Key Laboratory of Automobile Materials;
Ministry of Education;
and College of Materials Science and Engineering;
Jilin University;
Changchun 130025;
China;
Roll Forging Research Institute;
Jilin University;
Changchun 130025;
China;
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry;
College of Chemistry;
Jilin University;
Changchun 130025;
China;
Nd-doped; titanium; dioxide; Sol-gel; method; Visible; light; photocatalyst; Mechanism; of; up-conversion; Rare; earths;