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Ashok A, Kumar A, Matin MA, Tarlochan F. Synthesis of Highly Efficient Bifunctional Ag/Co 3O 4 Catalyst for Oxygen Reduction and Oxygen Evolution Reactions in Alkaline Medium. ACS OMEGA 2018; 3:7745-7756. [PMID: 31458922 PMCID: PMC6644694 DOI: 10.1021/acsomega.8b00799] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 06/28/2018] [Indexed: 06/10/2023]
Abstract
Ag/Co3O4 catalysts using three different modes of solution combustion synthesis were developed and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy to identify crystallite size, oxidation state, composition, and morphology. Cyclic voltammetry and linear sweep voltammetry measurements for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) confirm the bifunctionality of the electrocatalysts. The electrochemical evaluation indicates that a synergic effect between Ag and Co enhances the activity through the fast breaking of O-O bond in the molecular oxygen to enhance the reduction mechanism. The high content of cobalt (Co) in the catalyst Ag/Co3O4-12, synthesized by second wave combustion, improves the activity for ORR, and the reaction mechanism follows a 3.9 number of electron transfer in overall reaction. The kinetic and limiting current densities of Ag/Co3O4-12 are maximum when compared to those of other Ag/Co3O4 catalysts and are very close to commercial Pt/C. Moreover, the maximum current density of OER for Ag/Co3O4-12 makes it a promising candidate for various bifunctional electrocatalytic applications such as fuel cells and metal-air batteries.
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Affiliation(s)
- Anchu Ashok
- Department of Mechanical and Industrial Engineering and Department of
Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Anand Kumar
- Department of Mechanical and Industrial Engineering and Department of
Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Md Abdul Matin
- Department of Mechanical and Industrial Engineering and Department of
Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Faris Tarlochan
- Department of Mechanical and Industrial Engineering and Department of
Chemical Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
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253
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Pt-Co and Pt-Ni Catalysts of Low Metal Content for H2 Production by Reforming of Oxygenated Hydrocarbons and Comparison with Reported Pt-Based Catalysts. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2018. [DOI: 10.1155/2018/4972070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
New catalysts of Pt, PtNi, PtCo, and NiCo supported on Al2O3 were developed for producing hydrogen by aqueous phase reforming (APR) of oxygenated hydrocarbons. The urea matrix combustion technique was used for loading the metal on the support in order to improve several aspects: increase both the metal-support interaction and the metal dispersion and decrease the metal load. The catalysts were characterized by MS/ICP, N2 adsorption, XRD, TPR, CO chemisorption, and the test of cyclohexane dehydrogenation (CHD). The APR of a solution of 10% mass ethylene glycol (EG), performed in a tubular fixed bed reactor at 498 K, 22 bar, WHSV = 2.3 h−1, was used as the main reaction test. After 10 h on-stream, the catalysts prepared by UMC had better hydrogen yield and catalytic stability than common catalysts prepared by IWI. The UMC/IWI H2 yield ratio was 23.5/15.2 for Pt, 24.0/17.0 for PtCo, 26.6/21.0 for PtNi, and 8.0/3.9 for NiCo. Ni or Co addition to Pt increased the carbon conversion while keeping the H2 turnover high. Cobalt also improves stability. Reports of several authors were revised for a comparison. The analysis indicated that the developed catalysts are a viable and cheaper alternative for H2 production from a renewable resource.
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254
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Two-dimensional Mixed Phase Leaf-Ti1-xCuxO2Sheets Synthesized Based on a Natural Leaf Template for Increased Photocatalytic H2Evolution. ChemCatChem 2018. [DOI: 10.1002/cctc.201800814] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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255
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Ortiz-Quiñonez JL, Pal U, Villanueva MS. Effects of Oxidizing/Reducing Agent Ratio on Phase Purity, Crystallinity, and Magnetic Behavior of Solution-Combustion-Grown BiFeO 3 Submicroparticles. Inorg Chem 2018; 57:6152-6160. [PMID: 29746118 DOI: 10.1021/acs.inorgchem.8b00755] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fabrication of phase-pure well-crystalline BiFeO3 submicroparticles in large scale is of great importance for the utilization of this rhombohedrally distorted perovskite material in applications such as memory storage and spintronic devices and visible photocatalyst for the degradation of organic pollutants. In fact, because of the narrow temperature range of phase stabilization, the fabrication of phase-pure BiFeO3 in large scale remained elusive. We present the synthesis of phase-pure BiFeO3 particles of submicrometric dimensions (246-330 nm average size) through the adjustment of oxidizing/reducing agent ratio in solution combustion process utilizing glycine as reducing agent and nitrate precursors as oxidizing agent. Utilizing X-ray diffraction and Raman spectroscopy, we demonstrate that the BiFeO3 submicroparticles synthesized at equivalence ratio (Φe) close to 0.5 do not contain undesired impurities such as Bi2Fe4O9 and Bi24Fe2O39. Moreover, the submicroparticles are highly crystalline, possessing high room temperature magnetic moment and stable antiferromagnetic behavior across a wide temperature range. The superparamagnetic behavior at low magnetic field manifested by impurities attached to the BiFeO3 submicroparticles might lead to their use as effective magnetically separable photocatalysts.
