Biochar-mediated Ag3PO4/alpha-Fe2O3 heterojunction visible light catalytic composite material and preparation method thereof

A composite material and biochar technology, applied in the field of photocatalysis, can solve problems such as the influence of photocatalytic performance

Active Publication Date: 2022-04-08
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Ag 3 PO 4 The photocatalytic performance will be affected by factors such as "photocorrosion", catalyst stability and electron-hole pair recombination.

Method used

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  • Biochar-mediated Ag3PO4/alpha-Fe2O3 heterojunction visible light catalytic composite material and preparation method thereof
  • Biochar-mediated Ag3PO4/alpha-Fe2O3 heterojunction visible light catalytic composite material and preparation method thereof
  • Biochar-mediated Ag3PO4/alpha-Fe2O3 heterojunction visible light catalytic composite material and preparation method thereof

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Embodiment 1

[0032] 1. Materials and methods

[0033] 1.1 Reagents

[0034] Ferrous sulfate heptahydrate (FeSO 4 ·7H 2 O), sodium dihydrogen phosphate dihydrate (NaH 2 PO 4 2H 2 O), silver nitrate (AgNO 3 ), ethanol (C 2 h 5 OH), ammonia (NH 3 ·H 2 O), rhodamine B, tert-butanol (TBA), disodium ethylenediaminetetraacetic acid (EDTA-Na) and hydrochloric acid (HCl) were provided by Sinopharm Chemical Reagent Co., Ltd. Tetracycline (TC), ciprofloxacin (CIP), benzoquinone (BQ), furfuryl alcohol (C 5 h 6 o 2 ), 5,5-dimethyl-1-pyrrolidine N-oxide (DMPO) and 2,2,6,6-tetramethyl-4-piperidone (TEMP) were purchased from Aladdin Corporation. All reagents were of analytical grade and were not purified. Working solutions were prepared using 18.25 MΩ deionized water.

[0035] 1.2 Preparation of catalyst

[0036] Biochar (BC): Pine wood flour was rinsed thoroughly with deionized water to remove impurities and dried at 80°C. in continuous CO 2 Dry biomass was pyrolyzed in a tube furnace a...

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Abstract

The invention relates to the technical field of photocatalysis, in particular to a biochar-mediated Ag3PO4/alpha-Fe2O3 heterojunction visible light catalytic composite material and a preparation method thereof.The biochar and a FeSO4 solution are mixed and stirred, the obtained turbid liquid is placed in a high-pressure reaction kettle to react, and after cooling and centrifugation, vacuum drying is conducted to obtain a Fe2O3-BC composite material; ammonia water is dropwise added into an AgNO3 solution until precipitates are completely dissolved, the Fe2O3-BC composite material is added after magnetic stirring is conducted under the dark condition, the Fe2O3-BC composite material is stirred with a magnetic stirrer in the dark after ultrasonic treatment, then a NaH2PO4 solution is dropwise added, a reaction is conducted in the dark, an obtained mixture is centrifuged, solid matter is collected and subjected to vacuum drying, and the Fe2O3-BC composite material is obtained. And the charcoal mediated Ag3PO4/alpha-Fe2O3 heterojunction visible light catalysis composite material is obtained. The material can efficiently degrade dyes and antibiotics in water.

Description

technical field [0001] The present invention relates to the technical field of photocatalysis, more specifically to biochar-mediated Ag 3 PO 4 / α-Fe 2 o 3 Heterojunction visible light photocatalytic composite material and preparation method. Background technique [0002] Organic dyes and antibiotics are common organic pollutants in wastewater that are harmful to human health. Photocatalytic technology has attracted more attention than traditional technologies (such as adsorption, Fenton oxidation, etc.) due to its excellent ability to degrade organic pollutants in wastewater into less toxic intermediates or carbon dioxide. Compared to UV light activation of catalysts to generate reactive oxygen species (ROS), photocatalytic oxidation technology is more favored due to its lower cost and greater feasibility. In this sense, it is necessary to find an efficient catalyst that can be activated by visible light. Currently, Ag 3 PO 4 It is a new type of semiconductor catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J37/10C02F1/30C02F101/30
Inventor 施俊王小治王圣森王杰尹微琴
Owner YANGZHOU UNIV
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