M. O. Ansari, Mohammad Mansoob Khan, S. Ansari
Sep 1, 2015
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Influential Citations
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Journal of Saudi Chemical Society
Abstract
Polythiophene (PTh) has been the subject of considerable interest because of its good environmental stability, unique redox electrical behavior, stability in doped or neutral states, ease of synthesis, and wide range of applications in many fields. Apart from its applications in the elec- trical or electronic field, PTh has shown promising applications in photocatalytic degradation. The fabrication of a catalyst, metal oxides with PTh, extends the absorption range of the modified com- posite system, thereby enhancing the photocatalytic activity under UV or visible light irradiation. Substituted PTh, such as alkyl substitution, modifies the electronic properties of the polymer, thereby enlarging the potential for industrial applications. PTh or substituted PTh when combined with metal, metal oxide or a combination of both, can exhibit tailorable photocatalytic properties. This review focuses on the chemistry of the band gap engineering of PTh or PTh based systems and the mechanism of photocatalytic degradation. The major developments in the field of UV and vis- ible light-assisted photocatalysis are discussed in terms of the parameters that affect the photocat- alytic efficiency. On the other hand, some challenges still needs to be investigated experimentally, which are mentioned as the scope for future studies. For simplicity, the review has been classified Abbreviations: VB, valence band; CB, conduction band; HOMO, highest occupied molecular orbital; LUMO, lowest unoccupied molecular orbital; UV, ultraviolent; MO, methyl orange; RhB, rhodamine B; RhG, rhodamine 6G; DRS, diffuse reflectance spectroscopy; pHPZC, pH at point of zero charge; Pani, polyaniline; PPy, polypyrrole; PTh, polythiophene; PTh-Ac, poly(3-thiopheneacetic acid); POTh, poly(3-octylthiophene-2,5-diyl); P3Th, poly(3-hexylthiophene); PPTh, poly(3,4-propylenedioxythiophene); PFTh, poly(fluorene-co-thiophene); PHTh, poly(3-hexylthiophene-2,5- diyl); PL, photoluminescence; BET, Brunauer-Emmett-Teller; LDHs, layered double hydroxide shells * Corresponding authors at: School of Chemical Engineering, Yeungnam University, Gyeongsan-si, Gyeongbuk 712-749, South Korea. Tel.: +82