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Han D, Yang K, Chen L, Zhang Z, Wang C, Yan H, Wen J. Facile preparation of high-efficiency peroxidase mimics: modulation of the catalytic microenvironment of LDH nanozymes through defect engineering induced by amino acid intercalation. Chem Sci 2024; 15:6002-6011. [PMID: 38665520 PMCID: PMC11040636 DOI: 10.1039/d4sc00469h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 03/15/2024] [Indexed: 04/28/2024] Open
Abstract
Nanozymes have gained much attention as a replacement for natural enzymes duo to their unique advantages. Two-dimensional layered double hydroxide (LDH) nanomaterials with high physicochemical plasticity are emerging as the main forces for the construction of nanozymes. Unfortunately, high-performance LDH nanozymes are still scarce. Recently, defects in nanomaterials have been verified to play a significant role in modulating the catalytic microenvironment, thereby improving catalytic performances of nanozymes. Therefore, the marriage between defect engineering and LDH nanozymes is expected to spark new possibilities. In this work, twenty kinds of natural amino acids were separately inserted into the interlayer of CoFe-LDH to obtain defect-rich CoFe-LDH nanozymes. The peroxidase (POD)-like activity and catalytic mechanism of the as-prepared LDH nanozymes were systematically studied. The results showed that the intercalation of amino acids can effectively enhance the POD-like activity of LDH nanozymes owing to the increasing oxygen/metal vacancies. And l-cysteine intercalated LDH exhibited the highest catalytic activity ascribed to its thiol group. As a proof of concept, LDH nanozymes with superb POD-like activity were used in biosensing and antibacterial applications. This work suggests that modulating the catalytic microenvironment through defect engineering is an effective way to obtain high-efficiency POD mimics.
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Affiliation(s)
- Dong Han
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Pharmaceutical Science, Hebei University Baoding 071002 P. R. China
| | - Kui Yang
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, College of Chemistry and Materials Science, Hebei University Baoding 071002 P. R. China
| | - Lanlan Chen
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Pharmaceutical Science, Hebei University Baoding 071002 P. R. China
| | - Zhaosheng Zhang
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, College of Chemistry and Materials Science, Hebei University Baoding 071002 P. R. China
| | - Chen Wang
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Pharmaceutical Science, Hebei University Baoding 071002 P. R. China
| | - Hongyuan Yan
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, College of Chemistry and Materials Science, Hebei University Baoding 071002 P. R. China
| | - Jia Wen
- State Key Laboratory of New Pharmaceutical Preparations and Excipients, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Pharmaceutical Science, Hebei University Baoding 071002 P. R. China
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George G, Ealias AM, Saravanakumar MP. Advancements in textile dye removal: a critical review of layered double hydroxides and clay minerals as efficient adsorbents. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:12748-12779. [PMID: 38265587 DOI: 10.1007/s11356-024-32021-w] [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: 09/26/2023] [Accepted: 01/11/2024] [Indexed: 01/25/2024]
Abstract
The textile industry is responsible for producing large volumes of wastewater that contain a wide variety of dye compounds. This poses a significant environmental hazard and risks harming both ecosystems and living organisms. This review study explores the advancements in adsorption research for dye removal, with a particular emphasis on the development of various adsorbents. The article provides detailed insights into the toxicity and classification of dyes, different treatment techniques, and the characteristics of numerous adsorbents, with special attention to layered double hydroxides (LDH) and clay minerals. A comprehensive list of adsorbents, encompassing natural materials, agricultural by-products, industrial waste, and activated carbon, is discussed for effective removal of different dyes. Furthermore, the review extensively examines the influence of various adsorption variables, such as pH, initial dye concentration, adsorbent dosage, temperature, contact time, ionic strength, and pore volume of the adsorbent. Additionally, the application of response surface methodology for optimizing adsorption variables is elucidated. Commonly, electrostatic attraction, π-π interactions, n-π interactions, van der Waals forces, H-bonding, and pore diffusion play a major role in adsorption mechanism. The review also found that LDH can eliminate a wide range of dyes from wastewater, achieving excellent uptake capacities often exceeding 500 mg/g, with a removal efficiency of 99%. The Langmuir isotherm and pseudo-second-order kinetic equations gave the best fit to most of the adsorption data. Overall, this review serves as a valuable resource for researchers and practitioners seeking sustainable solutions to address the environmental challenges posed by textile dye contamination.
