Solar photocatalytic degradation of isoproturon over TiO2/H-MOR composite systems

Journal of Hazardous Materials
Mangalampalli V Phanikrishna SharmaMachiraju Subrahmanyam

Abstract

The photocatalytic degradation and mineralization of isoproturon herbicide was investigated in aqueous solution containing TiO2 over H-mordenite (H-MOR) photocatalysts under solar light. The catalysts are characterized by X-ray diffraction (XRD), UV-Vis diffused reflectance spectra (UV-Vis DRS), Fourier transform-infra red spectra (FT-IR) and scanning electron microscopy (SEM) techniques. The effect of TiO2, H-MOR support and different wt% of TiO2 over the support on the photocatalytic degradation and influence of parameters such as TiO2 loading, catalyst amount, pH and initial concentration of isoproturon on degradation are evaluated. 15wt% TiO2/H-MOR composite is found to be optimum. The degradation reaction follows pseudo-first order kinetics and is discussed in terms of Langmuir-Hinshelwood (L-H) kinetic model. The extent of isoproturon mineralization studied with chemical oxygen demand (COD) and total organic carbon (TOC) measurements and approximately 80% mineralization occurred in 5h. A plausible mechanism is proposed based on the intermediates identified by liquid chromatography-mass spectroscopy (LC-MS).

References

Jun 25, 2004·Chemical Communications : Chem Comm·Avelino Corma, Hermenegildo Garcia

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Citations

Jan 8, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sh SohrabnezhadR Rahnama
Dec 18, 2015·The Journal of Physical Chemistry. a·Murtaza SayedPengyi Zhang
Dec 8, 2009·Journal of Hazardous Materials·Mangalampalli V Phanikrishna SharmaMachiraju Subrahmanyam
Nov 21, 2009·Journal of Hazardous Materials·Huan-Yan XuGui-Jie Mao
Jul 15, 2009·Journal of Hazardous Materials·Mangalampalli V Phanikrishna SharmaMachiraju Subrahmanyam
Apr 7, 2011·Water Environment Research : a Research Publication of the Water Environment Federation·A Castro-GonzálezG Merino-Castro
Aug 18, 2020·Journal of Molecular Modeling·Xiaohua RenJinying Zhang
Aug 6, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Chirag Mandar MuleAniruddha Bhalchandra Pandit

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