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Titanium dioxide/lignocellulose-based active carbon composite material and preparation method thereof

A technology of lignocellulose and titanium dioxide, which is applied in chemical instruments and methods, chemical/physical processes, and other chemical processes, can solve the problems of low concentration, high toxicity and refractory organic pollutants, and achieve good photocatalytic degradation performance, The effect of simple process and strong adsorption performance

Inactive Publication Date: 2015-04-29
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fundamentally solve the long-standing problem that traditional treatment methods cannot selectively remove low-concentration, highly toxic, refractory organic pollutants under the condition of a large number of general organic / inorganic substances coexisting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A titanium dioxide / lignocellulose activated carbon composite material and a preparation method thereof, comprising the steps of:

[0022] 1) Titanium dioxide sol preparation: Dissolve 15 parts of tetrabutyl titanate and 5 parts of glacial acetic acid in 50 parts of absolute ethanol, stir magnetically for 0.5 h to make them evenly mixed, and slowly drop into a mixture of 80 parts of absolute ethanol and 5 parts of distilled water In the mixed solution, control the dripping speed of the burette, seal and stir to obtain light yellow Ti0 2 Transparent sol, standing and aging for 2 hours;

[0023] 2) Preparation of lignocellulose solution: Dissolve lignocellulose in dimethyl sulfoxide at room temperature, prepare a solution with a volume mass fraction (g / L) of 2%, stir magnetically until the solution is transparent; the lignocellulose Vegetable materials are powdery finished products processed from plant raw materials, including stalks, branches, leaves, skins and fruit she...

Embodiment 2

[0027] A titanium dioxide / lignocellulose activated carbon composite material and a preparation method thereof, comprising the steps of:

[0028] 1) Titanium dioxide sol preparation: Dissolve 20 parts of tetrabutyl titanate and 10 parts of glacial acetic acid in 60 parts of absolute ethanol, stir for 1 hour to make it evenly mixed, and slowly drop in a mixture of 85 parts of absolute ethanol and 10 parts of distilled water In the solution, control the dripping speed of the burette, seal and stir to obtain light yellow Ti0 2 Transparent sol, standing and aging for 3 hours;

[0029] 2) Preparation of lignocellulose solution: Dissolve lignocellulose in dimethylformamide at room temperature, prepare a solution with a volume mass fraction (g / L) of 8%, stir magnetically until the solution is transparent; the lignocellulose Vegetable materials are powdery finished products processed from plant raw materials, including stalks, branches, leaves, skins and fruit shells of various perenn...

Embodiment 3

[0033] A titanium dioxide / lignocellulose activated carbon composite material and a preparation method thereof, comprising the steps of:

[0034] 1) Titanium dioxide sol preparation: Dissolve 25 parts of tetrabutyl titanate and 15 parts of glacial acetic acid in 70 parts of absolute ethanol, stir for 1.5 hours with magnetic force to make it evenly mixed, slowly drop into a mixture of 90 parts of absolute ethanol and 15 parts of distilled water In the mixed solution, control the dripping speed of the burette, seal and stir to obtain light yellow TiO 2 Transparent sol, standing and aging for 3 hours;

[0035] 2) Preparation of lignocellulose solution: Dissolve lignocellulose in N-methylmorpholine-N-oxide at room temperature, prepare a solution with a volume mass fraction (g / L) of 15%, and magnetically stir until the solution Transparent; the lignocellulosic material is a powdery finished product processed from plant-based raw materials, including stalks, branches, leaves, skins an...

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Abstract

The invention relates to a titanium dioxide / lignocellulose-based active carbon composite material and a preparation method thereof. The method comprises the following steps of firstly, preparing faint yellow transparent TiO2 sol by using tetrabutyl titanate, then, dissolving tetrabutyl titanate into a prepared lignocellulose solution, sufficiently reacting tetrabutyl titanate, filtering a liquid on the upper layer after ending the reaction and settling, then, standing in the air for 12-36 hours, next, respectively and alternately washing and filtering by using distilled water and absolute ethyl alcohol until the filtrate is neutral, and drying a product in a vacuum drying oven to prepare a titanium dioxide / lignocellulose composite material; and then, pre-oxidizing, carbonizing and activating the composite material to prepare the titanium dioxide / lignocellulose-based active carbon composite material with efficient adsorption and catalysis performance. The preparation method disclosed by the invention is simple in process; and the obtained titanium dioxide / lignocellulose-based active carbon composite material has relatively-strong adsorption performance and relatively-good photocatalytic degradation performance and has the advantage of catalyzing organic pollutants in wastewater or air.

Description

technical field [0001] The invention relates to a titanium dioxide / lignocellulose-based activated carbon composite material and a preparation method thereof, belonging to the preparation technology of activated carbon composite materials. Background technique [0002] Traditional printing and dyeing wastewater treatment methods are not ideal, mainly because the molecular structure of dyes in wastewater is stable, the composition is complex, the decolorization rate and COD removal rate are not high, and secondary pollution is easy to occur. Using the photocatalytic properties of semiconductor materials, many organic substances that cannot be removed by chemical and biological methods can be completely decomposed into carbon dioxide and water at room temperature without causing secondary pollution. It can be used as sunlight and ultraviolet light contained in fluorescent lamps. excitation source. At present, among the catalysts used to degrade environmental pollutants, titani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J21/18
CPCB01J20/20B01J20/3085B01J21/063B01J21/18B01J2220/42B01J2220/4806
Inventor 万军民魏猛胡智文杨子昂刘建军
Owner ZHEJIANG SCI-TECH UNIV
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