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Method for preparing photocatalytic material from cadmium hyperaccumulator and application

A technology of photocatalytic materials and super-enriched plants, which is applied in the field of environmental protection materials, can solve the problems of preparing photocatalytic materials without cadmium hyper-accumulated plants, and achieve the goals of promoting promotion and application, realizing full resource utilization, and narrow bandgap width Effect

Active Publication Date: 2019-05-24
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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  • Method for preparing photocatalytic material from cadmium hyperaccumulator and application
  • Method for preparing photocatalytic material from cadmium hyperaccumulator and application
  • Method for preparing photocatalytic material from cadmium hyperaccumulator and application

Examples

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 for preparing a photocatalytic material from a cadmium hyperaccumulator and application. A cadmium-enriched hyperaccumulator harvested product is converted into a carbon loaded cadmium sulfate photocatalytic material with the small forbidden band width and efficient photocatalytic activity, full-dose recycling and high-value recycling of the cadmium hyperaccumulator can be achieved, the problems of high cost and secondary environment contamination for cadmium contaminated site plant repairing are solved, and application and popularization of the cadmium hyperaccumulator in soil contamination repairing are promoted.

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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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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