Progress in coordinated structural chemistry to citrate process

Citrate method is one of the popular processes for the synthesis of mixed oxide.This is due to the advantages of its homogeneous,low decomposed temperature,and resulted small particle sizes.Citrate complexes are considered as the molecular precursors for the mixed oxides by thermal decomposition,which may show different compositions and structures.The mixed oxides can be used as catalysts and the other materials by citrate process.In the present paper,recent progress of Ti,V,Mo and W citrate complexes as precursors for the preparation of mixed oxides is reviewed.