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Wood fiber biomass loaded nano hydrated titanium dioxide composite material, and preparation method and application thereof

A technology of hydrated titanium dioxide and biomass materials, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, special compound water treatment, etc., can solve the difficulties of titanium dioxide photocatalysts and the unsatisfactory efficiency of organic pollutants , complex catalyst preparation process and other issues, to achieve good adsorption and deep removal capabilities, simple and environmentally friendly preparation process, and good photocatalytic degradation ability

Active Publication Date: 2020-02-21
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a lignocellulosic biomass-loaded nano-hydrated titanium dioxide composite material, which solves the problem of existing metal-doped TiO 2 Photocatalyst thermal instability, easy to form carrier recombination center, TiO 2 Reduced activity, harsh reaction conditions, etc.
Another technical problem to be solved by the present invention is to provide a preparation method of lignocellulosic biomass-loaded nano-hydrated titanium dioxide composite material, which solves the problem of existing TiO 2 The catalyst preparation process is complicated, the carrier cost is high, and the catalyst performance is not stable enough, etc.
The technical problem to be solved by the present invention is to provide an application of lignocellulosic biomass-loaded nano-hydrated titanium dioxide composite material, to solve the limitations of existing adsorption materials and processes for the advanced treatment of heavy metals in wastewater, and to solve the current limitations of titanium dioxide photocatalysts. There are difficulties in practical application, especially the unsatisfactory efficiency of degrading organic pollutants under sunlight and visible light

Method used

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  • Wood fiber biomass loaded nano hydrated titanium dioxide composite material, and preparation method and application thereof
  • Wood fiber biomass loaded nano hydrated titanium dioxide composite material, and preparation method and application thereof
  • Wood fiber biomass loaded nano hydrated titanium dioxide composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The preparation method of rice straw loaded nanometer hydrated titanium dioxide composite material comprises the following steps:

[0038] Using rice straw as a carrier, cut it into 4mm thin sections, dry it at 60°C for later use, weigh the rice straw into a three-neck flask, then add tetrabutyl titanate (analytical pure, content ≥ 98%) and absolute ethanol The mixed solution, the volume ratio of tetrabutyl titanate to absolute ethanol is 1:3, the solid-liquid ratio of rice straw to the mixed solution is 1g:50mL, stirring and impregnating at 30°C for 15h; drain the rice straw, press Add NaOH solution with a concentration of 0.1mol / L at a solid-to-liquid ratio of 1g:50mL, shake at 30°C for 1.5h; then wash the rice straw with water to adjust the pH to 8-9; drain the water and dry it at 60°C. That is, rice straw-supported nano-hydrated titanium dioxide composite material (RS-nHTO) was obtained.

[0039] Characterize the RS-nHTO prepared by the above method:

[0040] (1) ...

Embodiment 2

[0049] The rice straw-loaded nano-hydrated titanium dioxide composite material prepared in Example 1 was used to photocatalytically degrade organic pollutants in water (represented by methylene blue), and it was investigated whether the pollutants could be degraded under the conditions of simulating sunlight and visible light.

[0050] (1) Investigation of the degradation efficiency of methylene blue by RS-nHTO with different power

[0051] Figure 5 With 0.1g RS-nHTO at 150W and 300W power, the composite material was subjected to photodegradation reaction to 10mg / L methylene blue, and was sampled and measured by spectrophotometry. From the obtained results, it can be clearly seen that with the increase of light source power , the photodegradation effect of the composite material on methylene blue showed a slight increase, and the methylene blue was almost completely removed in 150min.

[0052] (2) Determination of the efficiency of methylene blue degradation by RS-nHTO with ...

Embodiment 3

[0062] (1) Adopt the composite adsorbent material among the embodiment 1 to be used for Cu in water 2+ (concentration is 10mg / L) adsorption test:

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Abstract

The invention discloses a wood fiber biomass loaded nano hydrated titanium dioxide composite material, and a preparation method and an application thereof, and belongs to the technical field of titanium dioxide composite materials. The preparation method comprises the steps: soaking wood fiber biomass into a mixed solution of butyl titanate and absolute ethyl alcohol, treating with an alkaline solution, washing the wood fiber biomass material with water, and drying to obtain the wood fiber biomass loaded nano hydrated titanium dioxide composite material. The wood fiber biomass is selected as acarrier, the good photocatalyst titanium dioxide and the wood fiber biomass are combined, the composite material is low in preparation cost and environmentally friendly, recycling of resources is achieved, and the preparation process is simple, convenient and environmentally friendly. The composite material not only can adsorb and remove heavy metal ions in water, but also can catalytically degrade organic pollutant methylene blue under the excitation of sunlight and visible light.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide composite materials, and in particular relates to a lignocellulosic biomass-loaded nanometer hydrated titanium dioxide (hydrous titanium oxide, HTO) composite material and a preparation method and application thereof. Background technique [0002] With the continuous growth of the world's population and the development of industrialization, the problem of water pollution is becoming more and more serious. Since most organic substances and heavy metals are toxic, the treatment of organic substances and heavy metals in sewage has become a difficult problem among many environmental problems faced by human beings today. In recent years, my country and other countries in the world have attached great importance to the advanced treatment of harmful organic substances and heavy metals in industrial and domestic sewage. [0003] Traditional methods for the treatment of heavy metal-containing was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/28C02F1/30C02F101/30C02F101/20
CPCB01J31/38C02F1/286C02F1/30C02F2101/308C02F2101/20C02F2305/10B01J35/23B01J35/39Y02W10/37
Inventor 陈一良史浩陆静宇徐立杰吴光前李萍萍
Owner NANJING FORESTRY UNIV
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