Subhan Md Abdus, Chandra Saha Pallab, Sumon Shamim Ahmed, Ahmed Jahir, Asiri Abdullah M, Rahman Mohammed M, Al-Mamun Mohammad
Department of Chemistry, School of Physical Sciences, Shahjalal University of Science and Technology Sylhet-3100 Bangladesh
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
RSC Adv. 2018 Sep 24;8(58):33048-33058. doi: 10.1039/c8ra05182h.
The synthesis of a ternary SnO·ZnO·TiO 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·ZnO·TiO 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·ZnO·TiO 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·ZnO·TiO/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 cm and an exceptionally low detection limit (LOD) of 3.2 ± 0.1 pM (S/N = 3). Hence, a chemical sensor modified with SnO·ZnO·TiO/GCE may be a promising sensor in the determination of toxic chemicals in the environmental and healthcare fields.
报道了通过简单的共沉淀法合成三元SnO·ZnO·TiO纳米材料（NM）及其作为高效光催化剂和化学传感器的潜在应用。通过XRD、SEM、EDS、XPS、FTIR、AFM和光致发光研究对合成的纳米材料进行了全面表征。该纳米材料在光催化降解甲基紫6b（MV）染料方面表现出更高的效率。在pH 9的紫外光下，观察到SnO·ZnO·TiO纳米材料的光催化效率为100%。此外，经过五次重复使用后，其效率损失约12%。还报道了激发能量变化时的PL特性。采用高效电化学技术用SnO·ZnO·TiO纳米材料修饰玻碳电极（GCE），以开发用于选择性检测苯甲醛的化学传感器。通过选择性研究精心选择了有害的苯甲醛作为目标分析物；在电化学传感中，它对SnO·ZnO·TiO/Nafion/GCE传感器探头显示出快速响应。它还具有出色的灵敏度、超低的检测限、长期稳定性以及非常好的重复性和再现性。在本研究中，获得了0.1 nM至1.0 mM苯甲醛水溶液的线性校准曲线，灵敏度值为4.35 nA μM cm，检测限（LOD）极低，为3.2±0.1 pM（S/N = 3）。因此，用SnO·ZnO·TiO/GCE修饰的化学传感器可能是环境和医疗领域中测定有毒化学物质的一种有前景的传感器。
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