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Nano titanium dioxide porous microsphere and its production method

A nano-titanium dioxide, manufacturing method technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical process and other directions, can solve problems such as cost increase, bulky, complex photocatalyst separation, etc., to simplify the structure and reduce the cost. Effect

Inactive Publication Date: 2003-09-24
JIANGSU SUJING GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of method will inevitably lead to the complexity and bulk of the photocatalyst separation part in the water purification device, as well as the increase in cost. Only by changing the form of nano-titanium dioxide as a photocatalyst to make it easily separable from water can it fundamentally problem solving

Method used

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  • Nano titanium dioxide porous microsphere and its production method
  • Nano titanium dioxide porous microsphere and its production method

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Embodiment 1

[0024] Embodiment one: see attached figure 1 Shown, a kind of manufacture method of nano-titanium dioxide porous microsphere, 30% nano-titanium dioxide powder (20-25 nanometer), 65% nano-titanium dioxide colloid (15-20 nanometer) and 5% Tween mix, grind, A mixed slurry of nano-titanium dioxide is obtained; spray granulation is adopted; heat treatment is performed at 400° C. for 3 hours to obtain nano-titanium dioxide porous microspheres.

[0025] The technical index of the nano titanium dioxide porous microsphere that present embodiment obtains is:

[0026] Titanium dioxide content: >99.0%

[0027] Crystal form: 100% anatase phase

[0028] Appearance: off-white

[0029] Granular particle size: 60 mesh to 150 mesh (250μm-100μm)

[0030] Loose bulk density: about 0.8 g / cm 3

[0031] Specific surface area: about 80m2 / g-100m2 / g

[0032] Pore ​​volume: 0.38-0.40cc / g

[0033] Pore ​​size: 20nm to 80nm

[0034] Absorb UV wavelength: λ<380nm, 100% absorption

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Abstract

The present invention relates to a nano titanium dioxide porous microsphere, and is characterized by that its main component is nano titanium dioxide of anatase phase, grain size is 60-mesh to 180-mesh, its micropore pore size is 20 nano to 80 nano, its specific surface area is 80 sq.m / g to 140 se.m / g, and its preparation method includes the following steps: mixing nano titanium dioxide powder and nano titanium dioxide colloid, grinding to obtain its mixed pulp material, spray-pelleting, heat-treatment so as to obtain the nano titanium dioxide porous microsphere. Said invented porous microsphere is a high-effective light-catalyst.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a porous microsphere made of nano-titanium dioxide and a manufacturing method thereof, which is especially suitable for drinking water purification or advanced treatment of low-concentration industrial organic wastewater. Background technique [0002] In the process of water supply treatment, chlorine is usually used for purification, and its residues will be converted into harmful organic substances such as chloroform; on the other hand, when dealing with various sewage such as domestic sewage, industrial wastewater, etc. , There are still organic substances including surfactant organic chlorides, such as trichlorethylene, trihalomethane, and even more harmful organic substances such as dioxins and polychlorinated biphenyls. In order to remove such organic substances, a currently known method is to use photocatalyst treatment to decompose trace organic su...

Claims

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Application Information

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IPC IPC(8): B01J2/04B01J21/06B01J35/08B01J35/10B01J37/00
Inventor 程黎放
Owner JIANGSU SUJING GROUP
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