The title compound H2SiW12O40·(CH3)2NH was synthesized in mixed solvent of aqueous and acetonitrile, and its crystal structure had been determined using single crystal X ray diffraction. The crystal belongs to mo...The title compound H2SiW12O40·(CH3)2NH was synthesized in mixed solvent of aqueous and acetonitrile, and its crystal structure had been determined using single crystal X ray diffraction. The crystal belongs to monoclinic, space group C2/m, a=2.0654(4)nm, b=1.3306(3)nm, c=1.3194(3)nm, β=119.59(3)°, V=3.1531(11)nm3, Dc=3.606Mg·m-3, Z=2, R=0.0462, Rw=0.0836. The title compound comprises of a 2+ unit, a polyanion and a free (CH3)2NH molecule. The ESR spectrum of the title compound shows that charge transfer between organic groups and polyanion takes place under irradiation of the sunlight in solid state. The TG study of the title compound shows that it had four stages of the weight loss, and the increase of the decomposition temperature for the polyanion shows that the stability of the polyanion was enhanced due to the influence of Zn2+ ion. CCDC:175866.展开更多
The nickel‐based complex Ni‐CH3CH2NH2‐intercalated niobate layered perovskite Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was synthesized via a facile in situ chemical reaction method.Using ultrathin H1.78Sr0.78Bi0.22Nb2O7...The nickel‐based complex Ni‐CH3CH2NH2‐intercalated niobate layered perovskite Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was synthesized via a facile in situ chemical reaction method.Using ultrathin H1.78Sr0.78Bi0.22Nb2O7nanosheets and nickel acetate as precursors.The composition,structure,photophysical properties,and photocatalytic activity for H2production of Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7were studied systematically.The photocatalyst loaded with0.5wt%Ni exhibited the highest H2evolution rate of372.67μmo/h.This was0.54times higher than the activity of the H1.78Sr0.78Bi0.22Nb2O7nanosheets.The activity of the optimized Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was comparable to that of the Pt‐loaded sample under the same reaction conditions.The photocatalytic activity of the Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was mainly attributed to the excellent separation of photogenerated carriers,after formation of the intercalated complex Ni‐CH3CH2NH2.This study provides a facile strategy to synthesize a non‐precious metal‐loaded photocatalyst for H2production.展开更多
文摘The title compound H2SiW12O40·(CH3)2NH was synthesized in mixed solvent of aqueous and acetonitrile, and its crystal structure had been determined using single crystal X ray diffraction. The crystal belongs to monoclinic, space group C2/m, a=2.0654(4)nm, b=1.3306(3)nm, c=1.3194(3)nm, β=119.59(3)°, V=3.1531(11)nm3, Dc=3.606Mg·m-3, Z=2, R=0.0462, Rw=0.0836. The title compound comprises of a 2+ unit, a polyanion and a free (CH3)2NH molecule. The ESR spectrum of the title compound shows that charge transfer between organic groups and polyanion takes place under irradiation of the sunlight in solid state. The TG study of the title compound shows that it had four stages of the weight loss, and the increase of the decomposition temperature for the polyanion shows that the stability of the polyanion was enhanced due to the influence of Zn2+ ion. CCDC:175866.
基金supported by the National Natural Science Foundation of China(U1403193,21643012)~~
文摘The nickel‐based complex Ni‐CH3CH2NH2‐intercalated niobate layered perovskite Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was synthesized via a facile in situ chemical reaction method.Using ultrathin H1.78Sr0.78Bi0.22Nb2O7nanosheets and nickel acetate as precursors.The composition,structure,photophysical properties,and photocatalytic activity for H2production of Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7were studied systematically.The photocatalyst loaded with0.5wt%Ni exhibited the highest H2evolution rate of372.67μmo/h.This was0.54times higher than the activity of the H1.78Sr0.78Bi0.22Nb2O7nanosheets.The activity of the optimized Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was comparable to that of the Pt‐loaded sample under the same reaction conditions.The photocatalytic activity of the Ni‐CH3CH2NH2/H1.78Sr0.78Bi0.22Nb2O7was mainly attributed to the excellent separation of photogenerated carriers,after formation of the intercalated complex Ni‐CH3CH2NH2.This study provides a facile strategy to synthesize a non‐precious metal‐loaded photocatalyst for H2production.
