Preparation method and application of expanded perlite loaded gold nanoparticle catalyst

A technology of expanded perlite and nano-gold particles, used in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. High price, large waste of gold and other problems, to achieve the effect of simple preparation process

Active Publication Date: 2020-09-18
KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the co-precipitation method include: the high price of transition metal nitrates used in the material synthesis process, a large amount of gold waste, and a large amount of waste liquid generated during the washing process.
However, the preparation of gold nanomaterials by deposition-precipitation method requires a large amount of reducing agent, which is easy to produce waste liquid containing toxic substances

Method used

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  • Preparation method and application of expanded perlite loaded gold nanoparticle catalyst
  • Preparation method and application of expanded perlite loaded gold nanoparticle catalyst
  • Preparation method and application of expanded perlite loaded gold nanoparticle catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Effect of solid content of sodium silicate on the catalytic performance of the prepared expanded perlite-loaded nano-gold particle catalyst

[0024] The expanded perlite is ground and passed through a 200-mesh sieve to obtain expanded perlite powder. According to the solid-liquid ratio of 0.3mg / mL, mix the expanded perlite powder into the sodium silicate aqueous solution with a solid content of 10%, 15%, 18%, 20%, 30%, 40%, 42%, 45%, and 50%. In the process, stirring at 60rpm, low-temperature plasma irradiation for 0.5 hours at the same time, solid-liquid separation, and drying at 50°C, nine groups of dielectric silicon carrier powders were obtained. The low-temperature plasma irradiation voltage was 10kV, and the irradiation method was arc Discharge, low temperature plasma aeration atmosphere is air. According to the solid-liquid ratio of 0.6 mg / mL, the nine groups of medium silicon carrier powders were mixed into the chloric acid, aged for 12 hours, then st...

Embodiment 2

[0031] Example 2 The effect of the solid-liquid ratio of medium silicon carrier powder and auric acid on the catalytic performance of the prepared expanded perlite-loaded nano-gold particle catalyst

[0032]The expanded perlite is ground and passed through a 300-mesh sieve to obtain expanded perlite powder. According to the solid-liquid ratio of 0.75mg / mL, the expanded perlite powder was mixed into the sodium silicate aqueous solution with a solid content of 40%, stirred at a rate of 210rpm, and low-temperature plasma was irradiated for 1 hour at the same time, and the solid-liquid separation was carried out at 100°C. The dielectric silicon carrier powder is obtained by drying under the lower pressure, wherein the low-temperature plasma irradiation voltage is 20kV, the irradiation method is arc discharge, and the low-temperature plasma aeration atmosphere is air. According to the solid-liquid ratio of 0.3mg / mL, 0.4mg / mL, 0.5mg / mL, 0.6mg / mL, 0.9mg / mL, 1.2mg / mL, 1.3mg / mL, 1.4mg / ...

Embodiment 3

[0037] Example 3 Effect of Hydrogen Content in Mixed Gas on the Catalytic Performance of the Prepared Expanded Perlite-loaded Nano-gold Particle Catalyst

[0038] The expanded perlite is ground and passed through a 200-mesh sieve to obtain expanded perlite powder. According to the solid-liquid ratio of 1.2mg / mL, the expanded perlite powder was mixed into the sodium silicate aqueous solution with a solid content of 40%, stirred at a rate of 360rpm, and irradiated with low-temperature plasma for 1.5 hours at the same time, separated from solid and liquid, at 150°C The dielectric silicon carrier powder is obtained by drying under a lower temperature, wherein the low-temperature plasma irradiation voltage is 30kV, the irradiation method is arc discharge, and the low-temperature plasma aeration atmosphere is air. According to the solid-liquid ratio of 1.2 mg / mL, the dielectric silicon carrier powder was mixed into the hydrochloric acid, aged for 24 hours, then stirred at a rate of ...

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Abstract

The invention discloses a preparation method and application of an expanded perlite loaded gold nanoparticle catalyst, wherein the preparation method comprises the following steps: mixing expanded perlite powder into a sodium silicate aqueous solution, stirring, carrying out low-temperature plasma irradiation, carrying out solid-liquid separation, and drying to obtain medium silicon carrier powder; and mixing the medium silicon carrier powder into gold chlorate, aging for 12-24 hours, stirring, carrying out low-temperature plasma irradiation, carrying out solid-liquid separation, and drying toobtain the expanded perlite loaded nano-gold particle catalyst. The preparation process is simple, and no reducing reagent needs to be added in the preparation process of the gold nanoparticles. Silicate is converted into polysilicagel by applying a low-temperature plasma technology, so that loading and dispersion of the gold nanoparticles on the surface of the expanded perlite are enhanced. Thegold nano catalytic material prepared by the method can catalyze and remove 99% of 4-nitrophenol to the maximum extent.

Description

technical field [0001] The invention relates to the technical innovation field of preparation of nano-catalyst materials, in particular to a preparation method and application of expanded perlite-loaded nano-gold particle catalysts. Background technique [0002] Although gold is an inert metal, it exhibits strong catalytic activity when it exists in a small-sized, highly dispersed nano-morphology. At present, the methods for preparing gold nanocatalyst materials mainly include co-precipitation method, deposition-precipitation method, and photochemical deposition method. The co-precipitation method is to promote the transition metal and HAuCl by changing the pH of the solution. 4 Co-precipitation occurs, and then the gold nano catalyst material is obtained through repeated washing and high-temperature calcination. The main disadvantages of the co-precipitation method include: the high price of transition metal nitrates used in the material synthesis process, a large amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J37/34B01J37/18C02F1/00C02F101/34C02F101/38
CPCB01J23/52B01J37/349B01J37/18B82Y30/00B82Y40/00C02F1/00C02F2101/345C02F2101/38Y02W10/37
Inventor 黄涛宋东平金俊勋杜晶刘龙飞张树文
Owner KANFORT JIANGMEN ENVIRONMENTAL TECH CO LTD
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