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Chlorine bismuth oxyiodide (010)/graphene heterostructure and preparation method and application thereof

A technology of bismuth oxychloroiodide and bismuth oxyiodide is applied in the field of bismuth oxychloroiodide/graphene heterojunction and its preparation, which can solve the problems of increased preparation cost, complicated preparation process, long reaction time, etc. Catalytic performance, simple process, good exposure effect

Inactive Publication Date: 2019-01-25
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the preparation process is complicated, the reaction time is long, and the preparation cost is increased.
The crystal structure of BiOI can also be seen along the c-axis direction, the double I – Ion layer and [Bi 2 o 2 ] 2+ The layers are arranged alternately, forming a layered structure, but the double-layer arrangement I – It belongs to the non-bonding force binding, the binding force is weak, and it is easy to dissociate. Therefore, exploring the bismuth oxyiodide (010) with preferential exposure on the (010) surface is an important means to improve its stability.

Method used

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  • Chlorine bismuth oxyiodide (010)/graphene heterostructure and preparation method and application thereof
  • Chlorine bismuth oxyiodide (010)/graphene heterostructure and preparation method and application thereof
  • Chlorine bismuth oxyiodide (010)/graphene heterostructure and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Step 1, take 0.07g of commercial graphene and add it into deionized water, ultrasonically disperse it at 30°C for 20min, and make A solution;

[0026] Step 2, 5mmol of Bi(NO 3 ) 3 ·5H 2 O was added to 2.0 mol / L HNO 3 , stirred at 80°C until completely dissolved, and made into liquid B;

[0027] Step 3, take 4.94mmol KI and 0.06mmol KCl and dissolve them in deionized water to make solution C;

[0028] Step 4, add the prepared liquid A dropwise to liquid B to form liquid D, wherein Bi(NO 3 ) 3 ·5H 2 The molar ratio of O to (KI+KCl) is 1:1;

[0029] Step 5, slowly drop 2.0 mol / L NaOH solution into D liquid, and adjust the pH value of D liquid to 6;

[0030] Step 6, adding liquid C to liquid D to form liquid E;

[0031] Step 7: Pour liquid E into the reactor, heat the reactor to 170°C, and keep it warm for 24 hours;

[0032] Step 8: After the reactor is cooled, the precipitate in the reactor is washed with absolute ethanol and deionized water in sequence, and drie...

Embodiment 2

[0034] Step 1, 5mmol of Bi(NO 3 ) 3 ·5H 2 O was added to 2.0 mol / L HNO 3 , stirred at 80°C until completely dissolved, and made into liquid A;

[0035] Step 2, take 4.94mmol KI and 0.06mmol KCl and dissolve them in deionized water to make solution B;

[0036] Step 4, add the prepared liquid A dropwise to liquid B to form liquid C, wherein Bi(NO 3 ) 3 ·5H 2 The molar ratio of O to (KI+KCl) is 1:1;

[0037] Step 5, slowly drop 2.0 mol / L NaOH solution into liquid C, and adjust the pH value of liquid C to 6;

[0038] Step 6, adding liquid B to liquid C to form liquid D;

[0039] Step 7, pour liquid D into the reactor, heat the reactor to 170°C, and keep it warm for 24 hours;

[0040] Step 8: After the reactor is cooled, the precipitate in the reactor is washed with absolute ethanol and deionized water in sequence, and dried at 80° C. for 24 hours to obtain bismuth oxychloroiodide (010).

Embodiment 3

[0042] Step 1, 5mmol of Bi(NO 3 ) 3 ·5H 2O was added to 2.0 mol / L HNO 3 , stirred at 80°C until completely dissolved, and made into liquid A;

[0043] Step 2, dissolve 5mmol KI in deionized water to make solution B;

[0044] Step 4, add the prepared liquid A dropwise to liquid B to form liquid C, wherein Bi(NO 3 ) 3 ·5H 2 The molar ratio of O and KI is 1:1;

[0045] Step 5, slowly drop 2.0 mol / L NaOH solution into liquid C, and adjust the pH value of liquid C to 6;

[0046] Step 6, adding liquid B to liquid C to form liquid D;

[0047] Step 7, pour liquid D into the reactor, heat the reactor to 170°C, and keep it warm for 24 hours;

[0048] Step 8: After the reactor is cooled, the precipitate in the reactor is washed with absolute ethanol and deionized water in sequence, and dried at 80° C. for 24 hours to obtain bismuth oxyiodide (010).

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Abstract

The invention discloses a chlorine bismuth oxyiodide (010) / graphene heterostructure and a preparation method and application thereof. The problem that existing bismuth oxyiodide (001) is likely to bedissociated, weak in optical absorption property and low in photocatalytic efficiency is solved. Firstly, dispersion liquid of graphene is prepared, then the dispersion liquid of graphene is mixed with a precursor solution of chlorine bismuth oxyiodide (010), and chlorine bismuth oxyiodide (010) / graphene powder with chlorine bismuth oxyiodide and graphene compounded is generated through a hydrothermal method. Effective separation of light-generated electrons and holes of chlorine bismuth oxyiodide (010) is promoted through the conductive capacity of graphene, the recombination probability of the light-generated electrons and the holes is reduced, and therefore the photocatalysis capacity of bismuth oxyiodide (010) is improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic water treatment, and relates to a bismuth iodide oxychloride (010) / graphene heterojunction and a preparation method and application thereof. Background technique [0002] Photocatalytic pollutant treatment refers to the photocatalytic degradation of organic pollutants through catalysts under the action of light, and can achieve mineralization treatment of toxic and harmful organic pollutants in the environment. It is a technology with the most potential to solve environmental problems in human society. one. The newly developed semiconductor photocatalyst technology can use sunlight to generate clean energy hydrogen and oxygen, and can also degrade and remove organic pollutants. However, the current research on photocatalytic materials still faces the problem of limiting their practical application. Traditional semiconductor photocatalytic materials with narrow photoresponse range and high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J37/10C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J27/06B01J37/10C02F2305/10C02F2101/308C02F2101/40C02F2101/36C02F2101/38B01J35/33B01J35/39
Inventor 单连伟权巍王泽禹张媛媛程主明许春焕
Owner HARBIN UNIV OF SCI & TECH
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