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Ünaldı AŞ, Çubuk S, Çiğil AB, Kahraman MV. Fluorimetric Reusable Polymeric Sensor for Hydrogen Sulfide Detection. J Fluoresc 2023; 33:1651-1659. [PMID: 36806048 DOI: 10.1007/s10895-023-03181-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 02/11/2023] [Indexed: 02/23/2023]
Abstract
In this study, with the help of reactive monomers, crosslinkers, and photoinitiator that detect H2S in various matrices, an H2S sensitive fluorescence sensor polymerizes under ultraviolet (UV) light was developed. To this goal, a polymeric membrane was prepared, and the characterization of the membrane was carried out with Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) methods. Afterward, appropriate conditions were identified, the excitation wavelength was determined as 370 nm, and the emission wavelength was determined as 425 nm. It was established that the fluorescence intensity of the prepared polymeric membrane decreased in the presence of H2S. A detailed analysis was executed to determine the sensor's most suitable pH value and time. It was found that the optimum pH was 8.0, and the optimal duration was 15 s. It has been calculated that the linear range of the developed method is 2.19 × 10-8- 6.25 × 10-7 M, and the detection limit (LOD) is 7.37 × 10-9 M. The effect of some possible interfering ions was investigated, and it determined that the sensor had excellent selectivity. In addition, the sensor used to determine H2S can be used at least 100 times. The recovery percentages were 102.1%-103.2%, and 104.6%, using tap water samples. In terms of providing reliable, fast results, high sensitivity, reusable, low cost, and ease of use, the developed fluorimetric sensor, compared to standard methods, has become more advantageous.
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Affiliation(s)
- Ayça Şeyma Ünaldı
- Chemistry Department, Faculty of Science, Marmara University, 34722, Istanbul, Türkiye
| | - Soner Çubuk
- Chemistry Department, Faculty of Science, Marmara University, 34722, Istanbul, Türkiye.
| | - Aslı Beyler Çiğil
- Dep. of Chemistry and Chemical Process Technology School, Amasya University Technical Sci. Vocational, Amasya, Türkiye
| | - M Vezir Kahraman
- Chemistry Department, Faculty of Science, Marmara University, 34722, Istanbul, Türkiye
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2
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Li J, Zhu C, Peng W, Cao X, Gao H, Jiang M, Wu Z, Yu C. Stretchable Electrochemical Sensor Based on a Gold Nanowire and Carbon Nanotube Network for Real-Time Tracking Cell-Released H 2S. Anal Chem 2023; 95:2406-2412. [PMID: 36669829 DOI: 10.1021/acs.analchem.2c04477] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Hydrogen sulfide (H2S), as the third gas transporter in biological systems, plays a key role in the regulation of biological cells. Real-time detection of local H2S concentration in vivo is an important and challenging task. Herein, we explored a novel and facile strategy to develop a flexible and transparent H2S sensor based on gold nanowire (AuNW) and carbon nanotube (CNT) films embedded in poly(dimethylsiloxane) (PDMS) (AuNWs/CNTs/PDMS). Taking the advantage of the sandwich-like nanostructured network of AuNWs/CNTs, the prepared electrochemical sensing platform exhibited desirable electrocatalytic activity toward H2S oxidation with a wide linear range (5 nM to 24.9 μM) and a low dete ction limit (3 nM). Furthermore, thanks to the good biocompatibility and flexibility of the sensor, HeLa cells can be cultured directly on the electrode, allowing real-time monitoring of H2S released from cells under a stretched state. This work provides a versatile strategy for the construction of stretchable electrochemical sensors, which has potential applications in the study of H2S-related signal mechanotransduction and pathological processes.
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Affiliation(s)
- Jing Li
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Cailing Zhu
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Wenjing Peng
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Xiaoqing Cao
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Hui Gao
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Mengyuan Jiang
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Zengqiang Wu
- School of Public Health, Nantong University, Nantong 226019, P. R. China
| | - Chunmei Yu
- School of Public Health, Nantong University, Nantong 226019, P. R. China
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3
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Dual-active-site Fe/Cu single-atom nanozymes with multifunctional specific peroxidase-like properties for S2− detection and dye degradation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Zheng Y, Mao S, Zhu J, Fu L, Moghadam M. A scientometric study on application of electrochemical sensors for detection of pesticide using graphene-based electrode modifiers. CHEMOSPHERE 2022; 307:136069. [PMID: 35985381 DOI: 10.1016/j.chemosphere.2022.136069] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/29/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
Pesticide testing is an important topic in environmental protection and food safety. The development of green, accurate and reliable pesticide residue detection methods is an important technical support for implementing of agricultural quality supervision. Electrochemical sensors are a very promising analytical method for pesticide detection due to their high sensitivity, speed, low cost and portability. Performance enhancement of electrochemical sensors is often accompanied by research advances in materials science. Among them, carbon material is a very important electrode material for the fabrication of electrochemical sensors. The discovery of graphene makes it the most promising candidate among carbon materials for sensor performance enhancement. The topic of this review is the use of graphene-modified electrochemical sensors for pesticide detection in the last decade. Traditional literature summaries and bibliometric analyses were used for an in-depth analysis of this topic. In addition to the introduction of different sensor types and performance comparisons, this review also parses the authors' country, keywords and publication frequency. The related research experienced rapid growth several years ago and has now reached a relatively stable stage. We also discuss the perspectives on this topic.
