1
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Yang F, Jin R, Jiang D. High spatial resolution imaging of the charge injection yield at hematite using scanning electrochemical cell microscopy. Electrochem commun 2022. [DOI: 10.1016/j.elecom.2022.107358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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2
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Yousaf RB, Bakar SA, Mazhar M, Mansoor MA, Iqbal M. Development of Yttrium and Iron Oxide Thin Films via AACVD Method for Photooxidation of Water. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222010050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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3
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Mithun Prakash R, Ningaraju C, Gayathri K, Teja Y, Aslam Manthrammel M, Shkir M, AlFaify S, Sakar M. One-step solution auto-combustion process for the rapid synthesis of crystalline phase iron oxide nanoparticles with improved magnetic and photocatalytic properties. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103435] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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4
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Valizadeh A, Aleshkevych P, Najafpour MM. Role of Pt and PtO 2 in the Oxygen-Evolution Reaction in the Presence of Iron under Alkaline Conditions. Inorg Chem 2021; 61:613-621. [PMID: 34902241 DOI: 10.1021/acs.inorgchem.1c03331] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The oxygen-evolution reaction (OER) through water oxidation is an inevitable reaction for water splitting toward storing energy. However, OER is a four-electron and slow reaction, which is also a bottleneck for water splitting. To find the role of Pt and PtO2 on the OER in the presence of Fe, the electrochemistry of Pt foil and PtO2 is investigated in the absence/presence of K2FeO4 as a soluble Fe salt at pH ≈ 13. After the addition of K2FeO4, a remarkable increase in the OER is recorded in the presence of Pt or PtO2. The obtained catalysts were characterized by operando visible spectroscopy, high-resolution transmission electron microscopy, scanning electron microscopy, electron-spin resonance spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and electrochemical methods. KOH solutions usually contain Fe and/or Ni impurities. It is found that neither Pt nor PtO2 is an OER catalyst in a Ni/Fe-free KOH, and even at an overpotential of 570 mV in purified KOH (pH ≈ 13), no clear OER was observed.
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Affiliation(s)
- Amirreza Valizadeh
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan 45137-66731, Iran
| | - Pavlo Aleshkevych
- Institute of Physics, Polish Academy of Sciences, Warsaw 02-668, Poland
| | - Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan 45137-66731, Iran.,Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences, Zanjan 45137-66731, Iran.,Research Center for Basic Sciences and Modern Technologies, Institute for Advanced Studies in Basic Sciences, Zanjan 45137-66731, Iran
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5
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S-Scheme α-Fe2O3/TiO2 Photocatalyst with Pd Cocatalyst for Enhanced Photocatalytic H2 Production Activity and Stability. Catal Letters 2021. [DOI: 10.1007/s10562-021-03873-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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6
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Hydrothermal Synthesis of FeOOH and Fe2O3 Modified Self-Organizing Immobilized TiO2 Nanotubes for Photocatalytic Degradation of 1H-Benzotriazole. Catalysts 2020. [DOI: 10.3390/catal10121371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, titanium dioxide nanotubes were prepared by electrochemical anodization technique and modified with an aqueous solution of FeCl3 using hydrothermal synthesis method to control the amount and distribution of iron compounds on the anatase TiO2 nanotubes. The objective was to synthesize immobilized FeOOH@TiO2 or Fe2O3@TiO2 photocatalysts designed for the flow-through reactor systems; to investigate thermal treatment effect on the photocatalytic efficiency; to determine appropriate Fe-compounds concentration for the maximum photocatalytic activity improvement, and to explain the mechanism responsible for the enhancement. The photocatalysts were tested for the degradation of 1H-benzotriazole in water under UV/solar light irradiation. Up to two times increase in the photocatalytic activity was obtained when TiO2 nanotubes were modified with 0.8 mM Fe. At higher Fe concentrations (8 mM and 80 mM), the photocatalytic activity of the given photocatalysts decreased. To confirm the formation of FeOOH or Fe2O3 species, and to clarify the mechanism of photoactivity, X-ray diffraction (XRD), Raman spectroscopy (RS), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray spectroscopy (EDS) and UV-Vis spectroscopy were used.
