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Full-spectrum response double-doped lanthanum fluoride/attapulgite upconverting composite photocatalytic material and preparation method and application thereof

The technology of composite photocatalysis and attapulgite is applied in the field of double-doped lanthanum fluoride/attapulgite up-conversion composite photocatalytic material and its preparation, which can solve the problems of limited light response range, etc. The effect of expanding the photoresponse range and promoting separation

Active Publication Date: 2019-01-08
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rare earth-doped fluoride up-conversion composite photocatalytic material can improve the utilization rate of sunlight. CN201810340657.0 discloses a praseodymium-doped cerium fluoride / attapulgite up-conversion composite photocatalytic material and its preparation method and application, but the The catalyst can only realize the upconversion of visible light in sunlight to ultraviolet light, and does not involve near-infrared light, so the photoresponse range is limited, and a direct contact heterostructure is formed between praseodymium-doped cerium fluoride and attapulgite , the catalytic effect can be expected

Method used

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  • Full-spectrum response double-doped lanthanum fluoride/attapulgite upconverting composite photocatalytic material and preparation method and application thereof
  • Full-spectrum response double-doped lanthanum fluoride/attapulgite upconverting composite photocatalytic material and preparation method and application thereof
  • Full-spectrum response double-doped lanthanum fluoride/attapulgite upconverting composite photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 0.85g La(NO 3 ) 3 ·6H 2 O, 0.22g Yb(NO 3 ) 3 ·5H 2 O, 0.0057g Tm (NO 3 ) 3 ·6H 2 O, 0.27g NH 4 F, 1.00g of hydrochloric acid modified ATP was added to deionized water for ultrasonic dissolution, and magnetically stirred for 30 minutes to make it evenly mixed, and the pH of the system was adjusted to 4-5, and then transferred to a microwave hydrothermal kettle for microwave hydrothermal heating, set The temperature is 180°C, the time is set to 1.5h, and the sample is obtained after the reaction;

[0021] The preparation steps of the hydrochloric acid-modified ATP are: adding the original ATP (1.00g) into 1mol / L hydrochloric acid solution (50ml) at 60°C, stirring vigorously for 15h, centrifuging and drying, and set aside.

[0022] (2) Wash and centrifuge the sample prepared in step (1), collect the precipitate, then dry the precipitate and grind it to obtain 50% ytterbium-thulium double-doped lanthanum fluoride / attapulgite up-conversion composite photocat...

Embodiment 2

[0035] (1) 0.34g La(NO 3 ) 3 ·6H 2 O, 0.089g Yb(NO 3 ) 3 ·5H 2 O, 0.0023g Tm(NO 3 ) 3 ·6H 2 O, 0.11 g NH 4 F, 1.00g of hydrochloric acid-modified ATP was added to deionized water for ultrasonic dissolution, and magnetically stirred for 30 minutes to make it evenly mixed, and the pH of the system was adjusted to 4-5. Then transfer it to a microwave hydrothermal kettle for microwave hydrothermal heating, set the temperature to 180°C, and set the time to 1.5h;

[0036] (2) Wash and centrifuge the sample prepared in step (1), then dry the sample and grind it to obtain the ytterbium-thulium double-doped lanthanum fluoride / attapulgite up-conversion composite photocatalytic material 20% La 0.795 T m 0.005 Yb 0.2 f 3 / ATP.

[0037] Subsequent detection method is as embodiment 1, but in order to prove that the prepared catalyst has catalytic activity under infrared, ultraviolet and visible light, embodiment 2 is equipped with a filter on the xenon lamp to filter out ultrav...

Embodiment 3

[0046] (1) 0.51g La(NO 3 ) 3 ·6H 2 O, 0.13g Yb(NO 3 ) 3 ·5H 2 O, 0.0034g Tm(NO 3 ) 3 ·6H 2 O, 0.16g NH 4 F, 1.00g of hydrochloric acid-modified ATP was added to deionized water for ultrasonic dissolution, and magnetically stirred for 30 minutes to make it evenly mixed, and the pH of the system was adjusted to 4-5. Then transfer it to a microwave hydrothermal kettle for microwave hydrothermal heating, set the temperature to 180°C, and set the time to 1.5h;

[0047] (2) Wash and centrifuge the sample prepared in step (1), then dry the sample and grind it to prepare the ytterbium-thulium double-doped lanthanum fluoride / attapulgite up-conversion composite photocatalytic material 30% La 0.795 T m 0.005 Yb 0.2 f 3 / ATP.

[0048] Subsequent detection methods are as in Example 1 and Example 3. Filters are used to filter out ultraviolet light and visible light on a xenon lamp, and the catalyst is irradiated under infrared light.

[0049] Under the irradiation of infrared ...

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Abstract

The invention belongs to the field of photocatalytic materials, and particularly relates to a double-doped lanthanum fluoride / attapulgite upconverting composite photocatalytic material and a preparation method and application thereof. The preparation method comprises the following steps: adding La(NO3)3.6H2O, Tm(NO3)3.6H2O, Yb(NO3)3.5H2O, NH4F and hydrochloric acid-modified ATP into deionized water respectively for dissolving, magnetically stirring for 30min for fully mixing, and adjusting the pH value of a system to 4-5; then, transferring to a microwave hydrothermal kettle for a reaction, reacting for 1-2h at the set power of 400W and the set temperature of 160-200 DEG C, centrifuging a prepared sample, washing by using deionized water, then drying the sample, and grinding to obtain a ytterbium-doped and thulium-doped lanthanum fluoride / attapulgite upconverting composite photocatalytic material. The composite photocatalytic material is applied to simulation of photocatalytic gasolinedenitrification, and the denitrification rate can reach 85% after 3h light irradiation.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a full-spectrum response ytterbium-thulium double-doped lanthanum fluoride / attapulgite up-conversion composite photocatalytic material and its preparation method and application. Background technique [0002] Photocatalytic technology has the characteristics of mild reaction conditions, high efficiency, low energy consumption and no secondary pollution. Not many. At present, more and more attention is paid to the removal of nitrogen-containing compounds in oil at home and abroad, so photocatalytic technology for oil denitrification has very important research significance and application value. [0003] The traditional catalytic hydrogenation denitrification technology is currently the most widely used denitrification process with the most mature treatment technology. However, this process needs to be carried out under high temperature and high pressure condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J35/10C02F1/30C02F1/28C02F101/38
CPCC02F1/281C02F1/30B01J27/138C02F2101/38C02F2305/10B01J35/61B01J35/60B01J35/39
Inventor 李霞章马素娟左士祥严向玉姚超刘文杰
Owner CHANGZHOU UNIV
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