ZnS pillaring on kaolin catalyst for the photocatalytic reduction of CO2 into methanol
2014
Nor Khonisah D. | Nik Fatihah N. K
Increasing of carbon dioxide (C02) concentration in atmosphere has gain major attention by the researchers. This is because C02 can absorb heat from the UV light and emits the heat to the atmosphere resulted in earth warming. In order to overcome this problem, the researchers come out with many solutions. Conventional method and also Advanced Oxidation Process (AOP) have been invented as a way to reduce the concentration of the predominant greenhouse gases especially C02. However, AOP has come out as the emerging technologies due to its practicality in reduction process in industry. This study was focusing on one of the AOP which was photocatalytic reduction process of C02. In this study, ZnS-Kaolin was used as photocatalyst, a combination of semiconductor ZnS and phyllosilicate mineral, Kaolin. ZnS-Kaolin was prepared by using two methods which were hydrothermal and impregnation method. In this photocatalytic reduction process, the catalyst was dispersed in medium solution, NaOH aqueous and hence helps to catalyze the process. The characteristics of the developed ZnS-Kaolin were observed by using SEM, XRD and TGA. The effect of parameters such as irradiation time and dosage of ZnS-Kaoli:l catalyst were studied. Methanol as a main product was analyzed using High Performance Liquid Chromatography (HPLC). As a results, ZnS-Kaolin prepared by hydrothermal method shows better performance compared with catalyst prepared from impregnation method in photoreduction process of C02.
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