Copperphthalocyanine immobilized Zn/Al LDH as photocatalyst under solar radiation for decolorization of methylene blue
✍ Scribed by K.M. Parida; N. Baliarsingh; B. Sairam Patra; J. Das
- Book ID
- 103834632
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 215 KB
- Volume
- 267
- Category
- Article
- ISSN
- 1381-1169
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✦ Synopsis
Zn/Al hydrotalcite-like compounds (HTlcs) with Zn/Al molar ratios of 2:1, 3:1, 4:1 were synthesized by co-precipitation method and were used as supports for the immobilization of Cu(II) tetrasulphonated phthalocyanine (CuPcTs). XRD and UV-vis DRS were used to characterize the solids after adsorption of CuPcTs on HTlcs. The photocatalytic decolorization of methylene blue (MB) was studied under solar radiation over Zn/Al (2:1)-(CuPcTs) and the corresponding dark control was also carried out for comparison purposes. The effect of time, pH, adsorbate concentration, catalyst dosage, H 2 O 2 , potassium persulphate and sodium chloride amount was studied as a function of the percentage of decolorization. The percentage of decolorization increases with the increase in pH of solution. A maximum of 75% decolorization of methylene blue was achieved at 4 h solar irradiation as against 33% in dark control. The process obeys pseudo-first order kinetics.