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Affiliation(s)
- José-Luis Ortiz-Quiñonez
- Facultad de Ingeniería , Benemérita Universidad Autónoma de Puebla , Apartado Postal J-39 , 72570 Puebla , Puebla , Mexico
| | - Umapada Pal
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , Apartado Postal J-48 , 72570 Puebla , Puebla , Mexico
| | - Martin Salazar Villanueva
- Facultad de Ingeniería , Benemérita Universidad Autónoma de Puebla , Apartado Postal J-39 , 72570 Puebla , Puebla , Mexico
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256
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Rapid synthesis of interconnected CuCrO 2 nanostructures: A promising electrode material for photoelectrochemical fuel generation. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.185] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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257
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Meng F, Li X, Shaw GM, Smith PJ, Morgan DJ, Perdjon M, Li Z. Sacrificial Carbon Strategy toward Enhancement of Slurry Methanation Activity and Stability over Ni-Zr/SiO2 Catalyst. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b05157] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fanhui Meng
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Xin Li
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Greg M. Shaw
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Paul J. Smith
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - David J. Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Michal Perdjon
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Zhong Li
- Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
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258
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Khort A, Podbolotov K, Serrano-García R, Gun’ko Y. One-Step Solution Combustion Synthesis of Cobalt Nanopowder in Air Atmosphere: The Fuel Effect. Inorg Chem 2018; 57:1464-1473. [DOI: 10.1021/acs.inorgchem.7b02848] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | - Kirill Podbolotov
- Department
of Glass and Ceramic Technologies, Belarusian State Technological University, Minsk 220006, Belarus
| | | | - Yurii Gun’ko
- Trinity College Dublin, Dublin 2, Ireland
- ITMO University, St. Petersburg 197101, Russia
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259
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Singh L, Lee J, Kim GW, Ji M, Moon C, Lee H, Ha JW, Lee Y. A simple, rapid and efficient flame synthesis of ultrafine LiNi0.95−xCoxTi0.05O2 (x = 0.25 and 0.30): a versatile route to synthesize Ni-rich cathode materials for Li-ion batteries. NEW J CHEM 2018. [DOI: 10.1039/c7nj02679j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple, rapid, and efficient flame synthesis method was developed to fabricate LiNi0.95−xCoxTi0.05O2 (x = 0.25 and 0.30) cathode materials for Li-ion batteries.
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Affiliation(s)
- Laxman Singh
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Jiwon Lee
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Geun Wan Kim
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Minsoo Ji
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Chaewon Moon
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Hansol Lee
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Ji Won Ha
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Youngil Lee
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
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260
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Goto Y, Morikawa A, Iwasaki M, Miura M, Tanabe T. Enhanced oxygen storage capacity of cation-ordered cerium–zirconium oxide induced by titanium substitution. Chem Commun (Camb) 2018; 54:3528-3531. [DOI: 10.1039/c8cc01308j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cation-ordered Ce0.5Zr0.4Ti0.1O2 with a high oxygen storage capacity (1310 μmol-O per g at 200 °C) was synthesized via a solution combustion method.
