روند سنتز سولووترمال و الکتروشیمیایی HKUST-1 و بررسی گنجایش ذخیره‌سازی متان

ABSTRACT Solvothermal and electrochemical synthetic method of HKUST-1 and its methane storage capacity

Synthesis of HKUST-1 was firstly reported by Cui et al. [12] through solvothermal for 12 hours at a temperature of 180 °C. However, these reaction conditions lead to the formation of impurities in the form of CuO due to the influence of a high reaction temperature. Schlichte et al. [14b] had optimized

the solvothermal reaction in order to get purer crystal of HKUST-1 from Cu2O impurity by conducting in the solvent mixture water: ethanol (1:1) with a source of Cu2+ in the form of salts, for example Cu( NO3)2. 3H2O or CuCl2.4H2O but using a lower reaction temperature of about 120 °C. The result is a bluish-green crystal which was then washed with ethanol and dried at room temperature with stable frameworks after the drying process and activation. However, the used Cu2+ salt led to the formation of acidic by-product that is certainly not environmentally friendly. Reaction time of 12

hours is also considered ineffective, therefore efficient and environmentally friendly synthetic method that is required. In this paper we have tried to use innovation and green synthetic method by electrolysis and then we have compared to solvothermal product. In the electrochemical method, the source of metal salt is from the metal electrode itself; in this case is the copper-plate. The reaction is supported by the presence of the electrolyte, TBATFB. The general reaction scheme of the electrolysis process to synthesize HKUST-1 is depicted in Scheme 1.