| Summary: | 碩士 === 中原大學 === 化學工程研究所 === 106 === Photocatalytic-Membrane Reactor (PMR) has been widely used in wastewater removal in recent years. Compared to batch photodegradation system, not only photocatalyst can be separated from liquid phase in PMR, but also the removal efficiency can be increased significantly. In this study, we design a PMR system to remove wastewater containing methyl blue, methyl orange, phenol, and mixed organic dyes.
In this study, phosphorus-doped graphite-type carbon nitride (PCN) was prepared in an attempt to coat on the substrate. XRD patterns show the diffraction peaks of PCN are located at 13.1° and 27.1°, which can be confirm as the (100) and (002) crystal plane of graphite-type carbon nitride(C3N4). In PL analysis, the emission peak of PCN is lower than C3N4, which can be contributed to the phosphorus doping. In photodegradation reactions, 10 wt% of phosphorus-doped C3N4 (10PCN) showed the highest degradation activity under visible light irradiation among the samples.
In the hollow fiber membrane system, an inorganic hollow fiber membrane was prepared by spinning using an alumina solution. SEM images revealed the pore diameter of the membrane was approximately 1.2 mm and the membrane thickness was around 200 μm. To fabricate a PMR system, PCN was integrated with PMR system for wastewater treatment under irradiation of metal halide lamp. The removal efficiency of the PMR system is 1.63 and 1.22 times higher than the batch photodegradation system and the membrane system, respectively. The PMR system show high stability and can effectively removal different kinds of organic wastewater.
KEYWORDS: Photocatalytic-Membrane Reactor, phosphorus doping, graphite carbon nitride, methyl blue, visible light
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