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261
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Parametric Optimisation of Solution Combustion Synthesis Catalysts and Their Application for the Aqueous Hydrogenation of Maleic Acid. Catal Letters 2017. [DOI: 10.1007/s10562-017-2279-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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262
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Roiban L, Koneti S, Morfin F, Nguyen TS, Mascunan P, Aouine M, Epicier T, Piccolo L. Uncovering the 3 D Structure of Combustion-Synthesized Noble Metal-Ceria Nanocatalysts. ChemCatChem 2017. [DOI: 10.1002/cctc.201701474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lucian Roiban
- Univ Lyon, INSA Lyon, Université Claude Bernard-Lyon 1; CNRS, MATEIS-UMR 5510, Bât. Blaise Pascal; 7 Avenue Jean Capelle F-69621 Villeurbanne Cedex France
| | - Siddardha Koneti
- Univ Lyon, INSA Lyon, Université Claude Bernard-Lyon 1; CNRS, MATEIS-UMR 5510, Bât. Blaise Pascal; 7 Avenue Jean Capelle F-69621 Villeurbanne Cedex France
| | - Franck Morfin
- Univ Lyon, Université Claude Bernard-Lyon 1; CNRS, Ircelyon-UMR 5256; 2 Avenue Albert Einstein F-69626 Villeurbanne Cedex France
| | - Thanh-Son Nguyen
- Univ Lyon, Université Claude Bernard-Lyon 1; CNRS, Ircelyon-UMR 5256; 2 Avenue Albert Einstein F-69626 Villeurbanne Cedex France
| | - Pascale Mascunan
- Univ Lyon, Université Claude Bernard-Lyon 1; CNRS, Ircelyon-UMR 5256; 2 Avenue Albert Einstein F-69626 Villeurbanne Cedex France
| | - Mimoun Aouine
- Univ Lyon, Université Claude Bernard-Lyon 1; CNRS, Ircelyon-UMR 5256; 2 Avenue Albert Einstein F-69626 Villeurbanne Cedex France
| | - Thierry Epicier
- Univ Lyon, INSA Lyon, Université Claude Bernard-Lyon 1; CNRS, MATEIS-UMR 5510, Bât. Blaise Pascal; 7 Avenue Jean Capelle F-69621 Villeurbanne Cedex France
| | - Laurent Piccolo
- Univ Lyon, Université Claude Bernard-Lyon 1; CNRS, Ircelyon-UMR 5256; 2 Avenue Albert Einstein F-69626 Villeurbanne Cedex France
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263
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Li X, Elshahawy AM, Guan C, Wang J. Metal Phosphides and Phosphates-based Electrodes for Electrochemical Supercapacitors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701530. [PMID: 28834280 DOI: 10.1002/smll.201701530] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/10/2017] [Indexed: 05/26/2023]
Abstract
Phosphorus compounds, such as metal phosphides and phosphates have shown excellent performances and great potential in electrochemical energy storage, which are demonstrated by research works published in recent years. Some of these metal phosphides and phosphates and their hybrids compare favorably with transition metal oxides/hydroxides, which have been studied extensively as a class of electrode materials for supercapacitor applications, where they have limitations in terms of electrical and ion conductivity and device stability. To be specific, metal phosphides have both metalloid characteristics and good electric conductivity. For metal phosphates, the open-framework structures with large channels and cavities endow them with good ion conductivity and charge storage capacity. In this review, we present the recent progress on metal phosphides and phosphates, by focusing on their advantages/disadvantages and potential applications as a new class of electrode materials in supercapacitors. The synthesis methods to prepare these metal phosphides/phosphates are looked into, together with the scientific insights involved, as they strongly affect the electrochemical energy storage performance. Particular attentions are paid to those hybrid-type materials, where strong synergistic effects exist. In the summary, the future perspectives and challenges for the metal phosphides, phosphates and hybrid-types are proposed and discussed.
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Affiliation(s)
- Xin Li
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 117546, Singapore
| | - Abdelnaby M Elshahawy
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
| | - John Wang
- Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore
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264
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Voskanyan AA, Li CYV, Chan KY. Catalytic Palladium Film Deposited by Scalable Low-Temperature Aqueous Combustion. ACS APPLIED MATERIALS & INTERFACES 2017; 9:33298-33307. [PMID: 28872836 DOI: 10.1021/acsami.7b10042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This article describes a novel method for depositing a dense, high quality palladium thin film via a one-step aqueous combustion process which can be easily scaled up. Film deposition of Pd from aqueous solutions by conventional chemical or electrochemical methods is inhibited by hydrogen embrittlement, thus resulting in a brittle palladium film. The method outlined in this work allows a direct aqueous solution deposition of a mirror-bright, durable Pd film on substrates including glass and glassy carbon. This simple procedure has many advantages including a very high deposition rate (>10 cm2 min-1) and a relatively low deposition temperature (250 °C), which makes it suitable for large-scale industrial applications. Although preparation of various high-quality oxide films has been successfully accomplished via solution combustion synthesis (SCS) before, this article presents the first report on direct SCS production of a metallic film. The mechanism of Pd film formation is discussed with the identification of a complex formed between palladium nitrate and glycine at low temperature. The catalytic properties and stability of films are successfully tested in alcohol electrooxidation and electrochemical oxygen reduction reaction. It was observed that combustion deposited Pd film on a glassy carbon electrode showed excellent catalytic activity in ethanol oxidation without using any binder or additive. We also report for the first time the concept of a reusable "catalytic flask" as illustrated by the Suzuki-Miyaura cross-coupling reaction. The Pd film uniformly covers the inner walls of the flask and eliminates the catalyst separation step. We believe the innovative concept of a reusable catalytic flask is very promising and has the required features to become a commercial product in the future.
