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Tang Q, Liu C, Lv D, Zhao L, Jiang L, Wang J. Biotemplated Fe/La-co-doped TiO 2 for photocatalytic depth treatment of compressed leachate from refuse transfer station. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33870-1. [PMID: 38837031 DOI: 10.1007/s11356-024-33870-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 05/27/2024] [Indexed: 06/06/2024]
Abstract
Compressed leachate is a contaminated liquid containing various organic and inorganic pollutants produced in municipal refuse transfer stations, which pollute soil and groundwater, posing serious risks to the environment and human health. The Environmental Technology Co., Ltd. (Shenzhen, Guangdong Province, South China) treated compressed leachate obtained from a refuse transfer station. The chemical oxygen demand (COD) (641.2 mg/L) of treated compressed leachate did not meet the wastewater quality standards in China for discharge into municipal sewers (COD ≤ 500 mg/L) and the company's design discharge requirements (COD ≤ 400 mg/L). Therefore, their further in-depth treatment is necessary. To this end, waste tobacco leaves were used as the biotemplate herein, and Fe/La-co-doped TiO2 (xFe,yLa)-TTiO2(g) was synthesized using a solvothermal-assisted biotemplating method. The photocatalytic depth treatment of compressed leachate was performed under simulated solar light using the prepared catalysts. After (3Fe,3La)-TTiO2(g) treatment, the COD of the leachate decreased from 641.2 to 280.1 mg/L, and the COD removal rate was 1.2, 1.1, and 1.6 times higher than that of pure Fe-doped, La-doped and non-biological template TiO2, respectively. Characterization confirmed that the biological template endowed the catalyst with a unique morphology and high specific surface area. Its rich activity sites are conducive to enhancing the adsorption capacity of pollutants and providing an ideal place for photocatalytic reactions. Co-doping with iron and lanthanum ions altered the band structure of TiO2 and promoted the interconversion of Fe3+/Fe2+ and La3+/La2+ during photocatalysis. First-principles density functional theory simulations demonstrated that co-doping Fe and La in TiO2 created impurity levels that facilitated the transfer of photogenerated electrons. This study provides a new purification pathway for the depth treatment of compressed leachate.
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Affiliation(s)
- Qinyuan Tang
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Chang Liu
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Die Lv
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Lixia Zhao
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China
| | - Liang Jiang
- School of Engineering, Yunnan University, Kunming, 650091, People's Republic of China
| | - Jiaqiang Wang
- School of Chemical Sciences and Engineering, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, People's Republic of China.
- School of Materials and Energy, Yunnan University, Kunming, 650091, People's Republic of China.
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Yang Y, Guo J, Zhao Z, Yang J, Cao J, Zhang Q, Liu S. Efficient removal of Hg 0 from cement kiln flue gas using Ce xFe yO z composite catalyst. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:79821-79834. [PMID: 37261688 DOI: 10.1007/s11356-023-27781-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/16/2023] [Indexed: 06/02/2023]
Abstract
In this study, a kind of CexFeyOz composite with oxygen vacancy structure and strong oxygen storage capacity was prepared by coprecipitation method. Under the condition of no HCl of flue gas, the Hg0 in the flue gas of cement kiln was efficiently and economically removed by using 6-8% oxygen. The results showed that the optimum preparation conditions of the catalyst were Ce-Fe molar ratio of 1-11 and calcination temperature of 550 °C. In addition, the reaction temperature, space velocity, the concentration of O2, SO2, and NO had significant effects on the removal efficiency of Hg0 at different rates. More precisely, at the reaction temperature of 350 °C, low airspeed, high concentration of O2, and low concentration of SO2 and NO, the efficiency reached the highest value. According to XPS results, the elemental valence of the CexFeyOz composite changed after the reaction. The redox pairs of Ce3+-Ce4+ and Fe3+-Fe2+ had the ability to transfer electrons, which enabled more oxygen adsorbed on the catalyst surface to be converted into O2-, leading to the improvement of the oxidation efficiency of Hg0.
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Affiliation(s)
- Yiting Yang
- College of Resources and Environment, China-Serbia "The Belt and Road" Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China
| | - Junyuan Guo
- College of Resources and Environment, China-Serbia "The Belt and Road" Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China
| | - Ziyu Zhao
- College of Resources and Environment, China-Serbia "The Belt and Road" Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China
| | - Jie Yang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, China
| | - Jing Cao
- College of Resources and Environment, China-Serbia "The Belt and Road" Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China
| | - Qiang Zhang
- College of Resources and Environment, China-Serbia "The Belt and Road" Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China
| | - Shengyu Liu
- College of Resources and Environment, China-Serbia "The Belt and Road" Joint Laboratory on Environment and Energy, Chengdu University of Information Technology, Chengdu, 610225, Sichuan, China.
