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Browsing by Author Loan Le Thi Ngoc

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    • TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysis
    Authors: Thanh-Hiep Thi Le; Thanh-Trang Bui; Hao Van Bui; Van-Duong Dao; Loan Le Thi Ngoc;  Advisor: -;  Co-Author: - (2021)

    This work reports on the synthesis, characterization, and photocatalytic performance of the TiO2 inverse opal nanostructure (IP-TiO2) and the IP-TiO2 modified by Ag nanoparticles (Ag@IP-TiO2). The IP-TiO2 is fabricated using polystyrene spheres as the template and TiCl4 as the precursor, and the Ag@IP-TiO2 is realized by photoreduction method. The morphological, structural, and optical properties of the materials are investigated by scanning electron microscopy, X-ray diffraction, ultraviolet–visible (UV-VIS) absorption spectroscopy, and photoluminescence spectroscopy. Their photocatalytic performances are studied by the degradation of rifampicin antibiotic under the visible-light irr...
    • Titanium Nitride Nanodonuts Synthesized from Natural Ilmenite Ore as a Novel and Efficient Thermoplasmonic Material
    Authors: Thanh-Lieu Thi Le; Lam Tan Nguyen; Hoai-Hue Nguyen; Nguyen Van Nghia; Nguyen Minh Vuong; Hoang Nhat Hieu; Nguyen Van Thang; Viet Thong Le; Viet Huong Nguyen; Pin-Cheng Lin; Anupam Yadav; Ivan Madarevic; Ewald Janssens; Hao Van Bui; Loan Le Thi Ngoc;  Advisor: -;  Co-Author: - (2021)

    Nanostructures of titanium nitride (TiN) have recently been considered as a new class of plasmonic materials that have been utilized in many solar energy applications. This work presents the synthesis of a novel nanostructure of TiN that has a nanodonut shape from natural ilmenite ore using a low-cost and bulk method. The TiN nanodonuts exhibit strong and spectrally broad localized surface plasmon resonance absorption in the visible region centered at 560 nm, which is well suited for thermoplasmonic applications as a nanoscale heat source. The heat generation is investigated by water evaporation experiments under simulated solar light, demonstrating excellent solar light harvesting pe...