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Photocatalytic material with high activity under visible light and its preparation method

A photocatalytic material and high-activity technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of no significant improvement in catalytic activity and achieve catalytic The effect is unchanged, the cost is low, and the process is simple

Inactive Publication Date: 2012-11-21
冯亮 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But by doping TiO with a single element 2 The obtained catalytic material has no significant improvement in its catalytic activity in the visible light region

Method used

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  • Photocatalytic material with high activity under visible light and its preparation method
  • Photocatalytic material with high activity under visible light and its preparation method
  • Photocatalytic material with high activity under visible light and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a, 10.0mL of commercially available (purity ≥98%) n-butyl titanate (Ti(OC 4 H 9 ) 4 ) The solution was added dropwise to 85.0 mL of commercially available (purity ≥99%) isopropanol (C 3 H 7 In the OH) solution, stir while dripping. After the dripping is completed, keep stirring the mixed solution at room temperature for 30 minutes. The resulting solution is amorphous TiO 2 Sol, referred to as A solution for short;

[0026] b, H 2 O. Commercially available (purity ≥99%) isopropanol (C 3 H 7 OH) is mixed with three liquids of concentrated nitric acid on the market (concentration 70%) in a volume ratio of 3:3:1, weighing out 7.0mL of the above mixed solution, and then 0.1615g of iron nitrate (Fe(NO 3 ) 3 ·9H 2 O) and 0.2127g erbium nitrate (Er(NO 3 ) 3 ·5H 2 O) Add to 7.0mL of the above-mentioned mixed solution, sonicate for 5 minutes with a 15-watt sonicator at room temperature to prepare the dopant mixed solution, called B solution;

[0027] c. Add solution B to solution A drop...

Embodiment 2

[0033] a, 12.0mL of commercially available (purity ≥98%) n-butyl titanate (Ti(OC 4 H 9 ) 4 ) The solution was added dropwise to 100.0 mL of commercially available (purity ≥99%) isopropanol (C 3 H 7 In the OH) solution, stir while dripping. After the dripping is completed, keep stirring the mixed solution at room temperature for 30 minutes. The resulting solution is amorphous TiO 2 Sol, referred to as A solution for short;

[0034] b, H 2 O. Commercially available (purity ≥99%) isopropanol (C 3 H 7 OH) is mixed with three liquids of concentrated nitric acid on the market (70% concentration) in a volume ratio of 3:3:1, and then 0.1615g of iron nitrate (Fe(NO 3 ) 3 ·9H 2 O) and 0.0705g erbium nitrate (Er(NO 3 ) 3 ·5H 2 O) Add it to 8.0mL of the above mixed solution, sonicate for 5 minutes at room temperature with an sonicator with a power of 15 watts, and the prepared solution is the dopant mixture, referred to as B solution for short;

[0035] c. Add solution B to solution A dropwise a...

Embodiment 3

[0041] a, 10.0mL of commercially available (purity ≥98%) n-butyl titanate (Ti(OC 4 H 9 ) 4 ) The solution was added dropwise to 100.0 mL of commercially available (purity ≥99%) isopropanol (C 3 H 7 In the OH) solution, stir while dripping. After the dripping is completed, keep stirring the mixed solution at room temperature for 30 minutes. The resulting solution is amorphous TiO 2 Sol, referred to as A solution for short;

[0042] b, H 2 O. Commercially available (purity ≥99%) isopropanol (C 3 H 7 OH) is mixed with three liquids of concentrated nitric acid on the market (70% concentration) in a volume ratio of 3:3:1, and then 0.1615g of iron nitrate (Fe(NO 3 ) 3 ·9H 2 O) and 0.2127g erbium nitrate (Er(NO 3 ) 3 ·5H 2 O) Add to 7.0mL of the above-mentioned mixed solution, sonicate for 5 minutes at room temperature with an ultrasonic instrument with a power of 15 watts, and the prepared solution is the dopant mixed solution, referred to as B solution for short;

[0043] c. Add solution ...

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Abstract

The invention relates to a photocatalytic material with high activity under visible light and its preparation method. The photocatalytic material comprises, by mass: 0.8%-3.3% of iron, 0.9%-3.8% of erbium, 4.9%-8.1% of carbon, and the balance TiO2. The preparation method consists of: first adding titanium tetrabutoxide into isopropanol dropwisely to obtain an amorphous TiO2 sol; mixing H2O, isopropanol, and concentrated nitric acid, then adding ferric nitrate and erbium nitrate so as to prepare a dopant mixed solution, which is then added into the amorphous TiO2 sol, thus obtaining a ferric nitrate and erbium nitrate doped TiO2 sol; then, putting the doped TiO2 sol into an oven of 120DEG C and conducting a heat treatment for 4 hours, then taking it out and cooling it to room temperature, thus obtaining an Fe / Er / C-TiO2 suspending solution; carrying out centrifugation to obtain an Fe / Er / C-TiO2 solid; and drying the solid under a temperature of 80-85DEG C, then performing grinding and sieving through a sieve of 50 meshes, and implementing a heat treatment in a muffle furnace for 240 minutes at 450-600DEG C, thus obtaining the photocatalytic material with high activity under visible light. The method provided in the invention has low cost, and the prepared photocatalytic material has a good photocatalytic effect under visible light as well as high stability, and can effectively degrade organic pollutants in water.

Description

Technical field [0001] The invention relates to a high-activity photocatalytic material under visible light and a preparation method thereof, and belongs to the technical field of catalytic materials for the visible light degradation of organic pollutants in water. Background technique [0002] With the development of the industrial process, people's living conditions have undergone earth-shaking changes, and their living standards have greatly improved, but at the same time they have also brought destructive effects on the environment on which people live. Every year, a large amount of dyes, hormones, residual pesticides and other waste water rich in carcinogenic, teratogenic, and mutagenic substances such as benzene rings, amine groups, and azo groups are continuously discharged into rivers and lakes, which not only brings us human health The great threat also has a great impact on the survival of other creatures. Hormonal substances, such as bisphenol A, are widely found in w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C02F1/30C02F101/34
CPCY02W10/37
Inventor 冯亮叶标侯典训
Owner 冯亮