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Li L, Wang X, Gu H, Zhang H, Zhang J, Zhang Q, Dai WL. Which Is More Efficient in Promoting the Photocatalytic H 2 Evolution Performance of g-C 3N 4: Monometallic Nanocrystal, Heterostructural Nanocrystal, or Bimetallic Nanocrystal? Inorg Chem 2022; 61:4760-4768. [PMID: 35245035 DOI: 10.1021/acs.inorgchem.2c00171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Generally, an excellent cocatalyst could promote the photocatalytic hydrogen (H2) evolution performance of g-C3N4 significantly. Herein, a superior cocatalyst of gold-platinum (AuPt) nanocrystal with an ultralow content of Pt was successfully decorated on carbon self-doping g-C3N4 nanosheets (AuPt/CCN) via a facile photodeposition route. The corresponding Pt/CCN, Au/CCN, Au/Pt/CCN, and Pt/Au/CCN were also prepared for comparison. It is found that AuPt/CCN exhibits much superior photocatalytic H2 evolution performance (1135 μmol/h) when irradiated with a 300 W Xe lamp, up to 20, 12, 5, 2, and 1.5 times that of the pristine CCN, Pt/CCN, Au/CCN, Au/Pt/CCN, and Pt/Au/CCN, respectively. The quantum efficiency (QE) of AuPt/CCN at 420 nm reaches 12.5%. The experimental and density functional theory calculation results suggested that the improved AuPt performance can be mainly ascribed to the non-plasmon-related synergistic effect of Au and Pt atoms in AuPt nanocrystal: (1) the proximity and the electronegativity difference of Au and Pt atoms in AuPt accelerate the transfer and separation of charge carriers and (2) the synergistic interaction between Pt and Au atoms optimizes the Gibbs free energy (ΔGH*) of H* (atom) adsorption on AuPt, promoting the H2 generation kinetics of AuPt/CCN.
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Affiliation(s)
- Lingfeng Li
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Xiaohao Wang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Huajun Gu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Huihui Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Juhua Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Quan Zhang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
| | - Wei-Lin Dai
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, P. R. China
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2
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Gu Y, Xu D, Huang Y, Long Z, Chen G. CO x-free hydrogen production via ammonia decomposition over mesoporous Co/Al 2O 3 catalysts with highly dispersed Co species synthesized by a facile method. Dalton Trans 2021; 50:1443-1452. [PMID: 33439164 DOI: 10.1039/d0dt03262j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Transition metals have been considered as potential catalysts for ammonia decomposition to produce COx-free hydrogen for fuel cells. However, the facile synthesis of transition metal catalysts with small size active species, high porosity and good structural stability is still a challenge in catalytic NH3 decomposition. Herein, mesoporous Co/Al2O3 catalysts with various cobalt contents were synthesized by a facile modified sol-gel method. The catalyst 15CoAl with 15 at% cobalt content realizes the optimal catalytic NH3 decomposition performance. 92% NH3 conversion at 600 °C is achieved with a gaseous hourly space velocity (GHSV) of 24 000 cm3 gcat-1 h-1 and a hydrogen formation rate of 33.9 mmol gcat-1 min-1 at 600 °C is maintained after a 120 h long-duration stability test. Uniform small cobalt particles with high dispersion are well embedded into the skeleton of the mesoporous Al2O3 matrix. The aggregation of active cobalt species during the high temperature reaction can be effectively prevented by the mesoporous Al2O3 matrix due to the strong interaction between them, thus ensuring a good catalytic performance for ammonia decomposition.
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Affiliation(s)
- Yingqiu Gu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.