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Affiliation(s)
- Yuhong Zheng
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden, Memorial Sun Yat-Sen), Nanjing, 210014, China
| | - Shuduan Mao
- Interdisciplinary Research Academy, Zhejiang Shuren University, Hangzhou, 310021, PR China.
| | - Jiangwei Zhu
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
| | - Li Fu
- Key Laboratory of Novel Materials for Sensor of Zhejiang Province, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Majid Moghadam
- Department of Chemistry, University of Isfahan, Isfahan, 81746-73441, Iran
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5
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Asif M, Ashraf G, Aziz A, Iftikhar T, Wang Z, Xiao F, Sun Y. Tuning the Redox Chemistry of Copper Oxide Nanoarchitectures Integrated with rGOP via Facet Engineering: Sensing H 2S toward SRB Detection. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19480-19490. [PMID: 35446543 DOI: 10.1021/acsami.2c02119] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The ultrasensitive determination of sulfate reducing bacteria (SRB) is of great significance for their crucial roles in environmental and industrial harms together with the early detection of microbial corrosion. In this work, we report the development of highly efficient electrocatalysts, i.e., Cu2O-CuO extended hexapods (EHPs), which are wrapped on homemade freestanding graphene paper to construct a flexible paper electrode in the electrochemical sensing of the biomarker sulfide for SRB detection. Herein Cu2O-CuO EHPs have been synthesized via a highly controllable and facile approach at room temperature, where the redox centers of copper oxide nanoarchitectures are tuned via facet engineering, and then they are deposited on the graphene paper surface through an electrostatic adsorption to enable homogeneous and highly dense distribution. Owing to the synergistic contribution of high electrocatalytic activity from the Cu mixed oxidation states and abundant catalytically active facets of Cu2O-CuO EHPs and high electrical conductivity of the graphene paper electrode substrate, the resultant nanohybrid paper electrode has exhibited superb electrochemical sensing properties for H2S with a wide linear range up to 352 μM and an extremely low detection limit (LOD) of 0.1 nM with a signal-to-noise ratio of 3 (S/N = 3), as well as high sensitivity, stability, and selectivity. Furthermore, taking advantage of the good biocompatibility and mechanical flexibility, the electrochemical sensing platform based on the proposed electrode has been applied in the sensitive detection of SRB in environmental samples through the sensing of sulfide from SRB, which holds great promise for on-site and online corrosion and environmental monitoring.
