Molekular ‘imprinting’ nanopartikel oksida ferum hematit (α-Fe2O3) telah dihasilkan melalui kaedah hidroterma. Sintesis ini dilakukan dengan menggunakan ‘Ferri Klorida Kontang’ (FeCl3.6H2O) dan Ammonium Hidroksida (NH3.H2O) sebagai bahan reaktan dan metilena biru sebagai agen struktur penerus. Pengaruh perbezaan suhu tindakbalas dan kehadiran agen struktur penerus terhadap darjah pengkristalan, morfologi, mikrostruktur dan kumpulan berfungsi permukaan sampel α-Fe2O3 telah dikaji dan dianalisis dengan menggunakan Pembelauan Sinar-X (XRD), Mikroskop Elektron Imbasan (SEM), Luas Permukaan (Brunauer-Emmett-Teller) dan Spektrofotometer Inframerah Jelmaan Fourier (FTIR). Berdasarkan hasil pencirian XRD and FTIR, didapati suhu tindakbalas yang tinggi telah menggalakkan pembentukan kristal dan morfologi nanopartikel α-Fe2O3. Aktiviti fotokatalisis bagi α-Fe2O3 ke atas degradasi pewarna metilena biru (MB) dihitung menggunakan spektrofotometer UV-VIS. Aktiviti fotokatalisis α-Fe2O3 yang tertinggi diperoleh pada 160˚ tanpa agen struktur penerus (Fe2O3-WSDA) dengan peratus penyingkiran metilena biru sebanyak 14.22%.
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Molecularly imprinted hematite (α-Fe2O3) nanoparticles were synthesized by hydrothermal preparation method. The synthesis was carried out by using iron chloride (FeCl3.6H2O) and ammonium hydroxide (NH3.H2O) as the reactants and methylene blue as a structure-directing agent. The influence of reaction temperature and the presence of the structure-directing agent on the degree of crystallinity, morphology, microstructure and surface functional groups of the α-Fe2O3 samples were studies and analysed by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area and Fourier transform infrared spectrophotometer (FTIR). From XRD and FTIR results, it was found that the reaction temperature increases the formation of crystalline phase and morphology of the α-Fe2O3 nanoparticles. Photocatalytic activity of α-Fe2O3 on degradation of methylene blue (MB) was measured under UV-VIS spectrophotometer. The photocatalytic activity of α-Fe2O3 is the highest when α-Fe2O3 synthesized at 160˚C without structure directing agent (Fe2O3-WSDA) was used with MB removal percentage of 14.22 %.
Degradation of methylene blue using molecularly imprinted iron (iii) oxide prepared via hydrothermal method / Ong Hoay Yee