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AHMED SHERAZ,카즈미 와자하트 와히드,Hussain Amjad,Khan Muhammad Zubair,Bibi Saira,Saleem Mohsin,송락현,Sajid Zaman,Ullah Abid,Muhammad Kashif Khan 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.2
Herein, we report a facilely synthesized Sm0.5Sr0.5CoO3 (SSC) nano-catalyst as a cathode material for the solid oxide fuel cell (SOFC). The SSC nano-catalyst was synthesized by a sol–gel process using citric acid and metal nitrates and calcination was performed at a relatively low temperature of 1250 ℃. The crystallinity and morphology of the catalyst were observed by the X-ray diffraction and scanning electron microscope. The average particle size of the SSC powder was 100 nm after calcination at 1250 °C. The resulting SSC material was employed as a cathode for the SOFC. The SOFC cell with highly active SSC showed a peak power density of 900 mWcm−2 at 700 °C. The single cell with an SSC cathode showed excellent stability under the accelerated operating conditions of 0.5A/cm2 and 650 °C for 1250 min. The cell performance was enhanced during the initial hours of the long-term operation which is attributed to the cathode activation process and improved cathode/buffer layer interface contact. This work features a cost-effective, scalable, and reproducible method for the production of highly robust SSC cathode material for the SOFC under relatively low calcination temperatures.
Jadoon Aniqa,Ali Zarshad,Farooq W.A.,Ali Farman,Price Gareth J.,Taimur Shaista,Atif M.,AlMutairi Mona A.,Yaqub Nafeesah,Bibi Saira 한국물리학회 2022 Current Applied Physics Vol.40 No.-
In this investigation, the practicability of utilizing 3-aminopropyl triethoxysilane (3-APTES) crosslinked chitosan (Ch)/graphene oxide (GO) membranes were explored for adsorptive removal of anionic dyes from aqueous medium. Membranes were successfully fabricated through solution casting technique. Strong interactions amongst matrix (chitosan), 3-APTES, polyvinylpyrrolidone (PVP) and GO were confirmed by Infrared spectroscopy. Thermal stability of the chitosan was improved by adding graphene oxide and results were verified via thermogravimetric (TGA) analysis. Swelling and hydrolytic results confirmed that 2 %-Ch/PVP was a stable membrane while increasing the amount of 3-APTES in the chitosan nanocomposites membrane decreased its stability in aqueous medium. The adsorption characteristics of the membranes were evaluated by the adsorption of Congo red (CR) dye from aqueous medium. The adsorbent can remove 80% of CR from aqueous medium and follows second order kinetics. This study outlines the possibility of exploring green membranes which can be easily fit in various flow systems.