1
|
Asif S, Das D, Basu S, Morgan D, Datta A, Sen K. Generating luminescent Graphene quantum Dots from Tryptophan: Fluorosensors for hydrogen peroxide in cancer cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 323:124887. [PMID: 39096676 DOI: 10.1016/j.saa.2024.124887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/25/2024] [Accepted: 07/25/2024] [Indexed: 08/05/2024]
Abstract
Herein, we report a single step synthesis of highly fluorescent Graphene Quantum Dots (GQDs) using tryptophan and glycerol as precursors via pyrolysis. The morphological and functional characterization of the prepared GQDs was performed using PXRD, FTIR, TEM, XPS and zeta potential measurements. The prepared GQDs found their practical application in ultrasensitive detection of an emerging potential cancer biomarker, H2O2, by exploiting the fluorescence quenching behaviour of H2O2. To evaluate the detection sensitivity, a series of various concentrations of H2O2 was spiked to biomatrices like, serum and MCF-7 (human breast cancer cell line) cell lysate medium. A remarkably low limit of detection (LOD) was found in serum medium (139.5 pM) which further improved in MCF-7 cell lysate medium (LOD 61.43 pM). Moreover, the sensing capacity of the GQDs was further validated in presence of various physiological variables such as glucose, cholesterol, insulin and nitrite. Sensing assay was also carried out in HaCaT (human keratinocyte cell line) cell lysate medium to compare the performance of our prepared sensor but the non-linearity of the F0/F versus H2O2 concentration plot pointed towards the conduciveness of the MCF-7 cell lysate medium for sensitive detection of H2O2.The mechanism behind the sensing was also explored using spectroscopic methods.
Collapse
Affiliation(s)
- Seikh Asif
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India
| | - Debashree Das
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India
| | - Shalmali Basu
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India
| | - David Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Aparna Datta
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8, Bidhannagar, Kolkata 700098, India
| | - Kamalika Sen
- Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India.
| |
Collapse
|
2
|
Lins A, Jerônimo AG, Barbosa R, Neves L, Trigueiro P, Almeida LC, Osajima JA, Pereira FA, Peña-Garcia RR. Facile Synthesis of Ni-Doped ZnO Nanoparticles Using Cashew Gum: Investigation of the Structural, Optical, and Photocatalytic Properties. Molecules 2023; 28:7772. [PMID: 38067502 PMCID: PMC10708073 DOI: 10.3390/molecules28237772] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 04/13/2024] Open
Abstract
This work adopted a green synthesis route using cashew tree gum as a mediating agent to obtain Ni-doped ZnO nanoparticles through the sol-gel method. Structural analysis confirmed the formation of the hexagonal wurtzite phase and distortions in the crystal lattice due to the inclusion of Ni cations, which increased the average crystallite size from 61.9 nm to 81.6 nm. These distortions resulted in the growth of point defects in the structure, which influenced the samples' optical properties, causing slight reductions in the band gaps and significant increases in the Urbach energy. The fitting of the photoluminescence spectra confirmed an increase in the concentration of zinc vacancy defects (VZn) and monovacancies (Vo) as Zn cations were replaced by Ni cations in the ZnO structure. The percentage of VZn defects for the pure compound was 11%, increasing to 40% and 47% for the samples doped with 1% and 3% of Ni cations, respectively. In contrast, the highest percentage of VO defects is recorded for the material with the lowest Ni ions concentration, comprising about 60%. The influence of dopant concentration was also reflected in the photocatalytic performance. Among the samples tested, the Zn0.99Ni0.01O compound presented the best result in MB degradation, reaching an efficiency of 98.4%. Thus, the recovered material underwent reuse tests, revealing an efficiency of 98.2% in dye degradation, confirming the stability of the photocatalyst. Furthermore, the use of different inhibitors indicated that •OH radicals are the main ones involved in removing the pollutant. This work is valuable because it presents an ecological synthesis using cashew gum, a natural polysaccharide that has been little explored in the literature.
Collapse
Affiliation(s)
- Alexsandro Lins
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
| | - Aimee G. Jerônimo
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
| | - Ricardo Barbosa
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
| | - Luan Neves
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
| | - Pollyana Trigueiro
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
| | - Luciano C. Almeida
- Departamento de Engenharia Química, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil;
| | - Josy A. Osajima
- Universidade Federal de Piauí, Teresina 64049-550, PI, Brazil;
| | - Francisca A. Pereira
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
- Universidade Federal de Piauí, Teresina 64049-550, PI, Brazil;
| | - Ramón R. Peña-Garcia
- Unidade Acadêmica do Cabo de Santo Agostinho, Programa de Pós-Graduação em Engenharia Física, Universidade Federal Rural de Pernambuco, Cabo de Santo Agostinho 52171-900, PE, Brazil; (A.L.); (A.G.J.); (R.B.); (L.N.); (P.T.); (F.A.P.)
