Terephthalic acid uranyl coordination compound photocatalyst and preparation method thereof

A technology of uranyl terephthalate and uranyl phthalate, which is applied in the field of uranyl terephthalate complex photocatalyst and its preparation, and can solve the problems of insufficient specific surface area and easy recombination of photogenerated electrons and holes

Inactive Publication Date: 2017-11-03
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 It is a wide bandgap semiconductor, which can only function under ultraviolet light, and the photogenerated electrons and holes are easy to recombine, and the specific surface area is not large enough. Therefore, it is necessary to find a new type of photocatalyst from the perspective of practical application.

Method used

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  • Terephthalic acid uranyl coordination compound photocatalyst and preparation method thereof
  • Terephthalic acid uranyl coordination compound photocatalyst and preparation method thereof
  • Terephthalic acid uranyl coordination compound photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Weigh 0.5 mmol of uranyl nitrate (UO 2 (NO 3 ) 2 ·6H 2 O) was dissolved in 3 mL of a mixed solvent of acetonitrile / water with a volume ratio of 1:2 to obtain a yellow solution, and 0.5 mmol of terephthalic acid (p-COOH-C 6 H 4 -COOH) and 0.5mmol 4,4'-bipyridine (4,4'-bpy) were added to the above mixed solution, stirred uniformly, then 0.1mmol tetramethylammonium hydroxide (volume ratio of 25% aqueous solution) was added, Continue to stir for 30min, measure pH=2.38, transfer the mixed solution to a 23mL reaction kettle, seal, and keep at 140°C for 72h. After cooling a yellow product was obtained which was washed, dried and ground to a powder.

Embodiment 2

[0022] It is basically the same as Example 1, except that uranyl nitrate is replaced by uranyl acetate.

Embodiment 3

[0024] It is basically the same as Example 1, except that the amounts of terephthalic acid, 4,4'-bipyridine and uranyl salt added are all 0.1 mmol or 1 mmol.

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Abstract

The invention discloses a terephthalic acid uranyl coordination compound photocatalyst and a preparation method thereof, wherein the molecular formula of the photocatalyst is (H2-4,4'-bpy)[(UO2)2(TPA)3][4,4'-bpy=4,4'-bipyridine, TPA=terephthalic acid], the photocatalyst is yellow powder capable of being screened with a 100-mesh sieve and having a purity of not less than 99%, belongs to a tetragonal system, and has a p4<->21c space group structure, and the crystal cell parameters comprise that a is 23.203(3)angstrom, b is 23.203(3)angstrom, and c is 20.222(4)angstrom. According to the present invention, under the irradiation of an xenon lamp light source capable of simulating sunlight, with the photocatalyst, the RhB solution with the concentration of 20 mg/L can be degraded to 28.6% within 105 min; compared to the traditional TiO2, the photocatalyst of the present invention has the advantage of visible light response, and is the photocatalyst having good photocatalysis performance; and the preparation method has advantages of simple and easy-performing process, low requirements on equipment, and the like.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a uranyl terephthalate complex photocatalyst and a preparation method thereof. Background technique [0002] Water is the source of life and a precious natural resource for human survival and development. However, with industrial progress and social development, people enjoy the convenience of modern life, but also suffer from the harm caused by water pollution. How to remove toxic substances such as dyes in wastewater with low energy consumption, low consumption and high efficiency has become the focus of attention. Photocatalysis technology is a green technology with important application prospects in the fields of energy and environment, and has broad application prospects in the removal of organic pollutants. Therefore, the preparation of photocatalysts has also attracted extensive attention. Semiconductor photocatalyst can oxidize organic pollutants in wastewater to H at room temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/00B01J31/22C02F1/30C02F1/72C02F101/34C02F101/38
CPCY02W10/37C07F5/003B01J31/2213B01J35/004B01J2531/0216B01J2531/0258B01J2531/38C02F1/30C02F2101/34C02F2101/38C02F2305/10
Inventor 司贞秀许伟郑岳青朱红林周林霞
Owner NINGBO UNIV
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