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Murugadoss G, Kumar DD, Kumar MR, Venkatesh N, Sakthivel P. Silver decorated CeO 2 nanoparticles for rapid photocatalytic degradation of textile rose bengal dye. Sci Rep 2021; 11:1080. [PMID: 33441777 PMCID: PMC7806749 DOI: 10.1038/s41598-020-79993-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 11/24/2020] [Indexed: 11/09/2022] Open
Abstract
High quality silver (Ag) decorated CeO2 nanoparticles were prepared by a facile one-step chemical method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), High resolution transmission electron microscopy (HR-TEM), fourier transform infrared spectrometer (FT-IR), electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), UV-Visible absorption (UV-Vis), photoluminescence (PL) and thermogravimetric analysis. The decoration of Ag on CeO2 surface was confirmed by XRD, EPR and HR-TEM analysis. Harmful textile pollutant Rose Bengal dye was degraded under sunlight using the novel Ag decorated CeO2 catalyst. It was found that great enhancement of the degradation efficiency for Ag/CeO2 compared to pure CeO2, it can be ascribed mainly due to decrease in its band gap and charge carrier recombination rate. The Ag/CeO2 sample exhibited an efficient photocatalytic characteristic for degrading RB under visible light irradiation with a high degradation rate of 96% after 3 h. With the help of various characterizations, a possible degradation mechanism has been proposed which shows the effect of generation of oxygen vacancies owing to the decoration of Ag on the CeO2 surface.
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Affiliation(s)
- G Murugadoss
- Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai, Tamil Nadu, 600119, India.
| | - D Dinesh Kumar
- Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai, Tamil Nadu, 600119, India
| | - M Rajesh Kumar
- Institute of Natural Science and Mathematics, Ural Federal University, Yekaterinburg, 620002, Russia.
| | - N Venkatesh
- Department of Nanoscience and Technology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
| | - P Sakthivel
- Department of Nanoscience and Technology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
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Muthukumar P, Pannipara M, Al-Sehemi AG, Anthony SP. Highly enhanced bifunctional electrocatalytic activity of mixed copper–copper oxides on nickel foam via composition control. NEW J CHEM 2020. [DOI: 10.1039/d0nj02311f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fabricating Cu2O–CuO and CuO directly on the conducting nickel foam resulted in highly enhanced OER and HER electrocatalytic activity in an alkaline medium, respectively.
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Affiliation(s)
- Pandi Muthukumar
- Department of Chemistry
- School of Chemical & Biotechnology, SASTRA Deemed University
- Thanjavur-613401
- India
| | - Mehboobali Pannipara
- Department of Chemistry
- King Khalid University
- Abha 61413
- Saudi Arabia
- Research center for Advanced Materials Science
| | - Abdullah G. Al-Sehemi
- Department of Chemistry
- King Khalid University
- Abha 61413
- Saudi Arabia
- Research center for Advanced Materials Science
| | - Savarimuthu Philip Anthony
- Department of Chemistry
- School of Chemical & Biotechnology, SASTRA Deemed University
- Thanjavur-613401
- India
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5
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Murugadoss G, Ma J, Ning X, Kumar MR. Selective metal ions doped CeO2 nanoparticles for excellent photocatalytic activity under sun light and supercapacitor application. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.107577] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Abazari R, Mahjoub AR, Salehi G. Preparation of amine functionalized g-C 3N 4@ H/SMOF NCs with visible light photocatalytic characteristic for 4-nitrophenol degradation from aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:921-931. [PMID: 30497046 DOI: 10.1016/j.jhazmat.2018.11.087] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 10/31/2018] [Accepted: 11/13/2018] [Indexed: 06/09/2023]
Abstract
At ambience temperature, a facile and large-scale sonochemical synthesis route was used to synthesize graphitic carbon nitride@[Ti4C24H39N3O29] metal-organic framework nanocomposites (g-C3N4-X@YTi-MIL125-NH2 NCs, where X and Y stood for the weight percentages of g - C3N4 and the synthesis method of Ti-MIL125-NH2, respectively) having 2-Amino-1,4-benzenedicarboxylic acid (2-ATA) ligand with amine functional free groups. The obtained NCs were characterized by FT-IR, PXRD, FE-SEM, BET, UV-DRS, PL, EIS, and zeta potential. Moreover, g-C3N4-X@YTi-MIL125-NH2 capability to eliminate 4-nitrophenol (4-NP) contaminant from water via visible light illumination was explored. Our synthesized NCs under a facile, green ultrasonic technique (i.e. g-C3N4-30@STi-MIL125-NH2) had a higher percentage of degradation than those from hydrothermal technique (i.e. g-C3N4-30@HTi-MIL125-NH2) with degradation percentages of 75% and 57%, respectively, which resulted in effective mass transfer and separation of photo - generated charge carriers. Additionally, this higher percentage of degradation could be attributed to the larger surface area and unique morphology of the ultrasonically synthesized particles with higher homogeneity and better and non-agglomerated distribution. Furthermore, excellent reusability and stability were observed for g-C3N4-30@STi-MIL125-NH2. We also explored the role of some scavengers in the degradation procedures to investigate the effect of active species. The experimental results were used to describe the suggested mechanism capability for improved photocatalysis.
