Co-precipitation Synthesis and Photocatalytic Activity of Mn-doped SrTiO_3 for the Degradation of Methylene Blue Wastewater

Abstract

Wastewater has been one of the major issues concerned by researchers in developing countries such as Indonesia. The wastewater contaminants can be removed by a photocatalytic process using a photocatalyst material, and one famous is Strontium Titanate (SrTiO3 or STO). STO doped with metals, one of which is Manganese (Mn), can improve its photocatalytic activity.Synthesis of Mn-doped STO (SrTi1-xMnxO3, where x=0.05-0.2) has been completed via the coprecipitation method to examine the influences of Mn concentrations on the microstructure, chemical bonds, and photocatalytic activity of STO material. The characterization employed X-Ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR), and UV-Vis spectrophotometer. The data revealed that Mn-doped STO samples had been formed with high crystallinity. The photocatalytic activity of the Mn-doped STO samples was examined with the degradation of 10 ppm methylene blue (MB) under UV irradiation. The yields demonstrated that all samples have successfully become photocatalysts by degrading MB. The degradation was affected by the crystallinity and surface area of the samples. The study found that the best Mn-doped STO resulting in 54.69% MB degradation was from x=0.15 with 5 hours irradiation.

Two-step Heating Effect of Hydrochar-MnO_2 Formation and Their Electrochemical Performances

“…Furthermore, from energy dispersive X-ray analysis (EDX) analysis data, manganese (Mn) is predicted to have a MnO 2 structure in all samples as a result of the reduction of KMnO 4 by lignin from the raw material used 21,22) . The higher MnO 2 content of two-step than one-step hydrochar is a crucial aspect that can enhance the electrocapacitance and electrocatalysis of hydrochar 23) , as explained in the following section.…”

Adsorption Capacity of Mesoporous SBA-15 Particles Synthesized from Corncobs and Rice Husk at Different CTAB/P123 Ratios and Their Application for Dyes Adsorbent

“…Indonesia has an alarming water contamination issue that concerns researchers today. 1) The textile industry is one of those industries that spills wastewater into the water system. Most of the textile industry uses synthetic dyes.…”