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Ternary CuS@Ag/BiVO4 composite for enhanced photo-catalytic and sono-photocatalytic performance under visible light. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fu M, Yang J, Sun X, Tian W, Yin G, Tian S, Tan M, Liu H, Xing X, Huang H. Photo-Fenton Process over an Fe-Free 3%-CuO/Sr 0.76Ce 0.16WO 4 Photocatalyst under Simulated Sunlight. ACS OMEGA 2021; 6:27297-27304. [PMID: 34693150 PMCID: PMC8529691 DOI: 10.1021/acsomega.1c04107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Photo-Fenton is a promising photocatalytic technology that utilizes sunlight. Herein, an Fe-free 3%-CuO/Sr0.76Ce0.16WO4 photocatalyst was synthesized to apply simulated wastewater degradation via a photo-Fenton process under simulated sunlight. The photodegradation efficiency of RhB solution over the 3%-CuO/Sr0.76Ce0.16WO4 photocatalyst is 93.2% in the first 3 h; its photocatalytic efficiency remains at 91.6% even after three cycle experiments. The kinetic constant of the 3%-CuO/Sr0.76Ce0.16WO4 photocatalyst is 0.0127 min-1, which is 2.8-fold that of an intrinsic Sr0.76Ce0.16WO4 sample. The experiment of radical quenching revealed that the photogenerated electrons and holes are transferred to CuO to form hydroxyl radicals. Besides, the photocatalyst was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), diffused reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS) measurements. It has some reference significance for the design of iron-free photocatalysts.
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Affiliation(s)
- Mingyan Fu
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Jia Yang
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Xiaorui Sun
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Wei Tian
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Guihua Yin
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Sheng Tian
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Mingdan Tan
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Hongfu Liu
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Xiaofeng Xing
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
| | - Huisheng Huang
- Chongqing Key Laboratory
of Inorganic Special Functional Materials, College of Chemistry and
Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China
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Yentür G, Dükkancı M. Synergistic effect of sonication on photocatalytic oxidation of pharmaceutical drug carbamazepine. ULTRASONICS SONOCHEMISTRY 2021; 78:105749. [PMID: 34520962 PMCID: PMC8441083 DOI: 10.1016/j.ultsonch.2021.105749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 07/28/2021] [Accepted: 09/02/2021] [Indexed: 05/05/2023]
Abstract
Photocatalytic, sono-photocatalytic oxidation of pharmaceutical drug of carbamazepine was successfully carried out using Ag/AgCl supported BiVO4 catalyst. For this purpose, firstly, photocatalytic oxidation was optimized by central composite design methodology and then synergistic effect of sonication was investigated. Low frequency (20 kHz) probe type and high frequency (850 kHz) plate type sonication at pulse and continuous mode were studied to degrade the carbamazepine (CBZ) containing wastewater. Pulse duties of 1:5 and 5:1 (on : off) were tested using the high frequency sonication system in the sono-photocatalytic oxidation of CBZ. The effects of frequency, power density measured from calorimetry by changing amplitudes were discussed in the sono-photocatalytic oxidation of CBZ. Complete carbamazepine removal was achieved at the optimum conditions of 5 ppm CBZ initial concentration with 1.5 g/L of catalysts loading and at an alkaline pH of 10 at the end of 4 h of photocatalytic reaction under visible LED light irradiation. Both low frequency and high frequency sonication systems caused an increase in photocatalytic efficiency in a shorter treatment time of 60 min. CBZ removal increased from 44% to 65.42% in low frequency sonication of 20 kHz at the amplitude of 20% (0.15 W/mL power density). In the case of high frequency ultrasonic system (850 kHz), CBZ removal increased significantly from 44% to 89.5 % at 75% amplitude (0.12 W/mL power density) within 60 min of reaction. Continuous mode sonication was observed to be more effective than that of pulse mode sonication not only for degradation efficiency and also for electrical energy consumption needed to degrade CBZ. Sono-catalytic oxidation was also conducted with simulated wastewater that contains SO42-, CO32-, NO3-, Cl- anions and natural organic component of fulvic acid. The CBZ degradation was inhibited slightly in the presence of NO3- and Cl-, and fulvic acid, however, the existence of SO42- and CO32- increased the degradation degree of CBZ. Toxicity tests were performed to determine the toxicity of untreated CBZ, and treated CBZ by photocatalytic, and sono-photocatalytic oxidations.
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Affiliation(s)
- Gizem Yentür
- Ege University, Engineering Faculty, Chemical Engineering Department, 35100 Bornova, Izmir, Turkey
| | - Meral Dükkancı
- Ege University, Engineering Faculty, Chemical Engineering Department, 35100 Bornova, Izmir, Turkey.