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Affiliation(s)
- Reza Abazari
- Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, 14115-175, Iran.
| | - Ali Reza Mahjoub
- Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, 14115-175, Iran.
| | - Ghazal Salehi
- Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, 14115-175, Iran
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7
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Behera A, Kandi D, Majhi SM, Martha S, Parida K. Facile synthesis of ZnFe 2O 4 photocatalysts for decolourization of organic dyes under solar irradiation. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:436-446. [PMID: 29515956 PMCID: PMC5815280 DOI: 10.3762/bjnano.9.42] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 01/17/2018] [Indexed: 05/27/2023]
Abstract
ZnFe2O4 was fabricated by a simple solution-combustion method. The structural, optical and electronic properties are investigated by XRD, TEM, FESEM, UV-vis DRS, PL, FTIR and photocurrent measurements. The photocatalytic activity of the prepared material is studied with regard to the degradation of rhodamine B (Rh B) and Congo red under solar irradiation. The kinetic study showed that the material exhibits zeroth and first order reaction kinetics for the degradation of Rh B and Congo red, respectively. The photocatalytic behaviour of ZnFe2O4 was systematically studied as a function of the activation temperature. ZnFe2O4 prepared at 500 °C showed the highest activity in degrading Rh B and Congo red. The highest activity of ZnFe2O4-500 °C correlates well with the lowest PL intensity, highest photocurrent and lowest particle size.
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Affiliation(s)
- Arjun Behera
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan (deemed to be university), Bhubaneswar-751030, India
| | - Debasmita Kandi
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan (deemed to be university), Bhubaneswar-751030, India
| | - Sanjit Manohar Majhi
- Department of Electronic Information Materials Engineering, Division of Advanced Materials Science and Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
| | - Satyabadi Martha
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan (deemed to be university), Bhubaneswar-751030, India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan (deemed to be university), Bhubaneswar-751030, India
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8
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Patnaik S, Martha S, Madras G, Parida K. The effect of sulfate pre-treatment to improve the deposition of Au-nanoparticles in a gold-modified sulfated g-C 3N 4 plasmonic photocatalyst towards visible light induced water reduction reaction. Phys Chem Chem Phys 2018; 18:28502-28514. [PMID: 27722288 DOI: 10.1039/c6cp04262g] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In continuation of our earlier work on Au-g-C3N4 and to improve its activity further, Au incorporated sulfated carbon nitride (g-C3N4) has been designed by using a simple impregnation cum borohydrate reduction method for the visible light induced water reduction reaction for hydrogen generation. The photocatalysts were characterized using various instrumental methods such as PXRD, UV-Vis DRS, SEM, HR-TEM, XPS, PL and TRPL spectral analysis. Functionalisation by the -HSO3 group and incorporation of AuNPs in the g-C3N4 skeleton lead to the extension of its pi-conjugated system, modification of its semiconductor properties, such as band structure engineering with a tunable bandgap, red-shift of the optical absorption band and promotion of charge migration and separation. The sulfate pre-treated g-C3N4 samples are supposed to have a defected surface due to oxygen vacancies, which increases the adsorption of AuNPs onto the vacant oxygen sites. Thus the AuNPs get adsorbed on the reduced surfaces, increasing the extent and effectiveness of the electronic communication between gold and the g-C3N4 interface. The improved photocatalytic activity could be attributed to the surface plasmon resonance (SPR) effect of AuNPs, which synergistically facilitates the photocatalysis process. The photocatalytic activity of Au-sulfated g-C3N4 for photocatalytic splitting of water to produce H2 was increased 1.5 times compared to that of Au-g-C3N4, 2.5 times compared to that of sulphated-g-C3N4 and 35 times compared to that of single-phase g-C3N4.
