Mine fire is a very common and serious problem in mining engineering, and often causes casualties, equipment losses, mine shutdown, resource destruction, and even sulphide dust explosion. So it is of vital importance to monitor mine fire in the engineering projects in order to prevent economic losses and casualties. Actually, we have done a lot of engineering projects on mine fire monitoring and have seen a variety of monitoring systems in underground metal mines. Unmodestly speaking, we are experts in this field, therefore, in this viewpoint paper, we mainly introduce a few mine fire monitoring methods and technologies according to our practical engineering experience, especially the ZigBee WSN technology and sensors. And in the end of the paper, we have explained “Why is ZigBee WSN technology the best choice in the fire monitoring in the underground metal mines at the present stage?”.
{"title":"Mine Fire Safety Monitoring in Underground Metal Mines: Is Zigbee Wireless Sensor Networks Technology the Best Choice?","authors":"Haoxuan Yu","doi":"10.1166/sl.2020.4301","DOIUrl":"https://doi.org/10.1166/sl.2020.4301","url":null,"abstract":"Mine fire is a very common and serious problem in mining engineering, and often causes casualties, equipment losses, mine shutdown, resource destruction, and even sulphide dust explosion. So it is of vital importance to monitor mine fire in the engineering projects in order to prevent\u0000 economic losses and casualties. Actually, we have done a lot of engineering projects on mine fire monitoring and have seen a variety of monitoring systems in underground metal mines. Unmodestly speaking, we are experts in this field, therefore, in this viewpoint paper, we mainly introduce\u0000 a few mine fire monitoring methods and technologies according to our practical engineering experience, especially the ZigBee WSN technology and sensors. And in the end of the paper, we have explained “Why is ZigBee WSN technology the best choice in the fire monitoring in the underground\u0000 metal mines at the present stage?”.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84253959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This research evaluates the impact of mass loading/perturbations on the characteristics of a micro-size cantilever bio-mass sensor. Design techniques are proposed through the application of the commercial, finite element modelling, and simulation package, i.e., COMSOL multiphysics. A finite element model and resulting simulations are provided for both the static and dynamic operation of a bio-mass sensor. In static mode, the obtained result provides the structural stress, strain, and displacement of a sensor against several mass loading conditions (point, edge, and boundary). In dynamic mode, shifts in the resonant frequencies of the sensor as a function of mass loading are obtained, which is another viable output of the biosensor. The proposed design and modelling techniques offer a guide in the rapid design and development of precise and efficient biomedical instrumentations and/or products.
{"title":"Precise Design of Micro-Cantilever Sensor for Biomedical Application","authors":"V. Pachkawade","doi":"10.1166/sl.2020.4305","DOIUrl":"https://doi.org/10.1166/sl.2020.4305","url":null,"abstract":"This research evaluates the impact of mass loading/perturbations on the characteristics of a micro-size cantilever bio-mass sensor. Design techniques are proposed through the application of the commercial, finite element modelling, and simulation package, i.e., COMSOL multiphysics.\u0000 A finite element model and resulting simulations are provided for both the static and dynamic operation of a bio-mass sensor. In static mode, the obtained result provides the structural stress, strain, and displacement of a sensor against several mass loading conditions (point, edge, and boundary).\u0000 In dynamic mode, shifts in the resonant frequencies of the sensor as a function of mass loading are obtained, which is another viable output of the biosensor. The proposed design and modelling techniques offer a guide in the rapid design and development of precise and efficient biomedical\u0000 instrumentations and/or products.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84253849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Photocatalysis is viewed as perhaps the best-progressed treatment measures in eliminating numerous dangerous natural toxins from wastewater. It enjoys numerous benefits, however some downsides are: (i) Fast photogenerated electron–hole recombination productivity, (ii) they restricted noticeable light reaction capacity, (iii) low specific surface region, and (iv) the expense of reagents utilization. To improve the economy of the process, it is likewise needed to expand the catalyst’s effectiveness. Consequently, there is an extraordinary requirement for the improvement of elite catalysts. This mini-review survey addresses the basics and uses of photocatalytic materials on metal tungstate-based nanocomposites. The mini-review shows how metal tungstate-based nanocom-posites can help take care of ecological issues. This mini-review also expected survey gives outlines, synthesis, characterizations, and exploration discoveries in the field of metal tungstate-based nanocomposites for photocatalytic applications in the future examination.
