研究目的
Investigating the photocatalytic degradation of Direct Blue 71 dye using Mn doped ZnO nano material under visible light irradiation.
研究成果
Mn doped ZnO nano photocatalyst showed very good catalytic activity in the visible-light induced degradation of DB 71 dye, with optimal conditions at pH 6.86, 3 g L-1 of MnDZ catalyst, and 10 ppm of DB 71 dye. The catalyst exhibited pseudo-first-order kinetics and excellent reusability.
研究不足
The study is limited to the degradation of Direct Blue 71 dye under visible light irradiation using Mn doped ZnO nano photocatalyst. The efficiency may vary with different pollutants or under different light conditions.
1：Experimental Design and Method Selection:
Mn doped ZnO nano photocatalyst was prepared via co-precipitation method and characterized by XRD, FT-IR, UV–Vis-DRS, FE-SEM, and TEM.
2：Sample Selection and Data Sources:
Direct Blue 71 dye was used as the pollutant.
3：List of Experimental Equipment and Materials:
Perkin Elmer 6X FT-IR spectrophotometer, Shimadzu UV-2450, X’ per PRO diffractometer, Philips model (Tecnai 10) transmission electron microscope, Shimadzu UV 2101PC spectrometer, Digisun pH meter (Model 2001), HITACHI-SU6600 field emission scanning electron microscope, Merck COD- Spectroquant TR 320 model.
4：Experimental Procedures and Operational Workflow:
The photocatalytic activities were tested under visible light irradiation using a Heber visible annular type photo reactor model HVAR with a Tungsten (500w) lamp.
5：Data Analysis Methods:
The kinetics of photo degradation was analyzed using pseudo-first-order kinetics.
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Perkin Elmer 6X FT-IR spectrophotometer
6X
Perkin Elmer
Recording IR spectra using KBr pellets.
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Shimadzu UV-2450
UV-2450
Shimadzu
Recording diffuse reflectance spectra.
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Shimadzu UV 2101PC spectrometer
UV 2101PC
Shimadzu
UV spectral measurements.
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HITACHI-SU6600 field emission scanning electron microscope
SU6600
HITACHI
Examining the morphology of catalyst.
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X’ per PRO diffractometer
X’ per PRO
Obtaining powder X-ray diffraction patterns.
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Philips model (Tecnai 10) transmission electron microscope
Tecnai 10
Philips
Recording transmission electron microscope images.
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Digisun pH meter
2001
Digisun
Measuring pH values.
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Merck COD- Spectroquant TR 320 model
TR 320
Merck
Measuring chemical oxygen demand.
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