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Affiliation(s)
- Sulagna Patnaik
- Centre for Nano Science and Nano Technology, SOA University, Bhubaneswar-751030, India.
| | - Satyabadi Martha
- Centre for Nano Science and Nano Technology, SOA University, Bhubaneswar-751030, India.
| | - Giridhar Madras
- Department of Chemical Engineering, Indian Institute of Science, Bangalore, India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology, SOA University, Bhubaneswar-751030, India.
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9
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Xu H, Dai D, Li S, Ge L, Gao Y. In situ synthesis of novel Cu2CO3(OH)2 decorated 2D TiO2 nanosheets with efficient photocatalytic H2 evolution activity. Dalton Trans 2018; 47:348-356. [DOI: 10.1039/c7dt04096b] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Semiconductor-based photocatalytic hydrogen evolution from water with earth-abundant and low cost co-catalysts has attracted much attention.
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Affiliation(s)
- Hao Xu
- State Key Laboratory of Heavy Oil Processing
- College of Science
- China University of Petroleum Beijing
- Beijing 102249
- People's Republic of China
| | - Dongsheng Dai
- Department of Materials Science and Engineering
- College of Science
- China University of Petroleum Beijing
- Beijing 102249
- People's Republic of China
| | - Songsong Li
- Department of Materials Science and Engineering
- College of Science
- China University of Petroleum Beijing
- Beijing 102249
- People's Republic of China
| | - Lei Ge
- State Key Laboratory of Heavy Oil Processing
- College of Science
- China University of Petroleum Beijing
- Beijing 102249
- People's Republic of China
| | - Yangqin Gao
- Department of Materials Science and Engineering
- College of Science
- China University of Petroleum Beijing
- Beijing 102249
- People's Republic of China
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10
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Muthukumar P, Kumar VV, Reddy GRK, Kumar PS, Anthony SP. Fabrication of strong bifunctional electrocatalytically active hybrid Cu–Cu2O nanoparticles in a carbon matrix. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02048a] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Earth-abundant copper-based hybrid Cu–Cu2ONPs@C in the carbon matrix exhibited enhanced OER and HER catalytic activity compared to pure Cu2O and CuNPs@C.
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Affiliation(s)
- Pandi Muthukumar
- Department of Chemistry
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur-613401
- India
| | - Vadivel Vinod Kumar
- Department of Chemistry
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur-613401
- India
| | | | - P. Suresh Kumar
- Department of Chemistry
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur-613401
- India
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11
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Bhat SSM, Swain D, Feygenson M, Neuefeind JC, Mishra AK, Hodala JL, Narayana C, Shanbhag GV, Sundaram NG. Bi4TaO8Cl Nano-Photocatalyst: Influence of Local, Average, and Band Structure. Inorg Chem 2017; 56:5525-5536. [DOI: 10.1021/acs.inorgchem.6b01970] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Swetha S. M. Bhat
- Materials Science
Division, Poornaprajna Institute of Scientific Research, Bidalur, Near Devanahalli, Bengaluru, Karnataka, India
| | - Diptikanta Swain
- CPMU, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru, Karnataka, India
| | - Mikhail Feygenson
- Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Joerg C. Neuefeind
- Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Abhishek K. Mishra
- Research & Development Department, University of Petroleum and Energy Studies (UPES), Bidholi, Dehradun 248007, India
| | - Janardhan L. Hodala
- Materials Science
Division, Poornaprajna Institute of Scientific Research, Bidalur, Near Devanahalli, Bengaluru, Karnataka, India
| | - Chandrabhas Narayana
- CPMU, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru, Karnataka, India
| | - Ganapati V. Shanbhag
- Materials Science
Division, Poornaprajna Institute of Scientific Research, Bidalur, Near Devanahalli, Bengaluru, Karnataka, India
| | - Nalini G. Sundaram
- Materials Science
Division, Poornaprajna Institute of Scientific Research, Bidalur, Near Devanahalli, Bengaluru, Karnataka, India
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12
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Unexpected rapid photo-catalytic decolourisation/degradation of organic pollutants over highly active hetero junction based vanadium phosphate catalyst. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.10.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Padhi DK, Parida K, Singh SK. Visible-light-induced water reduction reaction for efficient hydrogen production by N-doped In2Ga2ZnO7 nanoparticle decorated on RGO sheets. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00335d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Efficient hydrogen production over graphene-based N-doped In2Ga2ZnO7 nanocomposite under visible irradiation.
