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Bi2WO6 nano-composite fiber visible photocatalyst and preparation method thereof

A nanocomposite fiber and nanofiber technology, applied in the field of nanomaterials and catalytic materials, can solve the problems of low photocatalytic activity, cumbersome and complicated preparation methods, poor controllability and repeatability, and achieve high-efficiency catalytic degradation performance and dispersion effect Excellent, simple and easy-to-use effect

Inactive Publication Date: 2014-04-02
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Problems solved by technology

[0005] Chinese patent 200810197020.7 discloses a visible light catalyst Bi 2 WO 6 The preparation method of nano powder, the powder has better crystallinity, smaller particle size and larger specific surface area, so it has better visible light catalytic performance when the dye is degraded, but there are still some problems in the application process. Disadvantages of easy reunion
[0006] Chinese patent 201110441585.7 discloses a microwave hydrothermal method

Method used

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  • Bi2WO6 nano-composite fiber visible photocatalyst and preparation method thereof

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Example Embodiment

[0025] A kind of Bi 2 WO 6 Nano composite fiber visible light catalyst and preparation method thereof, the Bi 2 WO 6 Nanocomposite fiber visible light catalyst includes adsorption area (carbon nanofiber) and visible light catalytic active area (nano Bi 2 WO 6 ), its preparation method includes the following steps:

[0026] (1) Design the polymer p(AN-g-PEO) with coordination with bismuth ions. According to the structure of bismuth ions, N and O can form complexes with metal bismuth ions through coordination bonds, and choose to contain nitrile and carboxyl groups. Polymers with other groups are used as fiber-forming polymers. The main chain of the designed graft is polyacrylonitrile, which is used as the precursor of carbon nanofibers; the regular branch of the designed graft is polyoxyethylene, which is used as nano-Bi 2 WO 6 Template molecule

[0027] (2) The preparation of the modified carbon nanofiber visible light catalyst includes the following steps: preparing an electrostati...

Example Embodiment

[0029] Example 1

[0030] A kind of Bi 2 WO 6 Nano composite fiber visible light catalyst and preparation method thereof, it includes the following steps:

[0031] 1) Measure 2.06 mmol of bismuth nitrate and add it to 20 ml of N-N dimethylformamide, and ultrasonically shake and disperse for 1 hour.

[0032] 2) Measure 1.03 mmol of sodium tungstate and add it to the above solution, and ultrasonically shake and disperse for 1 hour.

[0033] 3) Add 2gp(AN-g-PEO) to the above solution to prepare a 10% p(AN-g-PEO) solution, stir for twelve hours and mix uniformly to make a spinning solution.

[0034] 4) Transfer the prepared spinning solution into a 10ml syringe, set it up, and perform electrospinning. The spinning condition is that the receiving distance is 200mm based on the distance between the tip of the capillary tube and the receiving plate, a voltage of 19kV is applied, the flow rate of silk liquid is 0.2ml / hour, and the receiving time is 12 hours. What is collected on the receiving...

Example Embodiment

[0037] Example 2

[0038] A kind of Bi 2 WO 6 Nano composite fiber visible light catalyst and preparation method thereof, it includes the following steps:

[0039] 1) Measure 2.06 mmol of bismuth nitrate and add it to 20 ml of N-N dimethylformamide, and ultrasonically shake and disperse for 1 hour.

[0040] 2) Measure 1.03 mmol of sodium tungstate and add it to the above solution, and ultrasonically shake and disperse for 1 hour.

[0041] 3) Add 2gp(AN-g-PEO) to the above solution to prepare a 10% p(AN-g-PEO) solution, stir for twelve hours and mix uniformly to make a spinning solution.

[0042] 4) Transfer the prepared spinning solution into a 10ml syringe, set it up, and perform electrospinning. The spinning condition is that the receiving distance is 180mm based on the distance between the tip of the capillary tube and the receiving plate, a voltage of 20kV is applied, the flow rate of silk liquid is 0.2 ml / hour, and the receiving time is 10 hours. What is collected on the receivin...

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Abstract

The invention discloses a Bi2WO6 nano-composite fiber visible photocatalyst and preparation method thereof, and the Bi2WO6 nano-composite fiber visible photocatalyst comprises an adsorption zone (carbon nanofiber) and a visible photocatalytic activity zone (nano Bi2WO6). The invention has the characteristics of low energy band, high quantum efficiency, large specific surface area, high stability, easy recovery, environment protection, etc., and can catalyze and degrade methylene blue with high efficiency. The degradation rate with xenon lamp irradiation for 2.5 h reaches to 95.17%; the preparation method comprises the following steps: designing and synthesizing polymer p (AN-g-PEO) which is coordinated with bismuth ions, and preparing the modified carbon nanofiber visible light catalyst. In the preparation process, the reaction condition of ultrasonic vibration for dispersion is mild, and the invention has the advantages of easy operation, excellent dispersion effect and stable dispersion.

Description

technical field [0001] The invention relates to the technical field of nanomaterials and catalytic materials, specifically a Bi 2 WO 6 Nanocomposite fiber visible light catalyst and preparation method thereof. Background technique [0002] At present, the dye wastewater treatment methods mainly include adsorption method, biodegradation method, electrolysis method and coagulation precipitation method, etc., but most of them cannot meet the needs of modern society. Adsorption purification has small adsorption capacity, large equipment volume, limited adsorbent capacity, frequent regeneration, low equipment utilization, and cannot completely eliminate pollutants; biodegradation takes a long time but is often difficult to completely eliminate pollutants; electrolysis The current efficiency is still low, the energy consumption is high, the efficiency of the electrocatalytic degradation reactor is low, and the processing cost is high, so it is not suitable for large-scale applic...

Claims

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Application Information

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IPC IPC(8): B01J23/31B01J37/34C02F1/30
Inventor 刘新华李红章吴筱徐珍珍
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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