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A kind of nanocomposite catalyst and its preparation and application

A nanocomposite and catalyst technology, applied in the field of photocatalytic materials, can solve the problems of low catalytic efficiency

Active Publication Date: 2021-08-24
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, researchers have focused on Bi 5 o 7 I have done a lot of research work, but the relevant patents and technologies all have low catalytic efficiency. So far, there is no Cu 2 O / Bi 5 o 7 I Report on Heterogeneous Composite Catalysts

Method used

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  • A kind of nanocomposite catalyst and its preparation and application
  • A kind of nanocomposite catalyst and its preparation and application
  • A kind of nanocomposite catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, the preparation of nanocomposite catalyst

[0028] Step one, Bi 5 o 7 Preparation of I

[0029] (1) Accurately weigh 2.42535g (0.005mol) bismuth nitrate pentahydrate (Bi(NO3) 5H2O) and dissolve it in 25 milliliters of deionized water with magnetic stirring for 1 hour to form a clear solution and record it as solution A, 0.83g (0.005mol ) Potassium iodide (KI) was dissolved in 25 ml of deionized water and magnetically stirred for 1 hour to form a clear solution, which was recorded as solution B.

[0030] (2) Add solution B dropwise to solution A and stir to form a red precipitate. Transfer the formed precipitate and solution to an autoclave and keep at 130°C for 20 hours.

[0031] (3) Precipitate red, wash and dry to obtain BiOI nanomaterials.

[0032] (4) heating the BiOI nanomaterial in the reactor to 400°C at a rate of 5°C per minute and keeping it warm for 5 hours to obtain a nano-Bi5O7I catalyst;

[0033] Step two, Cu 2 O / Bi 5 o7 Preparation of ...

Embodiment 2

[0040] Embodiment 2, the degradation effect of nanocomposite catalyst to rhodamine B solution

[0041] Cu prepared in this implementation 2 O / Bi 5 o 7 The pattern analysis of the XRD of I is as figure 1 shown. For the Cu prepared in this implementation 2 O / Bi 5 o 7 SEM analysis and detection of I figure 2 , it can be seen from the figure that the size of the composite nanoparticles is about 500-1.5 μm. For the Cu prepared in this implementation 2 O / Bi 5 o 7 The UV-Vis spectroscopic analysis of I as image 3 shown. Take 0.5g of prepared different materials Cu 2 O. Bi 5 o 7 I, 10.0% Cu 2 O / Bi 5 o 7 I, 18.23% Cu 2 O / Bi 5 o 7 I, 25% Cu 2 O / Bi 5 o 7 I, and 30.83% Cu 2 O / Bi 5 o 7 I Heterojunction composite nanomaterials, added to 100mL, 20mg / L rhodamine B solution, placed under a 500W ultraviolet-visible lamp for photocatalytic reaction, the distance between the light source and the reaction liquid surface was 20cm. Cu after photocatalysis for 60 minutes...

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Abstract

The invention discloses a nanocomposite catalyst and its preparation and application. The photocatalyst material is made of Cu 2 O and Bi 5 o 7 The nano-catalyst formed by I composition, its preparation method is as follows: First, bismuth nitrate pentahydrate is stirred and dissolved in ethylene glycol and stirred, then potassium iodide is added, separated, washed, and dried to obtain BiOI, and the material is heated to 500° C. to decompose to obtain Bi 5 o 7 I Nanomaterials. Preparation of Cu by Oxidation-Reduction Method 2 O nano-catalyst, copper acetate dihydrate was stirred and dissolved in deionized water, and the obtained Bi 5 o 7 I solid powder was added to deionized water ultrasonic dispersion, added enough glucose solution to cool to room temperature, centrifuged to obtain precipitated solid, obtained Cu 2 O / Bi 5 o 7 I nanocomposite material, the present invention prepares the heterojunction catalyst with efficient visible light catalytic activity with low cost and simple technique. The catalyst can improve the degradation efficiency of rhodamine B (RhB) under solar light, improve the photocatalytic performance, and has potential application prospects.

Description

technical field [0001] The present invention is a Cu 2 O / Bi 5 o 7 A nanocomposite catalyst and its preparation and application belong to the field of photocatalytic materials. Background technique [0002] With the development of my country's economy and society, my country's dye industry has developed rapidly. my country discharges about 900,000 to 1 million tons of various dye wastewater every day, and dye wastewater has become one of the key sources of environmental pollution. The dye industry has a variety of varieties and complex processes. The wastewater contains a large amount of organic matter, has the characteristics of high CODCr, deep color, strong acidity and alkalinity, and has always been a difficult problem in wastewater treatment. Therefore, the development of new water treatment materials and new processes, and the control of toxic organic pollutants have become one of the key issues to be solved in the environmental field. After decades of extensive and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06B01J35/00C02F1/30C02F101/38
CPCC02F1/30B01J27/06C02F2101/38C02F2305/10B01J35/23
Inventor 夏咏梅胡可军
Owner JIANGSU UNIV OF TECH