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Ag3PO4/MXene composite photocatalyst and preparation method thereof

A catalyst and recombination light technology, applied in the field of photocatalytic materials, can solve the problem of single preparation, achieve the effect of improving photocatalytic activity, excellent photocatalytic activity, and reducing carrier recombination rate

Active Publication Date: 2021-10-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But current technology is limited to the preparation of a single tetrahedral silver phosphate

Method used

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preparation example Construction

[0022] The invention discloses an Ag 3 PO 4 / MXene composite photocatalyst, composed of silver phosphate and MXene, deposited on the surface of MXene by tetrahedral silver phosphate stacked by 30-100nm small particles to form a heterojunction structure; the Ag 3 PO 4 The preparation method of / MXene composite photocatalyst, the steps are as follows:

[0023] Disperse MXene in deionized water and ultrasonically treat it for 30min to obtain MXene dispersion; 10mLAgNO 3 Aqueous solution was added to it, stirred for 0.5~2h, then added 10mLKH 2 PO 4 aqueous solution, after stirring evenly, drop in H 2 o 2 solution, stirred for 0.5-2 hours, completed the in-situ oxidation reaction to obtain the reactant, the reactant was centrifuged to collect the solid, and the obtained solid was washed three times with deionized water and ethanol, and then freeze-dried to obtain Ag 3 PO 4 / MXene composite photocatalyst.

[0024] Specifically, the MXene nanosheets are Ti 2 CTx or Ti 3 C ...

Embodiment 1

[0031] 1.2g of Ti 2 CTx was dispersed in deionized water and ultrasonically treated for 30 min to obtain Ti 2 CTx dispersion; 0.3gAgNO 3 Add 10mL of deionized water, after it is completely dissolved, add Ti 2 Stir in the CTx dispersion for 1h; add 0.6gKH 2 PO 4 Add 10mL of deionized water, after it is completely dissolved (K 2 HPO 4 The mass concentration of the aqueous solution is 6%), add the above-mentioned dispersion liquid, after stirring evenly, drop into 0.5mL, 36%H 2 o 2 solution, stirred for 0.5h, completed the in-situ oxidation reaction to obtain the reactant, the reactant was centrifuged to collect the solid, and the obtained solid was washed 3 times with deionized water and ethanol, and then freeze-dried to obtain Ag 3 PO 4 / Ti 2 CTx composite photocatalyst.

[0032] Adopt the method as in the embodiment, measure the Ag that the present embodiment makes 3 PO 4 / Ti 2 The CTx composite photocatalyst has a photocatalytic degradation rate of 97% in 30 minu...

Embodiment 2

[0034] 0.7g of Ti 3 C 2 Tx was dispersed in deionized water and ultrasonically treated for 30min to obtain Ti 3 C 2 Tx dispersion; 0.4gAgNO 3 Add 10mL of deionized water, after it is completely dissolved, add Ti 3 C 2 Stir in the Tx dispersion for 2h; add 0.55gKH 2 PO 4 Add 10mL of deionized water, after it is completely dissolved (K 2 HPO 4 The mass concentration of the aqueous solution is 5.5%), add the above-mentioned dispersion liquid, after stirring evenly, drop into 1mL, 24%H 2 o 2 solution, stirred for 2 hours, completed the in-situ oxidation reaction to obtain the reactant, the reactant was centrifuged to collect the solid, and the obtained solid was washed 3 times with deionized water and ethanol, and then freeze-dried to obtain Ag 3 PO 4 / Ti 3 C 2 Tx composite photocatalyst.

[0035] Adopt the method as in the embodiment, measure the Ag that the present embodiment makes 3 PO 4 / Ti 3 C 2 The Tx composite photocatalyst has a photocatalytic degradation...

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Abstract

The invention discloses an Ag3PO4 / MXene composite photocatalyst and a preparation method thereof, belonging to the technical field of photocatalytic materials. The preparation method comprises the following steps: 1) uniformly dispersing MXene in water to obtain an MXene dispersion liquid, and uniformly dispersing AgNO3 in water to obtain an aqueous AgNO3 solution; and 2) firstly adding the obtained aqueous AgNO3 solution into the obtained MXene dispersion liquid, conducting uniform dispersing, then adding an aqueous KH2PO4 solution, conducting uniform dispersing, then adding a H2O2 solution, carrying out an in-situ oxidation reaction, growing tetrahedral Ag3PO4 with a (111) surface on the surface of MXene, performing centrifuging after the reaction is finished, collecting a solid, cleaning the obtained solid, and drying the solid to prepare the Ag3PO4 / MXene composite photocatalyst. The Ag3PO4 / MXene composite photocatalyst prepared by the preparation method disclosed by the invention has excellent photocatalytic activity under visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials and relates to an Ag 3 PO 4 / MXene composite photocatalyst and its preparation method. Background technique [0002] Semiconductor-based photocatalysis provides a new way to address the challenges of environmental pollution and energy crisis, and has become one of the most promising technologies in green chemistry. Unfortunately, most widely used semiconducting photocatalytic materials are only effective under UV light irradiation, making it difficult to industrialize. Therefore, the development of highly efficient visible-light-driven photocatalysts is a major challenge at present. [0003] Silver phosphate (Ag 3 PO 4 ) is a promising photocatalyst due to its high photocatalytic activity under visible light irradiation, however, Ag 3 PO 4 In practical applications, there are also problems such as poor stability and rapid recombination of photogenerated carriers. Various t...

Claims

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Application Information

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IPC IPC(8): B01J27/22C02F1/30C02F101/38
CPCB01J27/22C02F1/30C02F2101/38C02F2305/10C02F2305/023B01J35/39Y02W10/37
Inventor 张文博李思纯李莉马建中鲍艳
Owner SHAANXI UNIV OF SCI & TECH