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7
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Duan B, Mei L. A Z-scheme Fe2O3/g-C3N4 heterojunction for carbon dioxide to hydrocarbon fuel under visible illuminance. J Colloid Interface Sci 2020; 575:265-273. [DOI: 10.1016/j.jcis.2020.04.112] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/10/2020] [Accepted: 04/27/2020] [Indexed: 11/29/2022]
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8
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Fabrication of Hybrid Catalyst ZnO Nanorod/α-Fe2O3 Composites for Hydrogen Evolution Reaction. CRYSTALS 2020. [DOI: 10.3390/cryst10050356] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
This report presents the synthesis of ZnO nanorod/α-Fe2O3 composites by the hydrothermal method with different weight percentages of α-Fe2O3 nanoparticles. The as-synthesized nanorod composites were characterized by different techniques, such as X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), field emission scanning electron microscopy (FE-SEM), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS). From our results, it was found that the ZnO/α-Fe2O3 (3 wt%) nanorod composites exhibit a higher hydrogen evolution reaction (HER) activity when compared to other composites. The synergetic effect between ZnO and (3 wt%) of α-Fe2O3 nanocomposites resulted in a low onset potential of −125 mV, which can effectively produce more H2 than pure ZnO. The H2 production rate over the composite of ZnO/α-Fe2O3 (3 wt%) clearly shows a significant improvement in the photocatalytic activity in the heterojunction of the ZnO nanorods and α-Fe2O3 nanoparticles on nickel foam.
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9
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Islam A, Hwa Teo S, Awual MR, Taufiq-Yap YH. Ultrathin Assembles of Porous Array for Enhanced H 2 Evolution. Sci Rep 2020; 10:2324. [PMID: 32047187 PMCID: PMC7012925 DOI: 10.1038/s41598-020-59325-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 01/27/2020] [Indexed: 11/20/2022] Open
Abstract
Since the complexity of photocatalyst synthesis process and high cost of noble cocatalyst leftovers a major hurdle to producing hydrogen (H2) from water, a noble metal-free Ni-Si/MgO photocatalyst was realized for the first time to generate H2 effectively under illumination with visible light. The catalyst was produced by means of simple one-pot solid reaction using self-designed metal reactor. The physiochemical properties of photocatalyst were identified by XRD, FESEM, HRTEM, EDX, UV-visible, XPS, GC and PL. The photocatalytic activities of Ni-Si/MgO photocatalyst at different nickel concentrations were evaluated without adjusting pH, applied voltage, sacrificial agent or electron donor. The ultrathin-nanosheet with hierarchically porous structure of catalyst was found to exhibit higher photocatalytic H2 production than hexagonal nanorods structured catalyst, which suggests that the randomly branched nanosheets are more active surface to increase the light-harvesting efficiency due to its short electron diffusion path. The catalyst exhibited remarkable performance reaching up to 714 µmolh−1 which is higher among the predominant semiconductor catalyst. The results demonstrated that the photocatalytic reaction irradiated under visible light illumination through the production of hydrogen and hydroxyl radicals on metals. The outcome indicates an important step forward one-pot facile approach to prepare noble ultrathin photocatalyst for hydrogen production from water.
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Affiliation(s)
- Aminul Islam
- Department of Petroleum and Mining Engineering, Jashore University of Science and Technology, Jashore, 7408, Bangladesh.
| | - Siow Hwa Teo
- Chancellery Office, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia.,Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Md Rabiul Awual
- Materials Science and Research Center, Japan Atomic Energy Agency (JAEA), Hyogo, 679-5148, Japan
| | - Yun Hin Taufiq-Yap
- Chancellery Office, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia. .,Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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10
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Costa GS, Costa MJS, Oliveira HG, Lima LCB, Luz GE, Cavalcante LS, Santos RS. Effect of the applied potential condition on the photocatalytic properties of Fe2O3|WO3 heterojunction films. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-019-01429-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Co-sensitized TiO2 electrodes with different quantum dots for enhanced hydrogen evolution in photoelectrochemical cells. J APPL ELECTROCHEM 2019. [DOI: 10.1007/s10800-019-01299-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Zhang J, Wang H, Yuan X, Zeng G, Tu W, Wang S. Tailored indium sulfide-based materials for solar-energy conversion and utilization. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2019. [DOI: 10.1016/j.jphotochemrev.2018.11.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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13
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Subramanyam P, Vinodkumar T, Nepak D, Deepa M, Subrahmanyam C. Mo-doped BiVO4@reduced graphene oxide composite as an efficient photoanode for photoelectrochemical water splitting. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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14
