Abstract:
This research aimed to study the preparation of carbon water filters from bamboo charcoal coated by SiC and SiO2/g-C3N4 photocatalyst. It consists of 4 parts as follows,1) bamboo charcoal was prepared by carbonization. After that, coated with silica from rice husk by Electrophoretic deposition method (EPD). 2) Synthesis of SiC by carbothermic reactions of bamboo charcoal coated with silica were studied at 1400, 1500 and 1600 oC for 1, 2 and 3 hr in argon atmosphere. 3) SiO2/g-C3N4 photocatalyst was prepared by two methods: (1) mixing of g-C3N4 and SiO2 by ball milling for 24 hr and (2) pyrolysis of urea and SiO2 at 600 oC for 2 hr in nitrogen atmosphere were performed. And the last part, 4) coating bamboo charcoal coated by SiC with SiO2/g-C3N4 photocatalyst by EPD method. The results showed coated SiC on charcoal and beta-SiC nanowire was generated at 1400 oC for 1 hr. However, at 1400 oC for 2 hr showed the highest strength about 14.10 MPa. For photocatalytic activity of SiO2/g-C3N4, it was shown that at 5 wt% of silica prepared from method 1 enhanced the photocatalytic reaction by promoting higher cylallinity of g-C3N4. While at 10 wt% silica prepared from method 2 had resulted in lower band gap. The result of the methylene blue dye degradation efficiencies of the two synthesized method was 97.91% and 95.75%, respectively. The capability of filtering water at 0.33 MPa with a filtration rate of 53 mL/min.