{"title":"Metal Tungstate Based Nanocomposites for Environmental Applications: Photocatalysis Mini-Review","authors":"M. Mohamed","doi":"10.1166/sl.2020.4306","DOIUrl":"https://doi.org/10.1166/sl.2020.4306","url":null,"abstract":"Photocatalysis is viewed as perhaps the best-progressed treatment measures in eliminating numerous dangerous natural toxins from wastewater. It enjoys numerous benefits, however some downsides are: (i) Fast photogenerated electron–hole recombination productivity, (ii) they restricted\u0000 noticeable light reaction capacity, (iii) low specific surface region, and (iv) the expense of reagents utilization. To improve the economy of the process, it is likewise needed to expand the catalyst’s effectiveness. Consequently, there is an extraordinary requirement for the improvement\u0000 of elite catalysts. This mini-review survey addresses the basics and uses of photocatalytic materials on metal tungstate-based nanocomposites. The mini-review shows how metal tungstate-based nanocom-posites can help take care of ecological issues. This mini-review also expected survey gives\u0000 outlines, synthesis, characterizations, and exploration discoveries in the field of metal tungstate-based nanocomposites for photocatalytic applications in the future examination.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87252332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The advancements in magnetic nanoparticle mediated hyperthermia give so many optimistic and fruitful results that make it a promising and complementary approach for the existing treatment modalities of cancer. This thermotherapy is gaining wide acceptance among the medical community compared to the conventional treatment methods. The former provides a local heat generation in the malignant tumor cells and remains non-invasive to the adjacent healthy cells. The increased heating efficiency of magnetic nanoparticles and the control of local therapeutic temperature are the main challenges of hyperthermia. Superparamagnetic Iron Oxide nanoparticles have been intensively studied and dominating in magnetic hyperthermia. Recently many researchers successfully demonstrated high heating efficiency and biocompatibility of a wide variety of magnetic metal nanoparticles and proposed as the most promising alternative for traditional iron oxides, which opens up a new avenue for magnetic metal nanoparticles in magnetic hyperthermia. The review presents the recent advancements that occurred in the field of metal nanoparticle mediated magnetic hyperthermia. The theory underlying heat generation, synthesis methods, biofunctionalization, Specific Absorption Rate studies, challenges and future perspectives of magnetic metal nanoparticles are presented. This will inspire more in-depth research and advance practical applications of metal nanoparticles in magnetic hyperthermia.
{"title":"Recent Insights into the Potential of Magnetic Metal Nanostructures as Magnetic Hyperthermia Agents","authors":"A. R. Aarathy, M. Gopika, S. Pillai","doi":"10.1166/sl.2020.4297","DOIUrl":"https://doi.org/10.1166/sl.2020.4297","url":null,"abstract":"The advancements in magnetic nanoparticle mediated hyperthermia give so many optimistic and fruitful results that make it a promising and complementary approach for the existing treatment modalities of cancer. This thermotherapy is gaining wide acceptance among the medical community\u0000 compared to the conventional treatment methods. The former provides a local heat generation in the malignant tumor cells and remains non-invasive to the adjacent healthy cells. The increased heating efficiency of magnetic nanoparticles and the control of local therapeutic temperature are the\u0000 main challenges of hyperthermia. Superparamagnetic Iron Oxide nanoparticles have been intensively studied and dominating in magnetic hyperthermia. Recently many researchers successfully demonstrated high heating efficiency and biocompatibility of a wide variety of magnetic metal nanoparticles\u0000 and proposed as the most promising alternative for traditional iron oxides, which opens up a new avenue for magnetic metal nanoparticles in magnetic hyperthermia. The review presents the recent advancements that occurred in the field of metal nanoparticle mediated magnetic hyperthermia. The\u0000 theory underlying heat generation, synthesis methods, biofunctionalization, Specific Absorption Rate studies, challenges and future perspectives of magnetic metal nanoparticles are presented. This will inspire more in-depth research and advance practical applications of metal nanoparticles\u0000 in magnetic hyperthermia.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90911546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arjun Satheesh, A. A. Alagiriswamy, S. Devanand, S. Nithiyanantham
Electrospinning of dispersions with higher viscosity and limited flow may be carried out, based on the solvent assisted coaxial technique, where the flow of the core dispersion is supported by a free flowing sheath solvent. In the present work, the sheath solvents used are chloroform, toluene and dimethyl formamide and we discuss the fiber formation of Poly Methyl Methacrylate (PMMA) (dispersion-25 wt%). PMMA dispersed in chloroform is taken as the core solution and the sheath is pure solvent. The In-Situ effect of different sheath solvents in fiber formation at two different tip to collector distances are studied. The fibers formed are subjected to SEM analysis and the characteristics are analysed. The fiber formation of high viscos polymer dispersions makes the same materials subjectable to electrospinning and further applications.