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Affiliation(s)
- Muhammad Asif
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Ghazala Ashraf
- School of Biomedical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Ayesha Aziz
- School of Biomedical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Tayyaba Iftikhar
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhanpeng Wang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Fei Xiao
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yimin Sun
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
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6
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Bej S, Ghosh M, Das R, Banerjee P. Evaluation of nanomaterials-grafted enzymes for application in contaminants degradation: Need of the hour with proposed IoT synchronized nanosensor fit sustainable clean water technology in en masse. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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7
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Pandit NR, Bej S, Banerjee P, Biswas B. Unveiling Role of Metals in Mononuclear Metal‐Complexes for Chemodosimetric Detection of S
2−
from aqueous medium: Experimental and DFT Corroboration with Real‐Field Application. ChemistrySelect 2022. [DOI: 10.1002/slct.202200307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Nithun Ranjan Pandit
- Department of Chemistry Presidency University, 86/1 College Street Kolkata 700073 India
| | - Sourav Bej
- Surface Engineering & Tribology Group CSIR-Central Mechanical Engineering Research Institute Mahatma Gandhi Avenue Durgapur 713209 India
- Academy of Scientific & Innovative Research (AcSIR) AcSIR Headquarters CSIR-HRDC Campus Postal Staff College Area, Sector 19, Kamla Nehru Nagar Ghaziabad 201002 Uttar Pradesh India
| | - Priyabrata Banerjee
- Surface Engineering & Tribology Group CSIR-Central Mechanical Engineering Research Institute Mahatma Gandhi Avenue Durgapur 713209 India
- Academy of Scientific & Innovative Research (AcSIR) AcSIR Headquarters CSIR-HRDC Campus Postal Staff College Area, Sector 19, Kamla Nehru Nagar Ghaziabad 201002 Uttar Pradesh India
| | - Biplab Biswas
- Department of Chemistry Presidency University, 86/1 College Street Kolkata 700073 India
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8
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Zhai X, Li S, Wang Y, Cao S, Sun W, Liu M, Mao G, Cao B, Wang H. A magnet-renewable electroanalysis strategy for hydrogen sulfide in aquaculture freshwater using magnetic silver metal-organic frameworks. Anal Chim Acta 2022; 1195:339450. [DOI: 10.1016/j.aca.2022.339450] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/30/2021] [Accepted: 01/04/2022] [Indexed: 11/15/2022]
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9
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Wen R, Li QH, Li YS, Luo YX, Zhao X, Gao XF. Synthesis optimization of rich-urea carbon-dots and application in the determination of H 2S in rich- and barren-liquids of desulphurizing solutions. Analyst 2021; 146:7635-7644. [PMID: 34797361 DOI: 10.1039/d1an01851e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In the research of carbon dots (CDs) containing various nitrogen sources, it was first found that urea/citric acid-CDs showed a selective discolouration reaction with sulphide ions. Therefore, by optimizing various synthesis and detection conditions of the CDs determining sulfur ions, such as the raw material ratio, temperature, time, pH, and oxidation atmosphere in the CD synthesis, a discolour CD-probe method for trace-level sulphide ions was developed. The method is environmentally friendly, shows two linear-response ranges in 0.050-1.0 mg L-1 (A = -0.0827c + 0.8366) and 1.0-15 mg L-1 S2- (A = -0.0209c + 0.7587) and can be used for the high and low concentration quantification of sulphide in various wastewaters. Subsequently, in order to realize the separation and detection of sulphide ions in wastewaters or rich- and barren-liquids containing N-methyldiethanolamine and other substances in desulphurizing solutions, an automatic pretreatment system was also established.
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Affiliation(s)
- Rong Wen
- School of Chemical Engineering, Sichuan University, Chengdu, China.
| | - Qiao-Hui Li
- School of Engineering, Nanjing agricultural university, Nanjing, China
| | - Yong-Sheng Li
- School of Chemical Engineering, Sichuan University, Chengdu, China.
| | - Ya-Xiong Luo
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China.
| | - Xia Zhao
- PetroChina Southwest Oil & Gasfield Company, Natural Gas Purification Plant General, Chongqing, China
| | - Xiu-Feng Gao
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China.
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10
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Zeng HH, Yu K, Huang J, Liu F, Zhang ZY, Chen SP, Zhang F, Guan SP, Qiu L. Ratiometric fluorescence detection of sulfide ions based on lanthanide coordination polymer using guanosine diphosphate as ligand. Colloids Surf B Biointerfaces 2021; 204:111796. [PMID: 33933879 DOI: 10.1016/j.colsurfb.2021.111796] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 04/01/2021] [Accepted: 04/25/2021] [Indexed: 12/27/2022]
Abstract
The efficiency of energy transfer from guanine nucleotide to terbium ion (Tb3+) is affected by the phosphate group significantly. Compared with the biomolecules 5'-GMP (guanosine monophosphate), guanosine diphosphate (GDP) exhibits better sensitize ability to Tb3+ ions luminescence. Assisted with the carboxycoumarin ligand, we synthesized a more stable optical Coumarin@GDP-Tb polymer with the characteristic emission peaks located on 440 nm and 545 nm in this work. The Coumarin@GDP-Tb polymer is not only rich in metal binding sites, but also maintains a moderate ionic binding force, which helps metal ions to bind or leave it easily. Experiment result shows that Coumarin@GDP-Tb polymer has the appropriate binding force for Fe2+ ions, which can be destroyed by sulfur ions (S2-) as the formation of FeS precipitation. Based on this, Coumarin@GDP-Tb was designed as the ratio fluorescence probe for sulfur ions detection, where the fluorescence at 545 nm can be selectively quenched by Fe2+ ions, while that at 440 nm was unaffected, in the presence of S2- ions, the quenched fluorescence can be recovered remarkably. With the increasing S2- ions from 0.1-45 μM, the ratio of fluorescence intensity at 545 nm to 440 nm (F545/F440) is linear to S2- concentration, and the detection limit of S2- was calculated to be 0.073 μM. Contrast to those fluorescence probes with single wavelength emission, Coumarin@GDP-Tb displays a comparable sensitivity, the introduced self-adjust wavelength improved the detection accuracy efficiently. The above 98.1 % recovery rates of S2- ions in the actual water sample demonstrated the practicability of Coumarin@GDP-Tb fluorescence probe.