- Universidade Federal de Piauí, Teresina 64049-550, PI, Brazil;
| |
Collapse
|
3
|
Awan SU, Akhtar MT, Hussain D, Shah SA, Rizwan S, Rafique M, Samad A, Arshad M. Defects mediated weak ferromagnetism in Zn 1-yC yO (0.00 ≤ y ≤ 0.10) nanorods semiconductors for spintronics applications. Sci Rep 2023; 13:17080. [PMID: 37816819 PMCID: PMC10564763 DOI: 10.1038/s41598-023-44102-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 10/03/2023] [Indexed: 10/12/2023] Open
Abstract
A series of carbon-doped ZnO [Zn1-yCyO (0.00 ≤ y ≤ 0.10)] nanorods were synthesized using a cost-effective low-temperature (85 °C) dip coating technique. X-ray diffractometer scans of the samples revealed the hexagonal structure of the C-doped ZnO samples, except for y = 0.10. XRD analysis confirmed a decrease in the unit cell volume after doping C into the ZnO matrix, likely due to the incorporation of carbon at oxygen sites (CO defects) resulting from ionic size differences. The morphological analysis confirmed the presence of hexagonal-shaped nanorods. X-ray photoelectron spectroscopy identified C-Zn-C bonding, i.e., CO defects, Zn-O-C bond formation, O-C-O bonding, oxygen vacancies, and sp2-bonded carbon in the C-doped ZnO structure with different compositions. We analyzed the deconvoluted PL visible broadband emission through fitted Gaussian peaks to estimate various defects for electron transition within the bandgap. Raman spectroscopy confirmed the vibrational modes of each constituent. We observed a stronger room-temperature ferromagnetic nature in the y = 0.02 composition with a magnetization of 0.0018 emu/cc, corresponding to the highest CO defects concentration and the lowest measured bandgap (3.00 eV) compared to other samples. Partial density of states analysis demonstrated that magnetism from carbon is dominant due to its p-orbitals. We anticipate that if carbon substitutes oxygen sites in the ZnO structure, the C-2p orbitals become localized and create two holes at each site, leading to enhanced p-p type interactions and strong spin interactions between carbon atoms and carriers. This phenomenon can stabilize the long-range order of room-temperature ferromagnetism properties for spintronic applications.
Collapse
Affiliation(s)
- Saif Ullah Awan
- Department of Electrical Engineering, NUST College of Electrical and Mechanical Engineering (CEME), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan.
| | - M Tanveer Akhtar
- Department of Physics, COMSATS Institute of Information Technology, Islamabad, 44000, Pakistan
| | - Danish Hussain
- Department of Mechatronics Engineering, NUST College of Electrical and Mechanical Engineering, National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Saqlain A Shah
- Department of Physics, Forman Christian College (University), Lahore, Pakistan
| | - Syed Rizwan
- Physics Characterization and Simulations Lab, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan
| | - Mohsin Rafique
- Beijing Academy of Quantum Information Sciences, Beijing, China
| | - Abdus Samad
- Department of Physics, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - M Arshad
- Nanosciences 7 Technology Department, National Centre for Physics, Islamabad, Pakistan
| |
Collapse
|
4
|
Nguyen HT, Pham TN, Le LT, Nguyen TK, Le AT, Huy TQ, Thu Nguyen TT. Complexes of Ag and ZnO nanoparticles with BBR for enhancement of gastrointestinal antibacterial activity through the impacts of size and composition. RSC Adv 2023; 13:6027-6037. [PMID: 36814876 PMCID: PMC9939981 DOI: 10.1039/d3ra00053b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023] Open
Abstract
This study introduces the bioformulations of Ag/BBR and ZnO/BBR complexes against pathogenic bacteria in the gastrointestinal tract. Without the use of toxic reduction agents, Ag and ZnO NPs were prepared using an electrochemical method and then facially mixed with BBR solution to form Ag/BBR and ZnO/BBR complexes. BBR molecules are strongly conjugated with Ag and ZnO NPs through coordinated bonding and electrostatic interaction. As a result, the presence of BBR significantly influenced the nanoparticle growth, resulting in the formation of core/shell structured Ag/BBR and ZnO/BBR NPs with small particle sizes. The antibacterial test showed that BBR, Ag, or ZnO components all contributed to the increase of antibacterial ability of Ag/BBR and ZnO/BBR NPs against both methicillin-resistant Staphylococcus aureus (MRSA) and Salmonella enteritidis (S. enteritidis). The bactericidal ability of Ag/BBR and ZnO/BBR complexes against MRSA was exhibited even at a concentration of four-fold dilution (corresponding to 1.25 g L-1 of BBR and 46.25 mg L-1 of Ag) and two-fold dilution (corresponding to 2.5 g L-1 of BBR and 10 mg L-1 of ZnO), respectively, while that of the Ag/BBR complex against S. enteritidis showed at a concentration of two-fold dilution corresponding to 2.5 g L-1 of BBR and 92.5 mg L-1 of Ag. The results obtained in this study support that Ag/BBR and ZnO/BBR complexes can be potential therapeutic agents against gastrointestinal infections.