{"title":"Solvent Assisted Coaxial-Electrospun Poly Methyl Methacrylate Polymer and Study of Resultant Fibers","authors":"Arjun Satheesh, A. A. Alagiriswamy, S. Devanand, S. Nithiyanantham","doi":"10.1166/sl.2020.4296","DOIUrl":"https://doi.org/10.1166/sl.2020.4296","url":null,"abstract":"Electrospinning of dispersions with higher viscosity and limited flow may be carried out, based on the solvent assisted coaxial technique, where the flow of the core dispersion is supported by a free flowing sheath solvent. In the present work, the sheath solvents used are chloroform,\u0000 toluene and dimethyl formamide and we discuss the fiber formation of Poly Methyl Methacrylate (PMMA) (dispersion-25 wt%). PMMA dispersed in chloroform is taken as the core solution and the sheath is pure solvent. The In-Situ effect of different sheath solvents in fiber formation at\u0000 two different tip to collector distances are studied. The fibers formed are subjected to SEM analysis and the characteristics are analysed. The fiber formation of high viscos polymer dispersions makes the same materials subjectable to electrospinning and further applications.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81398958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Senthamizhan, K. Sambathkumar, S. Nithiyanantham, A. A. Alagiriswamy
Slow evaporation was used to successfully generate single crystals of pure and La3+ doped L-alanine acetate from aqueous solution. The structural, vibrational, chemical analysis carried out through XRD, UV, FTIR with FTRaman Analysis. The Nd: YAG laser was used to confirm and estimate the sample’s Second Harmonic Generation (SHG). The growing crystal’s laser damage threshold was also discovered. Thermogravimetic (TG) and Differential theromogravimetric (DTA) studies were used to measure the thermal stability of the formed crystal. The generated LAlA crystals were also subjected to dielectric and photoconductivity tests. The dopant has boosted the efficiency of the L-alanine acetate crystal, according to nonlinear optical studies.
{"title":"Electrical, Optical, Structural Properties with Some Physico-Mechanical of Pure and La3+ Doped L-Alanine Acetate Single Crystals","authors":"A. Senthamizhan, K. Sambathkumar, S. Nithiyanantham, A. A. Alagiriswamy","doi":"10.1166/sl.2020.4307","DOIUrl":"https://doi.org/10.1166/sl.2020.4307","url":null,"abstract":"Slow evaporation was used to successfully generate single crystals of pure and La3+ doped L-alanine acetate from aqueous solution. The structural, vibrational, chemical analysis carried out through XRD, UV, FTIR with FTRaman Analysis. The Nd: YAG laser was used to confirm\u0000 and estimate the sample’s Second Harmonic Generation (SHG). The growing crystal’s laser damage threshold was also discovered. Thermogravimetic (TG) and Differential theromogravimetric (DTA) studies were used to measure the thermal stability of the formed crystal. The generated\u0000 LAlA crystals were also subjected to dielectric and photoconductivity tests. The dopant has boosted the efficiency of the L-alanine acetate crystal, according to nonlinear optical studies.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77351939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, a simple but versatile sensing system for very accurate sensing of liquid level and liquid density is presented. The sensor works based on basic strain sensitivity of Fiber Bragg Grating (FBG) and principle of liquid obeying Archimedes’ law of buoyancy. In this system, a cylindrical shaped mass suspended from a Fiber Bragg Grating and partially immersed in the liquid to be sensed. If the liquid level in the container or liquid density varies, that change the up thrust on the suspended mass and load on the Fiber will be changed accordingly. The change in the load on Fiber changes strain on the FBG and the reflected Bragg wavelength also changes. The proposed device with proper calibration should be able to carry out real time and nonstop liquid level and liquid density measurements. A mathematical analysis of the system considering liquid properties and geometrical structure of the suspended mass is presented here. Sensitivity of the system for liquid level monitoring is also reported. Achieved results shows the path for the utilization of the proposed sensor system for precise liquid density measurement and liquid level sensing in very large storage tanks used for commercial/residential applications.
