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Method of solid phase preparation of nanometer zinc oxide photocatalyst by using lignin amine template method

A nano-zinc oxide and photocatalyst technology, which is applied in zinc oxide/zinc hydroxide, light water/sewage treatment, textile industry wastewater treatment, etc., to achieve good effect, excellent photocatalytic performance, and increased specific surface area

Inactive Publication Date: 2013-04-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lignin amine is used as a template in the field of preparation of nano-inorganic materials by solid phase method, which has not been reported yet.

Method used

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  • Method of solid phase preparation of nanometer zinc oxide photocatalyst by using lignin amine template method
  • Method of solid phase preparation of nanometer zinc oxide photocatalyst by using lignin amine template method
  • Method of solid phase preparation of nanometer zinc oxide photocatalyst by using lignin amine template method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The solid-phase preparation of nano-zinc oxide photocatalyst by lignin amine template method, the specific steps are as follows:

[0035] 1. Take 5g of purified and degraded alkali lignin at room temperature and put it in a 250mL round bottom flask, add 30mL of deionized water and 0.5g of NaOH, stir for 10min, add 1.2mL of formaldehyde, stir for 10min, then add 1.50mL of tetraethylene Pentaamine, stirred for 10 minutes, heated and refluxed at 75°C for 3 hours, cooled to room temperature, filtered, added 10% potassium ferricyanide solution to the filtrate to completely precipitate the prepared ligninamine, filtered under reduced pressure, and washed several times Remove excess potassium ferricyanide, put the filter cake in a constant temperature drying oven at 60°C for 10 hours;

[0036] 2. Add 14.87g Zn(NO 3 ) 2 ·6H 2 O and 6.70 g NaC 2 o 4 Grind them in different mortars for 15 minutes, then transfer them to the same mortar, add 1.0 g of the ligninamine synthesize...

Embodiment 2

[0038] The preparation of nano-zinc oxide photocatalyst in solid phase by lignin amine template method is the same as in Example 1, except that the amine used is triethylenetetramine, and finally the sample is roasted at 400°C for 3 hours to obtain milky white nano-zinc oxide photocatalyst. Catalyst with an average particle size of 34nm. The obtained sample was subjected to a photocatalytic degradation test, using methyl orange as a model, and the degradation rate was 81% under 60 minutes of light.

Embodiment 3

[0040] Preparation of nano-zinc oxide photocatalyst in solid phase by lignin amine template method is the same as in Example 1, except that the sample is finally roasted at 500°C for 2h to obtain a white nano-zinc oxide photocatalyst with an average particle size of 18nm. In the photocatalytic degradation test, methyl orange was used as a model, and the degradation rate was 96% under 60 minutes of light.

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Abstract

The invention belongs to the technical field of semiconductor photocatalysis materials, and relates to a method of preparing nanometer zinc oxide photocatalyst by using lignin amine as template molecule, especially to a method of a solid phase preparation of the nanometer zinc oxide photocatalyst by using a lignin amine template method. The method disclosed by the invention firstly synthesizes the lignin into the lignin amine, and then uses the prepared lignin amine as the template for the solid phase preparation of the nanometer zinc oxide photocatalyst. By using the lignin amine derived from the graft-modified lignin, the method is inexpensive, non-toxic, easy to get, etc. Part groups of the lignin amine can be removed after a high-temperature roasting, and pore structures are left, so that the nanometer zinc oxide photocatalyst prepared by using the lignin amine as the template is increased in specific surface area, and shows excellent photocatalysis performance. The method is easy to control, low in cost and simple in technology and flow; the lignin amine is recycled waste, and thus the method is low in cost; and prepared product is milky, has a hexagonal lead-zinc ore structure, and is good in photocatalysis effect and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalytic materials, and relates to a method for preparing a nano-zinc oxide photocatalyst by using lignin amine as a template molecule, in particular to a method for preparing a nano-zinc oxide photocatalyst in solid phase by a lignin amine template method. Background technique [0002] Nano-zinc oxide (ZnO), as a new type of highly efficient semiconductor photocatalytic functional material, exhibits a high quantum yield in the degradation of organic pollutants, and can degrade some toxic organic pollutants that are difficult to biodegrade under normal temperature and pressure. It can effectively degrade or even mineralize substances, and its cost is low, and the product has no secondary pollution, showing excellent application prospects in the field of photocatalysis. [0003] Compared with the gas-phase method and liquid-phase method, the preparation of nano-ZnO by the solid-phase ch...

Claims

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Application Information

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IPC IPC(8): C01G9/02C02F1/30C02F103/30
Inventor 王晓红郝臣张鹏飞白毅周鹏马有兴朱思文谢文静冯峰
Owner JIANGSU UNIV
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