Grafting of organosilane derived from 3-glycidoxypropyltrimethoxysilane and thiourea onto magnesium phyllosilicate by sol-gel process and investigation of metal adsorption properties

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.05.011· OSTI ID:21370513

Oliveira, Andrea S ^[1]; Patnaik, Tanushree; Singh, V K ^[2]; Tiwary, D ^[3]; Airoldi, Claudio ^[1]

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1. Instituto de Quimica, Universidade Estadual de Campinas, Caixa Postal 6154, 13084-971 Caminas, Sao Paulo (Brazil)
2. Department of Applied Chemistry, Birla Institute of Technology, Mesra 835 215, Ranchi (India)
3. Department of Chemistry, Institute of Technology, Banaras Hindu University, Varanasi (India)

A layered inorganic-organic magnesium silicate (Mg-GTPS-TU) has been successfully synthesized by using sol-gel based precursor under mild temperature conditions and a new silylaing agent (GTPS-TU) derived from 3-glycidoxypropyltrimethoxysilane (GTPS) and thiourea (TU) as the silicon source. The hybrid material was characterized through elemental analysis, infrared spectroscopy, X-ray diffractometry, thermogravimetry, and carbon and silicon solid-state nuclear magnetic resonance spectroscopy. The result confirmed the attachment of organic functionality to the inorganic silicon network. The inter-lamellar distance for the hybrid material was found to be 18.8 A. Metal adsorption characteristics follows Cr(III) >Mn(II)>Zn(II) with more affinity towards Cr(III) in dilute aqueous solution. Evaluation of thermodynamic parameters DELTAH and DELTAS for Cr(III) were found to be 25.44 J mol{sup -1} and 79.9 J mol{sup -1} K{sup -1}, respectively, indicating adsorption process to be endothermic in nature. The negative value of DELTAG indicated the feasibility and spontaneity of ongoing adsorption process at relatively higher temperature. The presence of multiple coordination sites in the attached organic functionality expresses the potentiality of the hybrid material containing new silylating agent for heavy cation removal from eco-system. - Abstract: We report the synthesis and adsorption properties of a layered inorganic-organic magnesium silicate (Mg-GTPS-TU) derived from a new silylaing agent from 3-glycidoxypropyltrimethoxysilane (GTPS) and thiourea (TU) as the silicon source. Display Omitted

• OSTI ID: 21370513
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 8; Other Information: DOI: 10.1016/j.jssc.2009.05.011; PII: S0022-4596(09)00220-5; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
ADSORPTION
AQUEOUS SOLUTIONS
CARBON
CHROMIUM COMPOUNDS
GRAFT POLYMERS
INFRARED SPECTRA
MAGNESIUM SILICATES
NMR SPECTRA
SILANES
SILICON
SOL-GEL PROCESS
SYNTHESIS
THERMAL GRAVIMETRIC ANALYSIS
THIOUREAS
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
CARBONIC ACID DERIVATIVES
CHEMICAL ANALYSIS
COHERENT SCATTERING
DIFFRACTION
DISPERSIONS
ELEMENTS
GRAVIMETRIC ANALYSIS
HOMOGENEOUS MIXTURES
HYDRIDES
HYDROGEN COMPOUNDS
MAGNESIUM COMPOUNDS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SEMIMETALS
SILICATES
SILICON COMPOUNDS
SOLUTIONS
SORPTION
SPECTRA
SPECTROSCOPY
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS