Electrical transport and optical properties of vanadyl phosphate - polyaniline nanocomposites

被引：40

作者：

De, Sukanta ^{[1
]}

Dey, Arup ^{[1
]}

De, S. K. ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, W Bengal, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2007年 / 68卷 / 01期

关键词：

nanostructures; polymers; thermogravimetric analysis (TGA); transport properties; optical properties;

D O I：

10.1016/j.jpcs.2006.09.001

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The nanocomposites of conducting polyaniline and layered vanadyl phosphate, VOPO4 center dot 2H(2)O are synthesized by redox intercalation method. Water content decreases with insertion of polyaniline molecules. In scanning electron micrographs plate like structures are observed for both VOPO4 center dot 2H(2)O and intercalated nanocomposites. Protonation of polyaniline and interaction with vanadyl phosphate are observed in infrared and UV absorption spectroscopy. Intercalation improves conductivity of pristine vanadyl phosphate. Thermally activated electrical dc conductivity at low temperature shows two distinct slopes around 210 K for both the nanocomposites. The optical band gap of vanadyl phosphate decreases from 4.0 to 3.7 eV due to insertion of polyaniline. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：66 / 72

页数：7

共 35 条

[1] INTERLAYER COORDINATION ENVIRONMENTS OF IRON, COBALT, AND NICKEL IN VANADYL PHOSPHATE DIHYDRATE, VOPO4.2H2O, INTERCALATION COMPOUNDS [J].

ANTONIO, MR ;

BARBOUR, RL ;

BLUM, PR .

INORGANIC CHEMISTRY, 1987, 26 (08) :1235-1243

[2] A convenient hydrothermal route for the synthesis of MxVOPO4•yH2O (M = Na and K) [J].

Ayyappan, P ;

Ramanan, A ;

Joy, PA ;

Pring, A .

SOLID STATE IONICS, 1998, 107 (1-2) :53-57

[3] New metal-intercalated layered vanadyl phosphates, MxVOPO4•yH2O (M = Ag, Cu, Zn) [J].

Ayyappan, P ;

Ramanan, A ;

Torardi, CC .

INORGANIC CHEMISTRY, 1998, 37 (14) :3628-3634

[4]

Cardin DJ, 2002, ADV MATER, V14, P553, DOI 10.1002/1521-4095(20020418)14:8<553::AID-ADMA553>3.0.CO

[5]

2-F

[6] Synthesis and characterization of an VOPO4-polyaniline lamellar hybrid compound [J].

de Farias, RF ;

Airoldi, C .

SOLID STATE SCIENCES, 2003, 5 (04) :611-613

[7] The first VOPO4•2H2O intercalation compound synthesized through a solid-state reaction at room temperature [J].

de Farias, RF ;

Airoldi, C .

JOURNAL OF SOLID STATE CHEMISTRY, 2002, 166 (02) :277-278

[8] Charge transport mechanism of vanadium pentoxide xerogel-polyaniline nanocomposite [J].

De, S ;

Dey, A ;

De, SK .

EUROPEAN PHYSICAL JOURNAL B, 2005, 46 (03) :355-361

[9] Transport and dielectric properties of α-zirconium phosphate-polyaniline composite [J].

De, S ;

De, A ;

Das, A ;

De, SK .

MATERIALS CHEMISTRY AND PHYSICS, 2005, 91 (2-3) :477-483

[10] ASSEMBLY AND POLYMERIZATION OF SOME AROMATIC-AMINES IN ALPHA-VOPO4-CENTER-DOT-2H(2)O [J].

DESTEFANIS, A ;

FOGLIA, S ;

TOMLINSON, AAG .

JOURNAL OF MATERIALS CHEMISTRY, 1995, 5 (03) :475-483

← 1 2 3 4 →