CuO-TiO2–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye

Trigueiro, Pollyana; Albuquerque, Willams A.; Jerônimo, Aimée G.; Rodrigues, Monica Sá; França, Emanoel L. Tavares; Peña-Garcia, Ramón Raudel

doi:10.3390/min14121268

Open AccessArticle

CuO-TiO₂–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye

by

Pollyana Trigueiro

¹

,

Willams A. Albuquerque

¹,

Aimée G. Jerônimo

¹,

Monica Sá Rodrigues

²,

Emanoel L. Tavares França

²

and

Ramón Raudel Peña-Garcia

^1,*

¹

Postgraduate Program in Physical Engineering, Academic Unit of Cabo de Santo Agostinho, Federal Rural University of Pernambuco (UFRPE), Cabo de Santo Agostinho 54.518-430, PE, Brazil

²

Department of Physics, Federal University of Pernambuco, Recife 50740-540, PE, Brazil

^*

Author to whom correspondence should be addressed.

Minerals 2024, 14(12), 1268; https://doi.org/10.3390/min14121268

Submission received: 12 November 2024 / Revised: 10 December 2024 / Accepted: 11 December 2024 / Published: 13 December 2024

(This article belongs to the Section Clays and Engineered Mineral Materials)

Download

Browse Figures

Versions Notes

Abstract

This study presents the synthesis of a CuO-TiO₂–saponite ternary nanocomposite via a hydrothermal method, designed to efficiently remove bromocresol green dye. Characterization techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy, confirmed significant interactions between metal oxide nanoparticles and the clay mineral matrix. Diffuse reflectance and photoluminescence analyses revealed a narrow band gap and surface defects, such as oxygen vacancies, enhancing the material’s photocatalytic properties. Under UV irradiation, the nanocomposite achieved 83% discoloration of bromocresol green dye within 150 min. The inhibitor studies identified hydroxyl and superoxide radicals as key species in the degradation mechanism. This work underscores the potential of clay-mineral-based nanocomposites, where clay minerals function both as structural support and as enhancers of the semiconductor’s photocatalytic activity.

Keywords: saponite; CuO; TiO₂; heterogeneous photocatalysis; environmental research

Share and Cite

MDPI and ACS Style

Trigueiro, P.; Albuquerque, W.A.; Jerônimo, A.G.; Rodrigues, M.S.; França, E.L.T.; Peña-Garcia, R.R. CuO-TiO₂–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye. Minerals 2024, 14, 1268. https://doi.org/10.3390/min14121268

AMA Style

Trigueiro P, Albuquerque WA, Jerônimo AG, Rodrigues MS, França ELT, Peña-Garcia RR. CuO-TiO₂–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye. Minerals. 2024; 14(12):1268. https://doi.org/10.3390/min14121268

Chicago/Turabian Style

Trigueiro, Pollyana, Willams A. Albuquerque, Aimée G. Jerônimo, Monica Sá Rodrigues, Emanoel L. Tavares França, and Ramón Raudel Peña-Garcia. 2024. "CuO-TiO₂–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye" Minerals 14, no. 12: 1268. https://doi.org/10.3390/min14121268

APA Style

Trigueiro, P., Albuquerque, W. A., Jerônimo, A. G., Rodrigues, M. S., França, E. L. T., & Peña-Garcia, R. R. (2024). CuO-TiO₂–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye. Minerals, 14(12), 1268. https://doi.org/10.3390/min14121268

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

CuO-TiO₂–Saponite Ternary Nanocomposite for Efficient Removal of Bromocresol Green Dye

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI