Preparation method of Pd/TiO2 nanowire catalyst, prepared catalyst and application thereof

A nanowire and catalyst technology is applied in the preparation of Pd/TiO2 nanowire catalyst, the obtained catalyst and its application field, which can solve the problems such as no relevant research reports, and achieve the effects of high activity, simple operation, and easy recycling.

Active Publication Date: 2016-05-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, on one-dimensional TiO 2 There are no relevant research reports on the bioreduction prepa

Method used

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  • Preparation method of Pd/TiO2 nanowire catalyst, prepared catalyst and application thereof
  • Preparation method of Pd/TiO2 nanowire catalyst, prepared catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1.5g of TiO 2 Add (P25) powder into NaOH aqueous solution, stir thoroughly for 30min, and transfer the solution to a 200mL hydrothermal reaction kettle, react hydrothermally at 200°C for 48h, wash with hydrochloric acid, wash with water, dry, and roast at 450°C 4h, to obtain one-dimensional TiO 2 Nanowire support, named TiO 2 (450).

[0024] Dry and pulverize the leaves of Cinnamomum camphora plant, take 2g and add 200mL water, stir for 2h and then filter to obtain filtrate A, take 30mL of filtrate and add 200 microliters of 74mM palladium nitrate aqueous solution, and stir at 90°C for 1.0h to obtain Solution B, the appropriate amount of TiO 2 (450) The nanowire carrier is added to the solution B, so that the loading amount of Pd is 1wt%, and after stirring for 1 h, it is filtered, washed with water, and dried in vacuum to obtain powdered Pd / TiO 2 Nanowire Catalyst A.

[0025] Oxidation reaction of benzyl alcohol: Pd / TiO was added to a 50mL three-necked flask 2 Ad...

Embodiment 2

[0027] 1.5g of TiO 2 (P25) powder was added to NaOH aqueous solution, stirred thoroughly for 30min, and the solution was transferred to a 200mL hydrothermal reaction kettle, hydrothermally reacted at 200°C for 48h, washed with hydrochloric acid, washed with water, dried, and roasted at 600°C 4h, to obtain one-dimensional TiO 2 Nanowire support, named TiO 2 (600).

[0028] Solution B is prepared according to the method of Example 1, and an appropriate amount of TiO 2 The nanowire carrier was added to solution B, so that the loading amount of Pd was 1wt%, and after stirring for 1 h, it was filtered, washed with water, and dried in vacuum to obtain powdered Pd / TiO 2 Nanowire Catalyst B. Catalyst evaluation conditions are the same as in Example 1, and the catalytic reaction results are shown in Table 1.

Embodiment 3

[0030] 1.5g of TiO 2 (P25) powder was added to NaOH aqueous solution, stirred thoroughly for 30min, and the solution was transferred to a 200mL hydrothermal reaction kettle, hydrothermally reacted at 200°C for 48h, washed with hydrochloric acid, washed with water, dried, and roasted at 700°C 4h, to obtain one-dimensional TiO 2 Nanowire support, named TiO 2 (700).

[0031] Solution B is prepared according to the method of Example 1, and an appropriate amount of TiO 2 The nanowire carrier was added to solution B, so that the loading amount of Pd was 1wt%, and after stirring for 1 h, it was filtered, washed with water, and dried in vacuum to obtain powdered Pd / TiO 2 Nanowire Catalyst C. Catalyst evaluation conditions are the same as in Example 1, and the catalytic reaction results are shown in Table 1.

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PUM

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Abstract

The invention discloses a preparation method of a Pd/TiO2 nanowire catalyst, the prepared catalyst and application thereof. The preparation method of the Pd/TiO2 nanowire catalyst includes the following steps that 1, TiO2 powder is added to a NaOH water solution, after the mixture is fully stirred, the mixed solution is transferred into a hydrothermal reaction kettle, a hydrothermal reaction is conducted for 36-48 hours at the temperature of 150-200 DEG C, acid cleaning, water cleaning, drying and baking at the temperature of 300-1000 DEG C are conducted, and finally a one-dimension of TiO2 nanowire carrier is obtained; 2, cinnamomum camphora plant leaves are dried in the sun and crushed, water is added, the mixture is stirred for 1-4 hours and then filtered, filtrate A is obtained, a Pd precursor is added to the filtrate A, stirring is conducted for 1-3 hours at the temperature of 50-90 DEG C, and a solution B is obtained; 3, the one-dimension of TiO2 nanowire carrier is added to the solution B, stirring is conducted for 1-3 hours, then filtering, water cleaning and drying are conducted, and the powder-shaped Pd/TiO2 nanowire catalyst can be obtained. The Pd/TiO2 nanowire catalyst is applied to a reaction for preparing benzaldehyde through benzaldehyde solvent-free liquid-phase oxidation and has good catalytic activity.

Description

technical field [0001] The present invention relates to a kind of Pd / TiO 2 Preparation method of nanowire catalyst, prepared Pd / TiO 2 Nanowire catalyst and the application of the catalyst in the oxidation reaction of benzyl alcohol. Background technique [0002] Benzaldehyde is an important raw material in medicine, dyestuff, perfume and resin industry. The current industrial production method of benzaldehyde has problems such as environmental pollution, difficult separation of the product, especially the chlorine element contained in the product. The chlorine contained in benzaldehyde products limits its industrial application to some extent. It is predicted that the market demand for benzaldehyde in my country this year will reach 300,000 tons, of which the demand for "chlorine-free" benzaldehyde accounts for about half. With the rapid growth of demand for benzaldehyde, there will still be a huge gap in the country. Therefore, the development of a "green" production pr...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J21/06C07C45/38C07C47/54
CPCB01J21/063B01J23/44B01J35/023C07C45/38C07C47/54
Inventor 张国亮杜明明李清彪
Owner ZHEJIANG UNIV OF TECH
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