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Affiliation(s)
- Albert A Voskanyan
- The Department of Chemistry, The University of Hong Kong , Pokfulam, Hong Kong
| | - Chi-Ying Vanessa Li
- The Department of Chemistry, The University of Hong Kong , Pokfulam, Hong Kong
| | - Kwong-Yu Chan
- The Department of Chemistry, The University of Hong Kong , Pokfulam, Hong Kong
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265
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Challagulla S, Tarafder K, Ganesan R, Roy S. Structure sensitive photocatalytic reduction of nitroarenes over TiO 2. Sci Rep 2017; 7:8783. [PMID: 28821751 PMCID: PMC5562743 DOI: 10.1038/s41598-017-08599-2] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/12/2017] [Indexed: 11/09/2022] Open
Abstract
It is a subject of exploration whether the phase pure anatase or rutile TiO2 or the band alignment due to the heterojunctions in the two polymorphs of TiO2 plays the determining role in efficacy of a photocatalytic reaction. In this work, the phase pure anatase and rutile TiO2 have been explored for photocatalytic nitroarenes reduction to understand the role of surface structures and band alignment towards the reduction mechanism. The conduction band of synthesized anatase TiO2 has been found to be more populated with electrons of higher energy than that of synthesized rutile. This has given the anatase an edge towards photocatalytic reduction of nitroarenes over rutile TiO2. The other factors like adsorption of the reactants and the proton generation did not play any decisive role in catalytic efficacy.
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Affiliation(s)
- Swapna Challagulla
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, 500078, India
| | - Kartick Tarafder
- Department of Physics, National Institute of Technology Karnataka, Surathkal, Mangalore, 575 025, Karnataka, India
| | - Ramakrishnan Ganesan
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, 500078, India.
| | - Sounak Roy
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, 500078, India.
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266
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Abstract
It is a subject of exploration whether the phase pure anatase or rutile TiO2 or the band alignment due to the heterojunctions in the two polymorphs of TiO2 plays the determining role in efficacy of a photocatalytic reaction. In this work, the phase pure anatase and rutile TiO2 have been explored for photocatalytic nitroarenes reduction to understand the role of surface structures and band alignment towards the reduction mechanism. The conduction band of synthesized anatase TiO2 has been found to be more populated with electrons of higher energy than that of synthesized rutile. This has given the anatase an edge towards photocatalytic reduction of nitroarenes over rutile TiO2. The other factors like adsorption of the reactants and the proton generation did not play any decisive role in catalytic efficacy.
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Affiliation(s)
- Swapna Challagulla
- 0000 0004 1772 3598grid.466497.eDepartment of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, 500078 India
| | - Kartick Tarafder
- 0000 0000 9398 3798grid.444525.6Department of Physics, National Institute of Technology Karnataka, Surathkal, Mangalore, 575 025 Karnataka India
| | - Ramakrishnan Ganesan
- 0000 0004 1772 3598grid.466497.eDepartment of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, 500078 India
| | - Sounak Roy
- 0000 0004 1772 3598grid.466497.eDepartment of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, 500078 India
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267
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Kumar V, Prakash J, Singh JP, Chae KH, Swart C, Ntwaeaborwa OM, Swart HC, Dutta V. Role of silver doping on the defects related photoluminescence and antibacterial behaviour of zinc oxide nanoparticles. Colloids Surf B Biointerfaces 2017; 159:191-199. [PMID: 28793230 DOI: 10.1016/j.colsurfb.2017.07.071] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/14/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
Abstract
The Ag doped ZnO (ZnO:Ag) NPs with a hexagonal wurtzite structure were synthesized by a solution combustion method. X-ray absorption near edge structure (XANES) and X-ray photoelectron spectroscopy (XPS) were used to study the defects, local electronic and atomic structures before and after Ag doping. XPS and XANES studies confirmed the deficiency of concentration of defects in ZnO after Ag doping. The photoluminescence study showed the deep level emission in the orange-red region in addition to the band to band emission. It was also found that the defect related emission of ZnO was decreased with an increasing in Ag concentration. The antibacterial behaviour of ZnO and ZnO:Ag NPs was studied against the gram positive and gram negative bacteria. The role of Ag doping and defects in the ZnO NPs were discussed for the observed antibacterial and photoluminescence behaviour.
