A kind of niti nano flower hydrotalcite photocatalyst and its preparation method and application

A technology of catalysts and nanoflowers, which is applied in the field of NiTi hydrotalcite photocatalysts and its preparation, can solve problems such as unfavorable applications and limited reaction conditions, achieve simple preparation methods, low requirements for reaction conditions, and improve apparent quantum efficiency Effect

Active Publication Date: 2021-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing synthesis methods include low-saturation co-precipitation method, hydrothermal synthesis method, ion exchange method, microwave crystallization method, etc. (Journal of the Chemical Society Reviews 43.20(2014): 7040-7066.), but most of them are multi-step synthesis, The reaction conditions are limited, which is not conducive to practical applications, etc.

Method used

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  • A kind of niti nano flower hydrotalcite photocatalyst and its preparation method and application
  • A kind of niti nano flower hydrotalcite photocatalyst and its preparation method and application
  • A kind of niti nano flower hydrotalcite photocatalyst and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of nickel-titanium nano flower hydrotalcite photocatalyst, comprising the steps of:

[0038] (1) Dissolve 0.29g of nickel nitrate hexahydrate, 0.237g of titanium sulfate and 2.8g of urotropine into 50 mL of deionized water, stir well to obtain a transparent solution;

[0039] (2) Transfer the transparent solution described in step (1) to a polytetrafluoroethylene lining and heat up in a muffle furnace for a heating reaction. The temperature of the heating reaction is 140°C, and the heating reaction time is 9 hours. Cool to room temperature. The heated product was obtained, and the precipitate was collected by suction filtration;

[0040] (3) drying the precipitate in step (2) at 30° C. to obtain the nickel-titanium nanoflower hydrotalcite photocatalyst.

Embodiment 2

[0042] A preparation method of nickel-titanium nano flower hydrotalcite photocatalyst, comprising the steps of:

[0043] (1) Dissolve 0.8721g of nickel nitrate hexahydrate, 0.237g of titanium sulfate and 2.8g of urotropine into 50 mL of deionized water, stir well to obtain a transparent solution;

[0044] (2) Transfer the transparent solution described in step (1) to a polytetrafluoroethylene lining and heat up in a muffle furnace for a heating reaction. The temperature of the heating reaction is 140°C, and the heating reaction time is 9 hours. Cool to room temperature. The heated product was obtained, and the precipitate was collected by suction filtration;

[0045] (3) drying the precipitate in step (2) at 60° C. to obtain the nickel-titanium nanoflower hydrotalcite photocatalyst.

[0046] The effect that the nickel-titanium nano-flower hydrotalcite photocatalyst that embodiment 2 makes is observed under the scanning electron microscope is as follows: figure 1 shown, from ...

Embodiment 3

[0048] A preparation method of nickel-titanium nano flower hydrotalcite photocatalyst, comprising the steps of:

[0049] (1) Dissolve 1.45g of nickel nitrate hexahydrate, 0.237g of titanium sulfate and 2.8g of urotropine into 50 mL of deionized water, stir well to obtain a transparent solution;

[0050] (2) Transfer the transparent solution described in step (1) to a polytetrafluoroethylene lining and heat up in a muffle furnace for a heating reaction. The temperature of the heating reaction is 140°C, and the heating reaction time is 9 hours. Cool to room temperature. The heated product was obtained, and the precipitate was collected by suction filtration;

[0051] (3) drying the precipitate in step (2) at 100° C. to obtain the nickel-titanium nanoflower hydrotalcite photocatalyst.

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Abstract

The invention discloses a NiTi hydrotalcite photocatalyst and a preparation method and application thereof. The catalyst is a three-dimensional NiTi nanometer, and the diameter of the nanoflower is 6-7 μm. The preparation method includes: dissolving titanium salt, nickel salt and urotropine in water, stirring the solution until transparent; heating the above reaction system for reaction; cooling and drying after heating to obtain the nickel-titanium nanoflowers Hydrotalcite photocatalyst, and the nickel-titanium hydrotalcite photocatalyst can be used to catalyze the conversion of xylose into xylonic acid. The method of the invention is very simple and convenient to synthesize the catalyst, and does not require high temperature heating, and the synthesized catalyst can be directly used for catalytic reaction without subsequent treatment. The catalyst provided by the invention has the potential to be industrialized, the cost of the catalytic process is low, and is different from traditional thermal catalysis, the process is green and environmentally friendly, and no harmful by-products are produced.

Description

technical field [0001] The invention belongs to the interdisciplinary technical fields of catalytic materials, photocatalysis, and biomass conversion into chemicals, and in particular relates to a NiTi hydrotalcite photocatalyst, a preparation method and application thereof. Background technique [0002] The sugars available in plant cellulose resources are mainly cellulose and hemicellulose, and the glucose fermentation industry using cellulose as raw material is relatively mature. However, xylose-based hemicellulose in plant fibers accounts for about 20% to 35%, and its efficient conversion and utilization has become one of the key technical bottlenecks of the entire biorefinery system. In recent years, xylonic acid, as an emerging product of high-efficiency biotransformation and utilization of plant fiber resource xylose, has broad industrial application potential, and has been identified by the U.S. Department of Energy as the most promising 30 target products or chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J37/10C07C51/295C07C59/105
CPCB01J23/755B01J35/004B01J37/10C07C51/295C07C59/105
Inventor 彭新文李铭赛钟林新刘泽昊陈亮
Owner SOUTH CHINA UNIV OF TECH
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