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Affiliation(s)
- Giphin George
- Department of Mechanical Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, A.P., Green Fields, 522302, India.
| | - Anu Mary Ealias
- Department of Civil Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, A.P., Green Fields, 522302, India
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Mahgoub SM, Shehata MR, Zaher A, Abo El-Ela FI, Farghali A, Amin RM, Mahmoud R. Cellulose-based activated carbon/layered double hydroxide for efficient removal of Clarithromycin residues and efficient role in the treatment of stomach ulcers and acidity problems. Int J Biol Macromol 2022; 215:705-728. [DOI: 10.1016/j.ijbiomac.2022.06.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/08/2022] [Accepted: 06/20/2022] [Indexed: 11/05/2022]
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4
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Yilmaz AK, Hilal Gubbuk I. Synthesis and Characterization of Ag/Montmorillonite Clay Nanocomposite for Chemical Catalytic Degradation of Azo Pollutants. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422040033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Photoelectrocatalytic Degradation of Congo Red Dye with Activated Hydrotalcites and Copper Anode. Catalysts 2021. [DOI: 10.3390/catal11020211] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Photoelectrocatalysis is a novel technique that combines heterogeneous photocatalysis with the application of an electric field to the system through electrodes for the degradation of organic contaminants in aqueous systems, mainly of toxic dyes. The efficiency of these combined processes depends on the semiconductor properties of the catalysts, as well as on the anodic capacity of the electrode. In this study, we propose the use of active hydrotalcites in the degradation of Congo red dye through processes assisted by ultraviolet (UV) irradiation and electric current. Our research focused on evaluating the degradation capacity of Congo red by means of photolysis, catalysis, photocatalysis, electrocatalysis, and photoelectrocatalysis, as well as identifying the effect of the properties of the active hydrotalcites in these processes. The results show that a maximum degradation was reached with the photoelectrocatalysis process with active hydrotalcites and a copper anode at 6 h with 95% in a half-life of 0.36 h. The degradation is favored by the attack of the OH• radicals under double bonds in the diazo groups where the electrode produces Cu2+ ions, and with the photogenerated electrons, the recombination speed of the electron–hole in the hydrotalcite catalyst is reduced until the complete degradation.
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6
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Iqbal J, Shah NS, Sayed M, Niazi NK, Imran M, Khan JA, Khan ZUH, Hussien AGS, Polychronopoulou K, Howari F. Nano-zerovalent manganese/biochar composite for the adsorptive and oxidative removal of Congo-red dye from aqueous solutions. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123854. [PMID: 33264930 DOI: 10.1016/j.jhazmat.2020.123854] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 08/12/2020] [Accepted: 08/24/2020] [Indexed: 05/27/2023]
Abstract
Congo-red (CR), a precursor of textile products and a contaminant of great concern, has contaminated aquatic environments. Here, we explored the synthesis of mesoporous nano-zerovalent manganese (nZVMn) and Phoenix dactylifera leaves biochar (PBC) composite for the removal of CR from water. The nZVMn/PBC adsorbed 117.647 mg/g of CR versus 25.316 mg/g by PBC at [CR]0 = 20 mg/L and [PBC]0 = [nZVMn/PBC]0 = 500 mg/L. Variation of [nZVMn/PBC]0, [CR]0 and pH influenced the adsorption of CR. Freundlich adsorption isotherm and pseudo-first-order kinetic models best fitted CR adsorption. The H2O2 coupling with nZVMn/PBC promoted removal of CR possibly due to the formation of hydroxyl radical (●OH) and caused 95 % removal of CR versus 77 % by nZVMn/PBC alone. The ●OH scavengers inhibited the removal of CR. The nZVMn/PBC showed a good reusability and efficient removal of CR up to the seventh cycle of treatment. Results reveal that nZVMn improved performance, thermal stability and reusability of biochar. Degradation products from ●OH-mediated degradation of CR were studied by ultraperformance liquid chromatography with mass spectrometric detector to establish degradation pathways. The ion-chromatographic analysis showed the formation of non-toxic inorganic acetate product, which suggests high potential of the newly fabricated adsorbent in the removal of CR.