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Affiliation(s)
- Hui-Hui Zeng
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China.
| | - Kun Yu
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
| | - Jian Huang
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
| | - Fang Liu
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
| | - Zhi-Yi Zhang
- Jiangxi Institute of Analyzing and Testing, Nanchang, 330029, China
| | - Shi-Ping Chen
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
| | - Fei Zhang
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
| | - Shu-Ping Guan
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
| | - Li Qiu
- Jiangxi Key Laboratory of Industrial Ceramics, College of Materials and Chemical Engineering, Pingxiang University, Pingxiang, 337055, China
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11
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Pandit NR, Bej S, Mondal A, Ghosh M, Kostakis GE, Powell AK, Banerjee P, Biswas B. Exploratory studies on azido-bridged complexes (Ni 2+ and Mn 2+) as dual colourimetric chemosensors for S 2- and Ag +: combined experimental and theoretical outcomes with real field applications. Dalton Trans 2020; 49:13090-13099. [PMID: 32929443 DOI: 10.1039/d0dt02846k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report two isostructural dinuclear transition metal complexes [M2(HL)2(N3)4], where M = Ni2+ (BS-1), Mn2+ (BS-2), and HL is (2-methyl-2-((pyridin-2-ylmethyl)amino)propan-1-ol) and investigate them as molecular sensors towards hazardous entities. BS-1 shows high selectivity towards the S2- and Ag+ ions, easily observed by the naked eye colour change and its detection limit in aqueous solutions for the S2- ion was calculated as 0.55 μM with a binding constant of 3.28 × 105 M-1, while the limit for the Ag+ ion is 21.8 μM. Notably, BS-2 shows good selectivity towards the Ag+ ion with a detection limit of 10.84 μM. Spectroscopic and DFT studies shed light on the mechanistic course of interaction between the host and guest entities, suggesting a sulphide-mediated reduction of the azide mechanism. In a nutshell, these simple transition metal complexes were exploited for discriminately detecting hazardous analytes with real field applications in analytical science (via. "Dip-Stick" approach) as well as engineering science, which provides a significant contribution in the recent advancement of supramolecular chemistry.
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Affiliation(s)
- Nithun Ranjan Pandit
- Department of Chemistry, Presidency University, 86/1, College Street, Kolkata 700073, India.
| | - Sourav Bej
- Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, India. and Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad - 201002, Uttar Pradesh, India
| | - Ananya Mondal
- Department of Chemistry, Presidency University, 86/1, College Street, Kolkata 700073, India. and Vidyasagar College for Women, 39 Sankar Ghosh Lane, Kolkata, 6, West Bengal, India
| | - Meenakshi Ghosh
- Vidyasagar College for Women, 39 Sankar Ghosh Lane, Kolkata, 6, West Bengal, India
| | | | - Annie K Powell
- InstitutfürAnorganischeChemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, D-76131 Karlsruhe, Germany
| | - Priyabrata Banerjee
- Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, India. and Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad - 201002, Uttar Pradesh, India
| | - Biplab Biswas
- Department of Chemistry, Presidency University, 86/1, College Street, Kolkata 700073, India.
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12
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Emir G, Karakaya S, Dilgin Y. Pyrocatechol Violet Modified Graphite Pencil Electrode for Flow Injection Amperometric Determination of Sulfide. J ELECTROCHEM SCI TE 2020. [DOI: 10.33961/jecst.2019.00605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Electrochemiluminescence immunoassay of human chorionic gonadotropin using silver carbon quantum dots and functionalized polymer nanospheres. Mikrochim Acta 2020; 187:482. [PMID: 32749541 DOI: 10.1007/s00604-020-04450-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 07/12/2020] [Indexed: 02/08/2023]
Abstract
A composite, reduced graphene oxide (rGO) doped with silver nanoparticles (Ag NPs), was prepared by using binary reductants of sodium citrate and hydrazine hydrate. Carbon quantum dots (CQDs) synthesized by papaya peel combined with silver ions to form a CQDs-loaded silver nanoparticle (AgCQDs) nanocomposite. Polymer nanospheres (PNS) were generated via the infinite coordination polymer of ferrocene dicarboxylic acid and employed as carriers to load AgCQDs. The prepared AgCQDs@PNS-PEI has good biocompatibility and electrical conductivity and can be used as a matrix for the immobilization of a secondary antibody (Ab2). A sandwich-type electrochemiluminescence (ECL) immunosensor using AgCQDs@PNS-PEI nanocomposite as probe has been developed for the detection of human chorionic gonadotropin (HCG). The proposed immunosensor exhibits a linear range from 0.00100 to 500 mIU mL-1 and the detection limit is 0.33 μIU mL-1 (S/N = 3) under optimal conditions. The sensor exhibits excellent selectivity, good reproducibility, and high stability. These features demonstrate that the proposed method has promising potential for clinical protein detection and displays a new strategy to fabricate an immunosensor. Graphical abstract.
