Photocatalytic Reduction of Nitrate in Wastewater Using ZnO Nanopowder Synthesized by Solution Combustion Method - Park, Sung; Kim, Hee-Joon; Kim, Jong Soo; Yoo, Kang; Lee, Jae Chun; Anderson, WA; Lee, Ju-Hyeon (Journal of Nanoscience and Nanotechnology, 2007)