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Hollow-structure biomass charcoal/TiO2 multi-wall tube/CuO photocatalyst and preparation method thereof

A technology of biomass charcoal and photocatalyst, which is applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., which can solve the problems of high management input and cost, secondary pollution, Harsh and other problems, to achieve the effect of no secondary pollution, low cost, efficient and fast removal

Inactive Publication Date: 2018-11-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is more common to use biological methods for low-concentration ammonia nitrogen, but under the condition of high-concentration ammonia nitrogen, biological methods are more harsh on climate, temperature, organic matter concentration and other conditions, and the management input and cost are high; while physical methods often bring secondary pollution , so it is necessary to find efficient, fast, green and environmentally friendly ammonia nitrogen removal methods and materials

Method used

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  • Hollow-structure biomass charcoal/TiO2 multi-wall tube/CuO photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Hollow structure biochar / TiO 2 The preparation method of multi-wall tube / CuO photocatalyst comprises the steps:

[0034] a) Wash the stalks of goosebumps with clean water, dry them and crush them with a pulverizer to keep the particle size at about 1.5 mm, then soak the stalks of goosebumps in 1mol / L acetic acid solution for 2 hours, and wash them with deionized water until neutral , dried in an oven at 100 °C for 5 h to obtain pretreated biomass.

[0035] b) Prepare a titanium isopropoxide solution according to the ratio of titanium isopropoxide: ethanol = 1:2 (volume ratio), dissolve 30 mg of pretreated biomass in 100 mL of titanium isopropoxide solution, sonicate for 20 minutes, and then dry it in a 40°C oven Dry for 4 hours to obtain titanium isopropoxide / mountain stalk.

[0036] c) Put the above-mentioned titanium isopropoxide / mountain stalk in a muffle furnace, heat up to 400°C at a rate of 5°C / min for 2 hours, and obtain a hollow structure of stalk / TiO after na...

Embodiment 2

[0040] Hollow structure biochar / TiO 2 The preparation method of multi-wall tube / CuO photocatalyst comprises the steps:

[0041] a) Wash the stalks of goosebumps with clean water, and after drying, use a pulverizer to pulverize them, keeping the particle size at about 1.5 mm, then soak the stalks of goosebumps in 2mol / L acetic acid solution for 3 hours, and wash them with deionized water until neutral , and dried in an oven at 110°C for 6h to obtain pretreated biomass.

[0042] b) Prepare a titanium isopropoxide solution according to the ratio of titanium isopropoxide: ethanol = 1:3 (volume ratio), dissolve 40 mg of pretreated biomass in 100 mL of titanium isopropoxide solution, sonicate for 30 minutes, and then heat it in an oven at 60 ° C Dry for 6h to obtain titanium isopropoxide / mountain stalk.

[0043] c) Put the above-mentioned titanium isopropoxide / goat stalk in a muffle furnace, heat up to 550°C at a rate of 7°C / min for 4 hours, and obtain a hollow structure goat stal...

Embodiment 3

[0047] Hollow structure biochar / TiO 2 The preparation method of multi-wall tube / CuO photocatalyst comprises the steps:

[0048] a) Wash the stalks of goosebumps with clean water, dry them and crush them with a pulverizer to keep the particle size at about 1.5mm, then soak the stalks of goosebumps in 3mol / L acetic acid solution for 4h, and wash them with deionized water until neutral , dried in an oven at 120°C for 8h to obtain pretreated biomass.

[0049] b) Prepare a titanium isopropoxide solution according to the ratio of titanium isopropoxide: ethanol = 1:4 (volume ratio), dissolve 50 mg of pretreated biomass in 100 mL of titanium isopropoxide solution, sonicate for 40 minutes, and then place in an oven at 80 ° C Dry for 8 hours to obtain titanium isopropoxide / mountain stalk.

[0050] c) Put the above-mentioned titanium isopropoxide / mountain stalk in a muffle furnace, heat up to 700°C at a rate of 10°C / min for 6 hours, and then naturally cool to obtain a hollow structure ...

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Abstract

The invention belongs to the technical field of water pollution photocatalysts and relates to a hollow-structure biomass charcoal / TiO2 multi-wall tube / CuO photocatalyst. The hollow-structure biomass charcoal / TiO2 multi-wall tube / CuO photocatalyst is prepared through compounding hollow-structure biomass charcoal, TiO2 multi-wall tubes and CuO nanoparticles. The invention further discloses a preparation method of the photocatalyst; the preparation method comprises the following steps: pre-treating biomasses through washing, crushing, acid washing and the like; after dissolving the biomasses intoa titanium solution, carrying out ultrasonic treatment for 20 to 40min; drying for 4 to 8h at 40 to 60 DEG C, so as to obtain a titanium source / biomasses; putting the titanium source / biomasses into amuffle furnace and carrying out high-temperature calcination for 2 to 6h; immersing into a copper solution for 3 to 6h; after washing, immersing into a copper solution and washing; after repeating for 10 to 20 times, drying for 10h at 50 to 70 DEG C; finally, carrying out high-temperature calcination for 2 to 4h under the protection of nitrogen gas and naturally cooling to obtain the photocatalyst. The preparation method disclosed by the invention is controllable and has simple reaction conditions; the high specific surface area of the hollow biomass charcoal is combined with the photocatalysis performance of TiO2 and the catalysis performance of CuO, and ammonia nitrogen is efficiently and rapidly removed. Ammonia nitrogen wastewater is removed through experimental simulation and the highest removal rate under the irradiation of ultraviolet rays reaches 99.5 percent.

Description

technical field [0001] The invention belongs to the technical field of water pollution photocatalysts, and relates to a hollow structure biomass carbon / TiO 2 The multi-wall tube / CuO photocatalyst and its preparation method are suitable for preparing materials for photocatalytic degradation of ammonia nitrogen in water bodies. Background technique [0002] With the continuous development of agriculture, due to the unreasonable use of pesticides in recent years, a large amount of nitrogen has been lost and entered into rivers, rivers, lakes and other waters, causing the nitrogen and phosphorus content in the water to exceed the standard, resulting in more and more frequent eutrophication of water bodies , the water environment is getting worse and worse, thus destroying the ecological balance of the water body and even threatening human health. At present, ammonia nitrogen treatment methods are divided into physical methods, biological methods and chemical methods. It is mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C02F1/28C02F1/32C02F101/16
CPCC02F1/281C02F1/32B01J23/72C02F2101/16B01J35/39
Inventor 邱凤仙王敏张涛钟丽杨冬亚徐吉成
Owner JIANGSU UNIV
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