Collapse
Affiliation(s)
- Hue Thi Nguyen
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| | - Tuyet Nhung Pham
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| | - Le Thi Le
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| | - Tien Khi Nguyen
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| | - Anh-Tuan Le
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| | - Tran Quang Huy
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| | - Thuy Thi Thu Nguyen
- Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam +84 978960658 +84 924926886
| |
Collapse
|
5
|
Luu TVH, Nguyen QB, Nguyen THC, Pham NC, Duong TL, Le BH, Nguyen VNM, Vu MC, Pham NN, Dao NN, Nguyen TK. One-pot hydrothermal preparation of capsule-like nanocomposites of C/Ce-co-doped ZnO supported on graphene to enhance photodegradation. NEW J CHEM 2023. [DOI: 10.1039/d2nj04937f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Nanocapsule composites of C/Ce-co-doped ZnO supported on graphene synthesized by a one-pot hydrothermal method with a band gap of 2.72 eV were used to enhance the photodegradation of methylene blue under various conditions.
Collapse
Affiliation(s)
- Thi Viet Ha Luu
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, 700000, Vietnam
| | - Quang Bac Nguyen
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thi Ha Chi Nguyen
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Ngoc Chuc Pham
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thi Lim Duong
- Institute of Geography, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Bao Hung Le
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Vietnam – Russian Tropical Centre, 63 Nguyen Van Huyen, Cau Giay, Hanoi 100000, Vietnam
| | - Vu Ngoc Mai Nguyen
- Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh 590000, Vietnam
| | - Minh Chau Vu
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Vietnam – Russian Tropical Centre, 63 Nguyen Van Huyen, Cau Giay, Hanoi 100000, Vietnam
| | - Ngo Nghia Pham
- Institute of Environmental Engineering and Management, University of Witten/Herdecke, Alfred-Herrhausen-Str. 44, 58455 Witten, Germany
- Faculty of Chemistry, VNU University of Science, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam
| | - Ngoc Nhiem Dao
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Trung Kien Nguyen
- Institute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| |
Collapse
|
6
|
Zhang S, Xu W, He P, Chen X, Su L, Ma T, Lu Z. Tafel Analysis Guided Optimization of Zn NP-O-C Catalysts for the Selective 2-Electron Oxygen Reduction Reaction in Neutral Media. J Phys Chem Lett 2022; 13:3409-3416. [PMID: 35404615 DOI: 10.1021/acs.jpclett.2c00526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The lack of characterizations of the adsorption capability toward intermediates during reactions causes difficulties in determining the structural optimization principle of the catalysts for the 2-electron oxygen reduction reaction (2e- ORR). Here, a Tafel-θ method is proposed to evaluate the surface coverage (θ) of important intermediates (*OOH and *OH) on the material surface and further help optimize the catalyst. With the assistance of Tafel-θ analysis, a Zn nanoparticle incorporated oxygen-doped carbon (ZnNP-O-C) catalyst with high 2e- ORR performance (onset of ∼0.57 V and selectivity of >90.4%) in neutral media was achieved. Both the theoretical calculation and characterization results are consistent with the Tafel-θ deduction, revealing that an appropriate ratio of Zn nanoparticles and bridging O can optimize the *OOH adsorption/desorption strength of the adjacent carbon site. This study not only provides an advanced ZnNP-O-C catalyst for electrochemical H2O2 production but also proposes a fast and precise method for the comprehensive assessment of future catalysts.
