Yesterday, started from 08.00 a.m., four doctoral students presented the progress of their research work relating with their dissertation. The seminar of the progress report is held periodically by the department to monitor the progress of work carried out by doctoral students. Srie Muljani presented her research on the preparation of silica-based materials from geothermal sludge. Geothermal sludge is solid waste of geothermal power plant. The solid waste was taken from the geothermal power plant located in Dieng plateau, Central Java. The silica content in geothermal sludge is approximately 85% that make it a viable raw material for advanced silica-based materials.
Nanik Astuti Rahman presented her work on the preparation of amine-grafted silica gel from bagasse ash for CO2 removal. Bagasse ash is solid waste of sugar cane mills. There are many sugar cane mills in East Java, Indonesia. Most of the sugar cane mills use bagasse, a cellulose fiber remaining after extracting the cane juice, as fuel for boilers to generate steam during sugar processing. Bagasse ash is rich in silica (>51%) and can be a viable raw material for advanced silica-based materials. In addition, silica surface is rich in silanol group that make it possible to graft other functional group for specific purpose such as CO2 removal.
Adrian Nur presented his research work on the synthesis of nanosized hydrozyapatite (HA) by electrochemical method. HA is phosphate mineral encountered in bone and dental that make it biocompatible for use as bioimplant. There were two possible phase of phosphate formed using this method: HA and brushite. The initial phase after beginning the electrolysis was brushite and after that, it converted into HA. Aging the suspension after electrolysis also could convert brushite into HA.
Nazriati presented her work on the effect of Ni doping on the properties of silica aerogel produced from bagasse ash by ambient pressure drying. The presence of Ni seems to decrease the surface area of the silica aerogel. The Ni-doped silica aerogel will be tested for their capability to adsorb hydrogen. Previous studies showed that doping of Ni on MCM-41 enhanced the capacity of hydrogen storage.
Three master students presented their report the day before. They were Ni Made Intan Putri Suari, Vania Mitha Pratiwi and Zarra Miantina Putrie. Intan presented her work on electrodeposition of nanosized silica on steel for corrosion protection, Mitha on the electrochemical performance of Fe3O4/C composite as anode material for rechargable batteries and Zarra on sulfonate-grafted silica/chitosan membrane for proton exchange membrane.
Two weeks before, our bachelor students presented their poster paper. The topics are as the following:
- Wangling – Rizka: Fe3O4/C composite as anode material for rechargable batteries
- Ina -Tigor: Synthesis of MnO2 by electrolysis of KMnO4
- Andar – Supri: Silica/C composite from geothermal sludge
- Irul – Fanny: Electrophoretic deposition of Hydroxyapatite/SiO2 on titanium for dental implant
- Yuni – Merry: Preparation of sulfonate-grafted silica from sodium silicate as an acid catalyst
- Ima – Dwi: Grafting of amine on silica produced from bagasse ash for CO2 adsorbent
- Winny – Kiki: Thermal insulator from silica gel prepared by electrodeposition of silica sol from sodium silicate
- Shabrina – Eka: Hydrophobic coating of Cu by electrophoretic deposition of nanosilica for corrosion protection