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Method for preparing nanorod-shaped high bismuth oxyiodide photocatalyst

A photocatalyst and nanorod-like technology, applied in the field of materials science, can solve the problems of difficult control of the reaction process, high production cost, energy consumption, etc., and achieve the effects of good photocatalytic performance, short reaction time and low cost of raw materials

Inactive Publication Date: 2018-07-13
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the invention provides a kind of method for preparing nano-rod-shaped bismuth oxyperiodide photocatalyst, the described method for preparing nano-rod-shaped bismuth oxyperiodide photocatalyst will solve the problems in the prior art. Preparation of rod-shaped Bi 5 o 7 The method of 1 nanometer photocatalyst is time-consuming, energy-consuming, causes the production cost higher, the technical problem that reaction process is difficult to control

Method used

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  • Method for preparing nanorod-shaped high bismuth oxyiodide photocatalyst
  • Method for preparing nanorod-shaped high bismuth oxyiodide photocatalyst

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Embodiment 1

[0029] (1) 0.97g of Bi(NO 3 ) 3 ·5H 2 O was added to a beaker containing 10ml of ethanol, and ultrasonicated at 100Hz for 10 minutes to obtain suspension A.

[0030] (2) Dissolve 0.332 g of KI in 20 ml of deionized water to obtain solution B, slowly add solution B to the above suspension A, and react with magnetic stirring for 15 minutes to obtain suspension C.

[0031] (3) Dissolve 8 g of NaOH in 50 ml of deionized water to obtain a 4 mol / L NaOH solution.

[0032] (4) Slowly add the above-mentioned NaOH solution dropwise into the magnetically stirred suspension C, stop adding the NaOH solution when the pH of the suspension C measured by a pH gun is 14, then stir at room temperature for 2 hours, and collect the precipitate by centrifugation The material was washed three times with deionized water and absolute ethanol, and dried at 80°C for 8 hours to obtain rod-shaped Bi 5 o 7 I.

[0033] (5) For the synthesized rod-shaped Bi 5 o 7 I carry out X-ray diffraction analysi...

Embodiment 2

[0035] (1) 0.97g of Bi(NO 3 ) 3 ·5H 2 O was added to a beaker containing 10ml of deionized water, and ultrasonicated at 80HZ for 15 minutes to obtain suspension A.

[0036] (2) Dissolve 0.332 g of KI in 20 ml of deionized water to obtain solution B, slowly add solution B to the above suspension A, and react with magnetic stirring for 15 minutes to obtain suspension C.

[0037](3) Dissolve 8 g of NaOH in 50 ml of deionized water to obtain a 4 mol / L NaOH solution.

[0038] (4) Slowly add the above-mentioned NaOH solution dropwise into the magnetically stirred suspension C, stop adding the NaOH solution when the pH of the suspension C measured by a pH gun is 13, then stir at room temperature for 2 hours, and collect the precipitate by centrifugation The material was washed three times with deionized water and absolute ethanol, and dried at 80°C for 8 hours to obtain rod-shaped Bi 5 o 7 I.

[0039] (5) For the synthesized rod-like Bi 5 o 7 I carry out X-ray diffraction ana...

Embodiment 3

[0041] (1) 0.97g of Bi(NO 3 ) 3 ·5H 2 O was added to a beaker containing 20ml of ethanol, and ultrasonicated at 100HZ for 10 minutes to obtain suspension A.

[0042] (2) Dissolve 0.332 g of KI in 20 ml of deionized water to obtain solution B, slowly add solution B to the above suspension A, and react with magnetic stirring for 15 minutes to obtain suspension C.

[0043] (3) Dissolve 4 g of NaOH in 50 ml of deionized water to obtain a 2 mol / L NaOH solution.

[0044] (4) Slowly add the above-mentioned NaOH solution dropwise into the magnetically stirred suspension C, stop adding the NaOH solution when the pH of the suspension C measured by a pH gun is 13, then stir at room temperature for 2 hours, and collect the precipitate by centrifugation The material was washed three times with deionized water and absolute ethanol, and dried at 80°C for 8 hours to obtain rod-shaped Bi 5 o 7 I.

[0045] (5) For the synthesized rod-like Bi 5 o 7 I carry out X-ray diffraction analysis ...

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Abstract

The invention provides a method for preparing a nanorod-shaped high bismuth oxyiodide photocatalyst. The method comprises the following steps: ultrasonically dispersing bismuth nitrate pentahydrate inethanol or water, adding a potassium iodide solution into a suspension, magnetically stirring to obtain the suspension, then controlling the pH of the suspension to be 11-14 by a sodium hydroxide solution, performing a magnetic stirring reaction to obtain Bi5O7I, and filtering, washing and drying the obtained product to obtain the rod-shaped Bi5O7I. The rod-shaped Bi5O7I prepared with a chemicalprecipitation method under normal-temperature and normal-pressure conditions has the characteristics of uniform morphology, large specific surface area and strong stability. The nanorod-shaped high bismuth oxyiodide photocatalyst can effectively remove elemental mercury from flue gas in a power plant through photocatalytic oxidation, the mercury removing efficiency under irradiation of an LED lampcan reach 50%, and the efficiency is obviously higher than that of the conventional TiO2 (17%) photocatalytic material. A synthesis method is simple, low in cost and low in pollution, needs of national sustainable development are met, and the synthesis method is a novel environment-friendly preparation method.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a photocatalyst, in particular to a method for preparing a nanorod-shaped bismuth periodiodide photocatalyst. Background technique [0002] Environmental pollution and energy shortage are huge problems facing mankind at present, and they are major issues that must be considered first in the implementation of sustainable development strategies in my country and the world. In recent years, photocatalytic air purification technology has attracted the attention of researchers due to its safety, durability, and high efficiency. It has broad application prospects in the fields of clean energy production and environmental purification. At present, an important factor limiting the wide application of photocatalysis in clean energy production and environmental purification is the low photocatalytic activity of photocatalysts under visible light conditions, so the development of highly effic...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J35/10B01J37/03B01D53/86B01D53/64
CPCB01D53/007B01D53/8665B01J27/06B01J37/031B01D2257/602B01D2259/802B01D2258/0283B01J35/23B01J35/612B01J35/39
Inventor 吴江程好强徐凯纪政许卫星曲晨昊齐雪梅赵丽丽朱良君路程
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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