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Affiliation(s)
- Jibran Iqbal
- College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates.
| | - Noor S Shah
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus 61100, Pakistan.
| | - Murtaza Sayed
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan
| | - Nabeel Khan Niazi
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan; School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba 4350 Queensland, Australia
| | - Muhammad Imran
- College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates
| | - Javed Ali Khan
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar 25120, Pakistan
| | - Zia Ul Haq Khan
- College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates
| | - Aseel Gamal Suliman Hussien
- Department of Mechanical Engineering, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box: 127788, United Arab Emirates
| | - Kyriaki Polychronopoulou
- Department of Mechanical Engineering, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box: 127788, United Arab Emirates; Center for Catalysis and Separation, Khalifa University of Science and Technology, Abu Dhabi, P.O. Box: 127788, United Arab Emirates
| | - Fares Howari
- College of Natural and Health Sciences, Zayed University, P.O. Box 144534, Abu Dhabi, United Arab Emirates
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Barakat M, Kumar R, Lima EC, Seliem MK. Facile synthesis of muscovite–supported Fe3O4 nanoparticles as an adsorbent and heterogeneous catalyst for effective removal of methyl orange: Characterisation, modelling, and mechanism. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.01.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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8
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Fazal H, Iqbal A, Cao Y, Zai J, Ali N, Zhang Y, Wu X, Zhang X, Qian X. Porous urchin-like 3D Co(ii)Co(iii) layered double hydroxides for high performance heterogeneous Fenton degradation. CrystEngComm 2021. [DOI: 10.1039/d0ce01555e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterogeneous Fenton processes can overcome the generation of iron sludge and the production of more solid wastes.
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Affiliation(s)
- Hira Fazal
- School of Chemistry and Chemical Engineering
- and State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
- P.R. China
| | - Asma Iqbal
- School of Chemistry and Chemical Engineering
- and State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
- P.R. China
| | - Yucai Cao
- State Key Laboratory of Polyolefins and Catalysis
- Shanghai Key Laboratory of Catalysis Technology for Polyolefins (Shanghai Research Institute of Chemical Industry Co., Ltd., Shanghai)
- P.R. China
| | - Jiantao Zai
- School of Chemistry and Chemical Engineering
- and State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
- P.R. China
| | - Nazakat Ali
- School of Chemistry and Chemical Engineering
- and State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
- P.R. China
| | - Yuchi Zhang
- School of Chemistry and Chemical Engineering
- and State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
- P.R. China
| | - Xiangyang Wu
- State Key Laboratory of Polyolefins and Catalysis
- Shanghai Key Laboratory of Catalysis Technology for Polyolefins (Shanghai Research Institute of Chemical Industry Co., Ltd., Shanghai)
- P.R. China
| | - Xiwang Zhang
- Department of Chemical Engineering
- Monash University
- Clayton
- Australia
| | - Xuefeng Qian
- School of Chemistry and Chemical Engineering
- and State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- Shanghai
- P.R. China
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Bhuvaneswari K, Palanisamy G, Pazhanivel T, Maiyalagan T. r-GO supported g-C3N4 /NiMgAl layered triple hydroxide hybrid as a Visible Light photocatalyst for organic dye removal. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Xue T, Li R, Zhang Z, Gao Y, Wang Q. Preparation of MnO 2 decorated Co 3Fe 1O x powder/monolithic catalyst with improved catalytic activity for toluene oxidation. J Environ Sci (China) 2020; 96:194-203. [PMID: 32819694 DOI: 10.1016/j.jes.2020.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/30/2020] [Accepted: 05/03/2020] [Indexed: 06/11/2023]
Abstract
In this paper, KMnO4 was used to pre-treat Co3Fe-layered double hydroxides (LDH) precursor to prepare MnO2 decorated Co3Fe1Ox catalyst. The toluene oxidation performance of the catalyst was investigated systematically. The optimized 0.1MnCF-LDO catalyst exhibited the best catalytic performance, and the temperatures of 50% and 90% toluene conversion (T50 and T90) were 218 and 243°C, respectively. The apparent activation energy (Ea) was 31.6 kJ/mol. The characterization results showed that the pre-redox reaction by KMnO4 could increase the specific surface area, Co3+ species amount and oxygen defect concentration of the catalyst, which are the main reason of the improved toluene catalytic activity. Besides, this method was also applied to enhance toluene oxidation of iron mesh based monolithic catalyst. The 0.1MnCF-LDO/Iron mesh (IM) catalyst showed a 90% toluene conversion at around 316°C which was much lower than that of without MnO2 addition (359°C). In addition, the water resistant of all the catalysts was studied as well, all the samples showed relatively good water resistance. The toluene conversion still remained to be over >80% even in the presence of 10 vol.% water vapor.
