Journal ArticleDOI
Design and Fabrication of Yttrium Ferrite Garnet-Embedded Graphitic Carbon Nitride: A Sensitive Electrocatalyst for Smartphone-Enabled Point-of-Care Pesticide (Mesotrione) Analysis in Food Samples.
Umamaheswari Rajaji,Sathishkumar Chinnapaiyan,Shen-Ming Chen,Mani Govindasamy,Jose Ilton de Oliveira Filho,Walaa Khushaim,Veerappan Mani +6 more
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TLDR
In this paper, an electrocatalyst made up of yttrium iron garnet (Y3Fe5O12; YIG) and graphitic carbon nitride (GCN) was used for mesotrione (MTO) detection.Abstract:
As the use of pesticides in agriculture is increasing at an alarming rate, food contamination by pesticide residues is becoming a huge global problem. It is essential to develop a sensitive and user-friendly sensor device to quantify trace levels of pesticide and herbicide residues in food samples. Herein, we report an electrocatalyst made up of yttrium iron garnet (Y3Fe5O12; YIG) and graphitic carbon nitride (GCN) to attain picomolar-level detection sensitivity for mesotrione (MTO), which is a widely used herbicide in agriculture. First, YIG was prepared by a hydrothermal route; then, it was loaded on GCN sheets via a calcination method. The surface structures, composition, crystallinity, and interfacial and electrocatalytic properties of the YIG and YIG/GCN were analyzed. As the YIG/GCN displayed better surface and catalytic properties than YIG, YIG/GCN was modified on a screen-printed carbon electrode to fabricate a sensor for MTO. The YIG/GCN-modified electrode displayed a detection limit of 950 pM for MTO. The method was demonstrated in (spiked) fruits and vegetables. Then, the modified electrode was integrated with a miniaturized potentiostat called KAUSTat, which can be operated wirelessly by a smartphone. A first smartphone-based portable sensor was demonstrated for MTO that is suitable for use in nonlaboratory settings.read more
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Portable electrochemical sensing methodologies for on-site detection of pesticide residues in fruits and vegetables
Reddicherla Umapathi,Yunusova Nafosat Abduhamidovna,Seyed Majid Ghoreishian,Sonam Sonwal,Gokana Mohana Rani,Yun Suk Huh,Yun Suk Huh +6 more
TL;DR: In this article, a comprehensive review of portable electrochemical (bio) sensing methods for point-of-care and on-site detection of pesticides residues in fruits and vegetables is presented.
Journal ArticleDOI
Portable electrochemical sensing methodologies for on-site detection of pesticide residues in fruits and vegetables
TL;DR: In this article , a comprehensive review of portable electrochemical (bio) sensing methods for point-of-care and on-site detection of pesticides residues in fruits and vegetables is presented.
Journal ArticleDOI
Recent advances in the use of graphitic carbon nitride-based composites for the electrochemical detection of hazardous contaminants
Reddicherla Umapathi,C. Venkateswara Raju,Seyed Majid Ghoreishian,Gokana Mohana Rani,Krishan Kumar,Mi Hwa Oh,Jong Pil Park,Yun Suk Huh +7 more
TL;DR: In this paper , the potential of graphitic carbon nitride (g-C 3 N 4 or GCN) based nanostructures for the on-site electrochemical detection of hazardous contaminants is discussed.
Journal ArticleDOI
Portable electrochemical biosensor based on laser-induced graphene and MnO2 switch-bridged DNA signal amplification for sensitive detection of pesticide
TL;DR: In this article , a novel electrochemical biosensor was constructed by integrating laser-induced graphene (LIG) electrode on polyimide (PI) foil and MnO2 nanosheets loaded on the paper for POCT of organophosphorus (OPs) residues.
References
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Agricultural insecticides threaten surface waters at the global scale.
Sebastian Stehle,Ralf Schulz +1 more
TL;DR: The data show that more than 50% of detected insecticide concentrations exceed regulatory threshold levels, which indicates that surface water pollution resulting from current agricultural insecticide use constitutes an excessive threat to aquatic biodiversity and suggests the biological integrity of global water resources is at a substantial risk.
Journal ArticleDOI
Fabrication and Enhanced Photoelectrochemical Performance of MoS2/S-Doped g-C3N4 Heterojunction Film
Lijuan Ye,Dan Wang,Shijian Chen +2 more
TL;DR: The fabricated MoS2/S-doped g-C3N4 heterojunction film offers an enhanced anodic photocurrent of as high as ∼1.2 × 10(-4) A/cm(2) at an applied potential of +0.5 V vs Ag/AgCl under the visible light irradiation.
Journal ArticleDOI
Open-Source Potentiostat for Wireless Electrochemical Detection with Smartphones
Alar Ainla,Maral P. S. Mousavi,Maria-Nefeli Tsaloglou,Julia Redston,Jeffrey G. Bell,M. Teresa Fernández-Abedul,George M. Whitesides +6 more
TL;DR: The UWED is simple, small in size, assembled from inexpensive components, and completely wireless, it offers new opportunities for the development of affordable diagnostics, sensors, and wearable devices.
Journal ArticleDOI
Recent development in graphitic carbon nitride based photocatalysis for hydrogen generation
Muhammad Salman Nasir,Guorui Yang,Iqra Ayub,Silan Wang,Ling Wang,Xiaojun Wang,Wei Yan,Shengjie Peng,Seeram Ramakarishna +8 more
TL;DR: The graphitic carbon nitride (g-C3N4) has an attractive band structure, good chemical stability, earth-abundant and significantly easily fabricated which makes an application for the generation of hydrogen by water splitting as discussed by the authors.
Journal ArticleDOI
Improvement in photocatalytic H2 evolution over g-C3N4 prepared from protonated melamine
TL;DR: In this article, the porous g-C 3 N 4 (pm-g-C3 N 4 ) samples were prepared by sintering protonated melamine.