Size- and density-controlled photodeposition of metallic platinum nanoparticles on titanium dioxide for photocatalytic applications

Camilla Tossi, Lassi Hällström, Jorma Selin, Marko Vaelma, Erich See, Jouko Lahtinen, Ilkka Tittonen

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Photodeposition has been demonstrated to be a reliable tool for the growth of co-catalyst nanoparticles on titanium dioxide. The current state of investigation on the technique, however, lacks a comprehensive study on the collective influence of different process parameters, preferring to confront the effect of a single parameter at a time. This paper presents a parametric study on photodeposition of platinum nanoparticles from liquid precursors on ALD-grown titanium dioxide, applicable to the fabrication of photocatalytic composite materials. In the described process, a systematic and rigorous statistical analysis of the photodeposition parameters is conducted, assessing the influential parameters that control and predict the size, density and loading of the deposited nanoparticles. The results are assessed by scanning electron microscopy, statistical analysis of micrographs, and X-ray photoelectron spectroscopy. This confirms the simplicity and the viability of photodeposition as a method for the self-assembly of metal nanoparticles from liquid precursors and provides all-round insight on the role of parameters such as the concentration of sacrificial reagents, the presence of H 2SO 4, and the concentration of the precursor solution, in the chemical and structural properties of the deposited nanoparticles.

Original languageEnglish
Pages (from-to)14519-14525
Number of pages7
JournalJournal of Materials Chemistry A
Issue number24
Publication statusPublished - 28 Jun 2019
MoE publication typeA1 Journal article-refereed

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  • Projects

    Energy harvesting for ICT from water evaporation

    Tittonen, I., Tossi, C., Hällström, L., Juntunen, T., Vänskä, O., See, E. & Koskinen, T.


    Project: Academy of Finland: Other research funding

    Conversion of light to transport fuels through integrated optoelectronic cell factories

    Tittonen, I., Vänskä, O., Selin, J., Tossi, C., Hällström, L., See, E. & Koskinen, T.


    Project: Academy of Finland: Other research funding



    Anna Rissanen (Manager)

    Aalto University

    Facility/equipment: Facility

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