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Momeni MM, Mahvari M, Ghayeb Y. Photoelectrochemical properties of iron-cobalt WTiO2 nanotube photoanodes for water splitting and photocathodic protection of stainless steel. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.10.035] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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15
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Mahmoud MS, Ahmed E, Farghali A, Zaki A, Abdelghani EA, Barakat NA. Influence of Mn, Cu, and Cd–doping for titanium oxide nanotubes on the photocatalytic activity toward water splitting under visible light irradiation. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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17
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Low field magneto-tunable photocurrent in CoFe 2O 4 nanostructure films for enhanced photoelectrochemical properties. Sci Rep 2018; 8:6522. [PMID: 29695871 PMCID: PMC5916887 DOI: 10.1038/s41598-018-24947-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 03/15/2018] [Indexed: 12/16/2022] Open
Abstract
Efficient solar to hydrogen conversion using photoelectrochemical (PEC) process requires semiconducting photoelectrodes with advanced functionalities, while exhibiting high optical absorption and charge transport properties. Herein, we demonstrate magneto-tunable photocurrent in CoFe2O4 nanostructure film under low applied magnetic fields for efficient PEC properties. Photocurrent is enhanced from ~1.55 mA/cm2 to ~3.47 mA/cm2 upon the application of external magnetic field of 600 Oe leading to ~123% enhancement. This enhancement in the photocurrent is attributed to the reduction of optical bandgap and increase in the depletion width at CoFe2O4/electrolyte interface resulting in an enhanced generation and separation of the photoexcited charge carriers. The reduction of optical bandgap in the presence of magnetic field is correlated to the shifting of Co2+ ions from octahedral to tetrahedral sites which is supported by the Raman spectroscopy results. Electrochemical impedance spectroscopy results confirm a decrease in the charge transfer resistance at the CoFe2O4/electrolyte interface in the presence of magnetic field. This work evidences a coupling of photoexcitation properties with magnetic properties of a ferromagnetic-semiconductor and the effect can be termed as magnetophototronic effect.
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18
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Sunlight-Induced photochemical synthesis of Au nanodots on α-Fe 2O 3@Reduced graphene oxide nanocomposite and their enhanced heterogeneous catalytic properties. Sci Rep 2018; 8:5718. [PMID: 29632316 PMCID: PMC5890287 DOI: 10.1038/s41598-018-24066-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 03/21/2018] [Indexed: 12/21/2022] Open
Abstract
In this present study, we report the synthesis of Au nanodots on α-Fe2O3@reduced graphene oxide (RGO) based hetero-photocatalytic nanohybrids through a chlorophyll mediated photochemical synthesis. In this process, chlorophyll induces a rapid reduction (30 min) of Au3+ ions to Au° metallic nanodots on α-Fe2O3@RGO surface under sunlight irradiation. The nucleation growth process, photo-induced electron-transfer mechanism and physico-chemical properties of the Au@α-Fe2O3@RGO ternary nanocomposites were systematically studied with various analytical techniques. This novel photochemical synthesis process is a cost-effective, convenient, surfactant-less, and scalable method. Moreover, the prepared ternary nanocomposites enhanced catalytic activity as compared to pure α-Fe2O3 and α-Fe2O3@RGO. The advantages and synergistic effect of Au@α-Fe2O3@RGO exhibit, (i) a broader range of visible-light absorption due to visible light band gap of α-Fe2O3, (ii) lower recombination possibility of photo-generated electrons and holes due to effect of Au and (iii) faster electron transfer due to higher conductivity of RGO. Therefore, the prepared Au@α-Fe2O3@RGO hetero-photocatalytic nanohybrids exhibited a remarkable photocatalytic activity, thus enabling potential active hetero-photocatalyst for industrial and environmental applications.
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19
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Qiu F, Vervuurt RHJ, Verheijen MA, Zaia EW, Creel EB, Kim Y, Urban JJ, Bol AA. Bottom-up meets top-down: tailored raspberry-like Fe 3O 4-Pt nanocrystal superlattices. NANOSCALE 2018; 10:5859-5863. [PMID: 29557477 DOI: 10.1039/c8nr00655e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supported catalysts are widely used in industry and can be optimized by tuning the composition, chemical structure, and interface of the nanoparticle catalyst and oxide support. Here we firstly combine a bottom up colloidal synthesis method with a top down atomic layer deposition (ALD) process to achieve a raspberry-like Pt-decorated Fe3O4 (Fe3O4-Pt) nanoparticle superlattices. This nanocomposite ensures the precision of the catalyst/support interface, improving the catalytic efficiency of the Fe3O4-Pt nanocomposite system. The morphology of the hybrid nanocomposites resulting from different cycles of ALD was monitored by scanning transmission electron microscopy, giving insight into the nucleation and growth mechanism of the ALD process. X-ray photoelectron spectroscopy studies confirm the anticipated electron transfer from Fe3O4 to Pt through the nanocomposite interface. Photocurrent measurement further suggests that Fe3O4 superlattices with controlled decoration of Pt have substantial promise for energy-efficient photoelectrocatalytic oxygen evolution reaction. This work opens a new avenue for designing supported catalyst architectures via precisely controlled decoration of single component superlattices with noble metals.