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14
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A highly sensitive competitive immunosensor based on branched polyethyleneimine functionalized reduced graphene oxide and gold nanoparticles modified electrode for detection of melamine. Food Chem 2020; 304:125397. [DOI: 10.1016/j.foodchem.2019.125397] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 08/06/2019] [Accepted: 08/18/2019] [Indexed: 12/25/2022]
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15
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Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode. SENSORS 2019; 19:s19245483. [PMID: 31842420 PMCID: PMC6960803 DOI: 10.3390/s19245483] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 12/22/2022]
Abstract
A selective and sensitive electrochemical sensor was developed for simultaneous detection of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA). The sensing interface was fabricated on a porous, three-dimensional networked graphene hydrogel (GH) modified glassy carbon electrode (GCE). The electrocatalytic behavior of IAA and SA on the surface of the modified electrode (GH/GCE) was investigated by cyclic voltammetry and linear sweep voltammetry. Results show that the oxidation reactions of IAA and SA occur at different potentials, which enable their simultaneous detection at the sensing interface. Under optimal conditions, the GH/GCE exhibited good selectivity and stability and its response, unaffected by various interferents, was linear in the range of 4 to 200 μM of IAA and SA. The limit of detection (S/N = 3) achieved were 1.42 μM for IAA and 2.80 μM for SA. The sensor performance was validated by measuring for IAA and SA in real vegetable samples with satisfactory results.
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16
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Lu L, Zhu Z, Hu X. Hybrid nanocomposites modified on sensors and biosensors for the analysis of food functionality and safety. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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17
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El-Maghrabey MH, Watanabe R, Kishikawa N, Kuroda N. Detection of hydrogen sulfide in water samples with 2-(4-hydroxyphenyl)-4,5-di(2-pyridyl)imidazole-copper(II) complex using environmentally green microplate fluorescence assay method. Anal Chim Acta 2019; 1057:123-131. [PMID: 30832911 DOI: 10.1016/j.aca.2019.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 01/06/2023]
Abstract
Hydrogen sulfide (H2S) is a colorless toxic gas which can be found as HS- in rivers and waste waters especially in the occupational susceptible environment. Herein we synthesized a lophine analogue, 2-(4-hydroxyphenyl)-4,5-di(2-pyridyl)imidazole (HPI), which fluoresces at 410 nm after excitation at 280 nm. HPI has an imidazole ring and a pyridine ring which are capable of forming coordinate bonds with copper (Cu(II)) that cause quenching of HPI fluorescence. We found that HS- can selectively liberate HPI from the complex via formation of CuS, thus, HPI regains its fluorescence properties. Interestingly, the probe was proved to be regenerable. This reaction was used for the development of a fluorescence microplate assay for the determination of HS- in environmental samples. The method was applied to river water samples and was able to detect HS- in concentrations down to 5 ppb with acceptable accuracy (90.3-103.0%) and good precision (%RSD ≤ 4.1). The method showed many advantages over the previously reported ones including instantaneous reaction, simple probe synthesis, high-throughput, high selectivity toward hydrogen sulfide over other ions and sulfur or thiol containing compounds and at last, it complies with the green chemistry rules through using a regenerable probe, aqueous solvents, and miniaturized measurement system.
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Affiliation(s)
- Mahmoud H El-Maghrabey
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Riho Watanabe
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naoya Kishikawa
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naotaka Kuroda
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan.
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18
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Wang Y, Zhang P, Liu L, Xue F, Liu M, Li L, Fu W. Regulating peroxidase-like activity of Pd nanocubes through surface inactivation and its application for sulfide detection. NEW J CHEM 2019. [DOI: 10.1039/c8nj05138k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The peroxidase-like activity of Pd nanocubes is regulated by the formation of surface PdS layers, which has been applied for sulfide assay in environmental water samples.
