Sintesis Magnesium Oksida (MgO) dari Dolomit Bangkalan dengan Metode Leaching

Abstract

Magnesium oxide (MgO) is a ceramic material that has potential in the medical and industrial fields, where MgO can be obtained from natural dolomite which has a composition of 21.9% MgO and 54.3% CaCO3. However, MgO from dolomite has not been studied much so that this study was conducted with the aim of analyzing the effect of the holding time of calcination on the synthesized MgO phase. The MgO synthesis method uses the Leaching method, which is dissolving dolomite with HCl and stirring it at 75 ° C for 45 minutes. After that, it is filtered where the results of the filtrate are added with ammonia until the solution reaches pH 12 and a precipitate is formed. Furthermore, the precipitate was filtered and dried at 90 ° C for 6 hours, and calcined at a temperature of 800 ° C with a variation of the holding time of 4 hours, 8 hours, 12 hours, 16 hours, and 20 hours. The calcined powder was characterized by XRD and FTIR. The results showed that the optimum MgO main phase was formed at a holding time of 8 hours at a calcination temperature of 800 ° C and had a nanocrystallite size of 20.12 nm. FTIR results show that the MgO synthesized with a holding time of 8 hours has functional groups Mg-O, Mg-O-Mg, C = O, alkene groups, and H-O-H in the wave number range of 4000 cm -1 -500 cm -1 .

Irradiation Time Optimization on Photocatalytic Activity of Nanoparticles MgO from Dolomite Bangkalan

“…The functional groups of the synthesized MgO nanoparticle sample can be identified by carrying out FTIR characterization, where the test is in the wave number range of 4,000 -500 cm −1, the results of which are shown in The FTIR spectrum also detected bonding and interaction of Mg-O at wave numbers 947.04 and 1,494.83 cm −1 , indicating the presence of MgO compounds [22]. At wave number 1,652.99 cm −1 , C = O stretching occurs, indicating the presence of a carbonyl group [21,23]. Weak absorption occurred at 3,438.80 and 2,829.57 cm −1 , which could be associated with OH stretching and bonding.…”

The synthesis of MgO/Zein nanocomposites to improve anti-bacteria characteristics of mouthwash

“…The precipitate was washed with distilled water thrice and dried at 90 °C for 6 hours. Furthermore, calcination was carried out at 800 °C for 8 hours and cooled at room temperature [15].…”

Flavor Characteristics of Crab Boiled Water Powder with the Addition of Magnesium Oxide (MgO) as an Anti-Caking Agent

“…This is related to the presence of anti-clay ingredients that play a role in changing the brightness of the product. According to Saputri and Rohmawati (2021), magnesium oxide (MgO) is a solid mineral that has a white color. Magnesium oxide is nano-sized which has broad potential in the industrial field.…”