期刊
CHEMISTRYSELECT
卷 6, 期 5, 页码 995-1007出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202004567
关键词
Activated carbon; Alizarin yellow R; NiFe2O4; Photocatalysis; S-Scheme; Metal-organic frameworks
资金
- Egyptian Petroleum Research Institute (EPRI)
In this study, NiFe2O4@AC/UiO-66(Zr) composites with different ratios of UiO-66(Zr) as support were successfully prepared and evaluated for their photodegradation efficiency of alizarin yellow R (AYR) under visible-light. NiFe2O4@AC/UiO-66(Zr)-2 exhibited the highest photoreactivity and the lowest bandgap, showing the highest photodegradation efficiency under visible-light.
In this study, NiFe2O4@AC/UiO-66(Zr) composites were successfully prepared with different ratios of UiO-66(Zr) as support for NiFe2O4@AC, (1 : 1), (2 : 1) and (3 : 1) named NiFe2O4@AC/UiO-66(Zr)-1, NiFe2O4@AC/UiO-66(Zr)-2 and NiFe2O4@AC/UiO-66(Zr)-3, respectively. The prepared composites were characterized by X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-Ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), ultraviolet-visible diffuse reflectance (UV-Vis/DRS) spectroscopy, PL (Photoluminescence) study. The synthesized composites ' efficiencies to enhance the photodegradation of alizarin yellow R (AYR) under visible-light were evaluated. The results identified that NiFe2O4@AC/UiO-66(Zr)-2 is the most photoreactive photocatalyst with the lowest bandgap similar to 1.7 eV. NiFe2O4@AC/UiO-66(Zr)-2 shows higher photodegradation efficiency (97.9 %) compared to NiFe2O4@AC/UiO-66(Zr)-1 and NiFe2O4@AC/UiO-66(Zr)-3 with photodegradation efficiency of 75.1 % and 89.9 %, respectively after 180 min under visible-light. The photodegradation reaction of AYR was found to be pseudo first-order reaction, and the rate constant (Ka) for NiFe2O4@AC/UiO-66(Zr)-1, NiFe2O4@AC/UiO-66(Zr)-2, and NiFe2O4@AC/UiO-66(Zr)-3 are 0.0072 min(-1), 0.0204 min(-1), and 0.0122 min(-1), consecutively. The effects of various conditions such as initial concentration and photocatalyst dose on the photodegradation of AYR were determined. The high photodegradation efficiency of NiFe2O4@AC/UiO-66(Zr)-2 composite is because of the heterojunction and effective charge transfer between NiFe2O4@AC and UiO-66(Zr). NiFe2O4@AC/UiO-66(Zr)-2 photocatalyst exhibits photocatalytic stability and reusability up to five cycles.
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