Papers by Keyword: NaHCO₃

Abstract: Water is a chemical compound with chemical formula H₂O. By the electrolysis proses, water can be split constituent elements, namely hydrogen (H₂) and oxygen (O₂). In this study, an electrolyze system used six pieces of electrodes which made from 304L SS for electrolysis process for both of distilled water and adding catalyst NaHCO3 (Sodium Bicarbonate) on distilled water. The results indicated that electrolysis process on distilled water consumed power of 353.52 Watts to produce Brown’s gas of 0.00123 l/s. Whenever, NaHCO3 was added into distilled water with the mass fraction of 1.33% consumed power decrease of 27.89 Watts and Browns gas was produced 0.0017 l/s. The efficiency of distilled water had the greatest efficiency only 5.53% by using current of 2 Ampere and power reached 31.043Watts. While the addition of catalysts had the greatest efficiency reached 40.29% in the use of mass fraction of catalyst 1.5%, 6 Ampere currents and power of 19.829 Watts.

Abstract: The CeO₂ is prepared directly from bastnaesite as raw material that originated in Dechang, Sichuan province, China. Fully mixed with sodium bicarbonate (NaHCO₃) and roasted at 550 °C, the rare earth element (REE) in bastnaesite transformed into rare earth oxide. And the CeO₂ will be obtained by removing NaF through water washing and leaching the impurity elements including La, Fe, Al, Ca, etc. via hydrochloric acid (HCl). The CeO₂ was characterized by X-ray diffraction (XRD) and X-ray fluorescence (XRF). The XRF results demonstrated that the content of CeO₂ could reach more than 70% in products which can be used as polishing material.

Abstract: Methyl orange decoloration was conducted in the solution containing NaHCO3. TiO2 and the mixture of TiO2 and HZSM-5 were used as the photocatalysts. The addition of TiO2 greatly changed adsorption of methyl orange in solutions containing different concentration of NaHCO3. The existence of NaHCO3 can improve photocatalytic degradation of the dye under UV irradiation in the solution containing TiO2. As high as 55% decoloration of the dye occurred in the solution containing 1.0 mol/l NaHCO3. When NaHCO3 concentration was lower than 0.08 mol/l, adsorption of the dye was fairly weak on the mixture. At the same time, decoloration of the dye deceased with increasing NaHCO3 concentration. When NaHCO3 concentration was high, adsorption and decoloration of the dye were better at higher NaHCO3 concentration.

Abstract: PEG1000 was used as template to prepare porous TiO₂ film by sol-gel method. The functions of applied potential and concentration of NaHCO₃ to the photoelectrocatalytic degradation of methyl orange on porous and smooth TiO₂ films were investigated. Methyl orange degradation rate has two optimal values at the applied potential of 0.8 V and 1.8 V. The addition of PEG may have negative effect on photoelectrocatalytic activity of TiO₂ film. The degradation rate increases with increasing NaHCO₃ concentration from 0 up to 0.05 mol/l, and then it declines after further increase of electrolyte concentration. After 100 min of reaction, the degradation rates on the films prepared without and with PEG addition are 63.78% and 65.22%, respectively.