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Chemosensors
Special Issues
Chemical Sensors Based on Organic-Inorganic Nanocomposites
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Chemical Sensors Based on Organic-Inorganic Nanocomposites

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Materials for Chemical Sensing".

Deadline for manuscript submissions: closed (31 May 2021) | Viewed by 14344

Special Issue Editor

Dr. Sadanand Pandey

E-Mail Website1 Website2 Website3
Guest Editor
School of Chemistry and Biochemistry, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do, Korea
Interests: nanomaterials; nanosensors; chemical sensor; catalysts; wastewater treatment
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanostructured platforms have been utilized for fabrication of small, sensitive, and reliable gas sensing devices owing to high functionality, enhanced charge transport, and electrocatalytic property. As a result of globalization, rapid, sensitive, and selective detection of gases and chemicals in environment is essential for healthcare and security. Therefore, recently, the synthesis and fabrication of novel organic–inorganic hybrid nanocomposite-based sensing materials has opened up new opportunities for designing reliable and robust chemical sensors with greater sensing properties at room temperature operations. At the same time, theoretical models have helped toward a deeper understanding of sensing properties for their real life applications.

The aim and scope of this Special Issue is to provide a research medium and an important foundation for the advancement and dissemination of research results that support organic–inorganic chemical sensors and research in the fields of science and technology. Such excellent works on organic–inorganic chemical sensors deserve high visibility and their presentation in open access journals, such as Chemosensors, MDPI. Moreover, this issue offers the opportunity to address wider audiences and attract the interest of possible end users.

We invite scientists, academicians, field engineers, scholars and students of the related fields of engineering and technology to participate through the submission of research and review articles covering (but not limited to) the following topics:

  • Synthesis, functionalization, and properties of organic–inorganic hybrid nanocomposite sensors;
  • Gas-sensing principle of organic–inorganic hybrid nanocomposite sensors;
  • Organic–inorganic hybrid nanocomposite-based gas sensors for environmental monitoring (i.e., volatile organic compounds (VOCs), ammonia (NH3), nitrogen oxides (NOx), carbon dioxide (CO2), etc.)
  • Chemiresistive-based organic–inorganic hybrid nanocomposite sensors;
  • Theoretical calculation and simulation on sensing nanomaterials/sensors;
  • Challenges and future prospects.

Dr. Sadanand Pandey
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Chemosensors is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Organic–inorganic hybrid nanocomposites
  • Chemical sensors
  • Environmental monitoring
  • Sensitivity
  • Surface chemistry
  • Selectivity
  • Carbon quantum dots
  • Conducting polymers
  • Metal organic framework

Published Papers (4 papers)

