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Preparation method of black Bi4Ti3O12 photocatalyst

A photocatalyst, black technology, applied in the field of black Bi4Ti3O12 photocatalyst prepared by solvothermal method, can solve the problems of high cost, complicated operation steps, time-consuming, etc., and achieve the effect of high crystallinity, simple process and process, and low energy consumption

Inactive Publication Date: 2017-08-04
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the complicated operation steps, time-consuming, high cost in the prior art, and there is no black Bi 4 Ti 3 o 12 To provide a method for preparing a black bismuth titanate photocatalyst with good photocatalytic activity

Method used

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  • Preparation method of black Bi4Ti3O12 photocatalyst
  • Preparation method of black Bi4Ti3O12 photocatalyst
  • Preparation method of black Bi4Ti3O12 photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.34g of bismuth oxide and 0.087g of titanium dioxide in a mortar, grind them evenly, place the obtained light yellow powder in a quartz boat, calcinate at 800°C for 2h, cool to room temperature, wash and dry the product to obtain white titanium bismuth acid. Disperse the obtained white bismuth titanate powder in ethanol solution, stir evenly, transfer it to a hydrothermal kettle, and put it in an oven at 180°C for 12 hours of reaction. After cooling to room temperature, it is centrifugally washed and dried to obtain black bismuth titanate.

[0024] figure 1 The XRD diffraction pattern of the prepared sample, the peaks at each position in the figure belong to bismuth titanate, and no other impurity peaks appear. Compared with the standard JCPDS card (21-1272), it can be determined that it is Bi with good crystallinity. 4 Ti 3 o 12 Powder.

[0025] figure 2 As a scanning electron microscope photo, it can be seen from the figure that it is different from the t...

Embodiment 2

[0029] Weigh 0.34g of bismuth oxide and 0.022g of titanium dioxide in a mortar, grind evenly, place the obtained light yellow powder in a quartz boat, calcinate at 800°C for 2h, cool to room temperature, wash and dry the product to obtain white titanium bismuth acid. Disperse the obtained white bismuth titanate powder in the ethanol solution, stir evenly, transfer it to a hydrothermal kettle, put it in an oven at 140°C for 10 hours, and after cooling to room temperature, wash it with centrifugal water and dry it.

Embodiment 3

[0031]Weigh 0.34g of bismuth oxide and 0.043g of titanium dioxide in a mortar, grind them evenly, place the obtained light yellow powder in a quartz boat, calcinate at 500°C for 0.5h, cool to room temperature, wash and dry the product to obtain a white Bismuth titanate. Disperse the obtained white bismuth titanate powder in ethanol solution, stir evenly, transfer it to a hydrothermal kettle, put it in an oven at 140°C for 10 hours, and after cooling to room temperature, wash it with centrifugal water and dry it.

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Abstract

The invention belongs to the technical field of preparation of chemical materials and provides a preparation method of a black Bi4Ti3O12 photocatalyst. The preparation method comprises the following steps: preparing traditional bismuth titanate by a solid-phase method; and then preparing the black Bi4Ti3O12 photocatalyst by a solvothermal method. An experiment of photocatalytic degradation of dye proves that with good visible light absorbing ability, the prepared black Bi4Ti3O12 photocatalyst has high photocatalytic activity and has higher performance than that of traditional white bismuth titanate. The preparation method disclosed by the invention has the advantages of simple preparation process, low preparation cost, high efficiency, high practicality, easiness in large-scale production and good economic benefits and environment-friendly benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical material preparation, and specifically relates to a method for preparing traditional bismuth titanate by a solid-phase method, and then preparing black Bi by a solvothermal method. 4 Ti 3 o 12 photocatalytic method. Background technique [0002] Photocatalysis has attracted widespread attention due to its applications in the environment and energy, but a bottleneck factor restricting its practical application is photon utilization. The commonly used photocatalyst titanium dioxide (TiO 2 ) is white, by performing Ti on its surface or bulk phase 3+ Doping or creating oxygen vacancies, so as to realize the controllable adjustment of its spectral absorption range, and prepare a new type of black TiO 2 Visible photocatalytic materials. Wei et al. (Chem. Eng. J., 2016, 299, 120) dissolved tetrabutyl titanate and urea in ethanol solution, prepared precursor powder by sol-gel method, and then prepa...

Claims

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Application Information

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IPC IPC(8): B01J23/18B01J37/08C01G29/00
CPCC01G29/00B01J23/002B01J23/18B01J37/08B01J35/39
Inventor 钱坤谢吉民夏莉魏巍姜志锋孙伟吕霞
Owner JIANGSU UNIV
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