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Affiliation(s)
- Deepak kumar Padhi
- Academy of Scientific and Innovative Research (AcSIR)
- Council of Scientific and Industrial Research
- New Delhi-110 001
- India
- Advanced Materials Technology Department
| | - Kulamani Parida
- Academy of Scientific and Innovative Research (AcSIR)
- Council of Scientific and Industrial Research
- New Delhi-110 001
- India
- Centre for Nano Science and Nano Technology
| | - S. K. Singh
- Academy of Scientific and Innovative Research (AcSIR)
- Council of Scientific and Industrial Research
- New Delhi-110 001
- India
- Advanced Materials Technology Department
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14
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Kumar B, Rao GK, Saha S, Ganguli AK. Cu-Based Nanocomposites as Multifunctional Catalysts. Chemphyschem 2015; 17:155-61. [DOI: 10.1002/cphc.201500944] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Bharat Kumar
- Department of Chemistry; Indian Institute of Technology, Hauz Khas; New Delhi 110016 India), Fax
| | - Gyandshwar Kumar Rao
- Centre for Catalysis Research and Innovation and Department of Chemistry and Biomolecular Sciences; University of Ottawa; Ottawa Ontario K1N 6N5 Canada
| | - Soumen Saha
- Department of Chemistry; Indian Institute of Technology, Hauz Khas; New Delhi 110016 India), Fax
| | - Ashok K. Ganguli
- Department of Chemistry; Indian Institute of Technology, Hauz Khas; New Delhi 110016 India), Fax
- Institute of Nano Science and Technology; Mohali, Punjab 160062 India
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15
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Yang J, Wang X, Chen Y, Dai J, Sun S. Enhanced photocatalytic activities of visible-light driven green synthesis in water and environmental remediation on Au/Bi2WO6 hybrid nanostructures. RSC Adv 2015. [DOI: 10.1039/c4ra15349a] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Deposition of Au NPs enhances photocatalytic activity toward selective oxidation of alcohol in water and Cr(vi) reduction over Bi2WO6 nanosheets.
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Affiliation(s)
- Juan Yang
- Institute of Applied Chemistry
- Henan Polytechnic University
- Jiaozuo
- P.R. China
| | - Xiaohan Wang
- Institute of Applied Chemistry
- Henan Polytechnic University
- Jiaozuo
- P.R. China
| | - Yumei Chen
- Institute of Applied Chemistry
- Henan Polytechnic University
- Jiaozuo
- P.R. China
| | - Jun Dai
- Institute of Applied Chemistry
- Henan Polytechnic University
- Jiaozuo
- P.R. China
| | - Shihao Sun
- Institute of Applied Chemistry
- Henan Polytechnic University
- Jiaozuo
- P.R. China
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16
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Samanta S, Martha S, Parida K. Facile Synthesis of Au/g-C3N4Nanocomposites: An Inorganic/Organic Hybrid Plasmonic Photocatalyst with Enhanced Hydrogen Gas Evolution Under Visible-Light Irradiation. ChemCatChem 2014. [DOI: 10.1002/cctc.201300949] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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17
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Martha S, Padhi DK, Parida K. Reduced graphene oxide/InGaZn mixed oxide nanocomposite photocatalysts for hydrogen production. CHEMSUSCHEM 2014; 7:585-597. [PMID: 24127386 DOI: 10.1002/cssc.201300685] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/16/2013] [Indexed: 06/02/2023]
Abstract
A series of reduced graphene oxide and indium-gallium-zinc mixed oxide (RGO/IGZ) nanocomposites were successfully synthesised by a simple one-step hydrothermal method. The as-synthesised nanocomposites were characterised by crystallographic, microscopic, and spectroscopic methods to explore the robust photocatalytic activity of the prepared materials. XRD patterns confirmed the formation of highly pure, single-phase, hexagonal In2 Ga2 ZnO7 with no impurity-related peaks. All the photocatalysts absorbed visible light as observed from the diffuse reflectance UV/Vis spectra. The electron-hole recombination is effectively minimised by the formation of an RGO/metal oxide nanocomposite, which was successfully derived from a photoluminescence (PL) study and photoelectrochemical measurements. The decoration of IGZ nanocrystals onto reduced graphene sheets leads to significant quenching of its luminescent intensity, dramatically improved photocurrent generation (33 times more than neat IGZ) and significantly enhanced photostability. The high photocatalytic activity for H2 production is explained by the strong interaction between the IGZ nanocrystals with RGO sheets, low PL intensity, high photocurrent and large surface area.
