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Heterojunction micron box composite photocatalyst as well as preparation method and application thereof

A heterojunction, composite light technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve problems such as soil and water pollution, achieve high-efficiency treatment technology, easy operation, The effect of green environmental protection treatment technology

Inactive Publication Date: 2018-12-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most antibiotics cannot be completely absorbed by the body. About 90% of antibiotics are excreted into the environment in the form of prototype or metabolites through the feces and urine of patients, livestock and poultry, and pollute soil and water through different channels.

Method used

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  • Heterojunction micron box composite photocatalyst as well as preparation method and application thereof
  • Heterojunction micron box composite photocatalyst as well as preparation method and application thereof
  • Heterojunction micron box composite photocatalyst as well as preparation method and application thereof

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preparation example Construction

[0025] A preparation method of a heterojunction micro box composite photocatalyst comprises the following steps:

[0026] Step S1, preparing Fe 2 o 3 Micron box:

[0027] Add the NaOH solution to the FeCl with continuous stirring at 75 °C over 5 min 3 Medium solution, NaOH and FeCl 3 The molar ratio is 2.7:1, the obtained Fe(OH) 3 The gel was continuously stirred at the same temperature of 75°C for 5 minutes, and then aged in a preheated oven at 100°C for 4 days. The red product was collected and washed three times with deionized water and ethanol. The amount of deionized water was such that the solid could be completely dissolved. Yes, then dried overnight at 70°C to give Fe 2 o 3 micron box.

[0028] Step S 2. Preparation of Fe 2 o 3 / BiVO 4 Heterojunction Microbox Composite Photocatalyst:

[0029] Take Bi(NO 3 ) 3 .5H 2 O is dissolved in ethylene glycol in an amount such that Bi(NO 3 ) 3 .5H 2 Until the O is completely dissolved, magnetically stir and ultra...

Embodiment 1

[0035] Step S1, Fe 2 o 3 Preparation of the micron box:

[0036] Add the NaOH solution to the FeCl with continuous stirring at 75 °C over 5 min 3 solution, the obtained Fe(OH) 3 The gel was continuously stirred at the same temperature of 75 °C for 5 min, and then aged in a preheated oven at 100 °C for 4 days. The red product was collected and washed three times with deionized water and ethanol, then dried at 70 °C overnight. That is, get Fe 2 o 3 micron box.

[0037] Step S2, Fe 2 o 3 / BiVO 4 Preparation of Heterojunction Microbox Composite Photocatalyst:

[0038] Take 0.6mmolBi(NO 3 ) 3 .5H 2 O is dissolved in ethylene glycol, magnetically stirred, and ultrasonically dissolved. After the particles are uniform, add the 3mmolFe prepared in the step S1 2 o 3 Powder to obtain mixed test solution 1, magnetically stirred for 1 hour and then left to stand for 1 hour; take ammonium metavanadate and dissolve it in ethylene glycol, slowly add it to mixed test solution 1 ...

Embodiment 2

[0041] Step S1, Fe 2 o 3 Preparation of the micron box:

[0042] Add the NaOH solution to the FeCl with continuous stirring at 75 °C over 5 min 3 In solution, the resulting Fe(OH) 3 The gel was continuously stirred at the same temperature of 75 °C for 5 min, and then aged in a preheated oven at 100 °C for 4 days. The red product was collected and washed three times with deionized water and ethanol, then dried at 70 °C overnight. That is, get Fe 2 o 3 micron box.

[0043] Step S2, Fe 2 o 3 / BiVO 4 Preparation of Heterojunction Microbox Composite Photocatalyst:

[0044] Take 0.75mmolBi(NO 3 ) 3 .5H 2 O is dissolved in ethylene glycol, magnetically stirred, and ultrasonically dissolved. After the particles are uniform, add the 3mmolFe prepared in the step S1 2 o 3 Powder, to obtain mixed test 1, the liquid was magnetically stirred for 1 hour and then left to stand for 1 hour; ammonium metavanadate was dissolved in ethylene glycol, slowly added to mixed test solutio...

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Abstract

The invention provides a heterojunction micron box composite photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: S1, preparing a Fe2O3 micron box; S2, preparing a Fe2O3 / BiVO4 heterojunction micron box composite photocatalyst: dissolving Bi(NO3)3.5H2O in ethylene glycol, stirring particles evenly, adding the Fe2O3 powder prepared in the step S1 so as to obtain a mixed test solution 1, stirring and then standing; dissolving NH4VO3 in the ethylene glycol, slowly adding into the mixed test solution 1, and stirring to obtain a mixed testsolution 2; dissolving urea in the ethylene glycol, slowly adding into the mixed test solution 2, placing in a hot water bath for a certain period of time, and then standing; carrying out centrifugation and impurity removal treatment, then drying, and collecting solid to obtain the Fe2O3 / BiVO4 heterojunction micron box composite photocatalyst. The aim of degrading antibiotic wastewater by using the Fe2O3 / BiVO4 heterojunction micron box composite photocatalyst is achieved. The method does not cause resource waste and formation of additional pollution, and is simple and convenient to operate, thus being a green and environment-friendly efficient treatment technology.

Description

technical field [0001] The invention belongs to the research field of environmental material preparation, and in particular relates to a heterojunction micro-box composite photocatalyst, a preparation method and application thereof. Background technique [0002] Antibiotics are a class of chemicals produced by microorganisms that inhibit or kill other microorganisms at low concentrations. However, most antibiotics cannot be completely absorbed by the body. About 90% of antibiotics are excreted into the environment in the form of prototype or metabolites through the feces and urine of patients, livestock and poultry, and pollute soil and water through different channels. As a typical antibiotic, tetracycline (TC) is widely used in human production activities. When it enters the ecological environment, it may pose a serious threat to the ecological system and human health. Nowadays, the elimination of antibiotics including TC from the environment has become an extremely urgen...

Claims

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Application Information

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IPC IPC(8): B01J23/847C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J23/002B01J23/8472C02F2103/343C02F2101/38C02F2101/34C02F2305/10B01J2523/00B01J35/39B01J2523/54B01J2523/55B01J2523/842
Inventor 陈戎儒吴春霞严必胜
Owner JIANGSU UNIV
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