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Research

14 pages, 2923 KiB  
Article
Electrochemical Determination of Lead & Copper Ions Using Thiolated Calix[4]arene-Modified Screen-Printed Carbon Electrode
by Chong Jin Mei, Nor Azah Yusof and Shahrul Ainliah Alang Ahmad
Chemosensors 2021, 9(7), 157; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors9070157 - 25 Jun 2021
Cited by 20 | Viewed by 3280
Abstract
This study used a thiolated calix[4]arene derivative modified on gold nanoparticles and a screen-printed carbon electrode (TC4/AuNPs/SPCE) for Pb2+ and Cu2+ determination. The surface of the modified electrode was characterised via Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), [...] Read more.
This study used a thiolated calix[4]arene derivative modified on gold nanoparticles and a screen-printed carbon electrode (TC4/AuNPs/SPCE) for Pb2+ and Cu2+ determination. The surface of the modified electrode was characterised via Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Differential pulse voltammetry (DPV) was used for the detection of Pb2+ and Cu2+ under optimum conditions. The limit of detection (LOD) for detecting Pb2+ and Cu2+ was 0.7982 × 10−2 ppm and 1.3358 × 10−2 ppm, respectively. Except for Zn2+ and Hg2+, the presence of competitive ions caused little effect on the current response when detecting Pb2+. However, all competitive ions caused a significant drop in the current response when detecting Cu2+, except Ca2+ and Mg2+, suggesting the sensing platform is more selective toward Pb2+ ions rather than copper (Cu2+) ions. The electrochemical sensor demonstrated good reproducibility and excellent stability with a low relative standard deviation (RSD) value in detecting lead and copper ions. Most importantly, the result obtained in the analysis of Pb2+ and Cu2+ had good recovery in river water, demonstrating the applicability of the developed sensor for real samples. Full article
(This article belongs to the Special Issue Chemical Sensors Based on Organic-Inorganic Nanocomposites)
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13 pages, 4468 KiB  
Article
A High-Response Electrochemical As(III) Sensor Using Fe3O4–rGO Nanocomposite Materials
by Haibing Hu, Wenjie Lu, Xingnan Liu, Fancheng Meng and Jianxiong Zhu
Chemosensors 2021, 9(6), 150; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors9060150 - 18 Jun 2021
Cited by 22 | Viewed by 2973
Abstract
Nowadays, heavy metal ion pollution in water is becoming more and more common, especially arsenic, which seriously threatens human health. In this work, we used Fe3O4–rGO nanocomposites to modify a glassy carbon electrode and selected square wave voltametric electrochemical [...] Read more.
Nowadays, heavy metal ion pollution in water is becoming more and more common, especially arsenic, which seriously threatens human health. In this work, we used Fe3O4–rGO nanocomposites to modify a glassy carbon electrode and selected square wave voltametric electrochemical detection methods to detect trace amounts of arsenic in water. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) showed that Fe3O4 nanoparticles were uniformly distributed on the rGO sheet, with a particle size of about 20 nm. Raman spectroscopy and electrochemical impedance spectroscopy (EIS) showed that rGO provides higher sensitivity and conductive substrates. Under optimized experimental conditions, Fe3O4–rGO-modified glassy carbon electrodes showed a higher sensitivity (2.15 µA/ppb) and lower limit of detection (1.19 ppb) for arsenic. They also showed good selectivity, stability, and repeatability. Full article
(This article belongs to the Special Issue Chemical Sensors Based on Organic-Inorganic Nanocomposites)
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14 pages, 2799 KiB  
Communication
Manganese-Doped Zinc Oxide Nanostructures as Potential Scaffold for Photocatalytic and Fluorescence Sensing Applications
by Deepika Thakur, Anshu Sharma, Abhishek Awasthi, Dharmender Singh Rana, Dilbag Singh, Sadanand Pandey and Sourbh Thakur
Chemosensors 2020, 8(4), 120; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors8040120 - 29 Nov 2020
Cited by 39 | Viewed by 3886
Abstract
Herein, we report the photocatalytic and fluorescence sensing applications of manganese-doped zinc oxide nanostructures synthesized by a solution combustion technique, using zinc nitrate as an oxidizer and urea as a fuel. The synthesized Mn-doped ZnO nanostructures have been analyzed in terms of their [...] Read more.
Herein, we report the photocatalytic and fluorescence sensing applications of manganese-doped zinc oxide nanostructures synthesized by a solution combustion technique, using zinc nitrate as an oxidizer and urea as a fuel. The synthesized Mn-doped ZnO nanostructures have been analyzed in terms of their surface morphology, phase composition, elemental analysis, and optical properties with the help of scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and UV-Visible (UV-Vis) spectroscopy. A careful observation of the SEM micrograph reveals that the synthesized material was porous and grown in very high density. Due to a well-defined porous structure, the Mn-doped ZnO nanostructures can be used for the detection of ciprofloxacin, which was found to exhibit a significantly low limit of detection (LOD) value i.e., 10.05 µM. The synthesized Mn-doped ZnO nanostructures have been further analyzed for interfering studies, which reveals that the synthesized sensor material possesses very good selectivity toward ciprofloxacin, as it detects selectively even in the presence of other molecules. The synthesized Mn-doped ZnO nanostructures have been further analyzed for the photodegradation of methyl orange (MO) dye. The experimental results reveal that Mn-doped ZnO behaves as an efficient photocatalyst. The 85% degradation of MO has been achieved in 75 min using 0.15 g of Mn-doped ZnO nanostructures. The observed results clearly confirmed that the synthesized Mn-dopedZnO nanostructures are a potential scaffold for the fabrication of sensitive and robust chemical sensors as well as an efficient photocatalyst. Full article
(This article belongs to the Special Issue Chemical Sensors Based on Organic-Inorganic Nanocomposites)
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14 pages, 3646 KiB  
Article
Fumed SiO2-H2SO4-PVA Gel Electrolyte CO Electrochemical Gas Sensor
by Yuhang Zhang, Dongliang Cheng, Zicheng Wu, Feihu Li, Fang Fang and Zili Zhan
Chemosensors 2020, 8(4), 109; https://0-doi-org.brum.beds.ac.uk/10.3390/chemosensors8040109 - 03 Nov 2020
Cited by 10 | Viewed by 3138
Abstract
The conventional CO electrochemical gas sensor uses aqueous H2SO4 solution as electrolyte, with inevitable problems, such as the drying and leakage of electrolyte. Thus, research on new alternative electrolytes is an attractive field in electrochemical gas sensors. In this paper, [...] Read more.
The conventional CO electrochemical gas sensor uses aqueous H2SO4 solution as electrolyte, with inevitable problems, such as the drying and leakage of electrolyte. Thus, research on new alternative electrolytes is an attractive field in electrochemical gas sensors. In this paper, the application of a new fumed SiO2 gel electrolyte was studied in electrochemical gas sensors. The effects of fumed SiO2 and H2SO4 contents on the performance of the CO gas sensor were investigated. The results showed that the optimized composition of the SiO2 gel electrolyte was 4.8% SiO2, 38% H2SO4, and 0.005% polyvinyl alcohol (PVA). Compared with aqueous H2SO4, the gel electrolyte had better water retention ability. The signal current of the sensor was proportional to the CO concentration. The sensitivity to CO was 78.6 nA/ppm, and the response and recovery times were 31 and 38 s, respectively. The detection limit was 2 ppm. The linear range was from 2 to 500 ppm. The gel electrolyte CO sensor possesses equivalent performance to that with aqueous electrolyte. Full article
(This article belongs to the Special Issue Chemical Sensors Based on Organic-Inorganic Nanocomposites)
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