Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes

Abstract Background Semiconductor doped nanostructure materials have attained considerable attention owing to their electronic, opto-electronic, para-magnetic, photo-catalysis, electro-chemical, mechanical behaviors and their potential applications in different research areas. Doped nanomaterials might be a promising owing to their high-specific surface-area, low-resistances, high-catalytic activity, attractive electro-chemical and optical properties. Nanomaterials are also scientifically significant transition metal-doped nanostructure materials owing to their extraordinary mechanical, optical, electrical, electronic, thermal, and magnetic characteristics. Recently, it has gained significant interest in manganese oxide doped-semiconductor materials in order to develop their physico-chemical behaviors and extend their efficient applications. It has not only investigated the basic of magnetism, but also has huge potential in scientific features such as magnetic materials, bio- & chemi-sensors, photo-catalysts, and absorbent nanomaterials. Results The chemical sensor also displays the higher-sensitivity, reproducibility, long-term stability, and enhanced electrochemical responses. The calibration plot is linear (r2 = 0.977) over the 0.1 nM to 50.0 μM 4-nitrophenol concentration ranges. The sensitivity and detection limit is ~4.6667 μA cm-2 μM-1 and ~0.83 ± 0.2 nM (at a Signal-to-Noise-Ratio, SNR of 3) respectively. To best of our knowledge, this is the first report for detection of 4-nitrophenol chemical with doped Mn2O3-ZnO NPs using easy and reliable I-V technique in short response time. Conclusions As for the doped nanostructures, NPs are introduced a route to a new generation of toxic chemo-sensors, but a premeditate effort has to be applied for doped Mn2O3-ZnO NPs to be taken comprehensively for large-scale applications, and to achieve higher-potential density with accessible to individual chemo-sensors. In this report, it is also discussed the prospective utilization of Mn2O3-ZnO NPs on the basis of carcinogenic chemical sensing, which could also be applied for the detection of hazardous chemicals in ecological, environmental, and health care fields

Diamond-based nanostructured materials for detection of water contaminants

Sustainability is presently one of the most heard watchwords. Water environment is of great importance to all living beings and climate changes, with cleaning and preservation of our largest natural resource as the number one priority. It can only be attained if environmental conscience is put into practice and, involuntarily or not, the scientific community inherited the additional responsibility to cope with the urgency of this matter. This chapter offers a closer look at diamond-based nanostructured materials for detection of water contaminants. This group of synthetic materials has remarkable electrochemical properties towards sensing and analysis of water pollutants such as heavy metals, pesticides or pharmaceutical compounds. Moreover, doped-diamond thin films provide endless applications as electrodes in environmental monitoring but also as strong tools already being applied in environmental remediation. Diamond-based nanostructured electrodes are suitable for the wide range of electrochemical techniques providing fast, straightforward, sensitive, reproducible and robust means of electroanalysis. The versatility of these electrodes also enables in situ and real time application as sensitive and stable sensors also if being tested for determination of contaminants in complex water matrices.publishe