Cellulose-based template based spindle-shaped nano-titanium dioxide and preparation method thereof

A nano-titanium dioxide, cellulose-based technology, applied in the direction of titanium dioxide, nanotechnology for materials and surface science, titanium oxide/hydroxide, etc., can solve the problems of insufficient purity and mixed anatase, and achieve good adsorption effect , The preparation method is simple and easy to operate, and the raw materials are green.

Active Publication Date: 2015-09-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO obtained by commonly used preparation methods 2 Usually amorphous and anatase, high temperature calcination (higher than 600°C) is required to obtain rutile ore, and often mixed with anatase, the purity is not enough
Despite the development of hydrothermal and hydrolysis methods in recent years, the preparation of pure rutile ore at low temperature still faces challenges

Method used

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  • Cellulose-based template based spindle-shaped nano-titanium dioxide and preparation method thereof
  • Cellulose-based template based spindle-shaped nano-titanium dioxide and preparation method thereof
  • Cellulose-based template based spindle-shaped nano-titanium dioxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Disperse commercially available cellulose fibers (1g) in 150ml of water, then slowly add concentrated sulfuric acid (2ml) dropwise while stirring;

[0039] 2) Add titanyl sulfate (TiOSO) dropwise in the above fiber dispersion 4 ·H 2 SO 4 ·H 2 O) solution (1.1 g), while continuing to stir;

[0040] 3) Heating in an oil bath at 60°C for 7 hours while stirring;

[0041] 4) The reaction is completed, cooled, then vacuum filtered, and the fibrous filter cake after filtration is rinsed with deionized water several times, dried to obtain cellulose-based nano TiO 2 .

[0042] figure 1 Cellulose-based nano-TiO prepared for this example 2 SEM photo, as can be seen from the photo: TiO 2 The nanoparticles are uniformly dispersed on the surface of the cellulose base and are in the shape of spindles. These spindle-shaped crystals are about 180nm long and 50nm wide.

[0043] figure 2 Cellulose-based nano-TiO prepared for this example 2 The TEM pictures further confirmed...

Embodiment 2

[0048] 1) Disperse commercially available cellulose fibers (1g) in 200ml of water, then slowly add concentrated sulfuric acid (3ml) dropwise while stirring;

[0049] 2) Add titanyl sulfate solution (0.8 g) dropwise to the fiber dispersion, while continuing to stir;

[0050] 3) Heating in an oil bath at 70°C for 5 hours while stirring;

[0051] 4) The reaction is completed, cooled, then vacuum filtered, and the fibrous filter cake after filtration is rinsed with deionized water several times, dried to obtain cellulose-based nano TiO 2 .

Embodiment 3

[0053] 1) Soak commercially available filter paper (1g) in 100ml of water, then slowly add sulfuric acid (1ml) dropwise while stirring slowly;

[0054] 2) Add titanyl sulfate solution (0.5 g) drop by drop to the above solution while continuing to stir;

[0055] 3) Heating in an oil bath at 80°C for 6 hours while stirring;

[0056] 4) The reaction is completed, cooled, then vacuum filtered, and the reacted filter paper is rinsed with deionized water several times, dried to obtain cellulose-based nano-TiO 2 .

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Abstract

The invention relates to a cellulose-based template based spindle-shaped nano-titanium dioxide (TiO2) and a preparation method thereof. The method includes: firstly dispersing a cellulose-based high polymer material in water, then adding a TiO2 precursor, and carrying out low temperature hydrolysis for in-situ generation of spindle-shaped nano-TiO2 on the cellulose base surface. The prepared TiO2 spindle body is rutile ore and uniformly dispersed, and has length of 100-200nm and width of 30-60nm. The preparation method provided by the invention has the characteristics of simple and easy operation, low cost, green, cheap and easily available raw materials, and the prepared material has potential application in adsorption, catalysis, electronics and new energy fields.

Description

technical field [0001] The invention relates to nano-titanium dioxide and a preparation method thereof, in particular to a spindle-shaped titanium dioxide nano-crystal synthesized in situ using a cellulose base as a template and a preparation method thereof. Background technique [0002] Titanium dioxide (TiO 2 ) has the advantages of non-toxicity, stability, high surface activity, and low cost. Nano-TiO 2 With a very high specific surface area, it has a wide range of applications in environmental and energy fields such as adsorption, photocatalysis, sensors, and solar cells. And these applications with TiO 2 The morphology, crystal form, size and structure level are directly related, so the synthesis of TiO with various morphologies 2 Nanocrystals have attracted much attention. [0003] TiO 2 There are three crystal forms: anatase, rutile, brookite and amorphous. Among them, brookite is unstable, and anatase TiO 2 The lattice contains more defects and vacancies, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
Inventor 李艳香杨传芳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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