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Affiliation(s)
- Yi Wang
- Chongqing Key Laboratory of Green Synthesis and Applications, and College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- China
| | - Pu Zhang
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- China
| | - Lei Liu
- Chongqing Key Laboratory of Green Synthesis and Applications, and College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- China
| | - Fei Xue
- International Research Center for Renewable Energy
- State Key Laboratory of Multiphase Flow in Power Engineering
- Xi’an Jiaotong University
- Xi’an
- China
| | - Maochang Liu
- International Research Center for Renewable Energy
- State Key Laboratory of Multiphase Flow in Power Engineering
- Xi’an Jiaotong University
- Xi’an
- China
| | - Ling Li
- Chongqing Key Laboratory of Green Synthesis and Applications, and College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- China
| | - Wensheng Fu
- Chongqing Key Laboratory of Green Synthesis and Applications, and College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- China
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19
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Asif M, Aziz A, Ashraf G, Wang Z, Wang J, Azeem M, Chen X, Xiao F, Liu H. Facet-Inspired Core-Shell Gold Nanoislands on Metal Oxide Octadecahedral Heterostructures: High Sensing Performance toward Sulfide in Biotic Fluids. ACS APPLIED MATERIALS & INTERFACES 2018; 10:36675-36685. [PMID: 30298714 DOI: 10.1021/acsami.8b12186] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The development of structurally modified metal oxide heteroarchitectures with higher energy facets exposed has been of extensive research interests because of their unique construction and synergy effect of multifunctioning characteristics. In this study, we reported for the first time the development of a distinct type of gold nanoislands (AuNIs) on metal oxides (i.e., Cu2O-CuO) octadecahedral (ODH) heterostructures through the galvanic exchange reaction, where Cu2O not only acts as a stabilizer but also functions as a reductant. The electrocatalytic performance of the resultant core-shell Cu2O-CuO@AuNI ODH-based electrochemical sensing platform has been evaluated in ultrasensitive detection of sulfide as early disease diagnostics and bacterial marker. Owing to the synergistic collaboration of enhanced surface active sites, exposed {110} crystallographic facets, mixed valances of copper that encourage redox reactions at electrode material/analyte interface, and the polarization effect provide by AuNIs decorated onto the Cu2O surface, Cu2O-CuO@AuNI ODH-modified electrode has demonstrated striking electrochemical sensing performance toward sulfide oxidation in terms of broad linear range, real detection limit down to 1 nM (S/N = 3), and incredible durability and reproducibility. In virtue of marvelous efficiency, the proposed electrochemical sensor based on Cu2O-CuO@AuNI ODH has been employed in in situ sensitive detection of a ubiquitous amount of sulfide engendered by sulfate-reducing bacteria and real-time tracking of sulfide efflux from live cells as early diagnostic strategies.
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20
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Shalini Devi KS, Senthil Kumar A. A blood-serum sulfide selective electrochemical sensor based on a 9,10-phenanthrenequinone-tethered graphene oxide modified electrode. Analyst 2018; 143:3114-3123. [PMID: 29868662 DOI: 10.1039/c8an00756j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The sulfide ion and its associated species (H2S and HS-) are widely referred to as toxic chemicals. However, at concentrations of ∼10-100 μM, it serves as a neurotransmitter and signaling agent in biological systems. Abnormalities in blood serum sulfide can be an indication of several diseases, including diabetes, wherein there is a significant reduction in the sulfide ion concentration (<10 μM). Herein, we wish report a 9,10-phenanthrenequinone (PQn) tethered graphene oxide (GO) modified glassy carbon electrode (GCE/GO@PQn) for the highly selective and stable electrocatalytic oxidation and flow injection analysis (FIA) of sulfide ions. The electrode exhibits a detection range of 1-100 μM, and is suitable for the common biochemical interference-free detection of blood serum sulfide in pH 7 phosphate buffer solution. The modified electrode was found to be tolerant of interfering chemicals such as cysteine, uric acid, ascorbic acid, nitrate, glucose, hydrogen peroxide, nitrate, nitrite and dissolved oxygen. This is unlike conventional redox mediator modified electrodes, which all show marked interference with the above-mentioned chemicals during sulfide detection. A constructed FIA calibration plot (applied potential, Eapp = 0.15 V vs. Ag/AgCl) was linear in the sulfide concentration ranges of 1-100 μM (1st region) and 300 μM-5 mM (2nd region) with a detection limit value of 700 nM. The selective and quick FIA of sulfide ions in three diabetic patient blood samples along with a control was demonstrated as a proof of concept.
