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Preparation method and application of palladium-supported catalytic composite material on corn straw

A composite material and palladium-catalyzed technology, applied in chemical instruments and methods, water treatment of special compounds, physical/chemical process catalysts, etc., can solve problems such as reducing the application value of corn stalks, achieve high-efficiency wastewater decolorization performance, and good water permeability , the effect of not easy to deform

Active Publication Date: 2019-11-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for another important component of corn stalks, straw, due to the limitation of cell type and fiber length, it cannot be used in the field of papermaking like straw husks, which greatly reduces the application value of corn stalks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0020] Example 1: The preparation method of the catalytic composite material of palladium nanoparticles immobilized on corn stalks, the specific operations are as follows:

[0021] (1) Preparation process of corn stalks

[0022] Corn stalks are air-dried, wherein the water content of the air-dried raw materials is 5%, and after manual peeling, the stalks are processed into a cylindrical shape with a diameter of 1 cm and a length of 1 cm to obtain qualified raw materials;

[0023] (2) Qualified corn stalk cylinders are boiled in hot water

[0024]After weighing the raw materials, transfer them to a glass container filled with 190mL deionized water, heat and boil for 2 hours, and keep the water level during the boiling period consistent with the initial water level. After the treatment, soak in hot water at 50°C for 1 hour, and wash twice in this way. Naturally air-dried and set aside; the ratio of water consumption to the absolute dry weight of raw materials is 80mL:1g; if the...

Embodiment 2

[0034] Embodiment 2: the preparation method of the catalytic composite material of palladium nano-particles immobilized on corn stalks, the specific operations are as follows:

[0035] (1) Preparation process of corn stalks

[0036] The corn stalks are air-dried, wherein the water content of the air-dried raw materials is 20%, after manual peeling, the stalks are processed into a cylindrical shape with a diameter of 5 cm and a length of 10 cm to obtain qualified raw materials;

[0037] (2) Qualified corn stalk cylinders are boiled in hot water

[0038] After weighing the raw materials, transfer them to a glass container filled with 400mL of distilled water, heat and boil for 3.5 hours, the water level during the boiling period is consistent with the initial water level, after the treatment, soak in hot water at 75°C for 2 hours, wash twice in this way, and let it dry naturally , for later use; the ratio of water consumption to the absolute dry weight of raw materials is 100mL...

Embodiment 3

[0048] Embodiment 3: the preparation method of the catalytic composite material of palladium nano-particles immobilized on corn stalks, the specific operations are as follows:

[0049] (1) Preparation process of corn stalks

[0050] Corn stalks are air-dried, wherein the water content of the air-dried raw materials is 30%. After manual peeling, the stalks are processed into a cylindrical shape with a diameter of 8 cm and a length of 15 cm to obtain qualified raw materials;

[0051] (2) Qualified corn stalk cylinders are boiled in hot water

[0052] After weighing the raw materials, transfer them to a glass container filled with 1400mL deionized water, heat and boil for 5 hours, and keep the water level consistent with the initial water level during the boiling period. Air-dried and set aside; the ratio of water consumption to the absolute dry weight of raw materials is 200mL:1g; if the weight of raw materials is 10g, the dry weight of raw materials is 10×(100-30)%≈7g, adding ...

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Abstract

The invention discloses a preparation method and application of a corn stalk-carrier palladium-loaded catalytic composite material. The preparation method comprises the following steps: peeling air-dried corn stalk, moulding to obtain a raw material with the qualified three-dimensional size, boiling the corn stalk in hot water, performing a degreasing reaction through benzene-alcohol solution suction extraction, then heating the dried degreased corn stalk, soaking in an aqueous palladium chloride / hydrochloric acid solution for a long time, reducing Pd ions into elemental Pd and loading the elemental Pd into the corn stalk in the form of nanoparticles so as to obtain the corn stalk-carrier palladium-loaded catalytic composite material. The catalytic composite material has high-efficiency capabilities of decolorizing and degrading methylene blue, Congo red and methyl orange, and has biodegradability, and is an environment-friendly organic dye degradation catalyzing material.

Description

technical field [0001] The invention relates to a method for preparing a palladium (Pd) catalytic composite material capable of decolorizing organic dyes by using corn stalks, an agricultural solid waste, and belongs to the technical field of biomass-based excipient materials. Background technique [0002] In recent years, with the continuous development of the printing and dyeing industry, the types of commercial dyes have experienced a blowout growth. At present, there are more than 10,000 synthetic dyes, and the amount of dyes used is also increasing year by year. As a result, the number and types of dyes discharged into water bodies are different. increase, the resulting environmental problems have become more serious. According to statistics, about 600-700 million tons of dye wastewater in my country flow into various water bodies every year. The dye components in this type of wastewater are still dominated by aromatic hydrocarbons and heterocyclic compounds, which hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C02F1/30C02F101/38
CPCB01J31/0201C02F1/30C02F2101/40C02F2305/10
Inventor 高欣韩全清张恒
Owner KUNMING UNIV OF SCI & TECH
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