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A method and application of photocatalytic materials prepared by using cadmium hyperaccumulator plants

A technology of photocatalytic materials and hyper-accumulating plants, which is applied in the field of environmental protection materials, can solve the problems of preparing photo-catalytic materials without cadmium hyper-accumulating plants, and achieves promotion of popularization and application, high-value recycling, and realization of full resource utilization. Effect

Active Publication Date: 2021-11-30
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is no research on the preparation of photocatalytic materials and their applications using cadmium hyperaccumulator plants.

Method used

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  • A method and application of photocatalytic materials prepared by using cadmium hyperaccumulator plants
  • A method and application of photocatalytic materials prepared by using cadmium hyperaccumulator plants
  • A method and application of photocatalytic materials prepared by using cadmium hyperaccumulator plants

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation of the cadmium sulfide photocatalytic material of embodiment 1 carbon support

[0037] 1) Take the aboveground part of cadmium hyperaccumulator Sedum sedum, wash it with water, drain it, dry it in a drying oven at 105°C to constant weight, and pulverize it with a pulverizer to obtain a sample.

[0038] Take an appropriate amount of the pulverized sample in step 1), digest it, and use ICP-MS to detect that the content of cadmium in the sample is 9050 mg / kg (dry weight).

[0039] 2) Anaerobic carbonization stage: put the pulverized sample in step 1) into a corundum boat, place it in the center of the tube furnace, pass in nitrogen gas, and burn it at 300°C for 3 hours under the protection of nitrogen gas to obtain Cadmium Biochar.

[0040] 3) Micro-oxygen cadmium concentration stage: adjust the temperature in the tube furnace to 600°C, introduce nitrogen / oxygen mixed gas, the nitrogen / oxygen volume ratio is 6:1, continue firing for 0.5 hours, and then coo...

Embodiment 2

[0044] The preparation of the cadmium sulfide photocatalytic material of embodiment 2 carbon supports

[0045] 1) Take the aboveground part of cadmium hyperaccumulator Sedum sedum, wash it with water, drain it, dry it in a drying oven at 105°C to constant weight, and pulverize it with a pulverizer to obtain a sample.

[0046] Take an appropriate amount of the pulverized sample in step 1), digest it, and then use ICP-MS to detect that the content of cadmium in the sample is 9350 mg / kg (dry weight).

[0047] 2) Anaerobic carbonization stage: put the pulverized sample in step 1) into a corundum boat, place it in the center of the tube furnace, pass in nitrogen gas, and burn it at 700°C for 4 hours under the protection of nitrogen gas to obtain Cadmium Biochar.

[0048] 3) Micro-oxygen cadmium concentration stage: adjust the temperature in the tube furnace to 650°C, feed a nitrogen / oxygen mixed gas with a volume ratio of 6:1, burn for 1 hour, and then cool naturally to room tempe...

Embodiment 3

[0052] The preparation of the cadmium sulfide photocatalytic material of embodiment 3 carbon supports

[0053] 1) Take the aboveground part of cadmium hyperaccumulated Sedum chinensis, wash it with water, drain it, dry it in a drying oven at 105°C until it reaches constant weight, and grind it with a pulverizer to obtain a sample.

[0054] Take an appropriate amount of the pulverized sample in step 1), digest it, and then use ICP-MS to detect that the content of cadmium in the sample is 8950 mg / kg (dry weight).

[0055] 2) Anaerobic carbonization stage: put the pulverized sample in step 1) into a corundum boat, place it in the center of the tube furnace, pass in nitrogen gas, and burn it at 1000°C for 3 hours under the protection of nitrogen gas to obtain Cadmium Biochar.

[0056] 3) Micro-oxygen cadmium concentration stage: adjust the temperature in the tube furnace to 800°C, introduce nitrogen / oxygen mixed gas, and continue firing for 0.25 hours at a nitrogen / oxygen volume ...

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Abstract

The invention discloses a method and application for preparing photocatalytic materials by using cadmium hyperaccumulator plants. The invention converts cadmium-rich hyperaccumulator plant harvests into carbon with narrow band gap and high-efficiency photocatalytic activity. The loaded cadmium sulfide photocatalytic material realizes the full resource and high-value recycling of cadmium hyperaccumulator plants, resolves the high cost of phytoremediation of cadmium-contaminated sites and the secondary pollution of the environment, and is conducive to promoting the development of cadmium hyperaccumulator plants. Popularization and application in soil pollution remediation.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly materials, and in particular relates to a method and application for preparing photocatalytic materials by using cadmium hyperaccumulator plants. Background technique [0002] A hyperaccumulator is a plant that absorbs heavy metals in excess and transfers them to the shoots. The method of removing heavy metals from soil by using hyperaccumulator plants has become an emerging technology in the field of environmental remediation, and is considered to be one of the cost-effective and feasible in-situ remediation strategies for heavy metal-contaminated soil. Sedum plants such as Sedum plumbizincicola and Sedum alfredii are one of the plants with the strongest hyperaccumulation capacity for cadmium (Cd) reported so far. Greater than 7000mg / kg (dry weight), it has been successfully applied to the remediation of cadmium-contaminated soil. However, in recent years, people have paid more and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/34C02F101/36C02F101/38
Inventor 陈志邢睿智陈志轩严勰周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV
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