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Supported binary metal oxide nano-catalyst and preparation method thereof

A nano-catalyst and binary metal technology, applied in the field of nano-materials, can solve the problems of difficult large-scale promotion and application, high price, etc., and achieve the effect of cheap raw materials, less demand, and good thermal stability

Inactive Publication Date: 2014-05-07
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, considering the practicability and high price of precious metals, it is difficult to popularize and apply them on a large scale; at the same time, non-precious metals and metal oxides have been widely used and have shown good activity at high temperatures, making up for the shortcomings of precious metals that are easy to deactivate at high temperatures

Method used

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  • Supported binary metal oxide nano-catalyst and preparation method thereof
  • Supported binary metal oxide nano-catalyst and preparation method thereof
  • Supported binary metal oxide nano-catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Ti 0.5 sn 0.5 o 2 Preparation of composite oxides: TiCl 4 solution and SnCl 4 ·5H 2 O was mixed according to the Ti:Sn molar ratio of 1:1, and the mixed solution was stirred for 1 hour, then slowly and uniformly added dilute ammonia water to the mixed solution while stirring until the pH=10, and the precipitation was complete. Then the resulting precipitate was washed with dilute ammonia water and suction filtered, then dried in an oven at 110°C for 12 hours, and ground; then roasted in a muffle furnace at 550°C for 4 hours to obtain Ti 0.5 sn 0.5 o 2 Composite oxides, spare.

[0033] 2. 6% Fe 2 o 3 / Ti 0.5 sn 0.5 o 2 Preparation of nanocatalyst: 1g Ti 0.5 sn 0.5 o 2 Put the composite oxide as a carrier into 7.04ml, 0.1mol L -1 Fe(NO 3 ) 3 Ultrasonic immersion in the solution for 2 hours, the ultrasonic frequency is 2000 Hz; then use 120 ° C oil bath to stir and evaporate the water; vacuum dry at 90 ~ 100 ° C for 10 hours, the vacuum degree is 400 P...

Embodiment 2

[0036] 1. Ti 0.5 sn 0.5 o 2 Preparation of composite oxides: TiCl 4 solution and SnCl 4 ·5H 2 O was mixed according to the Ti:Sn molar ratio of 1:1, and the mixed solution was stirred for 2 hours. Then, while stirring, dilute ammonia water was slowly and uniformly dropped into the mixed solution until the pH=10, and the precipitation was complete. Then the resulting precipitate was washed with dilute ammonia water and suction filtered, then dried in an oven at 120°C for 16 hours, and ground; then roasted in a muffle furnace at 550°C for 5 hours to obtain Ti 0.5 sn 0.5 o 2 Composite oxides, spare.

[0037] 2. 6% Fe 2 o 3 / 1%CeO 2 / Ti 0.5 sn 0.5 o 2 The preparation of binary metal oxide nano-catalyst comprises the following steps:

[0038] (1) Put 1g Ti 0.5 sn 0.5 o 2 Put the composite oxide as a carrier into 0.88ml0.1mol L -1 Ce(NO 3 ) 3 Ultrasonic immersion in the solution for 1.5h, the ultrasonic frequency is 2000Hz; then use a 120°C oil bath to stir and e...

Embodiment 3

[0042] 1. Ti 0.5 sn 0.5 o 2 The preparation of composite oxide is the same as in Example 1.

[0043] 2. 6% Fe 2 o 3 / 3%CeO 2 / Ti 0.5 sn 0.5 o 2 The preparation of binary metal oxide nano-catalyst comprises the following steps:

[0044] (1) Put 1g Ti 0.5 sn 0.5 o 2Put the composite oxide as a carrier into 2.64ml0.1mol L -1 Ce(NO 3 ) 3 Ultrasonic immersion in the solution for 1.5h, the ultrasonic frequency is 2000Hz; then use a 120°C oil bath to stir and evaporate to dryness; vacuum dry at 90-100°C for 10h, the vacuum degree is 400Pa; grind through a 160-mesh sieve. Calcined at 500°C for 4h in air atmosphere to get 3%CeO 2 / Ti 0.5 sn 0.5 o 2 Nano catalyst;

[0045] (2) The 3%CeO obtained in step (1) 2 / Ti 0.5 sn 0.5 o 2 Put the nano catalyst into 7.04ml0.1mol L -1 Fe(NO 3 ) 3 Ultrasonic immersion in the solution for 2 hours, the ultrasonic frequency is 2000 Hz; then use 120 ° C oil bath to stir and evaporate the water; vacuum dry at 90 ~ 100 ° C for 10 ...

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Abstract

The invention discloses a supported binary metal oxide nano-catalyst and a preparation method of the supported binary metal oxide nano-catalyst. The preparation method comprises the following steps: (1) performing ultrasonic immersing on Ti0.5Sn0.5O2 composite oxide into Ce(NO3)3 solution, performing oil bath to evaporate out water, performing vacuum drying, grinding and roasting so as to obtain CeO2 / Ti0.5Sn0.5O2 nano-catalyst; (2) performing ultrasonic immersing on the CeO2 / Ti0.5Sn0.5O2 nano-catalyst obtained in the step (1) into Fe(NO3)3 solution, performing oil batch to evaporate out water, performing vacuum drying, grinding and roasting to obtain supported binary metal oxide nano-catalyst of Fe2O3 / CeO2 / CeO2 / Ti0.5Sn0.5O2. The nano-catalyst and the preparation method provided by the invention have the advantages of adoption of cheap and easily available raw materials, simple method and equipment, low energy consumption, small pollution and potential industrial application and the like, large-scale production can be realized and the catalytic performance is excellent.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to binary metal-loaded nanomaterials and a preparation method thereof. Background technique [0002] NO x Elimination is one of the important topics to control environmental pollution, and CO catalytic reduction of NO x It is an important reaction to eliminate automobile exhaust pollutants. The catalysts generally used are noble metals (Rh, Pt and Pd) loaded on TiO 2 , Al 2 o 3 , ZrO 2 and CeO 2 These catalysts show good activity in the CO+NO reaction. However, considering the practicability and high price of precious metals, it is difficult to popularize and apply them in a large area; at the same time, non-noble metals and metal oxides have been widely used and have shown good activity at high temperatures, making up for the shortcomings of precious metals that are easy to deactivate at high temperatures . [0003] Iron-based catalysts show good activity ...

Claims

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Application Information

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IPC IPC(8): B01J23/835B01D53/90B01D53/56
Inventor 董丽辉
Owner GUANGXI UNIV
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