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Dönmez Ö, Dükkancı M, Gündüz G. Effects of catalyst preparation method and reaction parameters on the ultrasound assisted Photocatalytic oxidation of reactive yellow 84 dye. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2020; 18:835-851. [PMID: 33312606 PMCID: PMC7721927 DOI: 10.1007/s40201-020-00507-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 06/22/2020] [Indexed: 06/12/2023]
Abstract
In this study, the Heterogeneous Sono-photocatalytic Process was used to degrade Reactive Yellow 84 (RY 84) dye dissolved in water over iron containing TiO2 and TiO2-Ce catalysts. The catalysts were prepared by sol-gel and incipient wetness impregnation methods and characterized using XRD, SEM, Nitrogen adsorption, UV-Vis DRS and ICP-AES measurements. The TiO2 catalyst containing 1% (in weight) iron, prepared by incipient wetness impregnation technique and calcined at 300 °C (1%Fe/TiO2-300 °C (IW)) was found to be the most effective catalyst. Parametric study was carried out over this catalyst and COD removal of 55% and TOC removal of 38% were achieved while the decolorization efficiency reached 100% after 45 min of reaction at the optimum conditions of, (25 mg/L of RY 84 solution, 0.5 g/L of catalyst, 5 mM of H2O2, a temperature of 25 °C, pH = 6 and US at a power of 40 W). Decolorization of RY 84 obeyed the first order kinetics with an activation energy of 20.7 kJ/mol. Sonication increased the decolorization efficiency of the heterogeneous Fenton process (UV + Catalyst+H2O2) from 92.7% to 97.5% after 30 min of reaction, with the COD and TOC reductions increasing from 87% to 90% and 48% to 57% after 120 min of reaction, respectively. US also decreased the toxicity of the RY 84 dye. The results obtained from this study show that, iron containing TiO2 and TiO2-Ce catalysts could be efficiently used in the hybrid process of ultrasound assisted heterogeneous photocatalytic oxidation in a wide range of experimental conditions.
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Affiliation(s)
- Özge Dönmez
- Ege University, Chemical Engineering Department, 35100 Bornova, İzmir, Turkey
| | - Meral Dükkancı
- Ege University, Chemical Engineering Department, 35100 Bornova, İzmir, Turkey
| | - Gönül Gündüz
- Ege University, Chemical Engineering Department, 35100 Bornova, İzmir, Turkey
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Chhabra VA, Kaur R, Walia MS, Kim KH, Deep A. PANI/PbS QD nanocomposite structure for visible light driven photocatalytic degradation of rhodamine 6G. ENVIRONMENTAL RESEARCH 2020; 186:109615. [PMID: 32668555 DOI: 10.1016/j.envres.2020.109615] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 06/11/2023]
Abstract
Among conducting polymers, polyaniline (PANI) is one of the most widely used materials due to its unique properties (e.g., high electrical conductivity, outstanding electrochemical properties, easy polymerization, high stability, and low-cost synthesis). In this study, we report the synthesis of a composite of polyaniline with lead sulfide quantum dots (PbS QDs), which was subsequently employed for photocatalysis of a dye, rhodamine 6G (Rh-6G). This PANI/PbS composite was prepared by employing the chemical oxidative polymerization of aniline monomer in the presence of PbS QDs. The composite has been characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and ultraviolet-visible spectroscopy. The composite formation turned out to be beneficial not only for the dispersion of PbS QDs but also for increasing the conductivity of the whole catalyst. They exhibited ~87% degradation of the dye content for 50 min. The kinetic rate for its destruction is 5.03 mmol g-1 h-1 with the quantum efficiency (QE) of 7.98E-06 molec/photon. Due to enhanced charge transfer characteristics, the PANI/PbS photocatalyst was capable of efficiently degrading the dye molecules across varying concentrations. The electron-hole pair generated after the visible light irradiation on the PANI/PbS composite led to an efficient oxidative degradation of Rh 6G.
