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Sagar P, Srivastava M, Tiwari RK, Kumar A, Srivastava A, Pandey G, Srivastava S. In-situ One-pot Novel Synthesis of Molybdenum di-Telluride@Carbon Nano-Dots for Sensitive and Selective Detection of Hydrogen Peroxide Molecules via Turn-off Fluorescence Mechanism. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108134] [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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Rajendran S, Manoj D, Suresh R, Vasseghian Y, Ghfar AA, Sharma G, Soto-Moscoso M. Electrochemical detection of hydrogen peroxide using micro and nanoporous CeO 2 catalysts. ENVIRONMENTAL RESEARCH 2022; 214:113961. [PMID: 35932831 DOI: 10.1016/j.envres.2022.113961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/27/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
In this research work, focus has been made on a glassy carbon electrode (GCE) modified commercial micro and synthesized nano-CeO2 for the detection of hydrogen peroxide (H2O2). Firstly, CeO2 nanoleaves were prepared by solvothermal route. Both commercially available micro CeO2 and synthesized nano-CeO2 structures were analyzed by different characterization techniques. The Raman spectra of synthesized nano CeO2 has more oxygen vacancies than micro CeO2. SEM images revealed that the synthesized CeO2 acquired leaf-like morphology. The catalyst nano CeO2 offered mesoporosity from nitrogen adsorption-desorption isotherms with massive sites of activation for increasing efficiency. Experiments on determining H2O2 using micro CeO2 or nano-CeO2/GCE was conducted using cyclic voltammetry (CV) and amperometry. Enhanced H2O2 reduction peak current with lower potential was observed in nano-CeO2/GCE. The influence of scan rate and H2O2 concentration on the performance of nano-CeO2/GCE were also studied. The obtained results have indicated that nano-CeO2/GCE showed improved electrochemical sensing behavior towards the reduction of H2O2 than micro-CeO2/GCE and bare GCE. A linear relationship was obtained over 0.001 μM-0.125 μM concentration of H2O2, with good sensitivity 141.96 μA μM-1 and low detection limit of 0.4 nM. Hence, the present nano-CeO2 system will have a great potential with solvothermal synthesis approach in the development of electrochemical sensors.
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Affiliation(s)
- Saravanan Rajendran
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, 1775, Arica, Chile.
| | - Devaraj Manoj
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, 1775, Arica, Chile
| | - R Suresh
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avda. General Velásquez, 1775, Arica, Chile
| | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - Ayman A Ghfar
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Gaurav Sharma
- Instituto de Productos Naturales y Agrobiología, Consejo Superior de Investigaciones Científicas (IPNA-CSIC), Avda. Astrofísico Fco. Sánchez 3, 38206, La Laguna, Spain
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Gubbi Shivarathri P, Rajappa S, Kalenahally Swamygowda D, Chattanahalli Devendrachari M, Makri Nimbegondi Kotresh H. Green mechanochemical route for the synthesis of carboxy-rich polyaniline/multiwalled carbon nanotubes composite as a competent adsorbent for cationic dyes. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2022.2135541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Poornima Gubbi Shivarathri
- Department of Chemistry, Acharya Institute of Technology, Bangalore, India
- Department of Chemistry, New Horizon College of Engineering, Bangalore, India
| | - Shwetha Rajappa
- Department of Chemistry, Acharya Institute of Technology, Bangalore, India
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Metallic deep eutectic solvents-assisted synthesis of Cu, Cl-doped carbon dots as oxidase-like and peroxidase-like nanozyme for colorimetric assay of hydroquinone and H2O2. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chandrakala K, Giddaerappa, Venugopala Reddy K, Shivaprasad K. Investigational undertaking descriptors for reduced graphene oxide-phthalocyanine composite based catalyst for electrochemical oxygen evolution reaction. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Giddaerappa, Manjunatha N, Shantharaja, Hojamberdiev M, Sannegowda LK. Tetraphenolphthalein Cobalt(II) Phthalocyanine Polymer Modified with Multiwalled Carbon Nanotubes as an Efficient Catalyst for the Oxygen Reduction Reaction. ACS OMEGA 2022; 7:14291-14304. [PMID: 35573214 PMCID: PMC9089694 DOI: 10.1021/acsomega.2c01157] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 04/04/2022] [Indexed: 11/17/2023]
Abstract
