Thermal analysis of CsH2PO4 nanoparticles using surfactants CTAB and F-68

S. Hosseini, Abu Bakar Mohamad, A. H. KaHum, Wan Ramli Wan Daud

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A study concerned to thermogravimetric analysis is performed in cesium dihydrogen phosphate (CsH2PO4) that was synthesized, using cetyltrimethylammonium-bromide (CTAB), polyoxyethylene-polyoxypropylene (F-68) and mixture of (F-68:CTAB) with two mole ratio 0.06 and 0.12 as surfactant. The dehydration behavior of particles was studied using thermal gravimetric analysis and differential scanning calorimetric. Subsequently, the experimental results indicated that the first dehydration temperature in the range of 237-239 °Cupon heating, the second peaks occur at temperature range 290-295 °C and overlapping in the thermogravimetric events is observed. The mass loss values are obtained in the range of 6.62-6.97 wt% that is less than reported theoretical value 7.8 wt%. These values show well compatibility of reaction CsH2PO4 to Cs2H2P2O 7 with 3.92 wt% whereas mass loss value of CsH2PO 4 to CsPO3 is less than theoretical value 7.8 wt%. The activation energy of two steps dehydration are calculated using Kissinger equation for the samples synthesized via CTAB and (F-68) with minimum value mass loss 6.62% and maximum value mass loss 6.97%, respectively. The calculation results reveal that the reaction rate in the first step (CsH2PO 4 → Cs2H2P2O7) is faster than the second step (CsH 2PO4 → CsPO3). The weight loss values of the samples demonstrate that existence of CTAB can be considered as effective factor which prevents more weight loss during the dehydration process.

Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalJournal of Thermal Analysis and Calorimetry
Volume99
Issue number1
DOIs
Publication statusPublished - Jan 2010

Fingerprint

Surface-Active Agents
Thermoanalysis
bromides
thermal analysis
surfactants
Nanoparticles
Dehydration
dehydration
nanoparticles
Cesium
Gravimetric analysis
cesium
compatibility
Reaction rates
Thermogravimetric analysis
cetrimonium
phosphates
reaction kinetics
Activation energy
Phosphates

Keywords

  • CsHPO
  • Dehydration
  • Nanoparticle
  • Surfactants

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics

Cite this

Thermal analysis of CsH2PO4 nanoparticles using surfactants CTAB and F-68. / Hosseini, S.; Mohamad, Abu Bakar; KaHum, A. H.; Wan Daud, Wan Ramli.

In: Journal of Thermal Analysis and Calorimetry, Vol. 99, No. 1, 01.2010, p. 197-202.

Research output: Contribution to journalArticle

Hosseini, S. ; Mohamad, Abu Bakar ; KaHum, A. H. ; Wan Daud, Wan Ramli. / Thermal analysis of CsH2PO4 nanoparticles using surfactants CTAB and F-68. In: Journal of Thermal Analysis and Calorimetry. 2010 ; Vol. 99, No. 1. pp. 197-202.
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abstract = "A study concerned to thermogravimetric analysis is performed in cesium dihydrogen phosphate (CsH2PO4) that was synthesized, using cetyltrimethylammonium-bromide (CTAB), polyoxyethylene-polyoxypropylene (F-68) and mixture of (F-68:CTAB) with two mole ratio 0.06 and 0.12 as surfactant. The dehydration behavior of particles was studied using thermal gravimetric analysis and differential scanning calorimetric. Subsequently, the experimental results indicated that the first dehydration temperature in the range of 237-239 °Cupon heating, the second peaks occur at temperature range 290-295 °C and overlapping in the thermogravimetric events is observed. The mass loss values are obtained in the range of 6.62-6.97 wt{\%} that is less than reported theoretical value 7.8 wt{\%}. These values show well compatibility of reaction CsH2PO4 to Cs2H2P2O 7 with 3.92 wt{\%} whereas mass loss value of CsH2PO 4 to CsPO3 is less than theoretical value 7.8 wt{\%}. The activation energy of two steps dehydration are calculated using Kissinger equation for the samples synthesized via CTAB and (F-68) with minimum value mass loss 6.62{\%} and maximum value mass loss 6.97{\%}, respectively. The calculation results reveal that the reaction rate in the first step (CsH2PO 4 → Cs2H2P2O7) is faster than the second step (CsH 2PO4 → CsPO3). The weight loss values of the samples demonstrate that existence of CTAB can be considered as effective factor which prevents more weight loss during the dehydration process.",
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