SEM image and GC/MS data for "Photocatalysis using Zinc Oxide-Zinc Phthalocyanine Composite for Effective Mineralization of Organic Pollutants
The dataset includes figures and a table. The SEM image of ZnO-ZnPc composite and the various GC–MS figures of intermediates fragments of Reactive dark blue M-2GE (C. I. Reactive Blue 194) at 20, 40, 60, 80, 100, 120, 140 and 160 minutes (min) in an experimental test performed to ascertain the effectiveness of Zinc oxide-Zinc Phthalocyanine composite for the photodegradation of the dye is identified in the dataset. Two SEM images of the ZnO-ZnPc composite were presented in Figure 1(a) and (b) with a magnification of (a) as x 3,000 and (b) as x 3,300. The SEM micrographs indicate a crystalline nature of the synthesized ZnO-ZnPc composite. The SEM image of the ZnO-ZnPc composite at low magnification (a) shows loose grain particles. Close view at high magnification (b), shows a high crystalline nature of ZnO-ZnPc composite. The particle size was in nanoscale. Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8 and Figure 9 of the dataset shows the gas chromatogram of degradation of the sample at 20, 40, 60, 80, 100, 120, 140 and 160 minutes. Similar retention time peaks were obtained. Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, Figure 16 and Figure 17 of the dataset also shows the mass spectrum of degradation of the samples at 20, 40, 60, 80, 100, 120, 140 and 160 minutes. The spectrum for the various times showed similar fragment peaks. The retention time of peaks and suggested molecular weight of fragments of these compounds indicated that in the degradation of Reactive dark blue M-2GE, were most likely broken down into compounds with lower molecular weight. Table 1 in the dataset showed the common intermediate compound identified by the GC/MS for the various degradation time. The common intermediates include analine (m/z 91), nitrobenzene(m/z 119), phenol (m/z 93), 3,6,8-trihydroxynaphthylamine (m/z 191), benzo-1,4-quinone (m/z 109), phthalic acid (m/z 161), maleic acid (m/z 113), oxalic acid (m/z 87) and acetic acid (m/z 57).
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SEM images of ZnO-ZnPc composite were carried out with JOEL JSM-6390 LV scanning electron microscope. The microscope was used to determine the surface form and structure of the ZnO-ZnPc composite used in this study. Before scanning of ZnO-ZnPc composite, coating was done by evaporating a thin layer (between 5-50nm) of conductive carbon on the surface of the samples. Carbon evaporation provided a conduction path for the non-conductive samples to be imaged at high voltages (30kV). The ZnO-ZnPc composite was prepared for analysis by taping the samples on aluminium stubs using carbon adhesive sheets for stability. The stubs were fit into the sample holder on the sample plate to analyze. Degraded samples were extracted at hexane and acetonitrile interphase and dried of water traces. Concentrates of extracted samples were obtained by nitrogen gas interaction with 0.35 oxygen gas density at 99% purity. Concentrated samples contained in vials were analyzed by SHIRMADZA GC-MS QP 2020 to identify intermediate compounds. A DB-5ms column with 30m × 0.25 mm and 0.25 um film thickness was used. The temperature was set at 65.0°C for 1 min, increased at 15 °C min-1 rates to 200°C then raised again at 20°C min-1 rates to 300C° and maintained in 5 min. A 70 eV ionization, injection pot temperature of 200 °C and splitless injection mode with helium carrier gas was used. For the MS analysis, the ion source temperature was 220°C with an interphase temperature of 290°C. Analysis was run on scan mode with start m/z 50.00 to m/z 1030.