Selective adsorption of anionic and cationic dyes on mesoporous UiO-66 synthesized using a template-free sonochemistry method: kinetic, isotherm and thermodynamic studies

Alvin Romadhoni Putra Hidayat; Liyana Labiba Zulfa; Alvin Rahmad Widyanto; Romario Abdullah; Yuly Kusumawati; Ratna Ediati

doi:10.1039/d2ra06947d

Selective adsorption of anionic and cationic dyes on mesoporous UiO-66 synthesized using a template-free sonochemistry method: kinetic, isotherm and thermodynamic studies

RSC Adv. 2023 Apr 20;13(18):12320-12343. doi: 10.1039/d2ra06947d. eCollection 2023 Apr 17.

Authors

Alvin Romadhoni Putra Hidayat¹, Liyana Labiba Zulfa¹, Alvin Rahmad Widyanto¹, Romario Abdullah¹, Yuly Kusumawati¹, Ratna Ediati¹

Affiliation

¹ Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember (ITS) Sukolilo Surabaya 60111 Indonesia rediati@chem.its.ac.id.

Abstract

In this study, template-free mesoporous UiO-66(U) has been successfully synthesized in shortened time by sonochemical methods and provided energy savings. The synthesized mesoporous UiO-66(U) demonstrated irregular morphology particle around 43.5 nm according to the SEM image. The N₂ adsorption-desorption isotherm indicated an irregular, 8.88 nm pore width mesoporous structure. Ultrasonic irradiation waves greatly altered mesoporous materials. A mechanism for mesoporous UiO-66(U) formation has been proposed based on the present findings. Sonochemical-solvent heat saves 97% more energy than solvothermal. Mesoporous UiO-66(U) outperformed solvothermal-synthesized UiO-66(S) in adsorption. These studies exhibited that mesopores in UiO-66 promote dye molecule mass transfer (MO, CR, and MB). According to kinetics and adsorption isotherms, the pseudo-second-order kinetic and Langmuir isotherm models matched experimental results. Thermodynamic studies demonstrated that dye adsorption is spontaneous and exothermically governed by entropy, not enthalpy. Mesoporous UiO-66(U) also showed good anionic dye selectivity in mixed dye adsorption. Mesoporous UiO-66(U) may be regenerated four times while maintaining strong adsorption capability.