Oxygen reduction reaction (ORR) is the main reaction at the cathode of a fuel cell that utilizes Pt/C as the benchmark catalyst. Due to sluggish activity, high cost, rare abundance, and durability issues, Pt/C must be replaced by nonprecious, stable, and easily synthesizable materials. This work involves the synthesis of novel, simple, low-cost, and environmentally friendly phenolphthalein-bearing cobalt(II) phthalocyanine polymer, poly(Co II TPpPc) dyad, as an efficient catalyst for ORR. The results of analytical characterizations reveal the formation of the poly(Co II TPpPc) polymer in the pure state. To further enhance the catalytic response of poly(Co II TPpPc), a hybrid composite is prepared using poly(Co II TPpPc) and multiwalled carbon nanotubes (MWCNTs) that increase the surface area and conductivity. The poly(Co II TPpPc) and hybrid composite are separately deposited on the electrode surfaces. The electron microscopy images confirm the uniform distribution of the poly(Co II TPpPc) molecules on the electrode surface and MWCNTs. The poly(Co II TPpPc) and hybrid composite electrodes are evaluated for ORR, and the hybrid composite exhibits better onset potential at 0.803 V versus reversible hydrogen reference electrode for ORR according to linear sweep voltammograms (LSVs). The obtained data are superior compared to those of other carbon-based redox-active materials reported previously and nearer to those of the benchmark catalyst (Pt/C). The rotating disc electrode measurement of the hybrid composite electrode confirms the total number of electrons involved in ORR to be four. Furthermore, the hybrid composite electrode exhibits an excellent stability for 100 LSV scans. The synergistic effect of poly(Co II TPpPc) and MWCNTs leads to the surprisingly high ORR activity due to the improved surface area, conductivity, and interfacial confined surface.
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Affiliation(s)
- Giddaerappa
- Department
of Chemistry/Industrial Chemistry, Vijayanagara
Sri Krishnadevaraya University, Cantonment, Vinayakanagara, 583105 Ballari, India
| | - Nemakal Manjunatha
- Department
of Chemistry/Industrial Chemistry, Vijayanagara
Sri Krishnadevaraya University, Cantonment, Vinayakanagara, 583105 Ballari, India
| | - Shantharaja
- Department
of Chemistry/Industrial Chemistry, Vijayanagara
Sri Krishnadevaraya University, Cantonment, Vinayakanagara, 583105 Ballari, India
| | - Mirabbos Hojamberdiev
- Institut
für Chemie, Technische Universität
Berlin, Straße des
17. Juni 135, 10623 Berlin, Germany
| | - Lokesh Koodlur Sannegowda
- Department
of Chemistry/Industrial Chemistry, Vijayanagara
Sri Krishnadevaraya University, Cantonment, Vinayakanagara, 583105 Ballari, India
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Nemakal M, Giddaerappa, Shantharaja, Sajjan VA, Koodlur Sannegowda L. Novel amide coupled phthalocyanines: Synthesis and structure-property relationship for electrocatalysis and sensing of hydroquinone. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115657] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chetankumar K, Kumara Swamy BE, Sharma SC, Hariprasad SA. An efficient electrochemical sensing of hazardous catechol and hydroquinone at direct green 6 decorated carbon paste electrode. Sci Rep 2021; 11:15064. [PMID: 34301960 PMCID: PMC8302748 DOI: 10.1038/s41598-021-93749-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 06/02/2021] [Indexed: 11/13/2022] Open
Abstract
In this proposed work, direct green 6 (DG6) decorated carbon paste electrode (CPE) was fabricated for the efficient simultaneous and individual sensing of catechol (CA) and hydroquinone (HY). Electrochemical deeds of the CA and HY were carried out by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) at poly-DG6-modfied carbon paste electrode (Po-DG6-MCPE). Using scanning electron microscopy (SEM) studied the surface property of unmodified CPE (UCPE) and Po-DG6-MCPE. The decorated sensor displayed admirable electrocatalytic performance with fine stability, reproducibility, selectivity, low limit of detection (LLOD) for HY (0.11 μM) and CC (0.09 μM) and sensor process was originated to be adsorption-controlled phenomena. The Po-DG6-MCPE sensor exhibits well separated two peaks for HY and CA in CV and DPV analysis with potential difference of 0.098 V. Subsequently, the sensor was practically applied for the analysis in tap water and it consistent in-between for CA 93.25–100.16% and for HY 97.25–99.87% respectively.
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Affiliation(s)
- K Chetankumar
- Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnanasahyadri, Shankaraghatta, 577451, Shivamogga, Karnataka, India
| | - B E Kumara Swamy
- Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnanasahyadri, Shankaraghatta, 577451, Shivamogga, Karnataka, India.
| | - S C Sharma
- National Assessment and Accreditation Council (NAAC), Naagarabhaavi, Bengaluru, 560072, Karnataka, India. .,Jain University, Bengaluru, 560069, Karnataka, India. .,School of Energy Science and Engineering, Indian Institute of Technology Guwahati, Guwahati, India.
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