Reaction temperature is one of the key parameters in the synthesis of metal-organic frameworks(MOFs).Though there is no convergence with regard to the various experimental parameters,reaction temperature has been found to have remarkable influence on the formation and structure of MOFs,especially toward the control of topology and dimensionality of the MOF structures.Theoretically,the reaction temperature affects directly the reaction energy barrier in reaction thermodynamics and the reaction rate in the reaction kinetics.This review aims to show the influence of reaction temperature on crystal growth/assembly,structural modulation and transformation of MOFs,and to provide primary information and insights into the design and assembly of desired MOFs.
In(BTC)(phen)(H_2O)nanocrystals with controllable morphology and size were successfully obtained by solvothermal method.Hierarchical straw-sheaf-like architectures,nanorods and elongated hexagons have been synthesized by varying the volume ratio of DMF:H_2O:C_2H_5OH.Phase-pure In_2O_3nanocrystals were obtained by the calcination of the precursors without significant alteration of the morphology.The products were characterized by PXRD,SEM,TEM,TGA,IR and gas adsorption measurements.The photocatalytic effect was investigated for the In_2O_3 nanocrystals with different morphology on the degradation of rhodamine B(Rh B)and it was found that the nanorods exhibited the best photocatalytic activity,which shows the degradation efficiency of 94%for 8 h.The results showed that the photocatalytic activity increased with the increase of BET surface area and pore volume.
Ji-Min YangZhao-Peng QiYan-Shang KangQing LiuWei-Yin Sun
