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materialsArticleGreen Synthesis of Hexagonal Hematite (-Fe2O3) flakes Working with Pluronic F127-Gelatin Template for Adsorption and Photodegradation of IbuprofenMaria Ulfa 1, , Didik Prasetyoko 2 , Hasliza Bahruji 3 and Reva Edra NugrahaChemistry Education Study Program, Faculty of Teacher Instruction and Education, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta 57126, Indonesia Division of Chemistry, Faculty of Science, Institut Teknologi Sepuluh Nopember, Keputih, Sukolilo, Surabaya 60111, Indonesia; [email protected] Centre of Advanced Material and Energy Sciences, University Brunei Darussalam, Jalan Tungku Hyperlink, Gadong, Bandar Seri Begawan BE1410, Brunei; [email protected] Department of Chemical Engineering, Faculty of Engineering, Universitas Pembangunan Nasional “Veteran” Jawa Timur, Surabaya 60294, Indonesia; [email protected] Correspondence: [email protected]: Ulfa, M.; Prasetyoko, D.; Bahruji, H.; Nugraha, R.E. Green Synthesis of Hexagonal Hematite (-Fe2 O3 ) Flakes Applying Pluronic F127-Gelatin Template for Adsorption and Photodegradation of Ibuprofen. Materials 2021, 14, 6779. https://doi.org/10.3390/ma14226779 Academic Editor: John T. Kiwi Received: 5 October 2021 Accepted: five November 2021 Published: ten NovemberAbstract: Hematite (-Fe2 O3 ) with uniform hexagonal flake morphology has been effectively synthesized using a combination of gelatin as natural template with F127 by means of hydrothermal method. The resulting hematite was investigated as adsorbent and photocatalyst for removal of ibuprofen as pharmaceutical waste. Hexagonal flake-like hematite was obtained following calcination at 500 C using the typical size was measured at 1 . Increasing the calcination temperature to 700 C transformed the uniform hexagonal structure into cubic shape morphology. Hematite also showed high thermal stability with rising the calcination temperatures; even so, the surface location was lowered from 47 m2 /g to 9 m2 /g. FTIR evaluation additional confirmed the formation Fe-O-Fe bonds, as well as the principal constituent elements of Fe and O were observed in EDX analysis for all samples. -Fe2 O3 AS-0141 supplier samples have an average adsorption capacity of 555.five mg/g at 122 of removal efficiency when applied as adsorbent for ibuprofen. The adsorption capacity was lowered because the calcination temperatures increased because of the reduction of accessible surface location on the hexagonal flakes soon after transforming into cubes. Photocatalytic degradation of ibuprofen applying hematite flakes accomplished 50 removal efficiency; meanwhile, mixture of adsorption and photocatalytic degradation additional removed 80 of ibuprofen in water/hexane mixtures. Keywords: -Fe2 O3 ; hematite; gelatin; F-127; hexagonal-flake; adsorption; ibuprofenPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.1. Introduction Hematite has been extensively investigated as adsorbent for removal of dye, pharmaceutical compound, heavy metal, and industrial waste [1]. Hematite can also be known as -Fe2 O3 , which is just about the most thermodynamically stable types of iron oxide as a result of the powerful interaction PF-06873600 Biological Activity amongst the electrons [5]. Hematite structure resembles corundum, in which the Fe3 cations are connected towards the octahedral oxygen by way of the covalent bonds within a hexagonal closed packing crystal program [4]. Hematite was reported to possess higher adsorption functionality and stability, and to become straightforward and affordable to synthesi.