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Affiliation(s)
- Tianshan Xue
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Renna Li
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Zhang Zhang
- Beijing Municipal Environmental Monitoring Center, Beijing 100048, China
| | - Yanshan Gao
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Qiang Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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11
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Sirajudheen P, Meenakshi S. Encapsulation of Zn–Fe layered double hydroxide on activated carbon and its litheness in tuning anionic and rhoda dyes through adsorption mechanism. ASIA-PAC J CHEM ENG 2020. [DOI: 10.1002/apj.2479] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- P. Sirajudheen
- Department of Chemistry The Gandhigram Rural Institute—Deemed to be University Dindigul India
- Department of Chemistry Pocker Sahib Memorial Orphanage College Malappuram India
| | - S. Meenakshi
- Department of Chemistry The Gandhigram Rural Institute—Deemed to be University Dindigul India
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12
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The application of modified layered double hydroxides in selective catalytic reduction of nitrogen oxides by ammonia (NH3-SCR). POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2020. [DOI: 10.2478/pjct-2020-0009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract
Selective catalytic reduction with ammonia (NH3-SCR) is very efficient DeNOx technique. According to some problems with the commercial catalyst, novel one should be prepared. Hydrotalcites are potential precursors of the new catalysts of NH3-SCR. In this paper, several attempts to apply these materials in NH3-SCR are presented.
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Kumar V, Pandey N, Dharmadhikari S, Ghosh P. Degradation of mixed dye via heterogeneous Fenton process: Studies of calcination, toxicity evaluation, and kinetics. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2020; 92:211-221. [PMID: 31373072 DOI: 10.1002/wer.1192] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/19/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
In this study, the degradation of mixed dye (mixture of Azure B and Congo red) was investigated using iron-loaded black soil as a catalyst via Fenton process. Iron-loaded black soil catalyst was prepared by the wet impregnation method, calcined at different temperatures with varying of iron loading on black soil. Their behavior was compared through characterization techniques (FTIR and XRD). Separately, the effect of calcination and aging of catalyst was investigated on the degradation of mixed dye with optimized conditions. Significant degradation (>90% only in 10 min) was observed in optimum conditions. Toxicity measurement was done by a seed germination test which gave significant results. In the kinetic study, it was found that Behnajady-Modirshahla-Ghanbery (BMG) model was the best suited for this process compared to other models. In addition, thermodynamic properties (Gibbs free energy [∆G], activation energy [Ea ], activation enthalpy [∆H], and activation entropy [∆S]) were also calculated. The stability of synthesized catalyst was found to be satisfactory. PRACTITIONER POINTS: Application of Iron-loaded black soil catalyst Mixed dye degradation and toxicity measurement Thermodynamic property studies.
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Affiliation(s)
| | - Neha Pandey
- Department of Chemical Engineering, NIT, Raipur, India
| | | | - Prabir Ghosh
- Department of Chemical Engineering, NIT, Raipur, India
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Shao B, Pang W, Tan XQ, Tang C, Deng Y, Huang D, Huang J. Rapid growth of amorphous cobalt-iron oxyhydroxide nanosheet arrays onto iron foam: Highly efficient and low-cost catalysts for oxygen evolution. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2019.113621] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Mesoporous iron gallate nanocomplex for adsorption and degradation of organic dyes. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Daud M, Hai A, Banat F, Wazir MB, Habib M, Bharath G, Al-Harthi MA. A review on the recent advances, challenges and future aspect of layered double hydroxides (LDH) – Containing hybrids as promising adsorbents for dyes removal. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.110989] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Functionalized Mn(II)-MOF based on host-guest interaction for selective and rapid capture of Congo red from water. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2018.12.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Rajeshkhanna G, Singh TI, Kim NH, Lee JH. Remarkable Bifunctional Oxygen and Hydrogen Evolution Electrocatalytic Activities with Trace-Level Fe Doping in Ni- and Co-Layered Double Hydroxides for Overall Water-Splitting. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42453-42468. [PMID: 30430830 DOI: 10.1021/acsami.8b16425] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Large-scale H2 production from water by electrochemical water-splitting is mainly limited by the sluggish kinetics of the nonprecious-based anode catalysts for oxygen evolution reaction (OER). Here, we report layer-by-layer in situ growth of low-level Fe-doped Ni-layered double hydroxide (Ni1- xFe x-LDH) and Co-layered double hydroxide (Co1- xFe x-LDH), respectively, with three-dimensional microflower and one-dimensional nanopaddy-like morphologies on Ni foam, by a one-step eco-friendly hydrothermal route. In this work, an interesting finding is that both Ni1- xFe x-LDH and Co1- xFe x-LDH materials are very active and efficient for OER as well as hydrogen evolution reaction (HER) catalytic activities in alkaline medium. The electrochemical studies demonstrate that Co1- xFe x-LDH material exhibits very low OER and HER overpotentials of 249 and 273 mV, respectively, at a high current density of 50 mA cm-2, whereas Ni1- xFe x-LDH exhibits 297 and 319 mV. To study the overall water-splitting performance using these electrocatalysts as anode and cathode, three types of alkaline electrolyzers are fabricated, namely, Co1- xFe x-LDH(+)∥Co1- xFe x-LDH(-), Ni1- xFe x-LDH(+)∥Ni1- xFe x-LDH(-), and Co1- xFe x-LDH(+)∥Ni1- xFe x-LDH(-). These electrolyzers require only a cell potential ( Ecell) of 1.60, 1.60, and 1.59 V, respectively, to drive the benchmark current density of 10 mA cm-2. Another interesting finding is that their catalytic activities are enhanced after stability tests. Systematic analyses are carried out on both electrodes after all electrocatalytic activity studies. The developed three types of electrolyzers to produce H2, are very efficient, cost-effective, and offer no complications in synthesis of materials and fabrication of electrolyzers, which can greatly enable the realization of clean renewable energy infrastructure.