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Affiliation(s)
- Fen Qiu
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720 USA.
| | - René H J Vervuurt
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
| | - Marcel A Verheijen
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. and Philips Innovation Labs, High Tech Campus 11, 5656 AE Eindhoven, The Netherlands
| | - Edmond W Zaia
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720 USA. and University of California, Berkeley, California 94720, USA
| | - Erin B Creel
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720 USA. and University of California, Berkeley, California 94720, USA
| | - Youngsang Kim
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720 USA.
| | - Jeffrey J Urban
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720 USA.
| | - Ageeth A Bol
- Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
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20
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Chen WQ, Chung MC, Valinton JAA, Penaloza DP, Chuang SH, Chen CH. Heterojunctions of silver–iron oxide on graphene for laser-coupled oxygen reduction reactions. Chem Commun (Camb) 2018; 54:7900-7903. [DOI: 10.1039/c8cc03136c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report a two-step hybridization of N-doped graphene and Ag-decorated Fe2O3 hematite to realize a balanced oxygen adsorption/desorption equilibrium and a laser-coupled ORR (LORR).
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Affiliation(s)
- Wei-Quan Chen
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung
- Taiwan
| | - Min-Chuan Chung
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung
- Taiwan
| | | | - David P. Penaloza
- Department of Chemistry
- College of Science
- De La Salle University
- Manila 1004
- Philippines
| | - Shiow-Huey Chuang
- Department of Applied Chemistry
- National University of Kaohsiung
- Kaohsiung
- Taiwan
| | - Chun-Hu Chen
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung
- Taiwan
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21
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de Castro IA, Datta RS, Ou JZ, Castellanos-Gomez A, Sriram S, Daeneke T, Kalantar-Zadeh K. Molybdenum Oxides - From Fundamentals to Functionality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701619. [PMID: 28815807 DOI: 10.1002/adma.201701619] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 04/27/2017] [Indexed: 05/20/2023]
Abstract
The properties and applications of molybdenum oxides are reviewed in depth. Molybdenum is found in various oxide stoichiometries, which have been employed for different high-value research and commercial applications. The great chemical and physical characteristics of molybdenum oxides make them versatile and highly tunable for incorporation in optical, electronic, catalytic, bio, and energy systems. Variations in the oxidation states allow manipulation of the crystal structure, morphology, oxygen vacancies, and dopants, to control and engineer electronic states. Despite this overwhelming functionality and potential, a definitive resource on molybdenum oxide is still unavailable. The aim here is to provide such a resource, while presenting an insightful outlook into future prospective applications for molybdenum oxides.
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Affiliation(s)
| | | | - Jian Zhen Ou
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | | | - Sharath Sriram
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Torben Daeneke
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
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22
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Imran M, Yousaf AB, Kasak P, Zeb A, Zaidi SJ. Highly efficient sustainable photocatalytic Z-scheme hydrogen production from an α-Fe2O3 engineered ZnCdS heterostructure. J Catal 2017. [DOI: 10.1016/j.jcat.2017.06.019] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Devarapalli RR, Kamaja CK, Shelke MV. Co–catalytic Metal Oxide Nanoparticles Decorated Silicon/ Hematite Core Shell Nanowire Arrays as Efficient Photo Electrodes for Water Splitting. ChemistrySelect 2017. [DOI: 10.1002/slct.201700083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Rami Reddy Devarapalli
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory (CSIR-NCL) Pune 411008, MH India
- Academy of Scientific and Innovative Research (AcSIR) Chennai 600113, TN India
| | - Chaitanya Krishna Kamaja
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory (CSIR-NCL) Pune 411008, MH India
- Academy of Scientific and Innovative Research (AcSIR) Chennai 600113, TN India
| | - Manjusha V. Shelke
- Physical and Materials Chemistry DivisionCSIR-National Chemical Laboratory (CSIR-NCL) Pune 411008, MH India
- Academy of Scientific and Innovative Research (AcSIR) Chennai 600113, TN India
- CSIR-Network Institute for Solar EnergyCSIR-National Chemical Laboratory Pune 411008, MH India
