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Exposed (001) crystal face titanium dioxide/titanium carbide nanosheet as well as preparation method and application thereof

A technology of titanium dioxide and titanium carbide, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of application limitations, weak photocatalytic performance, etc., achieve excellent conductivity and improve separation efficiency Effect

Pending Publication Date: 2021-11-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, the two-dimensional transition metal carbide Ti 3 C 2 Good adsorption properties for organic dyes such as rhodamine B and methyl orange have been widely reported, and Ti 3 C 2 It can be used as a cocatalyst to effectively improve the photocatalytic performance of semiconductor photocatalysts, however, Ti 3 C 2 The photocatalytic performance itself is very weak, which limits its application

Method used

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  • Exposed (001) crystal face titanium dioxide/titanium carbide nanosheet as well as preparation method and application thereof
  • Exposed (001) crystal face titanium dioxide/titanium carbide nanosheet as well as preparation method and application thereof
  • Exposed (001) crystal face titanium dioxide/titanium carbide nanosheet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Step 1: Add MAX phase ceramic powder Ti 3 AlC 2 Add it into the HF solution at a concentration of 0.1g / mL, stir at room temperature for 27 hours to obtain a reaction solution, wash the reaction solution with deionized water and ethanol to a pH of 6, and then vacuum dry it at 60°C for 12 hours to obtain ML-Ti 3 C 2 Powder;

[0048] Step 2: Take 1g ML-Ti 3 C 2 Disperse in 40mL deionized water, ultrasonically break at room temperature for 100min, and the ultrasonic power is 70W, to obtain Ti 3 C 2 MXene solution, the Ti 3 C 2 The MXene solution was collected by centrifugation and dried under vacuum at 60 °C for 12 h to obtain Ti 3 C 2 MXene.

[0049] Step 3, take 150mgTi 3 C 2 Add MXene to 30mL HCl solution with a concentration of 1mol / L, and add 0.33gNaBF at the same time 4 As a crystal surface control agent, stir for 30 minutes, ultrasonic for 10 minutes, then transfer to a polytetrachlorethylene hydrothermal reaction kettle for hydrothermal reaction at ...

Embodiment 2

[0051] Step 1: Add MAX phase ceramic powder Ti 3 AlC 2 Add HF solution at a concentration of 0.1 g / mL, stir at room temperature for 27 hours to obtain a reaction solution, centrifuge the reaction solution with deionized water and ethanol to pH 7, and then vacuum-dry it at 60°C for 12 hours to obtain ML-Ti 3 C 2 ;

[0052] Step 2: Take 1g ML-Ti 3 C 2 Disperse in 40mL deionized water, ultrasonically break at room temperature for 100min, and the ultrasonic power is 70W, to obtain Ti 3 C 2 MXene solution, the Ti 3 C 2 The MXene solution was collected by centrifugation and dried under vacuum at 60 °C for 12 h to obtain Ti 3 C 2 MXene.

[0053] Step 3, take 200mgTi 3 C 2 Add MXene to 30mL HCl solution with a concentration of 1mol / L, and add 0.33gNaBF at the same time 4 As a crystal surface control agent, stir for 30 minutes, ultrasonic for 10 minutes, then transfer to a polytetrachlorethylene hydrothermal reaction kettle for hydrothermal reaction at 160°C for 12 hou...

Embodiment 3

[0055] Step 1: Add MAX phase ceramic powder Ti 3 AlC 2 Add it into the HF solution at a concentration of 0.1g / mL, stir at room temperature for 27 hours to obtain a reaction solution, wash the reaction solution with deionized water and ethanol to a pH of 6, and then vacuum dry it at 60°C for 12 hours to obtain ML-Ti 3 C 2 ;

[0056] Step 2: Take 1g ML-Ti 3 C 2 Disperse in 40mL deionized water, ultrasonically break at room temperature for 100min, and the ultrasonic power is 70W, to obtain Ti 3 C 2 MXene solution, the Ti 3 C 2 The MXene solution was collected by centrifugation and dried under vacuum at 60 °C for 12 h to obtain Ti 3 C 2 MXene.

[0057] Step 3, take 250mgTi 3 C 2 Add MXene to 30mL HCl solution with a concentration of 1mol / L, and add 0.33gNaBF at the same time 4 As a crystal surface control agent, stir for 30 minutes, ultrasonic for 10 minutes, then transfer to a polytetrachlorethylene hydrothermal reaction kettle for hydrothermal reaction at 160°C ...

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Abstract

The invention provides an exposed (001) crystal face titanium dioxide / titanium carbide nanosheet and a preparation method and application thereof, and the preparation method comprises the following steps: step 1, dispersing titanium carbide MXene powder and a crystal face control agent in an HCl solution to obtain a precursor solution; and 2, carrying out a hydrothermal reaction on the precursor solution at 140-180 DEG C to obtain a reaction solution, separating the precipitate in the reaction solution, and conducting washing and drying to obtain the exposed (001) crystal face titanium dioxide / titanium carbide nanosheet. The degradation of antibiotics and organic dyes under near-infrared light is realized due to the Ti3C2 surface plasmon polariton effect in the TiO2 / Ti3C2 nanosheet, and the synergistic effect of the separation efficiency of a photon-generated carrier of TiO2 and the Ti3C2 surface plasmon polariton effect, so that the TiO2 / Ti3C2 nanosheet has a degradation effect on the antibiotics and the organic dyes under visible light and simulated sunlight.

Description

technical field [0001] The invention belongs to the field of MXene-based photocatalytic functional materials, and specifically relates to a titanium dioxide / titanium carbide nanosheet with an exposed (001) crystal face and a preparation method and application thereof. Background technique [0002] In recent years, solar photocatalysis technology has attracted extensive attention due to its potential application in alleviating environmental pollution and energy shortage. [0003] The family of graphene-like two-dimensional materials—transition metal carbides, nitrides, or carbonitrides (MXenes) has gradually developed into a photothermal catalytic material due to its large specific surface area, good chemical stability, and electrical conductivity. The general structural formula of MXenes is M n+1 x n T x , where M represents early transition metal elements (such as Ti, V, Nb and other elements), X represents C or N elements, and T represents surface functional groups (suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/02C02F1/30C02F101/30B01J35/00
CPCB01J27/22C02F1/30C02F2101/30C02F2101/308C02F2305/10B01J35/40B01J35/39Y02W10/37
Inventor 谈国强王勇王敏张碧鑫杨迁任慧君夏傲刘文龙
Owner SHAANXI UNIV OF SCI & TECH
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