Preparation method of titanium dioxide nanowire/two-dimensional layered titanium carbide composite material

A titanium dioxide, two-dimensional layered technology, applied in the field of nano-functional material preparation, can solve the problems of single morphology, poor hydrophilicity and small specific surface area.

Inactive Publication Date: 2016-03-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A single two-dimensional nanometer MXene-Ti 3 C 2 Small specific surface area, single shape, poor hydrophilicity, and difficult photocatalytic degradation

Method used

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  • Preparation method of titanium dioxide nanowire/two-dimensional layered titanium carbide composite material
  • Preparation method of titanium dioxide nanowire/two-dimensional layered titanium carbide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Refined powder

[0023] Refinement of ternary layered Ti with a purity greater than 97 wt% by high energy ball milling 3 AlC 2 Ceramic powder, ball milling conditions: the mass ratio of ball stone, mixing material and absolute ethanol is 10:1:1, the ball milling speed is 400r / min, the high energy ball milling time is 4h, and then the obtained solid-liquid mixture is baked at 50°C Dry to obtain Ti with a particle size of 10±2μm 3 AlC 2 Ceramic powder; see figure 1 , figure 1 The XRD pattern in the middle shows that the phase of the obtained powder is Ti 3 AlC 2 Crystals with very little impurity content.

[0024] 2) Two-dimensional layered nanomaterial MXene-Ti 3 C 2 preparation of

[0025] With the obtained Ti in step 1) 3 AlC 2 The ceramic powder is immersed in HF acid solution, in which 5gTi 3 AlC 2 The powder was immersed in 100mL of 40wt% HF acid solution for 48 hours; magnetic stirring, for Ti 3 AlC 2 After the ceramic powder is corroded, it is c...

Embodiment 2

[0029] 1) Refined powder

[0030] Refinement of ternary layered Ti with a purity greater than 97 wt% by high energy ball milling 3 AlC 2 Ceramic powder, ball milling conditions: the mass ratio of ball stone, mixing material and absolute ethanol is 10:1:1, the ball milling speed is 400r / min, the high energy ball milling time is 2h, and then the obtained solid-liquid mixture is baked at 50°C Dry to obtain Ti with a particle size of 56 ± 5 μm 3 AlC 2 ceramic powder;

[0031] 2) Two-dimensional layered nanomaterial MXene-Ti 3 C 2 preparation of

[0032] With the obtained Ti in step 1) 3 AlC 2 The ceramic powder is immersed in the HF acid solution, in which 2gTi 3 AlC 2 The powder was immersed in 50mL mass concentration of 45wt% HF acid solution for 12h; magnetic stirring, for Ti 3 AlC 2 After the ceramic powder is corroded, it is centrifugally cleaned with deionized water until the pH is 5-6, and the obtained solid sample is dried at room temperature to obtain a two-di...

Embodiment 3

[0036] 1) Refined powder

[0037] Refinement of ternary layered Ti with a purity greater than 97 wt% by high energy ball milling 3 AlC 2 Ceramic powder, ball milling conditions: the mass ratio of ball stone, mixing material and absolute ethanol is 10:1:1, the ball milling speed is 400r / min, the high energy ball milling time is 2h, and then the obtained solid-liquid mixture is baked at 50°C Dry to obtain Ti with a particle size of 75 μm 3 AlC 2 ceramic powder;

[0038] 2) Two-dimensional layered nanomaterial MXene-Ti 3 C 2 preparation of

[0039] With the obtained Ti in step 1) 3 AlC 2 The ceramic powder is immersed in the HF acid solution, in which 2gTi 3 AlC 2 The powder was immersed in 40mL mass concentration 49wt% HF acid solution for 6h; magnetic stirring, for Ti 3 AlC 2 After the ceramic powder is corroded, it is centrifugally cleaned with deionized water until the pH is 5-6, and the obtained solid sample is dried at room temperature to obtain a two-dimensiona...

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Abstract

The invention provides a preparation method of a titanium dioxide nanowire / two-dimensional layered titanium carbide composite material. The preparation method comprises the following steps: high energy ball milling is carried out on high-purity ternary layered Ti3AlC2 powder for grain refinement; two-dimensional layered nano-material MXene-Ti3C2 is prepared by hydrofluoric acid eroding treatment; and hydro-thermal treatment is carried out on MXene-Ti3C2 and P25 under alkaline condition to make nanowire-type TiO2 to be loaded with MXene-Ti3C2, so as to obtain the nanowire-type TiO2 / MXene-Ti3C2 nanocomposite material. Nontoxic raw materials are used, the preparation process is simple, the technology is controllable, and costs are low. The prepared two-dimensional layered MXene-Ti3C2 is uniform, TiO2 nanowires are long and thin and uniformly distributed. Thus, the composite material has large specific surface area, good conductivity, good photocatalytic performance and good biocompatibility, and is applicable to the fields of photocatalysis, wastewater treatment, lithium ion battery, biosensor and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano functional materials, in particular to a preparation method of a titanium dioxide nanowire / two-dimensional layered titanium carbide composite material. Background technique [0002] Two-dimensional layered nanocarbides are materials with a graphene-like structure, which are obtained by selective etching of ternary layered compounds. In recent years, this material has attracted extensive attention from researchers because of its strong conductivity, good flexibility, low diffusion coefficient, high capacitance, single-layer atomic sheet structure and good stability. Studies have shown that two-dimensional layered nano-TiC has important application prospects in the fields of electrochemical capacitors, lithium batteries, Pb atomic adsorption, hydrogen storage and noble metal catalyst supports. [0003] Titanium dioxide has a wide range of applications in solar cells, photocatalysis, pho...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J35/00B82Y30/00
Inventor 朱建锋吕文静汤祎杨晨辉王芬曹敏娟李学林卫丹
Owner SHAANXI UNIV OF SCI & TECH
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