A hybrid material of polyaniline protonated with hydrochloric acid and conductive graphene nanosheets (PANi/GNs) has been prepared by an in situ chemical polymerization method. The interactions between PANi and GNs in the hybrid composites are investigated by utilizing XRD, FT-IR, UV–vis and Raman. It is found that the PANi are adsorbed on the surface of the GNs, and the morphology of PANi transforms from twist structure to extended structure after the GNs are introduced. The thermoelectric (TE) properties of PANi/GNs composites have been investigated in the range from 323 K to 453 K. The electrical conductivity and the Seebeck coefficient of PANi/GNs composites are obviously higher than those of the PANi, while the thermal conductivity of the composites still keeps relatively low values even with high GNs content, resulting in the increase in dimensionless figure of merit (ZT). A highest ZT value of 1.95 × 10−3 has been obtained for the composite containing 30 wt % GNs at 453 K, which is about 70 times higher than that obtained from the PANi. PANi adsorbed on the surface of the GNs possesses more extended structure. Electrical conductivity and Seebeck coefficient of PANi/GNs composites are superior to those of PANi. Thermal conductivity of the composites still keeps relatively low values.
Related Content
Electrical and Thermoelectric Properties of Functionalized Multiwalled Carbon Nanotube/Polyaniline Composites Prepared by Different Methods
Nanocomposites consisting of functionalized multiwalled carbon nanotubes and polyaniline (PANI) were prepared by traditional in-situ polymerization and dynamic interfacial polymerization methods. Morphological and structural analysis showed that synthesis by interfacial polymerization resulted in...


Enhanced thermoelectric properties in polyaniline composites with polyaniline-coated carbon nanotubes
Polyaniline (PANI)-coated multi-walled carbon nanotubes (PANI-CNTs) were firstly synthesized by in situ polymerization and then incorporated into the PANI matrix by hot pressing to fabricate bulk PANI-CNT/PANI composites. The composites showed homogeneously dispersed CNTs into the PANI matrix wit...
Enhanced Thermal Stability under DC Electrical Conductivity Retention and Visible Light Activity of Ag/TiO2@Polyaniline Nanocomposite Film
The development of organic–inorganic photoactive materials has resulted in significant advancements in heterogeneous visible light photocatalysis. This paper reports the synthesis of visible light-active Ag/TiO2@Pani nanocomposite film via a simple biogenic–chemical route. Electrically conduc...


Preparation and thermoelectric properties of reduced graphene oxide/PEDOT:PSS composite films
Reduced graphene oxide/poly(3,4-ethylene-dioxythiophene):poly(4-styrenesulfonate) (r-GO/PEDOT:PSS) composite films have been prepared by in situ reducing graphene oxide (GO)/PEDOT:PSS films prepared via a simple wet-chemical route. The as-prepared films have been characterized by X-ray diffractio...
Thermoelectric property of attapulgite/TiO2/polyaniline nanocomposites doped with sulfosalicylic acid
Attapulgite/TiO2/polyaniline nanocomposites were synthesized by in situ polymerization in the presence of sulfosalicylic acid. The microstructure, electrical conductivity, Seebeck coefficient and thermal conductivity of the nanocomposites were also investigated. The results show that the nanocomp...

Transport and thermoelectric properties of polyaniline/reduced graphene oxide nanocomposites
Polyanilines (PANI)/reduced graphene oxide (RGO) nanocomposites are chemically synthesized. Their structure and morphology are characterized by scanning and transmission electron microscopies, x-ray diffraction and Raman spectroscopy. In addition, the nanocomposites’ electrical, thermal and the...
Preparation and thermoelectric properties of multi-walled carbon nanotubes/polypyrrole composites
Multi-walled carbon nanotubes (MWCNT)/polypyrrole (PPy) composite powders with MWCNT content ranging from 0 to 20wt% were prepared by an in-situ polymerization method using p-toluenesulfonic acid (TSA) as a dopant and iron chloride (FeCl3) as an oxidant. The powders were examined by X-ray diffrac...

Spin caloritronics in graphene
Spin caloritronics, the combination of spintronics with thermoelectrics, based on spin and heat transport has attracted a great attention mainly in the development of low-power-consumption technology. In this work we study the thermoelectric properties of a quantum dot attached to two single laye...
Large-Area Single-Layer MoSe2 and Its van der Waals Heterostructures
Layered structures of transition metal dichalcogenides stacked by van der Waals interactions are now attracting the attention of many researchers because they have fascinating electronic, optical, thermoelectric, and catalytic properties emerging at the monolayer limit. However, the commonly used...

Improvement of Thermoelectric Properties Via Combination of Nanostructurization and Elemental Doping
Since the nanostructure was introduced to modify thermoelectric properties in 1993, many efforts have been devoted to fabricate nanostructures and investigate the electrical and thermal transports in nanostructured materials. Compared with low-dimensional materials, nanocomposites not only exhibi...