Preparation of well-dispersed Mg-doped LaCoO3 nanocrystals with controllable particle size and high visible-light photocatalytic activity.
Mg-doped LaCoO3 nanocrystals are prepared by a modified sol-gel method. Excess MgO is used to inhibit the crystal growth and agglomeration during the calcination process. A series of Mg-doped LaCoO3 nanocrystals with average crystallite size varying from 13.4 to 31.6 nm can be obtained by changing the molar ratio of Mg:La from 4:1 to 1:10 in the reaction mixture. The largest BET surface area observed is 64.5 m2/g if the molar ratio of Mg:La is 4:1. The product can be well dispersed in water and a very stable colloid formed without any stabilizer. The photocatalytic performance of Mg-doped LaCoO3 nanocrystals is evaluated by the degradation of Reactive Brilliant Red X-3B solution. The well-dispersed Mg-doped LaCoO3 nanocrystals exhibit high visible-light photocatalytic activity.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
Shangmei
S
Sun
Guangsheng
G
Pang
Yuliang
Y
Huang
Chunguang
C
Li
Shouhua
S
Feng
D001391:Azo Compounds / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D009282:Naphthalenesulfonates / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D044367:Phase Transition; D055668:Photochemical Processes; D014025:Titanium / Q000737:chemistry; D014961:X-Ray Diffraction
D001391:Azo Compounds; D017610:Calcium Compounds; D009282:Naphthalenesulfonates; D010087:Oxides; C520101:Reactive brilliant red X-3B; C059910:perovskite; D003035:Cobalt; D007811:Lanthanum; D014025:Titanium; D008274:Magnesium; C060728:cobalt oxide