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Ristova MM, Yu KM. Surface modification of NiCdO barrier layer in complex photoanodes and TiO2 protective coating for efficient and stabile water dissociation. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-016-3398-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Wang JC, Ren J, Yao HC, Zhang L, Wang JS, Zang SQ, Han LF, Li ZJ. Synergistic photocatalysis of Cr(VI) reduction and 4-Chlorophenol degradation over hydroxylated α-Fe2O3 under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2016; 311:11-9. [PMID: 26954471 DOI: 10.1016/j.jhazmat.2016.02.055] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/21/2016] [Accepted: 02/24/2016] [Indexed: 05/12/2023]
Abstract
A series of Fe2O3 materials with hydroxyl are synthesized in different monohydric alcohol (C2-C5) solvents by solvothermal method and characterized by XRD, BET, XPS, TG and EA. The amount of hydroxyl is demonstrated to be emerged on the surface of the as-synthesized Fe2O3 particles and their contents are determined to be from 7.99 to 3.74 wt%. The Cr(VI) reduction experiments show that the hydroxyl content of Fe2O3 samples exacts great influence on the photocatalytic activity under visible light irradiation (λ>400 nm) and that the Fe2O3 sample synthesized in n-butyl alcohol exhibits the optimal photocatalytic activity. The synergistic photocatalysis for 4-Chlorophenol (4-CP) degradation and Cr(VI) reduction over above Fe2O3 sample is further investigated. The photocatalytic ratio of Cr(VI) reduction are enhanced from 24.8% to 70.2% while that of 4-CP oxidation are increased from 13.5% to 47.8% after 1 h visible light irradiation. The Fe2O3 sample keeps good degradation rates of mixed pollutants after 9 runs. The active oxygen intermediates O2(-)˙, ˙OH and H2O2 formed in the photoreaction process are discovered by ESR measurement and UV-vis test. The photocatalytic degradation mechanism is proposed accordingly.
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Affiliation(s)
- Ji-Chao Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China
| | - Juan Ren
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China
| | - Hong-Chang Yao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China.
| | - Lin Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China
| | - Jian-She Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China
| | - Shuang-Quan Zang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China
| | - Li-Feng Han
- Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Zhong-Jun Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450002, China.
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Sumathi C, Venkateswara Raju C, Muthukumaran P, Wilson J, Ravi G. Au–Pd bimetallic nanoparticles anchored on α-Fe2O3 nonenzymatic hybrid nanoelectrocatalyst for simultaneous electrochemical detection of dopamine and uric acid in the presence of ascorbic acid. J Mater Chem B 2016; 4:2561-2569. [DOI: 10.1039/c6tb00501b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We have found that magnetic α-Fe2O3 nanocubes exhibit an intrinsic catalytic activity toward the electrochemical sensing of dopamine (DA) and uric acid (UA) in the presence of ascorbic acid.
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Affiliation(s)
- C. Sumathi
- Polymer Electronics Lab
- Department of Bioelectronics and Biosensors
- Alagappa University
- Karaikudi-630004
- India
| | - C. Venkateswara Raju
- Electrodics and Electrocatalysis Division
- CSIR-Central Electrochemical Research Institute
- Karaikudi 630 003
- India
| | - P. Muthukumaran
- Polymer Electronics Lab
- Department of Bioelectronics and Biosensors
- Alagappa University
- Karaikudi-630004
- India
| | - J. Wilson
- Polymer Electronics Lab
- Department of Bioelectronics and Biosensors
- Alagappa University
- Karaikudi-630004
- India
| | - G. Ravi
- Photonic Crystals Lab
- Department of Physics
- Alagappa University
- Karaikudi-630 004
- India
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28
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Zhao P, Wu F, Kronawitter CX, Chen Z, Yao N, Koel BE. The (0001) surfaces of α-Fe2O3 nanocrystals are preferentially activated for water oxidation by Ni doping. Phys Chem Chem Phys 2015; 17:26797-803. [DOI: 10.1039/c5cp04555j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A modification process on hematite nanoplates leads to controlled surface area ratio of (0001) facets and Ni-doped surfaces. Electrochemical testing shows the enhancement of water oxidation activity by Ni-doping increases as the surface area ratio of (0001) facets increases.
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Affiliation(s)
- Peng Zhao
- Department of Chemical and Biological Engineering
- Princeton University
- Princeton
- USA
| | - Fan Wu
- Princeton Institute for Science and Technology of Materials
- Princeton University
- Princeton
- USA
| | | | - Zhu Chen
- Department of Chemical and Biological Engineering
- Princeton University
- Princeton
- USA
| | - Nan Yao
- Princeton Institute for Science and Technology of Materials
- Princeton University
- Princeton
- USA
| | - Bruce E. Koel
- Department of Chemical and Biological Engineering
- Princeton University
- Princeton
- USA
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