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Vitreous hollow microspheres with a photocatalytic activity
This technology relates to a method for the preparation of vitreous hollow microspheres with a photocatalytic activity from a vitreous volcanic deposit as the starting material. More particularly, this technology relates to an efficient method for the preparation of vitreous hollow microspheres coated with titanium dioxide having high mechanical strengths and excellent whiteness. Purification of environmental pollutant is possible by using this microsphere.relates preparation vitreous hollow microspheres photocatalytic activity volcanic deposit starting material natural supply sand first subjected pulverization disintegration fine discrete particles classification dry wet elutriation fraction relatively uniform diameter exceeding 50mm coating layer hydrous titanium oxide prior heat treatment effect expansion

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