Impact of the polydispersion of TiO2 materials on their particle size calculated from specific surface area results obtained during an interlaboratory comparison exercise

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2025-01-17 DOI:10.1016/j.partic.2025.01.002

Sébastien Bau , Sébastien Artous , Sébastien Jacquinot , Dominique Locatelli , Jean-François Hochepied , Nicolas Feltin , Carine Chivas-Joly

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Abstract

In this work, four samples of TiO₂ powder materials with different structures (rutile, anatase), surface coatings and morphologies (rod, pseudo-spherical) were characterized by four partners involving complementary methods. With the aim of producing inter-laboratory reproducibility data, the specific surface-area, bulk density, and number size distribution were measured, yielding a satisfying agreement between partners. The equivalent diameter of constituent particles was determined from the sample volume specific surface area (VSSA) – accounting for polydispersion – and compared to electron microscopy (EM). Constituent particle diameters ranged from 15 to 225 nm according to EM analyses. The relative discrepancies between VSSA-based and EM-based diameters were found within ±20%. Out of the four samples under study, TiO₂ μ-rutile leads to a larger deviation, which was attributed to surface coating thanks to complementary analysis. Assuming that the sample is pure, an equivalent diameter based on the VSSA can be determined, provided that the shape of constituent particles is known or supposed.

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.