Collapse
Affiliation(s)
- Sixie Zhang
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Wenwen Xu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Peilei He
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xu Chen
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
| | - Linfeng Su
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
| | - Tengfei Ma
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhiyi Lu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| |
Collapse
|
7
|
Velempini T, Prabakaran E, Pillay K. Photocatalytic reductive applications of C-doped ZrO2/PANI composite towards Cr(VI). J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
8
|
Kumar DR, Ranjith KS, Haldorai Y, Kandasami A, Rajendra Kumar RT. Visible light-assisted degradation of 4-nitrophenol and methylene blue using low energy carbon ion-implanted ZnO nanorod arrays: Effect on mechanistic insights and stability. CHEMOSPHERE 2022; 287:132283. [PMID: 34826942 DOI: 10.1016/j.chemosphere.2021.132283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/11/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
The present investigation demonstrates an enhancement of the visible photocatalytic activities by C ion implantation in ZnO nanorod arrays (NRAs). Vertically aligned ZnO NRAs were prepared by seed layer assisted solution-phase growth and implanted with 70 keV carbon ions at various fluencies: 1E15, 5E15, 1E16, and 3E16 ions/cm2. X-ray diffraction and FESEM results revealed the crystalline 1D ZnO NRAs having a length of ∼3 μm with a diameter in the range of 150-200 nm. C implantation induces the absorption towards the visible region and a substantial decrease in the optical bandgap energy from 3.2 eV to 2.43 eV. The photocatalytic activities (PC) of C ion-implanted ZnO NRAs were investigated through the degradation of 4-Nitrophenol (4-NP) and methylene blue dye (MB) under ambient visible light irradiation. The degradation efficiency of C ion-implanted ZnO NRAs increases compared to the pristine ZnO NRAs from 60.12% to 93.7% and 48.6 to 97.5% for MB and 4-NP, respectively. The synergistic effects of low energy carbon ion-induced bulk and surface interface electronic states facilitate a narrow band of visible light absorption and efficient charge separation to increase the visible-light-driven photocatalytic performance of ZnO NRAs.
Collapse
Affiliation(s)
- Dharman Ranjith Kumar
- Advanced Materials and Devices Laboratory (AMDL), Department of Nanoscience and Technology, Bharathiar University, Coimbatore, India
| | - Kugalur Shanmugam Ranjith
- Department of Energy and Material Engineering, Dongguk University-Seoul, Seoul, 04620, Republic of Korea
| | - Yuvaraj Haldorai
- Advanced Materials and Devices Laboratory (AMDL), Department of Nanoscience and Technology, Bharathiar University, Coimbatore, India
| | - Asokan Kandasami
- Inter University Accelerator Center, Aruna Asaf Ali Marg, New Delhi, 110067, India; Department of Physics & Centre for Interdisciplinary Research, University of Petroleum and Energy Studies (UPES), Dehradun, Uttarakhand, 248007, India
| | | |
Collapse
|
9
|
Ejigu A, Le Fevre LW, Dryfe RAW. Reversible Electrochemical Energy Storage Based on Zinc-Halide Chemistry. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14112-14121. [PMID: 33724772 PMCID: PMC8041251 DOI: 10.1021/acsami.0c20622] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/23/2021] [Indexed: 05/23/2023]
Abstract
The development of rechargeable Zinc-ion batteries (ZIBs) has been hindered by the lack of efficient cathode materials due to the strong binding of divalent zinc ions with the host lattice. Herein, we report a strategy that eliminates the participation of Zn2+ within the cathode chemistry. The approach involves the use of composite cathode materials that contain Zn halides (ZnCl2, ZnBr2, and ZnI2) and carbon (graphite or activated carbon), where the halide ions act both as charge carriers and redox centers while using a Zn2+-conducting water-in-salt gel electrolyte. The use of graphite in the composite electrode produced batterylike behavior, where the voltage plateau was related to the standard potential of the halogen species. When activated carbon was used in the composite, however, the cell acted as a hybrid Zn-ion capacitor due to the fast, reversible halide ion electrosorption/desorption in the carbon pores. The ZnX2-activated carbon composite delivers a capacity of over 400 mAh g-1 and cell energy density of 140 Wh kg-1 while retaining over 95% of its capacity after 500 cycles. The halogen reaction mechanism has been elucidated using combinations of electrochemical and in situ spectroscopic techniques.
Collapse
Affiliation(s)
- Andinet Ejigu
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Lewis W. Le Fevre
- National
Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Department
of Electrical and Electronic Engineering, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Robert A. W. Dryfe
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Henry
Royce Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| |
Collapse
|
10
|
Biomass-derived active Carbon@ZnO/SnO2 novel visible-light photocatalyst for rapid degradation of linezolid antibiotic and imidacloprid insecticide. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.03.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|