Presentation Information
[22p-P01-5]Heavy Metal Detection Using UiO-66-NH2 Modified Gold Surface-based Surface Plasmon Resonance Sensor
〇(D)Wisansaya Jaikeandee1, Chutiparn Lertvachirapaiboon2, Kazunari Shinbo1, Keizo Kato1, Akira Baba1 (1.Niigata Univ., 2.NANOTEC (Thailand))
Keywords:
Metal-organic frameworks,UiO-66-NH2,Surface Plasmon Resonance
Metal-organic frameworks (MOFs), particularly Zr-based UiO-66-NH2, exhibit significant potential in catalytic and adsorption processes to remove heavy metals from wastewater. The distinctive features of UiO-66-NH2, including its large specific surface area, high porosity, abundant active adsorption sites, tunable surface chemistry, and well host-guest interactions, make it particularly effective in targeting copper(II) ions from water, which cause bioaccumulation and human toxicity. Utilizing surface plasmon resonance (SPR) spectroscopy, a simple and rapid protocol for detecting heavy metal can be demonstrated. In this work, the SPR sensing system involves the modification of UiO-66-NH2 on the gold chip through the spin-coating technique, as shown in Fig. 1A. The UiO-66-NH2 provided uniform particle distribution on the gold surface, compared with a bare Au chip, as shown on Fig. 1B and 1C. The SPR reflectivity curve of the modified Au/UiO-66-NH2 (Fig. 1D) displays a wavelength shift of approximately 20.39 nm compared to a bare Au chip at the same incident angle, indicating successful surface modification. Furthermore, the Au/UiO-66-NH2-modified SPR sensing platform exhibits enhanced adsorption of copper(II) ions, achieving a sensitivity more than seven times greater than the bare gold chip (Fig. 1E). This work introduces a novel and efficient approach to heavy metal detection, exhibiting the potential of UiO-66-NH2 in SPR sensing in advancing environmental monitoring and remediation efforts.