Preparation method for double-supported columbate material

A technology of niobate and photocatalytic materials, applied in chemical instruments and methods, catalyst supports, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as low efficiency

Inactive Publication Date: 2014-12-31
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problem of low efficiency in traditional oxide photoca

Method used

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  • Preparation method for double-supported columbate material

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Experimental program
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Effect test

specific Embodiment approach 1

[0008] (1) Nb 2 o 5 , Na 2 CO 3 , K 2 CO 3 According to KNbO 3 Stoichiometric mixing.

[0009] (2) After grinding the mixture, preheat it at 800° C. for 4 hours.

[0010] (3) After grinding again, calcining at a temperature of 900°C for 5h to obtain KNbO 3 .

[0011] (4) 1g KNbO 3 Add to a glass container, add 100mL of distilled water, 40mL of methanol and a certain amount of chloroplatinic acid.

[0012] (5) The prepared solution was magnetically stirred to form a suspension solution, and a 300W xenon lamp was irradiated for 8 hours to reduce the Pt and deposit it on the surface of the photocatalyst.

[0013] (6) After the reaction, the reaction solution was filtered and washed with water and alcohol several times.

[0014] (7) Put it into a blast drying oven at 60° C. for 8 hours to form a Pt-loaded photocatalytic material.

specific Embodiment approach 2

[0015] (1) Nb 2 o 5 , Na 2 CO 3 , K 2 CO 3 According to KNbO 3 Stoichiometric mixing.

[0016] (2) After grinding the mixture, preheat it at 800° C. for 4 hours.

[0017] (3) After regrinding, calcining at 900°C for 5h to obtain KNbO 3 .

[0018] (4) 2g KNbO 3 and an appropriate amount of Ru 3 (CO) 12 The tetrahydrofuran solution was placed in a ceramic evaporating dish.

[0019] (5) Stir magnetically at room temperature for 4 hours and then dry in an oven (60° C.).

[0020] (6) After drying, bake at 350°C for 1 hour to form RuO 2 supported photocatalytic materials.

specific Embodiment approach 3

[0021] (1) Nb 2 o 5 , Na 2 CO 3 , K 2 CO 3 According to KNbO 3 Stoichiometric mixing.

[0022] (2) After grinding the mixture, preheat it at 800° C. for 4 hours.

[0023] (3) After regrinding, calcining at 900°C for 5h to obtain KNbO 3 .

[0024] (4) 2g KNbO 3 and an appropriate amount of Ru 3 (CO) 12 The tetrahydrofuran solution was placed in a ceramic evaporating dish.

[0025] (5) Stir magnetically at room temperature for 4 hours and then dry in an oven (60° C.).

[0026] (6) After drying, bake at 350°C for 1 hour to form RuO 2 supported photocatalytic materials.

[0027] (7) 1g KNbO 3 Join the formed RuO 2 Add 100 mL of distilled water, 40 mL of methanol and a certain amount of chloroplatinic acid to the loaded photocatalytic material.

[0028] (8) The prepared solution was magnetically stirred to form a suspension solution, and a 300W xenon lamp was irradiated for 8 hours to reduce the Pt and deposit it on the surface of the photocatalyst.

[0029] (9) A...

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Abstract

The invention provides a preparation method for a double-supported columbate material. The preparation method for the Pt and RuO2 double-supported photocatalytic material includes: mixing Nb2O5, Na2CO3 and K2CO3 according to a KNbO3 stoichiometric ratio, grinding the mixture, then conducting preheating treatment at 800DEG C for 4h, performing grinding again, then conducting calcination at 900DEG C for 5h to obtain KNbO3, putting 2g of KNbO3 and a proper amount of Ru3(CO)12 tetrahydrofuran solution into a ceramic evaporating dish, carrying out magnetic stirring at room temperature for 4h, then putting the mixture into an oven to conduct drying (60DEG C), then carrying out roasting at 350DEG C for 1h to form an RuO2 supported photocatalytic material, and then adding 1g of KNbO3 into the formed RuO2 supported photocatalytic material, adding 100mL of distilled water, 40mL of methanol and a certain amount of columbate solution, conducting magnetic stirring on the formed solution to form a suspension solution, employing a 300W xenon lamp to perform illumination for 8h to reduce Pt and deposit it on the photocatalyst surface, at the end of the reaction, filtering the reaction solution, and conducting washing with water and alcohol repeatedly, and then placing the material into a 60DEG C blast drying oven to conduct drying for 12h, thus forming the double-supported photocatalytic material.

Description

technical field [0001] The invention relates to the preparation of niobate materials, in particular to the preparation of a double-loaded niobate material. Background technique [0002] The use of photocatalytic technology to treat air and water pollution has the prospect and significance of practical application, and has been highly concerned and valued by the scientific community. A large number of experimental results have shown that when using supporting materials, that is, using certain substances as the carrier of the catalyst, the photocatalytic activity of the catalyst is very different due to the different diffusion of interface ions. [0003] As early as 1980, Sato et al. discovered that Pt / TiO deposited by noble metal Pt 2 Can enhance H 2 O to H 2 and O 2 photocatalytic efficiency. Loading noble metals or transition metals on the surface of semiconductors can improve the efficiency of electron-hole separation in the process of photogenerated electron transfer...

Claims

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Application Information

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IPC IPC(8): B01J23/648B01J32/00
Inventor 史海峰蓝奔月解宇轩
Owner JIANGNAN UNIV
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