Nano titanium dioxide porous microsphere and its production method
A technology of nano-titanium dioxide and manufacturing methods, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as cost increase, bulkiness, and complicated separation of photocatalysts, and achieve cost reduction and structure simplification Effect
Inactive Publication Date: 2005-07-13
JIANGSU SUJING GROUP +1
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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
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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
A nano-titanium dioxide porous microsphere is characterized in that: its main component is nano-titanium dioxide of anatase phase, the particle size is 60 mesh to 180 mesh, the micropore diameter is 20 nanometers to 80 nanometers, and the specific surface area is 80 square meters per square meter. g to 140 m2 / g. The manufacturing method of the nano-titanium dioxide porous microsphere is as follows: mixing and grinding the nano-titanium dioxide powder and the nano-titanium dioxide colloid to obtain a mixed slurry of the nano-titanium dioxide; adopting spray granulation; and obtaining the nano-titanium dioxide porous microsphere through heat treatment. The nano-titanium dioxide porous microsphere obtained by the invention is a highly efficient photocatalyst, and has the advantages of being easy to separate from water and recycle, so it is especially suitable for advanced treatment of drinking water or industrial wastewater containing low-concentration harmful organic substances.
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 subst...
Claims
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IPC IPC(8): B01J2/04B01J21/06B01J35/08B01J35/10B01J37/00
Inventor 程黎放
Owner JIANGSU SUJING GROUP