Comparative photodecolorization of red dye by anatase, rutile (TiO2), and wurtzite (ZnO) using response surface methodology

Shahab Khameneh ASL; Sayad Khatib SADRNEZHAAD

Makale detayları

Comparative photodecolorization of red dye by anatase, rutile (TiO2), and wurtzite (ZnO) using response surface methodology

Yazarlar:

Shahab Khameneh ASL | Sayad Khatib SADRNEZHAAD

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Chemistry 2012 Vol.36 Issue 1, pp.121-135

Belge Tipi:

Makale

Yayın Tarihi:

12/2011

Belge Dili:

İngilizce

Document ID (Org No.):

2000727698

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

Treatment of dye pollution containing C.I. Acid Red 14  (AR14) by a coupled photocatalytic process was studied.  Titanium  dioxide, in the form of anatase and rutile, and zinc oxide, were used  as photocatalysts.  The investigated photocatalysts were  Aldrich-produced nanopowders with crystallites of a mean size of 20-30  nm and a specific surface area of about 50 m2/g.  A comparison of  TiO2(anatase), TiO2(rutile), TiO2(a,r), and ZnO for the  decolorization of the AR14 solution was performed.  Results showed  that color removal followed the decreasing order of TiO2(a,r), ZnO  > TiO2(a,r) > TiO2(a), ZnO > TiO2(r), ZnO >TiO2(a,r) >  TiO2(a) > ZnO > TiO2(r).  Response surface methodology (RSM) was  employed to assess the individual and interactive effects of the 4  main independent parameters in the photocatalytic process.  Analysis  of variance showed a high coefficient of determination (R2 = 0.9396)  and satisfactory prediction second-order regression.  The optimum  initial amounts of TiO2(a), TiO2(r), ZnO, and dye and the  reaction time were found to be 84 ppm, 23 ppm, 86 ppm, 20 ppm, and 48  min, respectively.  It was demonstrated that RSM with suitable 2D and  3D graphs was a suitable method for finding the interactions between  parameters, identifying the main parameters, and optimizing the  operating conditions.

 

Treatment of dye pollution containing C.I. Acid Red 14  (AR14) by a coupled photocatalytic process was studied.  Titanium  dioxide, in the form of anatase and rutile, and zinc oxide, were used  as photocatalysts.  The investigated photocatalysts were  Aldrich-produced nanopowders with crystallites of a mean size of 20-30  nm and a specific surface area of about 50 m2/g.  A comparison of  TiO2(anatase), TiO2(rutile), TiO2(a,r), and ZnO for the  decolorization of the AR14 solution was performed.  Results showed  that color removal followed the decreasing order of TiO2(a,r), ZnO  > TiO2(a,r) > TiO2(a), ZnO > TiO2(r), ZnO >TiO2(a,r) >  TiO2(a) > ZnO > TiO2(r).  Response surface methodology (RSM) was  employed to assess the individual and interactive effects of the 4  main independent parameters in the photocatalytic process.  Analysis  of variance showed a high coefficient of determination (R2 = 0.9396)  and satisfactory prediction second-order regression.  The optimum  initial amounts of TiO2(a), TiO2(r), ZnO, and dye and the  reaction time were found to be 84 ppm, 23 ppm, 86 ppm, 20 ppm, and 48  min, respectively.  It was demonstrated that RSM with suitable 2D and  3D graphs was a suitable method for finding the interactions between  parameters, identifying the main parameters, and optimizing the  operating conditions.

Makale detayları

Comparative photodecolorization of red dye by anatase, rutile (TiO2), and wurtzite (ZnO) using response surface methodology

Yazarlar: Shahab Khameneh ASL | Sayad Khatib SADRNEZHAAD

Yayıncı: TUBITAK

Ana Başlıklar: Uygulamalı fizik

Dergi: Turkish Journal of Chemistry 2012 Vol.36 Issue 1, pp.121-135

Belge Tipi: Makale

Yayın Tarihi: 12/2011

Belge Dili: İngilizce

Document ID (Org No.): 2000727698

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Shahab Khameneh ASL | Sayad Khatib SADRNEZHAAD

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Chemistry 2012 Vol.36 Issue 1, pp.121-135

Belge Tipi:

Makale

Yayın Tarihi:

12/2011

Belge Dili:

İngilizce

Document ID (Org No.):

2000727698

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527