Shape tailoring of AgBr microstructures: effect of the cations of different bromide sources and applied surfactants
Open Access
- 9 March 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 11 (16), 9709-9720
- https://doi.org/10.1039/d0ra09144h
Abstract
Investigations regarding AgBr-based photocatalysts came to the center of attention due to their high photosensitivity. The present research focuses on the systematic investigation regarding the effect of different alkali metal cation radii and surfactants/capping agents applied during the synthesis of silver-halides. Their morpho-structural and optical properties were determined via X-ray diffractometry, diffuse reflectance spectroscopy, scanning electron microscopy, infrared spectroscopy, and contact angle measurements. The semiconductors' photocatalytic activities were investigated using methyl orange as the model contaminant under visible light irradiation. The correlation between the photocatalytic activity and the obtained optical and morpho-structural properties was analyzed using generalized linear models. Moreover, since the (photo)stability of Ag-based photoactive materials is a crucial issue, the stability of catalysts was also investigated after the degradation process. It was concluded that (i) the photoactivity of the samples could be fine-tuned using different precursors and surfactants, (ii) the as-obtained AgBr microcrystals were transformed into other Ag-containing composites during/after the degradation, and (iii) elemental bromide did not form during the degradation process. Thus, the proposed mechanisms in the literature (for the degradation of MO using AgBr) must be reconsidered.Funding Information
- Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii (PN-III-P1-1.1-TE-2016-1324, PN-III-P1.1-TE-2016-1588)
- Magyar Tudományos Akadémia (Bolyai Scholarship)
- Nemzeti Kutatási Fejlesztési és Innovációs Hivatal (GINOP-2.3.2-15-2016-00013, PD-125311)
This publication has 65 references indexed in Scilit:
- A scalable synthesis technique of novel AgBr microcrystal and its visible light photocatalytic performanceMaterials Letters, 2012
- Polyhedral AgBr Microcrystals with an Increased Percentage of Exposed {111} Facets as a Highly Efficient Visible‐Light PhotocatalystChemistry – A European Journal, 2012
- Facile Subsequently Light-Induced Route to Highly Efficient and Stable Sunlight-Driven Ag−AgBr Plasmonic PhotocatalystLangmuir, 2010
- In situ synthesis of ZnO nanostructures on a zinc substrate assisted with mixed cationic/anionic surfactantsJournal of Alloys and Compounds, 2009
- Highly Efficient Visible‐Light Plasmonic Photocatalyst Ag@AgBrChemistry – A European Journal, 2009
- A Systematical Study on Photocatalytic Properties of AgMO2 (M = Al, Ga, In): Effects of Chemical Compositions, Crystal Structures, and Electronic StructuresThe Journal of Physical Chemistry C, 2009
- Structural properties of silver nanoclusters–phosphate glass compositesVibrational Spectroscopy, 2007
- Anionic surfactant-assisted hydrothermal synthesis of high-aspect-ratio ZnO nanowires and their photoluminescence propertyMaterials Letters, 2006
- The band structures of the silver halides AgF, AgCl, and AgBr: A comparative studyPhotochemical & Photobiological Sciences, 2003
- The Scherrer Formula for X-Ray Particle Size DeterminationPhysical Review B, 1939