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Copper doped cerium oxide photocatalyst and preparation method thereof

A technology of ceria and photocatalyst, which is applied in the field of nanotechnology, can solve the problems of high cost, cumbersome preparation methods, and difficulty in industrial production of catalysts, and achieve improved photodegradation ability, improved catalytic effect, and changed photocatalytic activity. Effect

Inactive Publication Date: 2015-04-08
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, most of the above-mentioned metal-doped ceria catalysts use expensive rare earth elements, so their cost is relatively high, and the preparation method is relatively cumbersome, so it is difficult to carry out industrial production of the above-mentioned catalysts.

Method used

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  • Copper doped cerium oxide photocatalyst and preparation method thereof
  • Copper doped cerium oxide photocatalyst and preparation method thereof
  • Copper doped cerium oxide photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A non-copper-doped ceria photocatalyst with the formula Cu x Ce 1-x o 2-x , where x is 0.

[0083] The preparation method of the above-mentioned ceria photocatalyst without copper doping specifically comprises the following steps:

[0084] (1) At room temperature, use deionized water to prepare an aqueous solution of cerium nitrate with a concentration of 0.1mol / L and an aqueous solution of ammonium bicarbonate with a concentration of 0.5mol / L;

[0085] (2) Add 100 mL of cerium nitrate aqueous solution with a concentration of 0.1 mol / L dropwise at a rate of 2.5 mL / min to 120 ml of an aqueous ammonium bicarbonate solution with a concentration of 0.5 mol / L at a temperature of 80°C, and carry out co-production at 800 rpm. Precipitation reaction for 30 minutes, then naturally cooled to room temperature, the obtained reaction liquid was centrifuged at 8000 rpm for 5-15 minutes, the obtained precipitate was washed with deionized water until the effluent was neutral, then t...

Embodiment 2

[0093] A copper-doped ceria photocatalyst with the formula Cu x Ce 1-x o 2-x , where x is 0.05.

[0094] Above-mentioned a kind of copper-doped ceria photocatalyst, specifically comprises the following steps:

[0095] (1) At room temperature, use deionized water to prepare an aqueous solution of cerium nitrate with a concentration of 0.1mol / L, an aqueous solution of copper nitrate with a concentration of 0.1mol / L, and an aqueous solution of ammonium bicarbonate with a concentration of 0.5mol / L;

[0096] (2) Take 5 mL of copper nitrate aqueous solution and 95 mL of cerium nitrate aqueous solution and ultrasonically mix them to obtain a mixed solution of copper and cerium;

[0097] In the copper and cerium mixed solution, the molar ratio of copper: cerium is 0.05:0.95;

[0098] (3) Add the copper and cerium mixed solution obtained in step (2) dropwise at a controlled rate of 2.5 mL / min to 120 ml of ammonium bicarbonate aqueous solution with a concentration of 0.5 mol / L at a ...

Embodiment 3

[0106] A copper-doped ceria photocatalyst with the formula Cu x Ce 1-x o 2-x , where x is 0.1.

[0107] Above-mentioned a kind of copper-doped ceria photocatalyst specifically comprises the following steps:

[0108](1) At room temperature, use deionized water to prepare an aqueous solution of cerium nitrate with a concentration of 0.1mol / L, an aqueous solution of copper nitrate with a concentration of 0.1mol / L, and an aqueous solution of ammonium bicarbonate with a concentration of 0.5mol / L;

[0109] (2) Take 10 mL of copper nitrate aqueous solution and 90 mL of cerium nitrate aqueous solution and ultrasonically mix them to obtain a mixed solution of copper and cerium;

[0110] In the copper and cerium mixed solution, the molar ratio of copper: cerium is 0.1:0.9;

[0111] (3) Add the copper and cerium mixed solution obtained in step (2) dropwise at a controlled rate of 2.5 mL / min to 120 ml of ammonium bicarbonate aqueous solution with a concentration of 0.5 mol / L at a temp...

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Abstract

The invention discloses a copper doped cerium oxide photocatalyst and a preparation method thereof. The molecular formula of the copper doped cerium oxide photocatalyst is CuxCe<l-x>O<2-x>, in the formula, x is 0.05-0.2. The preparation method comprises the following steps: at the room temperature, dissolving cerous nitrate and cupric nitrate in deionized water, performing ultrasonic stirring for certain time, preparing NH4HCO3 solution or Na2CO3 solution by using deionized water, performing coprecipitation reaction for 30 minutes by using a coprecipitation method through reverse titration and by controlling the temperature to be 70-80 DEG C, after the reaction is completed, cooling to be the room temperature, performing centrifugal separation, washing, drying and calcining the obtained precipitate in sequence, thereby obtaining the copper doped cerium oxide photocatalyst with good photocatalytic performance. The needed production equipment is simple, and the industrialization production is easy to achieve.

Description

technical field [0001] The invention relates to a copper-doped ceria photocatalyst and a preparation method thereof, belonging to the field of nanotechnology. technical background [0002] Rare earth elements have a unique f-electron configuration, which makes rare earth compounds have special optical and charge magnetic properties, and are known as a treasure house of new materials. CeO 2 It is a cheap and versatile material, widely used in luminescent materials, catalysts, polishing powders, electronic ceramics, ultraviolet absorbing materials, etc. CeO 2 As an N-type semiconductor, its light absorption threshold is about 420nm, which is higher than TiO, the most commonly used semiconductor material at present. 2 387nm. It can be seen that ceria has good light absorption ability. [0003] Cerium dioxide has a strong hydrogen effect - a phenomenon in which a large amount of oxygen is adsorbed on the surface of the oxide, which can combine with hydrogen at a certain te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
Inventor 赵喆周浩郭强胜刘志福
Owner SHANGHAI INST OF TECH
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