Role of Conducting Polymers in Enhancing TiO<sub>2</sub>-based Photocatalytic Dye Degradation: A Short Review

Riaz, Ufana; Ashraf, S. M.; Kashyap, Jyoti

doi:10.1080/03602559.2015.1021485

Cited by 54 publications

(15 citation statements)

References 108 publications

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“…On the other hand, similar importance was given to the photoinduced charge mobility/separation, which must be also improved in anticipation of an increase of the overall photoefficiency of TiO2 [2]. One of many reported approaches that can meet both demands, visible light absorption and non-hindered charge separation in TiO2, is the synthesis of nanocomposite systems based on electronically coupled conductive polymers (e.g., PANI, polythiophene, polypyrrole, and their derivatives) and TiO2 [3,4,5]. Namely, moderate to high mobility of charge carriers in extended π-conjugated electron systems, such as conductive polymers which are electronically coupled to TiO2, allows for better separation of photoinduced charges in TiO2 nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites

Radoičić

Ćirić‐Marjanović

Spasojević

et al. 2017

Applied Catalysis B: Environmental

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A simple bottom-up method for the preparation of novel and very efficient photocatalytic nanocomposite system based on carbonized form of polyaniline (PANI) and colloidal TiO2 nanocrystals has been developed. The carbonized PANI/TiO2 nanocomposites were synthesized in a two-step procedure. Firstly, non-carbonized PANI/TiO2 nanocomposites were synthesized by the chemical oxidative polymerization of aniline (ANI) with ammonium peroxydisulfate, in the presence of colloidal TiO2 nanoparticles (TiO2 NPs) (d ∼ 4.5 nm). Initial [TiO2]/[ANI] mole ratios were 20, 50, and 80. In the second step, following the polymerization process, the carbonization of PANI/TiO2 nanocomposites was performed by thermal treatment in an inert atmosphere at 650 o C. The morphological and structural properties of the carbonized nanocomposites were studied using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and Raman spectroscopy. The accomplishment of complete carbonization of PANI in PANI/TiO2 nanocomposites was confirmed by Raman spectroscopy. The appearance of anatase and rutile crystal forms in TiO2 NPs upon carbonization, with mass ratio depending on the initial molar ratio of ANI and TiO2 NPs was revealed by XRD measurements, TEM, SEM and Raman spectroscopy. The photocatalytic activities of carbonized PANI/TiO2 nanocomposites were evaluated following the photocatalytic degradation processes of Rhodamine B and Methylene blue. Carbonized PANI/TiO2 nanocomposites showed higher photocatalytic efficacy compared to bare TiO2 NPs and non-carbonized PANI/TiO2 nanocomposites. The porosity and surface structure of carbonized PANI/TiO2 nanocomposites, as well as crystalline structure of TiO2, affect photocatalytic activity of nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites

Radoičić

Ćirić‐Marjanović

Spasojević

et al. 2017

Applied Catalysis B: Environmental

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“…Conducting polymers (e.g., polyaniline-PANI, polypyrrole-PPy, poly(acetylene)-PAc, polythiophene-PTh) with an extended π-conjugated electron system over a large number of monomer units have high charge carriers mobility expressed through high absorption coefficients that varied from visible light to near infrared [59,60], the reason for that is they can be used as photosensitizers for semiconductor materials, enhancing their photocatalytic activity under both ultraviolet and sunlight irradiation [61,62]. Since Riaz et al published in 2015 a review on the role of conducting polymers in improving the TiO 2 photocatalytic activity [63], in this paper we will discuss only few recent articles published on this topic. PANI is often used as sensitizer for TiO 2 NPs, and as reported by Reddy et al [64], the hybrid material was prepared by in situ oxidative polymerization of aniline in the presence of TiO 2 NPs, finally the inorganic nanoparticles being incorporated in the PANI matrix.…”

Section: Tio 2 -Conducting Polymers Hybrid Photocatalystsmentioning

confidence: 99%

Polymer Nanocomposites for Photocatalytic Applications

Melinte¹,

Stroea²,

Chibac-Scutaru³

2019

Catalysts

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In the present comprehensive review we have specifically focused on polymer nanocomposites used as photocatalytic materials in fine organic reactions or in organic pollutants degradation. The selection of the polymer substrates for the immobilization of the active catalyst particles is motivated by several advantages displayed by them, such as: Environmental stability, chemical inertness and resistance to ultraviolet radiations, mechanical stability, low prices and ease availability. Additionally, the use of polymer nanocomposites as photocatalysts offers the possibility of a facile separation and reuse of the materials, eliminating thus the post-treatment separation processes and implicitly reducing the costs of the procedure. This review covers the polymer-based photocatalytic materials containing the most popular inorganic nanoparticles with good catalytic performance under UV or visible light, namely TiO2, ZnO, CeO2, or plasmonic (Ag, Au, Pt, Pd) NPs. The study is mainly targeted on the preparation, photocatalytic activity, strategies directed toward the increase of photocatalytic efficiency under visible light and reuse of the hybrid polymer catalysts.

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“…Some recent research trends in the open literature have shown a growing interest in combining inorganic metallic precursors with recycled plastics to form nanocomposites. Such nanocomposites can have various improved properties when matched appropriately with the primary material [ 4 , 5 ]. Thus, fundamental research to create novel nanocomposites with better physical-chemical properties, and at the same time mitigate some of the challenges associated with waste management, can provide new strategies to reduce the harmful impact to public health and help improve and protect the natural environment [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Prediction of electronic properties of novel ZnS–ZnO-recycled expanded polystyrene nanocomposites by DFT

Akbarzadeh

Ayeler

Ibrahim

et al. 2022

Heliyon

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DFT calculations using Material Studio (2019) were used to ascertain the changes in electronic properties of recycled expanded polystyrene (rEPS) after modification with nanoparticles of ZnS and ZnO. The nanocomposites were obtained using rEPS and suitable metal salt precursors via a solvothermal method. The XRD analysis was conducted to obtain the crystallography data of the new rEPS-based nanocomposites. Using Material Studio simulation software, the potential photocatalytic properties of the new prepared material was predicted and information on the electronic band structure was extracted. The calculated band gap values for rEPS and ZnS-ZnO-rEPS nanocomposite were 4.217 eV and 2.698 eV, respectively. Furthermore, our results showed that the nanocomposite is a p-type semiconductor. From the electronic structure and the band gap narrowing, these nanocomposites obtained from a waste material may have some potential in photocatalytic applications.

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Role of Conducting Polymers in Enhancing TiO₂-based Photocatalytic Dye Degradation: A Short Review

Cited by 54 publications

References 108 publications

Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites

Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites

Polymer Nanocomposites for Photocatalytic Applications

Prediction of electronic properties of novel ZnS–ZnO-recycled expanded polystyrene nanocomposites by DFT

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Role of Conducting Polymers in Enhancing TiO2-based Photocatalytic Dye Degradation: A Short Review

Cited by 54 publications

References 108 publications

Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites

Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites

Polymer Nanocomposites for Photocatalytic Applications

Prediction of electronic properties of novel ZnS–ZnO-recycled expanded polystyrene nanocomposites by DFT

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Role of Conducting Polymers in Enhancing TiO₂-based Photocatalytic Dye Degradation: A Short Review