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Affiliation(s)
- K S Shalini Devi
- Nano and Bioelectrochemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632 014, India.
| | - Annamalai Senthil Kumar
- Nano and Bioelectrochemistry Research Laboratory, Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632 014, India. and Carbon dioxide Research and Green Technology Centre, Vellore Institute of Technology, Vellore-632 014, India and Institute of Biochemical and Biomedical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan, Republic of China
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21
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Yan Q, Yang Y, Tan Z, Liu Q, Liu H, Wang P, Chen L, Zhang D, Li Y, Dong Y. A label-free electrochemical immunosensor based on the novel signal amplification system of AuPdCu ternary nanoparticles functionalized polymer nanospheres. Biosens Bioelectron 2017; 103:151-157. [PMID: 29291595 DOI: 10.1016/j.bios.2017.12.040] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/18/2017] [Accepted: 12/23/2017] [Indexed: 12/23/2022]
Abstract
A sensitive label-free electrochemical immunosensor was designed using a novel signal amplification system for quantitative detecting hepatitis B surface antigen (HBsAg). Nitrogen-doped graphene quantum dots (N-GQDs) supported surfactant-free AuPdCu ternary nanoparticles (AuPdCu/N-GQDs), which featured with good conductivity and excellent catalytic properties for the reduction of hydrogen peroxide (H2O2), was synthesized by a simple and benign hydrothermal procedure. At the same time, the electroactive polymer nanospheres (PS) was synthesized by infinite coordination polymers of ferrocenedicarboxylic acid, which could play as carrier and electronic mediator to load AuPdCu/N-GQDs. The PS not only improved the ability to load antibodies because of the good biocompatibility, but also accelerated electron transport of the electrode interface attribute to plentiful ferrocene unit. Thus, the prepared AuPdCu/N-GQDs@PS has abilities of good biocompatibility, catalytic activity and electrical conductivity to be applied as transducing materials to amplify electrochemical signal in detection of HBsAg. Under optimal conditions, the fabricated immunosensor exhibited high sensitivity and stability in the detection of HBsAg. A linear relationship between current signals and the concentrations of HBsAg was obtained in the range from 10fg/mL to 50ng/mL and the detection limit of HBsAg was 3.3fg/mL (signal-to-noise ratio of 3). Moreover, the designed immunosensor with excellent selectivity, reproducibility and stability shows excellent performance in detection of human serum samples. Furthermore, this label-free electrochemical immunosensor has promising application in clinical diagnosis of HBsAg.
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Affiliation(s)
- Qin Yan
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Yuying Yang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Zhaoling Tan
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Qing Liu
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China.
| | - Hui Liu
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Ping Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Lei Chen
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Daopeng Zhang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Yueyun Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
| | - Yunhui Dong
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, PR China
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22
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Yan Y, Zhang K, Yu H, Zhu H, Sun M, Hayat T, Alsaedi A, Wang S. Sensitive detection of sulfide based on the self-assembly of fluorescent silver nanoclusters on the surface of silica nanospheres. Talanta 2017; 174:387-393. [DOI: 10.1016/j.talanta.2017.06.027] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/04/2017] [Accepted: 06/10/2017] [Indexed: 12/25/2022]
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23
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Curcumin-quinone immobilised carbon black modified electrode prepared by in-situ electrochemical oxidation of curcumin-phytonutrient for mediated oxidation and flow injection analysis of sulfide. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.09.054] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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24
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Jing Y, Yu B, Li P, Xiong B, Cheng Y, Li Y, Li C, Xiao X, Chen M, Chen L, Zhang Y, Zhao M, Cheng C. Synthesis of graphene/DPA composite for determination of nicotine in tobacco products. Sci Rep 2017; 7:14332. [PMID: 29084991 PMCID: PMC5662576 DOI: 10.1038/s41598-017-13716-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 09/27/2017] [Indexed: 11/14/2022] Open
Abstract
In this contribution, the azo dye (E)-1-(4-((4-(phenylamino)phenyl)diazenyl) phenyl)ethanone (DPA) was combined with reduced graphene oxide (RGO) for the electrochemical modification of a pencil graphite electrode (RGO/DPA/PGE) surface. A series of electrochemical measurements were used for the characterization of the modified electrode surfaces. At the modified electrode, nicotine was irreversibly reduced. An obvious increase was observed in the reductive peak current of nicotine at the modified electrode, indicating the capability of the RGO/DPA composite to increase the electron transfer rate. The current was found proportional to the nicotine concentration in a range of 31 to 1900 μM, and the limit of detection (LOD) was calculated as 7.6 μM.
