Bismuth titanate nanosheet/bismuth oxide chloride nanosheet composite photocatalyst in three-dimensional structure and preparation method of composite photocatalyst

A technology of bismuth oxychloride nanometers and nanosheets, which is applied in the field of photocatalysis, can solve the problems of failing to prepare heterojunction photocatalysts, and achieve the effects of high visible light utilization, high transmission efficiency, and complete crystallization

Inactive Publication Date: 2017-08-04
JIANGSU UNIV
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Problems solved by technology

Tian et al. (Acs Cataly., 2015, 5(8), 4530) dispersed P25 in 10M NaOH solution, reacted at 180°C for 48 hours, and then washed with sulfuric acid to prepare TiO 2 nanorods, however a certain amount of TiO 2 Nanorods, bismuth nitrate, and sodium molybdate were dispersed in ethylene glycol solution, and hydrothermally reacted at 160°C for 24 hours to obtain a three-dimensional Bi 2 MoO 6 Nanosheet / TiO 2 Nanorod heterojunction photocatalysts; however, none of these methods have been able to prepare three-dimensional structured bismuth titanate nanosheets / bismuth oxychloride nanosheet heterojunction photocatalysts

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 0.34g of bismuth oxide, 0.087g of titanium dioxide, 1.359g of potassium chloride and 1.067g of sodium chloride in a mortar, and their molar ratios are 2:3:50:50. After grinding evenly, the obtained light yellow The powder was placed in a quartz boat, calcined at 800° C. for 2 h, and after cooling to room temperature, the product was washed and dried to obtain bismuth titanate nanosheets. Take 1mmol of the obtained bismuth titanate nanosheets and disperse them in 30mL of ethanol, and then weigh 0.4mmol of bismuth nitrate and 0.4mmol of sodium chloride and disperse them in 10mL of ethylene glycol solution, mix and stir the two solutions until uniform, transfer to Put it in a hydrothermal kettle and put it in an oven to react at 160°C for 24 hours. After cooling to room temperature, it was washed and dried by centrifugation to obtain a bismuth titanate nanosheet / bismuth oxychloride nanosheet composite photocatalyst.

[0026] figure 1 For the XRD diffraction pattern o...

Embodiment 2

[0028] Take 0.34g of bismuth oxide, 0.087g of titanium dioxide, 0.815g of potassium chloride and 0.640g of sodium chloride in a mortar, and their molar ratios are 2:3:30:30 respectively. After grinding evenly, the obtained light yellow The powder was placed in a quartz boat, calcined at 800° C. for 2 h, and after cooling to room temperature, the product was washed and dried to obtain bismuth titanate nanosheets. Take 1mmol of the obtained bismuth titanate nanosheets and disperse them in 30mL of ethanol. In addition, weigh 1mmol of bismuth nitrate and 1mmol of sodium chloride and disperse them in 10mL of ethylene glycol solution. In the still, put it in an oven at 140°C for 10 hours, and after cooling to room temperature, wash and dry it by centrifugation.

Embodiment 3

[0030] Take 0.34g of bismuth oxide, 0.087g of titanium dioxide, 1.087g of potassium chloride and 0.854g of sodium chloride in a mortar, and their molar ratios are 2:3:40:40 respectively. After grinding evenly, the obtained light yellow The powder was placed in a quartz boat, calcined at 800° C. for 2 h, and after cooling to room temperature, the product was washed and dried to obtain bismuth titanate nanosheets. Take 1mmol of the obtained bismuth titanate nanosheets and disperse them in 30mL of ethanol. In addition, weigh 0.4mmol of bismuth nitrate and 1.2mmol of sodium chloride and disperse them in 10mL of ethylene glycol solution. Mix and stir the two solutions until uniform, transfer to In a hydrothermal kettle, put it in an oven at 150°C to react for 18 hours, and after cooling to room temperature, wash and dry by centrifugation.

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Abstract

The invention belongs to the technical field of photocatalysis and relates to a bismuth titanate nanosheet / bismuth oxide chloride nanosheet composite photocatalyst in a three-dimensional structure and a preparation method of the composite photocatalyst. The bismuth titanate nanosheet / bismuth oxide chloride nanosheet composite photocatalyst in the three-dimensional structure is prepared by preparing a bismuth titanate nanosheet by a molten salt method and vertically growing a bismuth oxide chloride nanosheet on the surface of the bismuth titanate nanosheet by taking bismuth nitrate and sodium chloride as raw materials by a hydrothermal method. A dye photocatalytic degradation experimental proves that the prepared three-dimensional composite photocatalyst has very good photocatalytic activity, and the performance of the composite photocatalyst is much better than that of the single bismuth titanate nanosheet and the single bismuth oxide chloride nanosheet; a reaction condition is easy to control; a technology and a flow are simple and convenient; the energy consumption is low; large-scale production is easy to realized; and the composite photocatalyst and the method have good economic and environmental beneficial effects.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and relates to a three-dimensional bismuth titanate nanosheet / bismuth oxychloride nanosheet [0002] Sheet composite photocatalyst and preparation method thereof; specifically relates to a method for preparing two-dimensional bismuth titanate nanosheets by a molten salt method, and then preparing a three-dimensional bismuth titanate nanosheet / bismuth oxychloride nanosheet composite photocatalyst by a solvothermal method . Background technique [0003] Semiconductor visible light catalysis, as an environmentally friendly technology with great potential, has received extensive attention in the treatment of organic wastewater, especially high-concentration and refractory wastewater in recent years. Among them, photocatalysts with three-dimensional structures have attracted extensive attention in recent years due to their larger specific surface area, faster electron migration, smaller electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C02F1/30C02F101/30
CPCB01J27/135B01J35/004B01J35/023C02F1/30C02F2101/30
Inventor 钱坤谢吉民夏莉魏巍姜志锋孙伟吕霞
Owner JIANGSU UNIV
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