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Fa\u00e7ades with self-cleaning properties are important in the modern construction industry and the conservation of historic buildings, as they reduce costs and allow the preservation of original surfaces without the need for invasive interventions that could compromise cultural heritage. This study does a comparative analysis of the application of photocatalytic coatings composed of aqueous dispersions of titanium dioxide nanoparticles (TiO\u2082) and zinc oxide microparticles (ZnO) on cementitious substrates for use on fa\u00e7ades by two functionalisation methods: spray coating and dip coating. A comprehensive characterisation was carried out using techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and diffuse reflectance spectroscopy (DRS) to assess the morphology, crystal structure and light absorption properties of the photocatalyst particles while Energy Dispersive Spectroscopy (EDS) and scanning electron microscopy (SEM) were employed to evaluate the substrate. The self-cleaning performance was evaluated by monitoring the degradation of Rhodamine B (RhB) dye under simulated sunlight. Spectrophotometric analysis was used to assess the colour coordinates using a standard colour system (CIELAB colour space). The results showed that the photocatalytic coatings improved the surfaces' self-cleaning properties while maintaining the substrate's original aesthetics. Spray-applied micro-ZnO-based coatings showed the most significant effectiveness in terms of self-cleaning.<\/jats:p>","DOI":"10.1007\/s41024-024-00522-3","type":"journal-article","created":{"date-parts":[[2024,10,25]],"date-time":"2024-10-25T01:09:57Z","timestamp":1729818597000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Application of nano-TiO2 and micro-ZnO on cementitious surfaces for self-cleaning fa\u00e7ades by spray coating and dip coating: A comparative study"],"prefix":"10.1007","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-7453-1183","authenticated-orcid":false,"given":"Fab\u00edula","family":"Pereira Lessa","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5702-006X","authenticated-orcid":false,"given":"Orlando","family":"Lima Jr","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6649-4029","authenticated-orcid":false,"given":"\u00c9lida","family":"Margalho","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0402-1357","authenticated-orcid":false,"given":"Claver","family":"Pinheiro","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4199-5994","authenticated-orcid":false,"given":"Iran","family":"Rocha Segundo","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9778-5390","authenticated-orcid":false,"given":"Joaquim","family":"Oliveira Carneiro","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2024,10,25]]},"reference":[{"key":"522_CR1","doi-asserted-by":"crossref","unstructured":"Sharma S, Dakshina Murthy NR, Sumanth C. 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