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Affiliation(s)
- Varun A Chhabra
- Centre for Development of Advanced Computing (C-DAC), Phase VIII, Mohali, 160071, India
| | - Rajnish Kaur
- Department of Physics, Panjab University, Sector 14, Chandigarh, 160014, India
| | - Manrajvir S Walia
- Central Scientific Instruments Organization (CSIR-CSIO), Sector 30 C, Chandigarh, 160030, India
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763, Republic of Korea.
| | - Akash Deep
- Central Scientific Instruments Organization (CSIR-CSIO), Sector 30 C, Chandigarh, 160030, India
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Eco-Toxicological and Kinetic Evaluation of TiO2 and ZnO Nanophotocatalysts in Degradation of Organic Dye. Catalysts 2019. [DOI: 10.3390/catal9100871] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, the photocatalytic degradation of azo dye “Food Black 1” (FB1) was investigated using TiO2 and ZnO nanoparticles under ultraviolet (UV) light. The performances of the two photocatalysts were evaluated in terms of key parameters (e.g., decolorization, dearomatization, mineralization, and detoxification of dye) in relation to variables including pre-adsorption period, pH, and temperature. Under acidic conditions (pH 5), the ZnO catalyst underwent photocorrosion to increase the concentration of zinc ions in the system, thereby increasing the toxic properties of the treated effluent. In contrast, TiO2 efficiently catalyzed the degradation of the dye at pH 5 following the Langmuir–Hinshelwood (L–H) kinetic model. The overall results of this study indicate that the decolorization rate of TiO2 on the target dye was far superior to ZnO (i.e., by 1.5 times) at optimum catalyst loading under UV light.
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Cihanoğlu A, Gündüz G, Dükkancı M. Influence of ultrasound on the heterogeneous Fenton-like oxidation of acetic acid. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:2793-2801. [PMID: 29168719 DOI: 10.2166/wst.2017.416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The main objective of this study is to investigate the effect of ultrasound on the heterogeneous Fenton-like oxidation of acetic acid, which is one of the most resistant carboxylic acids to oxidation. For this purpose, firstly, the degradation of acetic acid was examined by using ultrasound alone and the effects of different parameters such as: type of sonication system, ultrasonic power, and addition of H2O2 were investigated on the degradation of acetic acid. There was no chemical oxygen demand (COD) reduction in the presence of sonication alone. In the presence of the heterogeneous Fenton-like oxidation process alone, at 303 K, COD reduction reached only 7.1% after 2 h of reaction. However, the combination of the heterogeneous Fenton-like oxidation process with ultrasound increased the COD reduction from 7.1% to 25.5% after 2 h of reaction in an ultrasonic bath operated at 40 kHz, while the COD reduction only increased from 7.1% to 8.9% in the ultrasonic reactor operated at 850 kHz. This result indicates that the hybrid process of ultrasound and heterogeneous Fenton-like oxidation is a promising process to degrade acetic acid.
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Affiliation(s)
- Aydın Cihanoğlu
- Faculty of Engineering, Department of Chemical Engineering, Ege University, İzmir 35100, Turkey E-mail:
| | - Gönül Gündüz
- Faculty of Engineering, Department of Chemical Engineering, Ege University, İzmir 35100, Turkey E-mail:
| | - Meral Dükkancı
- Faculty of Engineering, Department of Chemical Engineering, Ege University, İzmir 35100, Turkey E-mail:
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Molinari R, Lavorato C, Argurio P. Recent progress of photocatalytic membrane reactors in water treatment and in synthesis of organic compounds. A review. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.06.047] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rajoriya S, Bargole S, Saharan VK. Degradation of a cationic dye (Rhodamine 6G) using hydrodynamic cavitation coupled with other oxidative agents: Reaction mechanism and pathway. ULTRASONICS SONOCHEMISTRY 2017; 34:183-194. [PMID: 27773234 DOI: 10.1016/j.ultsonch.2016.05.028] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/15/2016] [Accepted: 05/18/2016] [Indexed: 05/15/2023]
Abstract
In the present study, decolorization and mineralization of a cationic dye, Rhodamine 6G (Rh6G), has been carried out using hydrodynamic cavitation (HC). Two cavitating devices such as slit and circular venturi were used to generate cavitation in HC reactor. The process parameters such as initial dye concentration, solution pH, operating inlet pressure, and cavitation number were investigated in detail to evaluate their effects on the decolorization efficiency of Rh6G. Decolorization of Rh6G was marginally higher in the case of slit venturi as compared to circular venturi. The kinetic study showed that decolorization and mineralization of the dye fitted first-order kinetics. The loadings of H2O2 and ozone have been optimized to intensify the decolorization and mineralization efficiency of Rh6G using HC. Nearly 54% decolorization of Rh6G was obtained using a combination of HC and H2O2 at a dye to H2O2 molar ratio of 1:30. The combination of HC with ozone resulted in 100% decolorization in almost 5-10min of processing time depending upon the initial dye concentration. To quantify the extent of mineralization, total organic carbon (TOC) analysis was also performed using various processes and almost 84% TOC removal was obtained using HC coupled with 3g/h of ozone. The degradation by-products formed during the complete degradation process were qualitatively identified by liquid chromatography-mass spectrometry (LC-MS) and a detailed degradation pathway has been proposed.
