Synthesis and catalytic activity of TiO 2 nanoparticles for photochemical oxidation of concentrated chlorophenols under direct solar radiation

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Abstract

The titanium dioxide (TiO 2) nanoparticles catalyst was synthesized via sol-gel method using the titanium tetra-isopropoxide as starting material. The effects of calcination temperatures on the crystalline structure, surface area and photocatalytic activity of TiO 2 nanoparticles were investigated. The anatase to rutile percentage decreases when temperatures greater than 500°C and evaluated from XRD intensity of (101) and (110) peak, respectively. Photocatalytic activity of TiO 2 nanoparticles was tested by the degradation of chlorophenols namely, 2-chlorophenol (2-CP), 2, 4-dichlorophenol (2,4-DCP) and 2, 4,6-trichlorophenol (2,4,6T-CP) within range from 50 to 150 mgl -1 initial concentrations under direct solar radiation. The results of photodegradation, 99, 98 and 92% was obtained for 50 mgl -1 of 2-CP, 2,4-DCP and 2,4,6-TCP receptively after 90 min irradiation time at pH of 6. At the same time, the efficiency value was decreased with initial concentration more than 50 mgl -1. The chemical oxygen demand (COD) removal follows the photodegradation in behavior was observed. The kinetic studies indicate that the reaction was following to first order and decrease of rate constant (K app) with initial concentration more than 50 mgl -1.

Original languageEnglish
Pages (from-to)4871-4888
Number of pages18
JournalInternational Journal of Electrochemical Science
Volume7
Issue number6
Publication statusPublished - 2012

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Chlorophenols
Solar radiation
Catalyst activity
Photodegradation
Nanoparticles
Oxidation
Titanium dioxide
Chemical oxygen demand
Titanium
Application programs
Calcination
Sol-gel process
Rate constants
Irradiation
Crystalline materials
Degradation
Temperature
Catalysts
Kinetics
titanium dioxide

Keywords

  • Chlorophenols
  • Sol-gel
  • Solar photocatalytic
  • Tio nanoparticles

ASJC Scopus subject areas

  • Electrochemistry

Cite this

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title = "Synthesis and catalytic activity of TiO 2 nanoparticles for photochemical oxidation of concentrated chlorophenols under direct solar radiation",
abstract = "The titanium dioxide (TiO 2) nanoparticles catalyst was synthesized via sol-gel method using the titanium tetra-isopropoxide as starting material. The effects of calcination temperatures on the crystalline structure, surface area and photocatalytic activity of TiO 2 nanoparticles were investigated. The anatase to rutile percentage decreases when temperatures greater than 500°C and evaluated from XRD intensity of (101) and (110) peak, respectively. Photocatalytic activity of TiO 2 nanoparticles was tested by the degradation of chlorophenols namely, 2-chlorophenol (2-CP), 2, 4-dichlorophenol (2,4-DCP) and 2, 4,6-trichlorophenol (2,4,6T-CP) within range from 50 to 150 mgl -1 initial concentrations under direct solar radiation. The results of photodegradation, 99, 98 and 92{\%} was obtained for 50 mgl -1 of 2-CP, 2,4-DCP and 2,4,6-TCP receptively after 90 min irradiation time at pH of 6. At the same time, the efficiency value was decreased with initial concentration more than 50 mgl -1. The chemical oxygen demand (COD) removal follows the photodegradation in behavior was observed. The kinetic studies indicate that the reaction was following to first order and decrease of rate constant (K app) with initial concentration more than 50 mgl -1.",
keywords = "Chlorophenols, Sol-gel, Solar photocatalytic, Tio nanoparticles",
author = "Ba-Abbad, {Muneer M.} and Kadhum, {Abdul Amir H.} and Mohamad, {Abu Bakar} and Takriff, {Mohd Sobri} and Kamaruzzaman Sopian",
year = "2012",
language = "English",
volume = "7",
pages = "4871--4888",
journal = "International Journal of Electrochemical Science",
issn = "1452-3981",
publisher = "Electrochemical Science Group",
number = "6",

}

TY - JOUR

T1 - Synthesis and catalytic activity of TiO 2 nanoparticles for photochemical oxidation of concentrated chlorophenols under direct solar radiation

AU - Ba-Abbad, Muneer M.

AU - Kadhum, Abdul Amir H.

AU - Mohamad, Abu Bakar

AU - Takriff, Mohd Sobri

AU - Sopian, Kamaruzzaman

PY - 2012

Y1 - 2012

N2 - The titanium dioxide (TiO 2) nanoparticles catalyst was synthesized via sol-gel method using the titanium tetra-isopropoxide as starting material. The effects of calcination temperatures on the crystalline structure, surface area and photocatalytic activity of TiO 2 nanoparticles were investigated. The anatase to rutile percentage decreases when temperatures greater than 500°C and evaluated from XRD intensity of (101) and (110) peak, respectively. Photocatalytic activity of TiO 2 nanoparticles was tested by the degradation of chlorophenols namely, 2-chlorophenol (2-CP), 2, 4-dichlorophenol (2,4-DCP) and 2, 4,6-trichlorophenol (2,4,6T-CP) within range from 50 to 150 mgl -1 initial concentrations under direct solar radiation. The results of photodegradation, 99, 98 and 92% was obtained for 50 mgl -1 of 2-CP, 2,4-DCP and 2,4,6-TCP receptively after 90 min irradiation time at pH of 6. At the same time, the efficiency value was decreased with initial concentration more than 50 mgl -1. The chemical oxygen demand (COD) removal follows the photodegradation in behavior was observed. The kinetic studies indicate that the reaction was following to first order and decrease of rate constant (K app) with initial concentration more than 50 mgl -1.

AB - The titanium dioxide (TiO 2) nanoparticles catalyst was synthesized via sol-gel method using the titanium tetra-isopropoxide as starting material. The effects of calcination temperatures on the crystalline structure, surface area and photocatalytic activity of TiO 2 nanoparticles were investigated. The anatase to rutile percentage decreases when temperatures greater than 500°C and evaluated from XRD intensity of (101) and (110) peak, respectively. Photocatalytic activity of TiO 2 nanoparticles was tested by the degradation of chlorophenols namely, 2-chlorophenol (2-CP), 2, 4-dichlorophenol (2,4-DCP) and 2, 4,6-trichlorophenol (2,4,6T-CP) within range from 50 to 150 mgl -1 initial concentrations under direct solar radiation. The results of photodegradation, 99, 98 and 92% was obtained for 50 mgl -1 of 2-CP, 2,4-DCP and 2,4,6-TCP receptively after 90 min irradiation time at pH of 6. At the same time, the efficiency value was decreased with initial concentration more than 50 mgl -1. The chemical oxygen demand (COD) removal follows the photodegradation in behavior was observed. The kinetic studies indicate that the reaction was following to first order and decrease of rate constant (K app) with initial concentration more than 50 mgl -1.

KW - Chlorophenols

KW - Sol-gel

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