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Affiliation(s)
- Vinod Kumar
- Center for Energy Studies, Indian Institute of Technology Delhi, New Delhi, 110016, India; Department of Physics, University of the Free State, Bloemfontein, ZA9300, South Africa.
| | - Jai Prakash
- Department of Physics, University of the Free State, Bloemfontein, ZA9300, South Africa; Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Jitendra Pal Singh
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - Keun Hwa Chae
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 136-791, Republic of Korea
| | - C Swart
- Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, ZA9300, South Africa
| | - O M Ntwaeaborwa
- School of Physics, University of the Witwatersrand, Private Bag 3, Wits, 2050, South Africa
| | - H C Swart
- Department of Physics, University of the Free State, Bloemfontein, ZA9300, South Africa
| | - Viresh Dutta
- Center for Energy Studies, Indian Institute of Technology Delhi, New Delhi, 110016, India
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268
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Adams RA, Pol VG, Varma A. Tailored Solution Combustion Synthesis of High Performance ZnCo2O4 Anode Materials for Lithium-Ion Batteries. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b00295] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ryan A. Adams
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Vilas G. Pol
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Arvind Varma
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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269
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Optimization using response surface methodology for fast removal of hazardous azo dye by γ-Fe2O3@CuO nanohybrid synthesized by sol–gel combustion. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-2987-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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270
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Nayebzadeh H, Saghatoleslami N, Haghighi M, Tabasizadeh M. Influence of fuel type on microwave-enhanced fabrication of KOH/Ca 12 Al 14 O 33 nanocatalyst for biodiesel production via microwave heating. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.03.018] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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271
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Ercolino G, Stelmachowski P, Specchia S. Catalytic Performance of Pd/Co3O4 on SiC and ZrO2 Open Cell Foams for Process Intensification of Methane Combustion in Lean Conditions. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01087] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giuliana Ercolino
- Department
of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Paweł Stelmachowski
- Department
of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
- Faculty
of Chemistry, Jagiellonian University in Kraków, ul. Ingardena
3, 30-060 Kraków, Poland
| | - Stefania Specchia
- Department
of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
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272
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Influence of atomic structure on the nano-nickel-based catalyst activity produced by solution combustion synthesis in the hydrogenation of maleic acid. J Catal 2017. [DOI: 10.1016/j.jcat.2016.12.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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273
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Nanomaterials for environmental and energy applications prepared by solution combustion based-methodologies: Role of the fuel. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.matpr.2017.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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274
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Kumar A, Rout L, Achary LSK, Mohanty SK, Dash P. A combustion synthesis route for magnetically separable graphene oxide–CuFe2O4–ZnO nanocomposites with enhanced solar light-mediated photocatalytic activity. NEW J CHEM 2017. [DOI: 10.1039/c7nj02070h] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A novel GO–CuFe2O4–ZnO ternary nanocomposite has been designed as an efficient photocatalyst for the degradation of four toxic organic pollutants.
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Affiliation(s)
- Aniket Kumar
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | - Lipeeka Rout
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
| | | | | | - Priyabrat Dash
- Department of Chemistry
- National Institute of Technology
- Rourkela
- India
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275
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Tian W, Yin J, Wei L, Shen Q, Bibi R, Liu M, Yang B, Li N, Zhou J. Hydrothermally prepared nanosized and mesoporous Ce0.4Zr0.6O2 solid solutions with shape dependence in photocatalysis for the degradation of methylene blue. RSC Adv 2017. [DOI: 10.1039/c7ra01201b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The shape dependence of photocatalysis is confirmed.
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Affiliation(s)
- Wei Tian
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Jun Yin
- Department of Biological and Chemical Engineering
- Jingdezhen College
- Jingdezhen 333000
- PR China
| | - Lingfei Wei
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Quanhao Shen
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Rehana Bibi
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Ming Liu
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Bin Yang
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Naixu Li
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
| | - Jiancheng Zhou
- School of Chemistry and Chemical Engineering
- Southeast University
- Nanjing 211189
- PR China
- Department of Chemical and Pharmaceutical Engineering
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276
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Novoselova LY. Hematite nanoparticle clusters with remarkably high magnetization synthesized from water-treatment waste by one-step “sharp high-temperature dehydration”. RSC Adv 2017. [DOI: 10.1039/c7ra09062e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hematite (α-Fe2O3) nanoparticle clusters with an exceptionally high magnetization of 51 emu g−1 were synthesized for the first time. This material was prepared from water-treatment waste by a new “sharp high-temperature dehydration” process.
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Affiliation(s)
- L. Yu. Novoselova
- Institute of Petroleum Chemistry
- Siberian Branch of the Russian Academy of Sciences
- 634055 Tomsk
- Russia
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