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ZIF-8 derived carbon-based material supporting CdS photocatalyst as well as preparation method and application thereof

A ZIF-8, carbon-based material technology, applied in the field of photocatalytic materials, can solve the problems of difficulty in maintaining the pore structure of the precursor, unsuitable for large-scale industrial production, poor crystal form of the ZIF-8 template, etc., and achieve a rich pore structure. Features, high specific surface area, highly dispersed load effect

Inactive Publication Date: 2018-12-21
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the following problems obviously exist in the preparation process of the above-mentioned composite photocatalyst: (1) the crystal form of the ZIF-8 template prepared by it is relatively poor, so the specific surface area of ​​the obtained carbon material will be greatly lost after high-temperature carbonization, and it is difficult to Maintain the excellent pore structure characteristics of the precursor MOFs; (2) The method of removing impurities by strong acid washing is bound to cause serious harm to the environment, and is not suitable for large-scale industrial production; (3) In the key step of CdS loading, due to the lack of effective loading sites point resulting in a very low load rate in the final

Method used

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  • ZIF-8 derived carbon-based material supporting CdS photocatalyst as well as preparation method and application thereof
  • ZIF-8 derived carbon-based material supporting CdS photocatalyst as well as preparation method and application thereof
  • ZIF-8 derived carbon-based material supporting CdS photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix and dissolve 0.74g zinc nitrate, 0.8g sodium formate and 0.8g 2-methylimidazole in 100mL methanol, stir magnetically for 0.5h, then let stand at room temperature for 12h, then centrifuge, wash, and vacuum dry to obtain ZIF-8; Under protective conditions, the temperature was raised to 1000°C at a rate of 10°C / min by high-temperature carbonization and kept for 3 hours, and then naturally cooled to room temperature to prepare the porous carbon material C-ZIF; then take 0.1g of the prepared porous carbon material C-ZIF -ZIF was dispersed in 0.5mL 3-aminopropyltrimethoxysilane, stirred gently at 50°C for 6h, washed and dried to obtain an amino-modified porous carbon material C-ZIF; the prepared amino-modified The porous carbon material C-ZIF was uniformly dispersed in deionized water by ultrasonic, adding 0.1g cadmium chloride and 0.1g thioacetamide, stirred for 3h, centrifuged, washed, and vacuum-dried to obtain the ZIF-8 derived carbon-based material Photocatalysts loa...

Embodiment 2

[0033] Mix 1.5g of zinc nitrate, 3.1g of sodium formate and 1.5g of 2-methylimidazole in 160mL of methanol, stir magnetically for 1 hour, then let it stand at room temperature for 24 hours, then centrifuge, wash and vacuum dry to obtain ZIF-8; Under the same conditions, the temperature was raised to 1100°C at a rate of 5°C / min by high-temperature carbonization and kept for 2 hours, and then naturally cooled to room temperature to prepare the porous carbon material C-ZIF; then take 0.5g of the prepared porous carbon material C-ZIF ZIF was dispersed in 4mL 3-aminopropyltrimethoxysilane, stirred gently at 60°C for 8h, washed and dried to obtain the amino-modified porous carbon material C-ZIF; the prepared amino-modified porous carbon The material C-ZIF was uniformly dispersed in deionized water by ultrasonic, adding 0.5g cadmium chloride and 0.5g thioacetamide, stirring for 5h, centrifuging, washing, and vacuum drying to prepare ZIF-8 derived carbon-based material loaded with CdS ...

Embodiment 3

[0035] Mix 1.2g of zinc nitrate, 1.8g of sodium formate and 1.8g of 2-methylimidazole in 110mL of methanol, stir magnetically for 2h, then let it stand at room temperature for 20h, then centrifuge, wash, and vacuum dry to obtain ZIF-8; Under the same conditions, the temperature was raised to 950°C at a rate of 8°C / min by high-temperature carbonization and kept for 5h, and then naturally cooled to room temperature to prepare the porous carbon material C-ZIF; then take 0.1g of the prepared porous carbon material C-ZIF ZIF was dispersed in 1mL 3-aminopropyltrimethoxysilane, stirred gently at 70°C for 9h, washed and dried to obtain the amino-modified porous carbon material C-ZIF; the prepared amino-modified porous carbon The material C-ZIF was uniformly dispersed in deionized water by ultrasonic, adding 0.1g cadmium chloride and 0.1g thioacetamide, stirring for 3 hours, centrifuged, washed, and dried in vacuum to prepare ZIF-8 derived carbon-based material loaded with CdS photocat...

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Abstract

The invention belongs to the technical field of preparation of an environment catalyst material, and discloses a photocatalyst of ZIF-8 derived carbon-based material supporting CdS photocatalyst as well as a preparation method and application thereof. ZIF-8 is used as a template to prepare a porous carbon material by virtue high-temperature carbonization under a nitrogen condition, a silane coupling agent is used for performing the amino modification for the porous carbon material, then cadmium chloride and thioacetamide are added, thus obtaining the ZIF-8 derived carbon-based material supporting CdS photocatalyst. The operation process is simple, the requirement for equipment condition is relatively low, and the implementation is easy. The prepared catalyst maximally maintains the characteristics of the ZIF-8 template such as high specific surface area and rich porous structures; ad moreover, by virtue of the amino functionalization, the high-efficiency loading and uniform dispersionof CdS nano particles can be realized, and the prepared composite photocatalytic material has excellent catalytic activity in the process for removing beta-lactam antibiotics pollutants in water.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a photocatalyst loaded with CdS on a ZIF-8 derived carbon-based material, a preparation method and an application thereof. Background technique [0002] Blind random use of antibiotics in medicine, animal husbandry and aquaculture, cross-drug use, long-term overuse and illegal use of unapproved antibiotics have caused increasing antibiotic pollution in the environment, and there are serious antibiotics in some river basins. pollution phenomenon. Due to the misuse of antibiotics in clinical practice, drug-resistant bacteria have increased significantly. The elimination of antibiotics in sewage treatment plants is a very complicated process. Due to the inefficiency of traditional sewage treatment processes for certain types of antibiotics, sewage treatment plants have even become a major factor that promotes the reproduction and spread of drug-resistant bacteria...

Claims

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Application Information

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IPC IPC(8): B01J31/26C02F1/30C02F101/38C02F103/34
CPCC02F1/30B01J31/26C02F2103/343C02F2101/38B01J35/39
Inventor 程建华杨草陈元彩
Owner SOUTH CHINA UNIV OF TECH
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