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Affiliation(s)
- Sunil Rajoriya
- Chemical Engineering Department, Malaviya National Institute of Technology, Jaipur 302017, India
| | - Swapnil Bargole
- Chemical Engineering Department, Malaviya National Institute of Technology, Jaipur 302017, India
| | - Virendra Kumar Saharan
- Chemical Engineering Department, Malaviya National Institute of Technology, Jaipur 302017, India.
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Rahimi S, Ayati B, Rezaee A. Kinetic modeling and determination role of sono/photo nanocatalyst-generated radical species on degradation of hydroquinone in aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:12185-12198. [PMID: 26971517 DOI: 10.1007/s11356-016-6408-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/02/2016] [Indexed: 06/05/2023]
Abstract
Experimental findings of sonophotocatalytic process were used in degradation of hydroquinone to assess kinetic modeling and determine the effect of various active radical species. First, the effects of three photocatalytic, sonocatalytic, and sonophotocatalytic processes were studied for hydroquinone removal to determine kinetic constants and calculate the activation energy of reactions, and then the selected process was evaluated to determine active radical species. The reactor was composed of two parts, one included ultrasonic probe (sonocatalytic part) with powers 22, 80, and 176 W and the second part was the location of UV lamp (photocatalytic part) with tubular flow and power 15 W. After three systems were examined and the efficient system was selected, the role of different active species such as hydroxyl radical (OH(·)), superoxide radical (O2 (·-)), hole (h(+)), electrons (e (-)), and single oxygen molecule ((1)O2) and contribution of each of them were determined in hydroquinone degradation. According to tests, the results of this study showed that sonophotocatalytic integrated method as selected system among three systems studied followed the first-order equation for hydroquinone degradation and active hydroxyl species with 45 % and electron and hole with 15 and 10 %, respectively, had the highest and lowest contributions to conversion of hydroquinone. The findings showed that dissolved oxygen increases the capability of active radical formation so that 28.2 % of hydroquinone removal was increased under aeration compared to without aeration. Also, removal efficiency decreased 62 % with N2 injection due to the withdrawal of oxygen from the sample. By adding 25 Mm of sodium azide (NaN3) to stock solution, 46.5 % reduction was developed because single oxygen ((1)O2) played the role of an active species. The advantages of integrated sonocatalytic and photocatalytic method are the generation of active radical species with more variety and ultimately the formation of higher amounts of powerful hydroxyl radical that increases degradation rates of refractory compounds and low-risk internal and final products. It has an appropriate performance in the degradation of refractory compounds by optimizing effective operational factors.
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Affiliation(s)
- Sajad Rahimi
- Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
| | - Bita Ayati
- Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran.
| | - Abbas Rezaee
- Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Torres-Luna JA, Carriazo JG, Sanabria NR. Delaminated montmorillonite with iron(III)-TiO₂ species as a photocatalyst for removal of a textile azo-dye from aqueous solution. ENVIRONMENTAL TECHNOLOGY 2015; 37:1346-1356. [PMID: 26586178 DOI: 10.1080/09593330.2015.1114031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A set of mesoporous delaminated montmorillonites containing iron(III)-titanium oxide species was synthesized using two minerals: a bentonite as support and an ilmenite as source of Fe-TiO2 species. Several values of both sulphuric acid concentration and temperature were employed to extract Fe-TiO2 species from an ilmenite. Analyses by X-ray fluorescence, X-ray diffraction, scanning electron microscopy and nitrogen adsorption-desorption confirmed the successful formation of delaminated (or exfoliated) mesoporous structures. Optical properties of solids were determined by UV-Vis diffuse reflectance spectroscopy, and their band gap energy values were also calculated. A small UV-shift of band gap values regarding that of commercial photo-active TiO2 was detected as consequence of the quantum size effect, suggesting that photocatalytic experiments should be performed under UV-radiation assistance. The synthesized solids showed good activity in the photocatalytic oxidation of a textile dye (reactive yellow 145: RY 145), achieving conversions higher than 70% and chemical oxygen demand removal between 60% and 80%.
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Affiliation(s)
- Juan A Torres-Luna
- a Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias , Universidad Nacional de Colombia , Bogotá , Colombia
| | - José G Carriazo
- a Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias , Universidad Nacional de Colombia , Bogotá , Colombia
| | - Nancy R Sanabria
- a Estado Sólido y Catálisis Ambiental (ESCA), Departamento de Química, Facultad de Ciencias , Universidad Nacional de Colombia , Bogotá , Colombia
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Synthesis of Fe2O3–TiO2/fly-ash-cenosphere composite and its mechanism of photocatalytic oxidation under visible light. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2236-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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