00000caa a22000003i 4500 UP-1685594773862388385 Buklod 20210311114729.0 m | | ta 210311s2017 xx r |||| u|eng d (iLib)UPBAG-00039458387 STII-DOST BAG rda eng ARTICLE-2587 Rapadas, Nick Joaquin author. Hydrothermal synthesis of hierarchical hematite (α-Fe2O3) microstructures for photocatalytic degradation of methyl orange by Nick Joaquin Rapadas and Mary Donnabelle L. Balela. 2017. pages 395-402 illustrations 26 cm text rdacontent unmediated rdamedia volume rdacarrier Includes bibliographical references (pages 401-402) Hematite (α-Fe2O3) hierarchical microstructures were prepared by a simple and inexpensive hydrothermal method using a mixture of FeCl3 and Na2SO4 as precursors, followed by annealing at 400°C for 2 h. α-Fe2O3 microspheres with an average diameter of 1.07 µm were formed in the solution. Microrods with an average length of 0.46 µm were also observed on the surface of the microspheres, forming an urchin-like morphology. The amounts of Fe3+ and (SO4)2- in the solution significantly influence the morphology of the α-Fe2O3 urchin-like microstructures. An optimum amount of Fe3+ and (SO4)2- leads to the formation of urchin-like microstructures. The α-Fe2O3 microstructures successfully degraded methyl orange after 1h of UV irradiation in the presence of a minute amount of hydrogen peroxide (H2O2). The α-Fe2O3 microstructures also exhibit excellent reusability and stability making it an ideal photocatalyst for wastewater treatment. (Author's abstract) Engineering. Dye. Hematite. Hierarchical microstructures. Hydrothermal treatment. Photocatalyst. Balela, Mary Donnabelle L. author. The Philippine Journal of Science Vol. 146, no. 4, December 2017. Request full-text access via UPB University Library through https://forms.gle/KZjBv7aRtY6jiL5E9 (viewed 10 March 2021) FI UPBAG UPBAG-MAIN ARTICLE-2587 Analytics