Ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst, preparation method and application thereof

A bi4o5br2, visible light technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as poor catalytic activity, poor photostability, and low solar energy conversion efficiency

Active Publication Date: 2020-12-22
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of poor catalytic activity, low solar energy conversion efficiency and poor photostability in the current visible light catalytic system

Method used

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  • Ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst, preparation method and application thereof
  • Ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst, preparation method and application thereof
  • Ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst, preparation method and application thereof

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Experimental program
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Embodiment 1

[0035] Embodiment 1, preparation and application experiment of visible light catalyst

[0036] 1. Preparation

[0037] Follow the steps below to prepare ultra-thin Bi 4 o 5 Br 2 / Bi 2 o 2 CO 3 Visible light catalyst:

[0038] (1) Add 2.3mL of ammonia water to 148mL of ultrapure water and stir (rotating at 450 rpm) to form solution A;

[0039] (2) Add 0.2 mmol potassium bromide or sodium bromide to the above solution A, stir for 30 minutes (rotating speed is 450 rpm), and obtain solution B;

[0040] (3) 0.25g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) Dissolve in 10 mL of dilute acetic acid solution, and add the solution dropwise to solution B, stir overnight (stirring time is 12 hours, rotating speed is 450 rpm), to obtain suspension C;

[0041] (4) Centrifuge the suspension C at 8000rpm, wash it with ultra-pure water until it becomes neutral (wash about 6 times, and centrifuge for 3 minutes each time), dry it in an oven at 60°C for 5 hours, and grind it int...

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Abstract

The invention discloses an ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst, a preparation method and application thereof. The ultrathin Bi4O5Br2/Bi2O2CO3 visible-light-induced photocatalyst is prepared by a simple room-temperature co-crystallization method. The preparation method comprises the following steps: (1) adding ammonia water into water, and stirring to obtain a solution A; (2) adding a certain amount of potassium bromide or sodium bromide into the solution A, and stirring for a period of time to obtain a solution B; (3) dissolving a bismuth salt into a dilute acetic acid solution, dropwise adding into the solution B, and stirring overnight to obtain a turbid liquid C; and (4) centrifuging, washing and drying the turbid liquid C to obtain the visible-light-inducedphotocatalyst. According to the invention, the photocatalyst has very high removal efficiency and light stability on refractory toxic and harmful organic pollutants under the neutral room-temperaturevisible light condition, and has a very good solid-liquid separation effect.

Description

technical field [0001] The invention belongs to the field of water treatment functional materials, in particular to an ultra-thin Bi 4 o 5 Br 2 / Bi 2 o 2 CO 3 Visible light catalyst and its preparation method and application. Background technique [0002] Emerging organic pollutants are frequently detected in global water resources and have been confirmed to be potentially harmful to ecology and human health, thus attracting global attention. There are 860 emerging organic pollutants that have been studied or discussed, including pharmaceuticals and personal care products, pesticides, endocrine disruptors, etc. Due to the diversity and low concentration levels of emerging organic pollutants, their effective removal requires combined water treatment processes, including traditional secondary activated sludge processes and tertiary treatments such as advanced oxidation processes, membrane separation, and adsorption processes. Engineering nanomaterials can promote the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01J27/06B01J37/03C02F1/30C02F101/34C02F101/36
CPCB01J27/232B01J27/06B01J35/004B01J35/0013B01J37/038C02F1/30C02F2305/10C02F2101/345C02F2101/36Y02W10/37
Inventor 张丽丽胡春石宝友
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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