{"title":"Design of a Sensor System Using Fiber Bragg Grating for Liquid Level and Liquid Density Measurement","authors":"Kalyan Biswas","doi":"10.1166/sl.2020.4304","DOIUrl":"https://doi.org/10.1166/sl.2020.4304","url":null,"abstract":"In this work, a simple but versatile sensing system for very accurate sensing of liquid level and liquid density is presented. The sensor works based on basic strain sensitivity of Fiber Bragg Grating (FBG) and principle of liquid obeying Archimedes’ law of buoyancy. In this system,\u0000 a cylindrical shaped mass suspended from a Fiber Bragg Grating and partially immersed in the liquid to be sensed. If the liquid level in the container or liquid density varies, that change the up thrust on the suspended mass and load on the Fiber will be changed accordingly. The change in\u0000 the load on Fiber changes strain on the FBG and the reflected Bragg wavelength also changes. The proposed device with proper calibration should be able to carry out real time and nonstop liquid level and liquid density measurements. A mathematical analysis of the system considering liquid\u0000 properties and geometrical structure of the suspended mass is presented here. Sensitivity of the system for liquid level monitoring is also reported. Achieved results shows the path for the utilization of the proposed sensor system for precise liquid density measurement and liquid level sensing\u0000 in very large storage tanks used for commercial/residential applications.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73721663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper reports the development of simple and economical reduced graphene oxide (rGO) based screen-printed electrodes (SPE) for five basic taste sensing applications. Twenty different test solutions for the five tastes of salty, sour, sweet, umami, and bitter at 1 ppm, 10 ppm, 100 ppm, 1000 ppm concentration levels were tested with the fabricated SPEs. From experimental results, electrical signals generated between the electrode and test solution interface were measured using the potentiometric method. Satisfactory potentiometric responses of SPEs to different ppm concentrations for each sample were used to analyze the sample data. Histogram using the statistical tool was used to analyze the changes in the conductivity response. A multivariate Principal Component Analysis (PCA) statistical tool correlated using loading plots between variables and factors of all the five basic tastes. The plot showed the interrelation between variables and test samples. The obtained experimental results from these rGO based SPEs make them suitable for their use in taste sensing applications such as for any taste disorder disability, food-producing industry, pharmaceutical industries, etc.
{"title":"Potentiometric Taste Sensing Using Reduced Graphene Oxide Screen Printed Electrodes","authors":"A. Patil, U. Tupe, V. Deshmane, A. V. Patil","doi":"10.1166/sl.2020.4302","DOIUrl":"https://doi.org/10.1166/sl.2020.4302","url":null,"abstract":"This paper reports the development of simple and economical reduced graphene oxide (rGO) based screen-printed electrodes (SPE) for five basic taste sensing applications. Twenty different test solutions for the five tastes of salty, sour, sweet, umami, and bitter at 1 ppm, 10 ppm, 100\u0000 ppm, 1000 ppm concentration levels were tested with the fabricated SPEs. From experimental results, electrical signals generated between the electrode and test solution interface were measured using the potentiometric method. Satisfactory potentiometric responses of SPEs to different ppm concentrations\u0000 for each sample were used to analyze the sample data. Histogram using the statistical tool was used to analyze the changes in the conductivity response. A multivariate Principal Component Analysis (PCA) statistical tool correlated using loading plots between variables and factors of all the\u0000 five basic tastes. The plot showed the interrelation between variables and test samples. The obtained experimental results from these rGO based SPEs make them suitable for their use in taste sensing applications such as for any taste disorder disability, food-producing industry, pharmaceutical\u0000 industries, etc.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"47 10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89756018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Dhanunjaya, T. Sonklin, Pimchanok Leuasoongnoen, S. Suksaweang, P. Janphuang, S. Pojprapai
The gold nanoparticles (Au NPs) localized surface plasmon resonance (LSPR) based detection of prostate-specific antigen (PSA) biomarker was carried out in this work. Au NPs on Si and quartz substrates were synthesized by DC magnetron sputtering method followed by conventional annealing protocol. The functionalization of antibody and PSA with Au NPs was evaluated using a simple drop-cost method. The SPR peak intensity was found to be proportional to the PSA concentration. The redshift in SPR peak position might be owing to the change in refractive index around the Au NPs with the conjugation of antibody and further additional binding of specific PSA at different concentrations.
