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A technology of uranyl trimellitate and photocatalyst, which is applied in the field of photocatalyst preparation, can solve the problems of insufficient specific surface area, easy recombination of photogenerated electrons and holes, etc., achieves good stability, avoids secondary pollution, and has a simple preparation method. Effect
Inactive Publication Date: 2019-06-28
EAST CHINA UNIV OF TECH
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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.
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Embodiment 1
[0027] A preparation method of 5-nitro-1,2,3-benzenetricarboxylic acid uranyl complex photocatalyst, comprising the following steps:
[0028] Accurately weigh 0.07mmol of ligand 5-nitro-1,2,3-benzenetricarboxylic acid, 0.1mmol of uranyl acetate, 10μL and 1.0mL of water on a ten-thousandth balance, and then put the above materials into Put it into a polytetrafluoroethylene reactor with a volume of 23mL, cover and seal it in an oven, react at 150°C for two days, and finally cool to room temperature naturally to obtain yellow transparent crystals with a purity of not less than 99%, namely It is a photocatalyst for 5-nitro-1,2,3-benzenetricarboxylic acid uranyl complex.
Embodiment 2
[0030] A preparation method of 5-nitro-1,2,3-benzenetricarboxylic acid uranyl complex photocatalyst, comprising the following steps:
[0031] Accurately weigh 0.05mmol of ligand 5-nitro-1,2,3-benzenetricarboxylic acid, 0.15mmol of uranyl acetate, 15μL and 1.0mL of water on a ten-thousandth balance, and then put the above raw materials into Put it into a polytetrafluoroethylene reactor with a volume of 23mL, cover and seal it in an oven, react at 120°C for 40h, and finally cool naturally to room temperature to obtain a yellow transparent crystal with a purity of not less than 99%, which is 5-nitro-1,2,3-benzenetricarboxylic acid uranyl complex photocatalyst.
Embodiment 3
[0033] A preparation method of 5-nitro-1,2,3-benzenetricarboxylic acid uranyl complex photocatalyst, comprising the following steps:
[0034] Accurately weigh 0.09mmol of ligand 5-nitro-1,2,3-benzenetricarboxylic acid, 0.2mmol of uranyl acetate, 20μL and 1.0mL of water on a ten-thousandth balance, and then put the above raw materials into Put it into a polytetrafluoroethylene reactor with a volume of 23mL, cover and seal it in an oven, react at 140°C for two days, and finally cool to room temperature naturally to obtain yellow transparent crystals with a purity of not less than 99%, namely It is a photocatalyst for 5-nitro-1,2,3-benzenetricarboxylic acid uranyl complex.
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Abstract
The invention discloses 5-nitro-1, 2, 3-benzenetricarboxylic acid uranyl complex photocatalyst and a preparation method thereof. The molecular formula of the photocatalyst is C18H22N2O37U5, and the chemical structural formula of the photocatalyst is [( UO2 )5 ( L )2( u3-OH )4 ] .7H2O (5-nitro-1, 2, 3-benzenetricarboxylic acid can be abbreviated as H3L); and the method comprises the steps of: adding the 5-nitro-1, 2, 3- benzenetricarboxylic acid, uranyl acetate and alkali liquor into a reaction kettle, adding water, carrying out sealing and reaction for 40 to 60 hours at the temperature of 120-150 DEG C, and finally cooling to room temperature. The preparation method is simple and convenient; and the prepared photocatalyst has good stability and high degradation rate, and can be recycled through centrifugal separation.
Description
technical field [0001] The invention belongs to the technical field of photocatalyst preparation, and in particular relates to a 5-nitro-1,2,3-benzenetricarboxylic acid uranyl 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 are also suffering from the harm caused by water pollution while enjoying the convenience of modern life. How to remove toxic substances such as dyes in wastewater with low energy consumption and high efficiency has become the focus of attention. Photocatalytic 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 widespread attention. [0003] Semiconductor photoca...
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