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Affiliation(s)
- Satyabadi Martha
- Colloids and Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar-751 013, Odisha (India), Fax.(+91) 674-258163
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18
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Pany S, Naik B, Martha S, Parida K. Plasmon induced nano Au particle decorated over S,N-modified TiO(2) for exceptional photocatalytic hydrogen evolution under visible light. ACS APPLIED MATERIALS & INTERFACES 2014; 6:839-846. [PMID: 24377266 DOI: 10.1021/am403865r] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nano Au deposited mesoporous S,N-TiO2 (SNT) nanocomposites have been fabricated through deposition precipitation technique by employing urea as the hydrolyzing agent. To investigate the structural, optical, and electronic properties, the photocatalysts are characterized through X-ray diffraction (XRD), UV-vis diffuse reflectance spectra, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical measurements. Here in addition to the co-catalyst nature of nano Au particles, surface plasmon resonance (SPR) effect in visible region enhances the light harvestation ability as well as transfer electrons to the conduction band of SNT. Furthermore, easy channelization of photogenerated charge carriers through sulfate facilitated redox couple makes the system more potential towards H2 evolution. TEM study exhibits well interconnective morphology in the matrix which helps easy channelization of electrons in the SNT nanocomposites. The photocatalytic activities have been evaluated for hydrogen generation under the irradiation of visible light and an enhanced activity has been observed for the Au promoted SNT due to the presence of nano Au particles, that is, 3.5 nm. The hydrogen generation activity of 3Au-SNT is nearly 9 times higher than that of neat SNT, and the energy conversion efficiency was found to be 17.6 %.
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Affiliation(s)
- Soumyashree Pany
- Academy of Scientific and Innovative Research , New Delhi-110 001, India
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19
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Nashim A, Martha S, Parida KM. Heterojunction conception of n-La2Ti2O7/p-CuO in the limelight of photocatalytic formation of hydrogen under visible light. RSC Adv 2014. [DOI: 10.1039/c3ra47037g] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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20
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Yin S, Wang X, Mou Z, Wu Y, Huang H, Zhu M, Du Y, Yang P. Synergistic contributions by decreasing overpotential and enhancing charge-transfer in α-Fe2O3/Mn3O4/graphene catalysts with heterostructures for photocatalytic water oxidation. Phys Chem Chem Phys 2014; 16:11289-96. [DOI: 10.1039/c4cp00384e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Proposed mechanism of oxygen evolution from α-Fe2O3/Mn3O4-1/rGO-3 photocatalyst.
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Affiliation(s)
- Shunli Yin
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Xiaomei Wang
- School of Chemistry
- Biology and Material Engineering
- Suzhou University of Science and Technology
- Suzhou 215011, China
| | - Zhigang Mou
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Yijie Wu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Hui Huang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Mingshan Zhu
- CAS Key Laboratory of Colloid
- Interface and Chemical Thermodynamics Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190, China
| | - Yukou Du
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Ping Yang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
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21
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Li P, Cai Y, Fan H. Porous thin sheet-based α-Fe2O3-doped In2O3 structures: hydrothermal synthesis and enhanced Cl2 sensing performance. RSC Adv 2013. [DOI: 10.1039/c3ra43616k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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