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Affiliation(s)
- Yanqiu Jing
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, Henan province, China
| | - Baohua Yu
- Economics and Management College, National Tobacco Cultivation and Physiology and Biochemistry Research Centre, Henan Agricultural University, Zhengzhou, China
| | - Penghui Li
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, Henan province, China
| | - Bin Xiong
- Technology Center of Hubei China Tobacco Industry Co, Ltd., Wuhan, Hubei Province, China
| | - Yuyuan Cheng
- Nanyang Branch of Henan Tobacco Corporation, Nanyang, Henan Province, China
| | - Yaoguang Li
- Technology Center of Henan China Tobacco Industrial Co, Ltd., Zhengzhou, Henan Province, China
| | - Chunguang Li
- Technology Center of Henan China Tobacco Industrial Co, Ltd., Zhengzhou, Henan Province, China
| | - Xianyi Xiao
- Ganzhou Branch of Jiangxi Tobacco Corporation, Ganzhou, Jiangxi Province, China
| | - Mengqi Chen
- Technology Center of Henan China Tobacco Industrial Co, Ltd., Zhengzhou, Henan Province, China
| | - Liangyuan Chen
- Technology Center of Henan China Tobacco Industrial Co, Ltd., Zhengzhou, Henan Province, China
- Key Laboratory of Tobacco Processing Morphology Research in Tobacco Industry of CNTC, Zhengzhou, Henan Province, China
| | - Yu Zhang
- School of Geographical Science and Tourism, Meizhou Jiaying University, Meisong Avenue, Meizhou, 514015, China
| | - Mingqin Zhao
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, Henan province, China.
| | - Chuance Cheng
- College of Tobacco Science, Henan Agricultural University, Zhengzhou, Henan province, China.
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25
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Emir G, Dilgin Y. Flow Injection Analysis of Sulfide at a Calmagite-Modified Pencil Graphite Electrode. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1317782] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Gamze Emir
- Department of Chemistry, Faculty of Arts and Science, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Yusuf Dilgin
- Department of Chemistry, Faculty of Arts and Science, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
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26
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Li C, Zhang D, Wang J, Hu P, Jiang Z. Magnetic MoS 2 on multiwalled carbon nanotubes for sulfide sensing. Anal Chim Acta 2017; 975:61-69. [DOI: 10.1016/j.aca.2017.04.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 04/07/2017] [Accepted: 04/19/2017] [Indexed: 12/25/2022]
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27
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Surucu O, Bolat G, Abaci S. Electrochemical behavior and voltammetric detection of fenitrothion based on a pencil graphite electrode modified with reduced graphene oxide (RGO)/poly(E)-1-(4-((4-(phenylamino)phenyl)diazenyl)phenyl)ethanone (DPA) composite film. Talanta 2017; 168:113-120. [DOI: 10.1016/j.talanta.2017.03.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 03/09/2017] [Accepted: 03/11/2017] [Indexed: 12/20/2022]
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28
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Singh S, Mitra K, Shukla A, Singh R, Gundampati RK, Misra N, Maiti P, Ray B. Brominated Graphene as Mimetic Peroxidase for Sulfide Ion Recognition. Anal Chem 2016; 89:783-791. [DOI: 10.1021/acs.analchem.6b03535] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Shikha Singh
- Department
of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Kheyanath Mitra
- Department
of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Aparna Shukla
- School
of Material Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India
| | - Rajshree Singh
- Department
of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Ravi Kumar Gundampati
- Molecular
Biology Unit, Institute of Medical Science, Banaras Hindu University, Varanasi 221005, India
| | - Nira Misra
- School
of Biomedical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India
| | - Pralay Maiti
- School
of Material Science and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India
| | - Biswajit Ray
- Department
of Chemistry, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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29
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Organic semiconductor polymer nanodots as a new kind of off-on fluorescent probe for sulfide. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-2027-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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30
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Robledo SN, López JC, Granero AM, Zensich MA, Morales GM, Fernández H, Zon MA. Characterization of the surface redox process of caffeic acid adsorbed at glassy carbon electrodes modified with partially reduced graphene oxide. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Electrochemical gene sensor based on a glassy carbon electrode modified with hemin-functionalized reduced graphene oxide and gold nanoparticle-immobilized probe DNA. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1999-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Liu B, Han S. Determination of trace hydrogen sulfide by using the permanganate induced chemiluminescence of carbon dots. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1957-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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