Eco-Friendly Synthesis of TiO2/ZIF-8 Composites: Characterization and Application for the Removal of Imidacloprid from Wastewater

Bogdan, Lucija; Palčić, Ana; Duplančić, Marina; Leskovac, Mirela; Tomašić, Vesna (2023) Eco-Friendly Synthesis of TiO2/ZIF-8 Composites: Characterization and Application for the Removal of Imidacloprid from Wastewater. Processes, 11 (3). ISSN 2227-9717

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Abstract

The aim of this work was to develop hybrid TiO2/ZIF-8 photocatalysts and test their activity for the removal of agricultural pollutants in water. The hybrid photocatalysts were prepared by an innovative method involving hydrothermal synthesis at 150 ◦C using a mechanochemically syn- thesized zeolitic imidazolate framework (ZIF-8) and titanium tetraisopropoxide as a titanium dioxide (TiO2) precursor. Three composite photocatalysts with different mass fractions of titanium dioxide (5, 50, and 95 wt%) were synthesized and characterized, and their adsorption and photocatalytic properties investigated for the removal of imidacloprid. The equilibrium adsorption test showed that ZIF-8 is a good adsorbent and can adsorb 65% of the model component under the working conditions used in this work, while the hybrid photocatalysts can adsorb 1–3% of the model component. It is assumed that the adsorption is hindered by the TiO2 layer on the surface of ZIF-8, which blocks the interactions of ZIF-8 and imidacloprid. A significant decrease in band gap energies (3.1–3.6 eV) was observed for the hybrid TiO2/ZIF-8 photocatalysts compared to the values obtained with ZIF-8 (5 eV), depending on the mass fractions of TiO2. The highest removal efficiency of imidacloprid was achieved with the hybrid photocatalysts containing 5 wt% TiO2.

Item Type:	Article
Uncontrolled Keywords:	imidacloprid; heterogeneous photocatalysis; metal-organic frameworks (MOFs); TiO2; ZIF-8
Subjects:	NATURAL SCIENCES > Chemistry TECHNICAL SCIENCES > Chemical Engineering
Divisions:	Division of Materials Chemistry
Projects:	Project title Project leader Project code Project type Intenzifikacija fotokatalitičkih i katalitičkih procesa za obradu otpadnih voda i otpadnih plinova-IN-PhotoCat Vesna Tomašić; Vjeran Gomzi; Jerome Le Cunff IP-2018-01-8669 HRZZ Zeoliti s malim šupljinama modificirani bakrom pogodni za primjenu u zaštiti okoliša-SMALLPORE Ana Palčić; Magdalena Jablonska UIP-2019-04-4977 HRZZ
Depositing User:	Virna Brumnić
Date Deposited:	27 Mar 2026 12:33
URI:	http://fulir.irb.hr/id/eprint/11526
DOI:	10.3390/pr11030963

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