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Rajeshkhanna G, Kandula S, Shrestha KR, Kim NH, Lee JH. A New Class of Zn 1 -x Fe x -Oxyselenide and Zn 1- x Fe x -LDH Nanostructured Material with Remarkable Bifunctional Oxygen and Hydrogen Evolution Electrocatalytic Activities for Overall Water Splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803638. [PMID: 30444578 DOI: 10.1002/smll.201803638] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/26/2018] [Indexed: 06/09/2023]
Abstract
The scalable and cost-effective H2 fuel production via electrolysis demands an efficient earth-abundant oxygen and hydrogen evolution reaction (OER, and HER, respectively) catalysts. In this work, for the first time, the synthesis of a sheet-like Zn1- x Fex -oxyselenide and Zn1- x Fex -LDH on Ni-foam is reported. The hydrothermally synthesized Zn1- x Fex -LDH/Ni-foam is successfully converted into Zn1- x Fex -oxyselenide/Ni-foam through an ethylene glycol-assisted solvothermal method. The anionic regulation of electrocatalysts modulates the electronic properties, and thereby augments the electrocatalytic activities. The as-prepared Zn1- x Fex -LDH/Ni-foam shows very low OER and HER overpotentials of 263 mV at a current density of 20 mA cm-2 and 221 mV at 10 mA cm-2 , respectively. Interestingly, this OER overpotential is decreased to 256 mV after selenization and the HER overpotential of Zn1- x Fex -oxyselenide/Ni-foam is decreased from 238 to 202 mV at 10 mA cm-2 after a stability test. Thus, the Zn1- x Fex -oxyselenide/Ni-foam shows superior bifunctional catalytic activities and excellent durability at a very high current density of 50 mA cm-2 . More importantly, when the Zn1- x Fex -oxyselenide/Ni-foam is used as the anode and cathode in an electrolyzer for overall water splitting, Zn1- x Fex -oxyselenide/Ni-foam(+)ǁZn1- x Fex -oxyselenide/Ni-foam(-) shows an appealing potential of 1.62 V at 10 mA cm-2 . The anionic doping/substitution methodology is new and serves as an effective strategy to develop highly efficient bifunctional electrocatalysts.
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Affiliation(s)
- Gaddam Rajeshkhanna
- Advanced Materials Institute for BIN Convergence Technology (BK21 plus Global Program), Department of BIN Convergence Technology, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Syam Kandula
- Advanced Materials Institute for BIN Convergence Technology (BK21 plus Global Program), Department of BIN Convergence Technology, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Khem Raj Shrestha
- Advanced Materials Institute for BIN Convergence Technology (BK21 plus Global Program), Department of BIN Convergence Technology, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Nam Hoon Kim
- Advanced Materials Institute for BIN Convergence Technology (BK21 plus Global Program), Department of BIN Convergence Technology, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Joong Hee Lee
- Advanced Materials Institute for BIN Convergence Technology (BK21 plus Global Program), Department of BIN Convergence Technology, Chonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
- Carbon Composite Research Centre, Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk, 54896, Republic of Korea
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Heterogeneous Fenton degradation of azo dye 4BS over Co–Mn–Fe ternary hydrotalcites. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0489-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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