PHOTOSENSITIZATION OF TIO2 BY ZNS AND BROMO THYMOL BLUE AND ITS APPLICATION IN PHOTODEGRADATION OF PARA-NITROPHENOL

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POURETEDAL H.R.; SOHRABI M.A.

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Journal: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS) Year:2016 | Volume:13 | Issue:1 Page(s): 73-79

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Title

PHOTOSENSITIZATION OF TIO2 BY ZNS AND BROMO THYMOL BLUE AND ITS APPLICATION IN PHOTODEGRADATION OF PARA-NITROPHENOL

Author(s)

POURETEDAL H.R. | SOHRABI M.A.

Keywords

PHOTOCATALYST TIO2 PARA-NITROPHENOL ZNS BROMO THYMOL BLUE

Abstract

Controlled precipitation method was used to prepare of TiO2/ZnS/BTB photocatalyst. The ZnS and bromo thymol blue (BTB) dye were used as modifier and sensitizer agents, respectively. The composition of TiO2/ZnS/BTB photocatalyst was characterized by EDX spectra, FT-IR spectra and SEM images. The XRD patterns showed the phases of routile and cubic for TiO2 and ZnS, respectively, in composite of TiO2/ZnS/BTB. The diffuse reflectance UV/VIS spectra were used to estimate of band-gap energies of samples. The band-gap energies of TiO2, TiO2/ZnS and TiO2/ZnS/BTB were obtained as 3.03, 2.76 and 2.68 eV, respectively. The TiO2/ZnS/BTB photocatalyst was used in photodegradation process of para-nitrophenol (PNP). The order of photocatalytic activity was obtained as: TiO2/ZnS/BTB > TiO2/ZnS > TiO2 that matched with the band-gap energies. The degradation efficiency of >95 % was obtained at optimized conditions of pH 6, 1.0 g/L of photocatalyst, 10 mg/L of PNP in time 180 min. The kinetic rate constants of Langmuir–Hinshelwood were decreased with increasing of initial concentration of PNP. Furthermore, the TOC result indicated the degradation of 90 % PNP in photodegradation reaction.

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APA: Copy

POURETEDAL, H.R., & SOHRABI, M.A.. (2016). PHOTOSENSITIZATION OF TIO₂ BY ZNS AND BROMO THYMOL BLUE AND ITS APPLICATION IN PHOTODEGRADATION OF PARA-NITROPHENOL. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), 13(1), 73-79. SID. https://sid.ir/paper/283269/en

Vancouver: Copy

POURETEDAL H.R., SOHRABI M.A.. PHOTOSENSITIZATION OF TIO₂ BY ZNS AND BROMO THYMOL BLUE AND ITS APPLICATION IN PHOTODEGRADATION OF PARA-NITROPHENOL. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)[Internet]. 2016;13(1):73-79. Available from: https://sid.ir/paper/283269/en

IEEE: Copy

H.R. POURETEDAL, and M.A. SOHRABI, “PHOTOSENSITIZATION OF TIO₂ BY ZNS AND BROMO THYMOL BLUE AND ITS APPLICATION IN PHOTODEGRADATION OF PARA-NITROPHENOL,” JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), vol. 13, no. 1, pp. 73–79, 2016, [Online]. Available: https://sid.ir/paper/283269/en

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