Abstract: The present invention relates to a method for recovering an organic-inorganic element-doped metal oxide from a hydrolysable metal compound, accompanied with contaminated water treatment. The present invention comprises steps of: a) adding a hydrolysable metal compound as a coagulant to a contaminated water to form a separable floc between the hydrolysable metal compound and contaminants present in contaminated water; b) separating the separable floc and the pre-treated water after flocculation treatment; and c) calcinating the separated floc over 500° C. to produce an organic-inorganic element-doped metal oxide. More preferably, the present invention further comprises subjecting the pre-treated water of the step b) to a microwave treatment to cause a photocatalytic degradation of an organic contaminant that remains in the pre-treated water, with the assistance of the remaining hydrolysable metal compound.
Type:
Grant
Filed:
January 18, 2006
Date of Patent:
December 27, 2011
Assignees:
Photo & Environmental Technology Co., Ltd., University of Technology, Sydney
Inventors:
Hokyong Shon, Vigneswaran Saravanamuthu, Erdei Laszlo, Jong Ho Kim, Jong Beom Kim, Dong Lyun Cho, Byung Chul Choi, Kun Jung Kim, Myung Wan Kim, Sung Jung Song, Hee Ju Park, Jaeweon Cho, In-soo Kim, Seung-hyun Kim
Abstract: The present invention relates to a method for recovering an organic-inorganic element-doped metal oxide from a hydrolysable metal compound, accompanied with contaminated water treatment. The present invention comprises steps of: a) adding a hydrolysable metal compound as a coagulant to a contaminated water to form a separable floc between the hydrolysable metal compound and contaminants present in contaminated water; b) separating the separable floc and the pre-treated water after flocculation treatment; and c) calcinating the separated floc over 500° C. to produce an organic-inorganic element-doped metal oxide. More preferably, the present invention further comprises subjecting the pre-treated water of the step b) to a microwave treatment to cause a photocatalytic degradation of an organic contaminant that remains in the pre-treated water, with the assistance of the remaining hydrolysable metal compound.
Type:
Application
Filed:
January 18, 2006
Publication date:
September 3, 2009
Applicants:
PHOTO & ENVIRONMENTAL TECHNOLOGY CO., LTD., UNIVERSITY OF TECHNOLOGY, SYDNEY
Inventors:
Hokyong Shon, Vigneswaran Saravanamuthu, Erdei Laszlo, Jong Ho Kim, Jong Beom Kim, Dong Lyun Cho, Byung Chul Choi, Kun Jung Kim, Myung Wan Kim, Sung Jung Song, Hee Ju Park, Jaeweon Cho, In-soo Kim, Seung-hyun Kim