List of Accepted manuscripts:


Synthesis and characterization of TiO2  from Lampung’s Iron Sand using leaching method with temperature variation

Author: Iqbal Firdaus, Anggi Stevani, Yudhistira Novita Handayani, Nadia Febriyanti and Roniyus Marjunus, Posman Manurung
Abstract: This research aims to determine the content of TiO2 from Lampung’s iron sand by leaching method with temperature variation. The iron sand was mixed with sodium hydrogen carbonate (NaHCO3), then roasted at 700˚C for an hour. This research used 5 samples with leaching temperature variation of 70, 80, 90, 100, and 110˚C for 2 hours. The acid leaching process used HCl 12 M with a ratio of iron sand, and HCl was 1:4, for the water leaching process used 50 ml of distilled water. Furthermore, samples were characterized using XRD and XRF to determine the content of Lampung’s iron sand. The result shows that the highest amount of TiO2 was obtained in a sample with a leaching temperature of 110˚C at 2 hours, i.e., 60.701%.

Reducing the electrical conductivity of ZnO/Ag nanofiller for solid polymer electrolytes prepared by laser ablation in polyactic acid solution

Author: Permono A. Putro, Nurfina Yudasari, Yulia Irdawati, Ahmad S. Sulaeman, and Akhiruddin Maddu
Abstract: Solid polymer electrolytes (SPEs) are vital components of fast appearing technology for energy storage-conversion devices. Here, SPEs based on silver (Ag) and zinc oxide (ZnO) nanoparticles are prepared by laser ablation in polylactic acid (PLA) at room temperature. The comparison study of PLA, PLA-ZnO, PLA-ZnO/Ag, and PLA-Ag -based SPEs is conducted in pursuance of the electrical conductivity obtained from electrochemical impedance spectroscopy (EIS) characterization. EIS provides comprehensive analyses, including DC and AC conductivities, dielectric constant, and electrical modulus of the samples. Our results show that PLA-ZnO exhibits an appreciable value of DC conductivity, which insignificantly decreases by Ag addition into PLA-ZnO/Ag. This study suggests that PLA-ZnO remains stable by Ag incorporation; hence, PLA-ZnO/Ag has a great potential as SPEs.

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