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Praseodymium-doped cerium fluoride/attapulgite up-conversion composite photocatalytic material and preparation method and application thereof

A composite photocatalysis and attapulgite technology, which is applied in the field of praseodymium doped cerium fluoride/attapulgite up-conversion composite photocatalytic material and its preparation, can solve the problems of low utilization rate of sunlight and the like, and achieves reduction of photogenerated electrons and empty space. The compounding of holes, improving the utilization rate, and overcoming the effect of uneven heating

Active Publication Date: 2018-09-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its wide band gap, it can only respond to ultraviolet light, and ultraviolet light only accounts for 5% of sunlight, so the utilization rate of sunlight is very low.

Method used

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  • Praseodymium-doped cerium fluoride/attapulgite up-conversion composite photocatalytic material and preparation method and application thereof
  • Praseodymium-doped cerium fluoride/attapulgite up-conversion composite photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) 0.26g Pr(NO 3 ) 3 ·6H 2 O, 0.61g Ce(NO 3 ) 3 ·6H 2 O, 0.16g NH 4 F, 0.90g of ATP was added into deionized water and ultrasonically dissolved, the pH of the system was adjusted to 4-5, and the beaker was shaken to make it evenly mixed. Then transfer it to a microwave hydrothermal kettle for microwave hydrothermal heating, set the temperature to 160°C, and set the time to 70min;

[0024] (2) Centrifuge the sample prepared in step (1) with a centrifuge, and then wash it with water. Then the sample is dried and ground to obtain the praseodymium-doped cerium fluoride / attapulgite up-conversion composite photocatalytic material 40%Pr 0.3 Ce 0.7 f 3 / ATP.

[0025] The obtained sample is characterized by X-ray powder diffraction to characterize its structure and composition, and utilizes a transmission electron microscope to observe the TEM picture of the sample, and the 40% Pr prepared according to the process of Example 1 0.3 Ce 0.7 f 3 The XRD pattern of / ATP...

Embodiment 2

[0031] (1) 0.09g Pr(NO 3 ) 3 ·6H 2 O, 0.78g Ce(NO 3 ) 3 ·6H 2 O, 0.20g NH 4 F, 1.92g ATP was added into deionized water and ultrasonically dissolved, the pH of the system was adjusted to 4-5, and the beaker was shaken to make it evenly mixed. Then transfer it to a microwave hydrothermal kettle for microwave hydrothermal heating, set the temperature to 160°C, and set the time to 70min;

[0032] (2) Centrifuge the sample prepared in step (1) with a centrifuge, and then wash it with water. Then the sample is dried and ground to obtain the praseodymium-doped cerium fluoride / attapulgite up-conversion composite photocatalytic material 20%Pr 0.1 Ce 0.9 f 3 / ATP.

[0033] Subsequent testing is as in Example 1, and the desulfurization rate is 87%.

Embodiment 3

[0035] (1) 0.34g Pr(NO 3 ) 3 ·6H 2 O, 0.52g Ce(NO 3 ) 3 ·6H 2 O, 0.13g NH 4 F, 1.75g ​​ATP was added into deionized water and ultrasonically dissolved, and the pH of the system was adjusted to 4-5, and the beaker was shaken to make it evenly mixed. Then transfer it to a microwave hydrothermal kettle for microwave hydrothermal heating, set the power to 400W, set the temperature to 160°C, and set the time to 70min;

[0036] (2) Centrifuge the sample prepared in step (1) with a centrifuge, and then wash it with water. Then the sample is dried and ground to obtain the praseodymium-doped cerium fluoride / attapulgite up-conversion composite photocatalytic material 20%Pr 0.4 Ce 0.6 f 3 / ATP.

[0037] Subsequent testing is as in Example 1, and the desulfurization rate is 89%.

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Abstract

The invention belongs to the field of new chemical materials, and particularly relates to a praseodymium-doped cerium fluoride / attapulgite up-conversion composite photocatalytic material and a preparation method and application thereof. Pr(NO3)3.6H2O, Ce(NO3)3.6H2O, NH4F and attapulgite are added into deionized water for dissolution respectively, the system pH is adjusted to 4-5, and magnetic stirring is conducted to make the mixture evenly mixed; the mixture is transferred to a microwave hydrothermal reactor for reaction, the power is set to be 400 W, the reaction is carried out for 1-3 h, the temperature is set at 150-170 DEG C, a prepared sample is subjected to centrifugalization separation, then the sample is dried and ground, and thus the praseodymium-doped cerium fluoride / attapulgiteup-conversion composite photocatalytic material is prepared. The material can be applied to the field of photocatalytic desulfuration, and under sunlight for 3 h, the desulfulration rate can reach 95%.

Description

technical field [0001] The invention belongs to the field of new chemical materials, and in particular relates to a praseodymium-doped cerium fluoride / attapulgite up-conversion composite photocatalytic material, a preparation method and application thereof. Background technique [0002] In recent years, with the increasing consumption of fuel oil, the combustion of sulfur compounds contained in it emits a large amount of SO x . Sulfur oxides (SOx) produced by fuel combustion x ) has always been one of the main sources of acid rain and atmospheric haze, seriously affecting the environment and human health. Therefore, the production of low-sulfur gasoline is an inevitable trend. At present, the sulfur content in catalytic cracking gasoline (FCC gasoline) used in my country is 500-1600ppm, and the sulfur-containing compounds that are difficult to handle mainly include thiophene, alkyl-substituted thiophene and benzothiophene. To remove sulfur compounds contained in fuels, v...

Claims

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Application Information

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IPC IPC(8): B01J37/10B01J37/34B01J27/138C10G53/08
CPCC10G53/08B01J27/138B01J37/10B01J37/343C10G2300/202B01J35/39
Inventor 李霞章何承溧左士祥姚超刘文杰
Owner CHANGZHOU UNIV
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