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Dye mesoporous adsorbent taking rice hulls as templates and silicon sources and preparation method thereof

A technology of adsorbent and template, which is applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, silicon compounds, etc., can solve the problems of material application that have not been explored in depth, and achieve improved adsorption performance and spatial structure, low production cost, The effect of simple preparation process

Inactive Publication Date: 2011-07-20
QUJING NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods only stop at using the raw materials themselves to prepare silica, and the application of the prepared materials has not been explored in depth.

Method used

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  • Dye mesoporous adsorbent taking rice hulls as templates and silicon sources and preparation method thereof
  • Dye mesoporous adsorbent taking rice hulls as templates and silicon sources and preparation method thereof
  • Dye mesoporous adsorbent taking rice hulls as templates and silicon sources and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Soak rice husks in 1mol / L hydrochloric acid solution, reflux at 40°C for 24 hours, wash, and dry naturally. Then soak the rice husk in 1mol / L sodium hydroxide solution, reflux at 40°C for 24 hours, wash and dry. After soaking in the precursor solution for reaction, ultrasonic vibration for 6 minutes, standing for 2 hours, then adding transition metal solution, ultrasonic vibration for 10 minutes, standing for 4 hours. The treated rice husk was soaked in distilled water for 2 hours of hydrolysis reaction, taken out and dried at 60°C, and finally heated from room temperature at a rate of 5°C / min at 450°C, and calcined for 5 hours to obtain the product. The precursor solution is a solution in which the precursor is the solute and the diluent is the solvent, and the concentration of the precursor solution is 0.1% of the volume of the solution. The precursor is titanium tetraisopropoxide. Said diluent is ethanol. Said transition metal solution is an aqueous solution with ...

Embodiment 2

[0037] The rice husks were soaked in 2mol / L hydrochloric acid solution, refluxed at 80°C for 10 hours, washed, and dried at 60°C. Then soak the rice husk in 4mol / L sodium hydroxide solution, heat and reflux for 24 hours, wash and dry naturally. After soaking in the precursor liquid for reaction, ultrasonic vibration for 20 minutes, standing still for 24 hours, then adding the transition metal solution, ultrasonic vibration again for 30 minutes, standing still for 20 hours. The treated rice husk is soaked in an ammonia-ammonium chloride buffer solution for hydrolysis reaction for 10 hours, taken out for natural drying, and finally heated at a rate of 8°C / min from room temperature at 400°C and calcined for 20 hours. The precursor solution is a solution in which the precursor is the solute and the diluent is the solvent. The concentration of the precursor solution is that the precursor accounts for 8% of the volume of the solution. The precursor is titanium tetraisopropoxide. S...

Embodiment 3

[0039] The rice husks were soaked in 4mol / L hydrochloric acid solution, refluxed at 50°C for 24 hours, washed and dried. Then soak the rice husk in 6mol / L sodium hydroxide solution, reflux at 40°C for 36 hours, wash and dry. After soaking in the precursor solution for reaction, ultrasonic vibration for 5 minutes, standing for 2 hours, then adding transition metal solution, ultrasonic vibration for 10 minutes, standing for 4 hours. Soak the treated rice husk in the hydrolyzate sodium bicarbonate-sodium dihydrogen carbonate buffer solution for hydrolysis reaction for 2 hours, take it out and dry it at 60°C, and finally raise the temperature from room temperature at a heating rate of 7°C / min under the condition of 700°C , Calcined for 2h to obtain the product. The precursor solution is a solution in which the precursor is the solute and the diluent is the solvent. The concentration of the precursor solution is that the precursor accounts for 8% of the volume of the solution. Th...

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Abstract

The invention provides a dye mesoporous adsorbent taking rice hulls as templates and silicon sources and a preparation method thereof, belonging to the technical field of fine chemical industry. The dye mesoporous adsorbent product is M-TiO2-SiO2, wherein M is Sc, or / and Vr, or / and Cd, or / and Mn, or / and Fe, or / and Co, or / and Ni, or / and Cu, or / and Zn, or / and Cr, or / and Hg, or / and Ag, or / and Au, or / and Pb. The preparation method comprises the following steps of: template pretreatment, ion exchange, sol-gel reaction and high-temperature calcination to remove the templates to obtain a mesoporous material. The rice hulls which are used as the templates have wide sources and low production cost and are environment-friendly; silicon dioxide existing in the rice hulls automatically deposits, and titanium dioxide and transition metals are doped into the material at the same time, thereby well improving the adsorption property and space structure of the material; and the obtained material has stable performance at high temperature, has simple preparation processes and mild conditions, is pollution-free, has renewable adsorptivity, and can be used for treating waste water of industrial organic dyes.

Description

technical field [0001] The invention relates to a renewable dye adsorbent M-TiO prepared from rice husk as a template and a silicon source 2 -SiO 2 The invention and a preparation method belong to the technical field of fine chemicals. Background technique [0002] The sustainable development of resources, environment, and population has become a major issue at present and in the future. Water is the source of life. With the rapid development of industrial production, a large amount of wastes continue to enter the natural world, which makes the living environment of human beings worse and worse. The problem of water pollution is particularly serious. Water pollution control has become an important topic in the field of environmental protection. Wastewater contains a large number of organic pollutants, many of which are refractory to biodegradation, such as phenols, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons. The "three-to-one" characteristic seriousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F103/30
Inventor 缪应纯翟忠标王家强何琼杨丽芬
Owner QUJING NORMAL UNIV
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