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Solar photocatalytic degradation of isoproturon over TiO2/H-MOR composite systems.
J Hazard Mater. 2008 Dec 30; 160(2-3):568-75.JH

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).

Authors+Show Affiliations

Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology, Hyderabad 500607, India.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18434002

Citation

Sharma, Mangalampalli V Phanikrishna, et al. "Solar Photocatalytic Degradation of Isoproturon Over TiO2/H-MOR Composite Systems." Journal of Hazardous Materials, vol. 160, no. 2-3, 2008, pp. 568-75.
Sharma MV, Durgakumari V, Subrahmanyam M. Solar photocatalytic degradation of isoproturon over TiO2/H-MOR composite systems. J Hazard Mater. 2008;160(2-3):568-75.
Sharma, M. V., Durgakumari, V., & Subrahmanyam, M. (2008). Solar photocatalytic degradation of isoproturon over TiO2/H-MOR composite systems. Journal of Hazardous Materials, 160(2-3), 568-75. https://doi.org/10.1016/j.jhazmat.2008.03.042
Sharma MV, Durgakumari V, Subrahmanyam M. Solar Photocatalytic Degradation of Isoproturon Over TiO2/H-MOR Composite Systems. J Hazard Mater. 2008 Dec 30;160(2-3):568-75. PubMed PMID: 18434002.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Solar photocatalytic degradation of isoproturon over TiO2/H-MOR composite systems. AU - Sharma,Mangalampalli V Phanikrishna, AU - Durgakumari,Valluri, AU - Subrahmanyam,Machiraju, Y1 - 2008/03/20/ PY - 2007/11/08/received PY - 2008/03/10/revised PY - 2008/03/10/accepted PY - 2008/4/25/pubmed PY - 2009/2/10/medline PY - 2008/4/25/entrez SP - 568 EP - 75 JF - Journal of hazardous materials JO - J Hazard Mater VL - 160 IS - 2-3 N2 - 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). SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18434002/Solar_photocatalytic_degradation_of_isoproturon_over_TiO2/H_MOR_composite_systems_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(08)00408-1 DB - PRIME DP - Unbound Medicine ER -