEIJING UNIV OF CHEM TECH
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