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David HU

Expertise

  • Plasmonic nanoparticles : Synthesis & characterization
  • Upconversion nanoparticles : Synthesis & characterization
  • Metal oxide nanoparticles  : Synthesis & characterization
  • Silica coatings
  • Metal oxide coatings
  • Photocatalysis

 

Characterization techniques

UV-Vis and photoluminescence spectroscopies, DLS and Zêta potential, XRD, TEM and SEM, IR (FT-IR, DRIFT), Raman 

 

PhD subject

Development of Near-Infrared Mediated Photocatalytic Nanocomposites for the Treatment of Turbid Wastewaters

Summary

Turbid wastewaters are highly contaminated by organic pollutants, such as polycyclic aromatic hydrocarbons (PAHs), that are very toxic and carcinogen. Conventional photocatalysis, based on UV radiation, is fairly inefficient to degrade them because of the low penetration depth of the UV light in turbid wastewater highly loaded with organic molecules. On the other hand, near-infrared light penetrates much deeper into turbid media.

The aim of this work is to synthesize innovative photocatalytic nanocomposites combining upconversion particles (UCNP, particles that can transform NIR radiation into UV radiation) with a ZnO photocatalyst. This will take advantage of the high penetration depth of NIR light in turbid media to overcome the limited penetration of UV, by NIR-mediated in-situ UV generation.

We expect that this approach, based on a comprehensive study of the mechanisms at each step of the elaboration, followed by testing of the photocatalytic activity on model molecules and later on real wastewater sample, will lead to a more efficient and cost-effective system for wastewater treatment and will create significant impact in the water industry.

  
TEM image of upconversion nanoparticles

 

Teaching activity

  • MU5CI014: “Biomimetic and Biotechnology”
  • MU4CI703: “Matériaux, Surfaces et Interfaces”
  • LU2CI015: “Techniques analytiques”
  • LU1CI002: “Transformations chimiques en solution aqueuse”

Contact Informations

Mail(s) : david.hu@upmc.fr

Function and attachment

PhD. Candidate

27/11/19

Traductions :
      • Or-Nano You-Tube conferences

        A compact 20 min Conference on the couple Antibody/Gold Nanoparticles in the framework of "les conférences digitales Or-Nano", Nice exercice!
        Thanks to the Gdr Or-Nano for the invitation and the sharing ;)
        Below the abstract and the link to the conference
        https://youtu.be/3gGCOopVasc

        http://or-nano.insp.upmc.fr/conference-digitale-2020.html?L=692

      • Literature review in Biosensors & Bioelectronics on AuNP-Ab Bioconjugates

        How to attach an antibody to AuNP? What strategies and what efficiency? How many Ab can one AuNP accomodate?
        Find some answers to these questions in our literature Review just accepted in Biosensors & Biolectronics tackling Antibody-Gold nanoparticle Bioconjugates for Biosensors applications

      • Webinar at the Tunisian Chemical Society

        Facing the confinement during COVID19 pandemic crisis most conferences switched to webinar, below a link to watch the invited conference on plasmonic nanoparticles for optical Biosensing (in French!)
        http://www.sctunisie.org/webinar20/
        https://drive.google.com/file/d/11j7yK7Dh1vtxIhctmiZ4xGvLliurfBa5/view