Enhanced photocatalytic activity and ultra-sensitive benzaldehyde sensing performance of a SnO 2 ·ZnO·TiO 2 nanomaterial.

Autor: Subhan MA; Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology Sylhet-3100 Bangladesh subhan-che@sust.edu +8801716073270., Chandra Saha P; Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology Sylhet-3100 Bangladesh subhan-che@sust.edu +8801716073270., Sumon SA; Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology Sylhet-3100 Bangladesh subhan-che@sust.edu +8801716073270., Ahmed J; Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology Sylhet-3100 Bangladesh subhan-che@sust.edu +8801716073270., Asiri AM; Center of Excellence for Advanced Materials Research (CEAMR), Department of Chemistry, Faculty of Science, King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia mmrahman@kau.edu.sa +966-12-695-2292 +966-59-642-1830., Rahman MM; Center of Excellence for Advanced Materials Research (CEAMR), Department of Chemistry, Faculty of Science, King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia mmrahman@kau.edu.sa +966-12-695-2292 +966-59-642-1830., Al-Mamun M; Centre for Clean Environment and Energy, Griffith School of Environment, Gold Coast Campus, Griffith University QLD 4222 Australia.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2018 Sep 24; Vol. 8 (58), pp. 33048-33058. Date of Electronic Publication: 2018 Sep 24 (Print Publication: 2018).
DOI: 10.1039/c8ra05182h
Abstrakt: The synthesis of a ternary SnO 2 ·ZnO·TiO 2 nanomaterial (NM) by a simple co-precipitation method and its potential applications as an efficient photocatalyst and chemical sensor have been reported. The synthesized nanomaterial was fully characterized by XRD, SEM, EDS, XPS, FTIR, AFM and photoluminescence studies. This nanomaterial exhibited enhanced efficiency in photo-catalysis of Methyl Violet 6b (MV) dye degradation. The observed photocatalyst efficiency of the SnO 2 ·ZnO·TiO 2 nanomaterial was 100% under UV light at pH 9. Moreover, it lost around 12% efficiency over five reuses. The PL properties with changing excitation energy were also reported. Glassy carbon electrode (GCE) was modified with the SnO 2 ·ZnO·TiO 2 nanomaterial by an efficient electrochemical technique to develop a chemical sensor for selective benzaldehyde. Hazardous benzaldehyde was carefully chosen as a target analyte by a selectivity study; it displays a rapid response towards the SnO 2 ·ZnO·TiO 2 /Nafion/GCE sensor probe in electrochemical sensing. It also shows superb sensitivity, an ultra-low detection limit, long-term stability, and very good repeatability and reproducibility. In this study, a linear calibration plot was obtained for 0.1 nM to 1.0 mM aqueous benzaldehyde solutions, with a sensitivity value of 4.35 nA μM -1 cm -2 and an exceptionally low detection limit (LOD) of 3.2 ± 0.1 pM (S/N = 3). Hence, a chemical sensor modified with SnO 2 ·ZnO·TiO 2 /GCE may be a promising sensor in the determination of toxic chemicals in the environmental and healthcare fields.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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