Milošević Milica

Radoičić Marija

Radosavljević Aleksandra

Spasojević Jelena

Vukoje Ivana

Ćirić-Marjanović Gordana

Šaponjić Zoran

English

University of Szeged

29th International Symposium on Analytical and Environmental Problems  225  SHAPE-DEPENDENT CARBONIZED PANI-COATED TiO2 NANOCRYSTALS AND ITS USE IN THE DECOMPOSITION OF ORGANIC POLLUTANTS  Milica Milošević1, Marija Radoičić1, Gordana Ćirić-Marjanović2, Jelena Spasojević1, Ivana Vukoje1, Aleksandra Radosavljević1, Zoran Šaponjić3  1Department of Radiation Chemistry and Physics, “Vinča” Institute of Nuclear Sciences - - National Institute of the Republic of Serbia, University of Belgrade,  Mike Petrovića Alasa 12 - 14, Vinča, Belgrade, Serbia 2Faculty of Physical Chemistry, University of Belgrade,  Studentski Trg 12 - 16, Belgrade, Serbia 3Institute of General and Physical Chemistry, Studentski trg 12/V, Belgrade, Serbia e-mail: milicam@vin.bg.ac.rs  Abstract Differently-shaped TiO2 photo-nanocatalysts play a principal role in the remediation of environmental and pollution challenges considering their proven potential for treating organic contaminants in wastewaters [1]. However, increasing the photoactivity of TiO2 i.e. its optical response from UV into visible region is a constant challenge of many ongoing researchers [2]. An proceed towards this demand may be the creation of hybrid functional nanocomposites by coating the TiO2 nanocrystals (NCs) with electronically coupled conductive polymers (e.g., polyaniline (PANI), polypyrrole, etc.) [3]. By the carbonization process of mentioned conductive polymers at high temperatures, obtained final material possess carbon-like structure which impart additional properties [4]. Thus, the evolution  of carbonized PANI (CPANI)-coated TiO2 NCs opens up the possibility for tailoring the photocatalyst with distinctive properties. This study implies development of new nanocomposites based on CPANI and colloidal TiO2 nanoparticles (NPs) (TPC) and CPANI and TiO2 nanotubes (NTs) (TTPC). Sol-gel and hydrothermal synthesis paths were used to obtain TiO2 NCs. The influence of their size and shape on the photocatalytic activity of formed carbonized nanocomposites was estimated. TPC and TTPC nanocomposites were synthesized according to the steps: 1) the non-carbonized PANI/TiO2 class was firstly prepared by the chemical oxidative polymerization of aniline with ammonium peroxydisulfate in the presence of TiO2 NPs or NTs and 2) the subsequent carbonization process was applied (650 °C). Developed hybrid nanocomposites were morphologically and structurally characterized by TEM measurements and Raman spectroscopy, while their functionality was estimated through the photocatalytic degradation processes of Methylene blue and Rhodamine B. All TPC and TTPC nanocomposites showed excellent photocatalytic properties, however, shape-depending of used TiO2 NCs.  Acknowledgements This work was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Grant no. 451-03-47/2023-01/200017).  References [1] M.M. Mahlambi, C.J. Ngila, B.B. Mamba, J. Nanomater., 2015 (2015) Article ID 790173. [2] A. Truppi, F. Petronella, T. Placido, M. Striccoli, A. Agostiano, M.L. Curri, R. Comparelli,       Catal., 7 (2017) Article number 100. [3] K.R. Reddy, M. Hassan, V.G. Gomes, Appl. Catal. A-Gen., 489 (2015) 1. [4] M. Radoičić, Z. Šaponjić, I.A. Janković, G. Ćirić-Marjanović, S.P. Ahrenkiel, M.I. Čomor, Appl. Catal. B: Environ., 136-137 (2013) 133. 

Shape-dependent carbonized pani-coated TiO2 nanocrystals and its use in the decomposition of organic pollutants : [abstract]

http://acta.bibl.u-szeged.hu/82429/1/proceedings_of_isaep_2023_225.pdf

Shape-dependent carbonized pani-coated TiO2 nanocrystals and its use in the decomposition of organic pollutants : [abstract]

Abstract

Similar works

Full text

Available Versions

University of Szeged