Carrier TiO2 and preparation method as well as application thereof

A carrier and supported catalyst technology, which is applied in the direction of catalyst carriers, chemical instruments and methods, and oxidation preparation of carbonyl compounds, etc., can solve the problems of unreported catalytic performance, achieve large industrial application value, high activity, and good repeatability of results Effect

Active Publication Date: 2016-02-24
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However for Au n (nn The catalytic properties of (n<=10) clusters have not been reported

Method used

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  • Carrier TiO2 and preparation method as well as application thereof
  • Carrier TiO2 and preparation method as well as application thereof
  • Carrier TiO2 and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 0.400g of Ti powder and add 20mL HCl (0.5mol / L), stir in a beaker for 30min, mix well, pour into a hydrothermal kettle, heat at 180°C for 20h, cool to room temperature, continue to heat at 220°C for 10h, and obtain the product Centrifuge and wash three times with absolute ethanol. After washing, dry in vacuum at 60°C for 12h to obtain columnar TiO 2 Powder A, see SEM picture figure 1 ,TiO 2 Powder A is spherical, and the spherical surface is composed of multiple columnar structures; the XRD pattern is shown in image 3 . Prepare histidine to 0.1mol / L, additionally add HAuCl 4 ·3H 2 O was prepared to be 0.01mol / L, and the two solutions were mixed with histidine and HAuCl at room temperature 4 ·3H 2 The molar ratio of O is 20:1, placed at 20°C for 2 hours, and the yellow Au 10 Aqueous solution of B. Put A into B solution in a certain mass ratio (Au / TiO 2 =0.01, mass ratio), stirred at room temperature for 12h, stirred and dispersed evenly, and then rotated ...

Embodiment 2

[0045] Weigh 0.400g of Ti powder, add 20mL HCl (0.5mol / L), stir in a beaker for 30min, mix well, pour into a hydrothermal kettle, heat at 120°C for 40h, cool to room temperature, continue to heat at 220°C for 10h, and obtain the product Centrifuge and wash three times with absolute ethanol. After washing, dry in vacuum at 70°C for 15 hours to obtain columnar TiO 2 Powder A, see SEM picture figure 1 ,TiO 2 Powder A is spherical, and the spherical surface is composed of multiple columnar structures. Prepare histidine to 0.1mol / L, additionally make HAuCl 4 ·3H 2 O was prepared to be 0.01mol / L, and the two solutions were mixed with histidine and HAuCl at room temperature 4 ·3H 2 The molar ratio of O is 20:1, placed at 20°C for 2 hours, and the yellow Au 10 Aqueous solution of B. Put A into B solution in a certain mass ratio (Au / TiO 2 =0.01, mass ratio), stirred at room temperature for 15 hours, stirred and dispersed evenly, and then rotary evaporated at 50° C. After rotary...

Embodiment 3

[0048] Weigh 0.400g Ti powder, add 20mL HCl (1mol / L), stir in a beaker for 30min, mix well, pour into a hydrothermal kettle, heat at 140°C for 30h, cool to room temperature, continue to heat at 220°C for 10h, centrifuge after obtaining the product , and washed three times with absolute ethanol, after the washing was completed, vacuum-dried at 80°C for 12h to obtain the columnar structure TiO 2 Powder A, see SEM picture figure 1 ,TiO 2 Powder A is spherical, and the spherical surface is composed of multiple columnar structures. Prepare histidine to 0.1mol / L, additionally add HAuCl 4 ·3H 2 O was prepared to be 0.01mol / L, and the two solutions were mixed with histidine and HAu at room temperature 4 ·3H 2 The molar ratio of O is 20:1, placed at 25°C for 2 hours, and the yellow Au 10 Aqueous solution of B. Put A into B solution in a certain mass ratio (Au / TiO 2 = 0.01, mass ratio), stirred at room temperature for 12 hours, stirred and dispersed evenly, and then rotated at 5...

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Abstract

The invention discloses a carrier TiO2 and a preparation method as well as application thereof, an Au10 cluster supported catalyst, and a preparation method as well as application thereof. The carrier TiO2 is shaped like a sphere, wherein the surface of the sphere consists of multiple columnar structures. The preparation method of the carrier TiO2 comprises the following steps: adding Ti powder into hydrochloric acid, heating in a sectionalized way, centrifuging, washing and drying, thus obtaining the carrier TiO2, which is used for preparing the Au10 cluster supported catalyst. The Au10 cluster supported catalyst is prepared from an active component Au10 cluster and the carrier TiO2, wherein the mass ratio of Au to the carrier TiO2 is 0.005-0.02. The characteristics of high activity and high selectivity are achieved; the stable Au10 cluster supported catalyst can be obtained by adjusting an evaporating temperature after dipping, and the catalyst shows higher activity in catalyzing styrene oxidation; the preparation method of the carrier TiO2 is simple and easy to operate, stable in product and good in result repeatability, and has a good application prospect.

Description

technical field [0001] The invention relates to a carrier TiO 2 And its preparation method and application. Background technique [0002] In the late 1980s, Japan’s Haruta et al. found that supported nano-gold possesses unique catalytic properties and novel physical properties, such as good catalytic activity for CO low-temperature oxidation, good water resistance, stability and humidity enhancement effect, etc. . This discovery has changed the traditional idea that gold has no catalytic activity for a long time, and thus quickly set off a research boom of nano gold in the world. The controllable synthesis and characterization of atomically precise Au nanoclusters is a major breakthrough in the direction of nano-gold catalysts. These gold clusters with a specific number exhibit very strong confinement effects and enable the study of Au from the atomic scale. catalytic performance is possible. [0003] Just Au n In terms of nanoclusters, the currently prepared Au n (n&g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/06B01J23/52B01J35/08C01G23/053C07C47/54C07C45/28C07D301/19C07D303/04
CPCB01J21/063B01J23/52B01J35/08C01G23/053C01P2002/72C01P2004/03C07C45/28C07C47/54C07D301/19C07D303/04
Inventor 祝艳李立雄孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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