{"title":"Initial Study of Thin-Film Derived Gold Nanoparticles (Au NPs) Surface Plasmon Resonance (SPR) Based Prostate-Specific Antigen (PSA) Detection","authors":"M. Dhanunjaya, T. Sonklin, Pimchanok Leuasoongnoen, S. Suksaweang, P. Janphuang, S. Pojprapai","doi":"10.1166/sl.2020.4286","DOIUrl":"https://doi.org/10.1166/sl.2020.4286","url":null,"abstract":"The gold nanoparticles (Au NPs) localized surface plasmon resonance (LSPR) based detection of prostate-specific antigen (PSA) biomarker was carried out in this work. Au NPs on Si and quartz substrates were synthesized by DC magnetron sputtering method followed by conventional annealing\u0000 protocol. The functionalization of antibody and PSA with Au NPs was evaluated using a simple drop-cost method. The SPR peak intensity was found to be proportional to the PSA concentration. The redshift in SPR peak position might be owing to the change in refractive index around the Au NPs\u0000 with the conjugation of antibody and further additional binding of specific PSA at different concentrations.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74970603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abdul Qayoom Mugheri, Muhammad Soomar Samtio, S. Memon
The evolutionary and rational design we incorporated for an efficient nonprecious metal nanocom-posite electrocatalysts for the hydrogen production which is a scientific challenge in the field of renewable energy. Herein, we report a simple and very active, the functional electrocatalyst for water oxidation which is highly demanded. It is of great prime importance for hydrogen evolution reaction (HER) which significantly contributes to renewable technologies. The values for electrocatalysts are NiCo2O4 and NiCo2O3/P Tafel slope 66 and 42 mV/decade and overpotential of 382 and 320 mV and current density achieved at 10 mA/cm2 anin 1.0 M KOH. The composites are characterized by SEM, HR-TEM, X-ray diffraction, XPS, and SAED. The NiCo2O3/P having high durability measured for 50 hours and its EIS results holding a small charge transfer resistance 28.81 Ohms (Ω) and capacitance containing 0.81 mF. Finally, we give an outlook for the development of these nanoma-terials in the short- and mid-term, highlighting the critical challenges to confront for a lab-to-real life transition of these highly promising nanocomposites.
采用进化和合理的设计，设计了一种高效的非贵金属纳米复合电催化剂，用于制氢，这是可再生能源领域的一个科学挑战。本文报道了一种简单、活性高、功能性强的水氧化电催化剂。析氢反应对可再生能源技术的发展具有重要意义。电催化剂NiCo2O4和NiCo2O3/P的Tafel斜率分别为66和42 mV/decade，过电位分别为382和320 mV，电流密度为10 mA/cm2，电流密度为1.0 M KOH。采用SEM、HR-TEM、x射线衍射、XPS和SAED对复合材料进行了表征。NiCo2O3/P具有50小时的高耐久性，其EIS结果具有28.81欧姆的小电荷转移电阻(Ω)和含有0.81 mF的电容。最后，我们对这些纳米材料的短期和中期发展进行了展望，强调了这些极具前景的纳米复合材料从实验室到现实生活过渡所面临的关键挑战。
{"title":"Nanostructured Composite Catalyst for Electrochemical Water Splitting: Significantly Improved for Hydrogen Evolution Reaction","authors":"Abdul Qayoom Mugheri, Muhammad Soomar Samtio, S. Memon","doi":"10.1166/sl.2020.4293","DOIUrl":"https://doi.org/10.1166/sl.2020.4293","url":null,"abstract":"The evolutionary and rational design we incorporated for an efficient nonprecious metal nanocom-posite electrocatalysts for the hydrogen production which is a scientific challenge in the field of renewable energy. Herein, we report a simple and very active, the functional electrocatalyst\u0000 for water oxidation which is highly demanded. It is of great prime importance for hydrogen evolution reaction (HER) which significantly contributes to renewable technologies. The values for electrocatalysts are NiCo2O4 and NiCo2O3/P Tafel slope 66\u0000 and 42 mV/decade and overpotential of 382 and 320 mV and current density achieved at 10 mA/cm2 anin 1.0 M KOH. The composites are characterized by SEM, HR-TEM, X-ray diffraction, XPS, and SAED. The NiCo2O3/P having high durability measured for 50 hours and\u0000 its EIS results holding a small charge transfer resistance 28.81 Ohms (Ω) and capacitance containing 0.81 mF. Finally, we give an outlook for the development of these nanoma-terials in the short- and mid-term, highlighting the critical challenges to confront for a lab-to-real life transition\u0000 of these highly promising nanocomposites.","PeriodicalId":21781,"journal":{"name":"Sensor Letters","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76426788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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