DataVXACS Materials LettersPaper
journal article·2026-07-06Open access

Understanding and Taking Advantage of Carbon Quantum Dot-UiO-66-(OH) 2 Composite-Enhanced Photoluminescence and Electrical Conductivity for Sulfur Dioxide and Sulfamethoxazole Sensing

Marco L. Martínez, Gabriella Iula, Ada Raucci, Ariel Guzmán-Vargas, Melina Leonel, Khaled Hassanein, Román Cabrera-Sierra, Diego Solis-Ibarra, Patricia Horcajada, Ilich A. Ibarra, Stefano Cinti, Ricardo A. Peralta

ACS Materials Letters· Volume 8· Issue 7
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Abstract

High Resolution Image Download MS PowerPoint Slide We present a systematic study of the electronic effect of incorporating carbon quantum dot (CQD) nanomaterials within UiO-66-(OH) 2 . The composite material, entitled CQD-UiO-66-(OH) 2, exhibits remarkable improved fluorescence and electrical conductivity because of type I heterojunction band alignment, i.e., charge transfer from carbon quantum dots to UiO-66-(OH) 2 . Therefore, due to enhanced electronic properties, we evaluated CQD-UiO-66-(OH) 2 as a probe for sensing sulfur dioxide and sulfamethoxazole. Specifically, for SO 2 sensing using fluorescence spectroscopy, CQD-UiO-66-(OH) 2 shows 1605 times higher sensitivity than UiO-66-(OH) 2 and a lower limit of detection, i.e., from 330 to 14.2 ppm, for UiO-66-(OH) 2 and CQD-UiO-66-(OH) 2, respectively. Furthermore, SO 2 gas detection is also improved. For sulfamethoxazole (SMX), the engineering of a screen-printed electrode (SPE) with CQD-UiO-66-(OH) 2 allows to reach a detection limit down to 600 nM with a linearity up to 50 μM. Finally, the CQD-UiO-66-(OH) 2 -engineered SPE was tested in real wastewater samples, yielding satisfactory recoveries in the range of 87–118%.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsComposites

OpenAlex topics: Carbon and Quantum Dots Applications · Electrochemical sensors and biosensors · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Del Coyoacán, México D.F. 04510, Mexico

Laboratorio de Investigación en Materiales Porosos, Catálisis Ambiental y Química Fina, Instituto Politécnico Nacional, ESIQIE-SEPI-DIQI, UPALM Edif. 7 P.B. Zacatenco, GAM, CDMX 07738, Mexico

Department of Pharmacy, University of Naples Federico II, Via D. Montesano 49, Naples 80131, Italy

Scuola Superiore Meridionale

University of Naples Federico II

Department of Breast and Thoracic Oncology

Istituto Nazionale Tumori IRCCS Fondazione G. Pascale

Unidad Profesional Interdisciplinaria de Biotecnología

Instituto Politécnico Nacional

Advanced Porous Materials Unit (APMU), IMDEA Energy Institute, Avda. Ramón de la Sagra 3, Móstoles, Madrid E-28935, Spain

Escuela Superior de Ingeniería Química e Industrias Extractivas

Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology

Temple University

Departamento de Química, División de Ciencias Básicas e Ingeniería

Universidad Autónoma Metropolitana-Iztapalapa

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