Preparation method and application for bismuth titanate nanosheet

A technology of nanosheets and bismuth titanate, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc. Removal and other problems, to achieve the effect of short processing flow, good visible light response ability, and regular powder shape

Active Publication Date: 2018-09-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses a large amount of organic matter in the preparation process, the cost is high, and it is difficult to ensure the complete removal of organic matter in the subsequent calcination process

Method used

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  • Preparation method and application for bismuth titanate nanosheet
  • Preparation method and application for bismuth titanate nanosheet
  • Preparation method and application for bismuth titanate nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Bi 4 Ti 3 o 12 Catalyst preparation

[0023] Add 0.5g of P25 into 1L of deionized water, ultrasonically disperse for 30min (ultrasonic frequency is 3kHz), and obtain precursor solution A.

[0024] 0.02mol Bi(NO 3 ) 3 ·5H 2 O was added to 250ml of 40% glacial acetic acid by volume, stirred at room temperature for 10min at a stirring speed of 100r / min to obtain a transparent and clear precursor solution B.

[0025] Add solution B dropwise to solution A, stir continuously for 6 hours and then let it stand still; the powder obtained after suction filtration, cleaning and drying is calcined in a tube furnace at 550°C for 5 hours to obtain nanosheet Bi 4 Ti 3 o 12 .

[0026] (2) Bi 4 Ti 3 o 12 Catalyst degradation RhB experiment:

[0027] Add 200mg of catalyst to 200ml of RhB solution with a concentration of 10ppm, ultrasonically disperse in the dark for 10min, transfer the reaction solution to a photocatalytic box and stir for 60min to reach adsorption-desor...

Embodiment 2

[0034] (1) Bi 4 Ti 3 o 12 Catalyst preparation

[0035] Add 0.65g of P25 into 2.95L of deionized water, and ultrasonically disperse for 40min (ultrasonic frequency is 30kHz) to obtain precursor solution A.

[0036] 0.025mol Bi(NO 3 ) 3 ·5H 2 O was added to 50ml of glacial acetic acid with a concentration of 60% by volume, and stirred at room temperature for 10min at a stirring speed of 200r / min to obtain a transparent and clear precursor solution B.

[0037]Add solution B dropwise to solution A, stir continuously for 8 hours and then let it stand still; the powder obtained after suction filtration, cleaning and drying is calcined in a tube furnace at 600°C for 3.5 hours to obtain nanosheet Bi 4 Ti 3 o 12 .

[0038] (2) Bi 4 Ti 3 o 12 Catalyst degradation RhB experiment

[0039] Add 200mg of catalyst to 200ml of RhB solution with a concentration of 10ppm, ultrasonically disperse in the dark for 10min, transfer the reaction solution to a photocatalytic box and stir ...

Embodiment 3

[0043] (1) Bi 4 Ti 3 o 12 Catalyst preparation

[0044] Add 0.8g of P25 into 2.95L of deionized water, and ultrasonically disperse for 45min (ultrasonic frequency is 10kHz) to obtain precursor solution A.

[0045] 0.03mol Bi(NO 3 ) 3 ·5H 2 O was added to 50ml of glacial acetic acid with a concentration of 70% by volume, stirred at room temperature for 15min at a stirring speed of 300r / min, and a transparent and clear precursor solution B was obtained.

[0046] Add solution B dropwise to solution A, stir continuously for 12 hours and then let it stand still; the powder obtained after suction filtration, cleaning and drying is calcined in a tube furnace at 650°C for 2 hours to obtain nanosheet Bi 4 Ti 3 o 12 .

[0047] (2) Bi 4 Ti 3 o 12 Catalyst degradation RhB experiment

[0048] Add 200mg of catalyst to 200ml of RhB solution with a concentration of 10ppm, ultrasonically disperse in the dark for 10min, transfer the reaction solution to a photocatalytic box and sti...

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Abstract

The invention discloses a preparation method and application for a bismuth titanate nanosheet, and belongs to the field of nano material preparation and photocatalysis application. The method comprises the following steps: using bismuth nitrate pentahydrate (Bi(NO3)3.H2O) and TiO2(P25) as raw materials, and respectively using glacial acetic acid and deionized water as a positive solvent and a negative solvent, carrying out steps of mixing and stirring, filtering, washing, calcining and the like, preparing a nanosheet-like bismuth titanate photocatalyst, wherein the nanosheet-like bismuth titanate photocatalyst has the excellent photocatalytic performance to rhodamine B (RhB) under visible light. The method is simple without involving strong acid, strong base and the like, gentle in reaction condition, and suitable for large-scale industrial production. In addition, the prepared catalyst is small and uniform in granularity, high-efficient and non-toxic, and has an extensive applicationprospect in the water treatment field.

Description

technical field [0001] The invention discloses a preparation method and application of a bismuth titanate nanosheet, belonging to the fields of nanomaterial preparation and photocatalysis application. Background technique [0002] In recent years, visible light-responsive photocatalysis has attracted increasing attention due to its ability to utilize sunlight to remove environmental pollutants. TiO2 is currently one of the most widely studied photocatalysts due to its high activity, low cost, and high availability. However, its large forbidden band width (∼3.2 eV) affects its effective absorption of sunlight and limits its practical application in catalytic reactions in the visible wavelength range. [0003] Bi 4 Ti 3 o 12 It is a typical Aurivillius type compound. Its unique layered crystal structure can promote the generation and separation of photogenerated electron holes, and its band gap is low, and it can be excited in the visible range. Therefore, Bi 4 Ti 3 o 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01J35/02C02F1/30C02F101/30
CPCB01J23/18B01J35/004B01J35/023C02F1/30C02F2101/30
Inventor 鲍瑞刘鹏方东易健宏
Owner KUNMING UNIV OF SCI & TECH
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