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Li J, Yang Y, Han Z, Huang Y, Yuan H, Ni C. Catalytic degradation of "trinitrogen" by Fe-Ce-SiO 2 /TiO 2 aerogel. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:49577-49590. [PMID: 36781672 DOI: 10.1007/s11356-023-25795-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 02/04/2023] [Indexed: 04/16/2023]
Abstract
The "trinitrogen" [ammonia nitrogen (NH4+ - N), nitrate nitrogen (NO3- - N), and nitrite nitrogen (NO2- - N)] from industrial or domestic wastewater can lead to eutrophication of water bodies. When ammonia nitrogen is converted into nitrate nitrogen, it will cause high nitrogen oxygen demand, which will also lead to hyperammonemia. High nitrite content in water bodies will increase the risk of human cancer. In this paper, Fe-Ce bimetallic-doped composites (Fe-Ce/SiO2 and Fe-Ce-SiO2/TiO2) were synthesized using SiO2 aerogel as a carrier for the adsorption and degradation of "three nitrogen."SiO2/TiO2 was prepared by dipping method, and Fe and Ce bimetals were loaded on the surface of SiO2/TiO2 material, and the effect of photo-Fenton oxidation on the degradation rate of three nitrogen under different materials was explored. The results showed that when the dosage of catalyst was 0.01 g, pH value was 11.0, and the concentration of H2O2 was 80 mmol/L, the photocatalytic efficiency was the best, and the degradation efficiency of three nitrogen remained above 70%.
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Affiliation(s)
- Jie Li
- School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, People's Republic of China
| | - Yuxiang Yang
- School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, People's Republic of China.
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716, USA.
| | - Zhiyong Han
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu, 610059, People's Republic of China
| | - Yan Huang
- School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, People's Republic of China
| | - Hongming Yuan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012, People's Republic of China
| | - Chaoying Ni
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716, USA
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Kamari V, Sharma A, Kumar N, Sillanpää M, Makgwane PR, Ahmaruzzaman M, Hosseini-Bandegharaei A, Rani M, Chinnumuthu P. TiO2-CeO2 assisted heterostructures for photocatalytic mitigation of environmental pollutants: A comprehensive study on band gap engineering and mechanistic aspects. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Ge T, Guo H, Zuo C, Zheng Y, Li S, Huang H, Wang M, Cui G, Guo X, Li Y. Synthesis, characterization, catalytic performance of magnetically recoverable nano-Au/MCeOx (M: Fe, Co and Ni) in direct oxidative esterification of methacrolein and methanol. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fauzi AA, Jalil AA, Hassan NS, Aziz FFA, Azami MS, Abdullah TAT, Kamaroddin MFA, Setiabudi HD. An intriguing Z-scheme titania loaded on fibrous silica ceria for accelerated visible-light-driven photocatalytic degradation of ciprofloxacin. ENVIRONMENTAL RESEARCH 2022; 211:113069. [PMID: 35300961 DOI: 10.1016/j.envres.2022.113069] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/02/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
A novel Z-scheme titania loaded on fibrous silica ceria (Ti-FSC) was triumphantly fabricated via hydrothermal followed by electrolysis method and evaluated for the visible-light degradation of ciprofloxacin (CIP). Noticeably, Ti-FSC exhibits as an efficient photocatalyst for CIP photodegradation with 95% as followed by titania loaded on fibrous silica (Ti-FS) (68%), Ti-CeO2 (35%), FSC (47%), FS (22%), and CeO2 (17%). The combination of the inherent merits of Ti loaded on FSC is able to realize the crucial role of Ce in harnessing the high dispersion of Ti, which could beneficial for improving the performance proven by XRD, FESEM, TEM and FTIR. Consequently, high dispersion of Ti on FSC has worthwhile towards the interaction of the Si-O-Ti, Ce-O-Ti, and Si-O-Ti, which could enhance the CIP photodegradation by providing more surface defects, narrowing the band gap, improving electron-hole separation and suppressing electron-hole recombination that revealed by XPS, UV-vis/DRS, Nyquist plots and PL studies, respectively. The scavenger study revealed that the controlling species in the system was hydroxyl radical and holes. A potential Z-scheme heterojunction mechanism for Ti-FSC was deduced from the band structure analysis. The possible photodegradation pathway was proposed based on GCMS analysis. Besides, the acceptable reusability, which exceeded 90% of degradation indicated the great application potential of Z-scheme Ti-FSC in wastewater treatment and others application.
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Affiliation(s)
- A A Fauzi
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - A A Jalil
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia.
| | - N S Hassan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - F F A Aziz
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - M S Azami
- Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Malaysia
| | - T A T Abdullah
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - M F A Kamaroddin
- Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - H D Setiabudi
- Faculty of Chemical and Process Engineering Technology, College of Engineering Technology, Universiti Malaysia Pahang, 26300, Gambang, Kuantan, Pahang, Malaysia
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Cáceres-Hernández A, Torres-Torres JG, Silahua-Pavón A, Godavarthi S, García-Zaleta D, Saavedra-Díaz RO, Tavares-Figueiredo R, Cervantes-Uribe A. Facile Synthesis of ZnO-CeO 2 Heterojunction by Mixture Design and Its Application in Triclosan Degradation: Effect of Urea. NANOMATERIALS 2022; 12:nano12121969. [PMID: 35745314 PMCID: PMC9230812 DOI: 10.3390/nano12121969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 11/19/2022]
Abstract
In this study, simplex centroid mixture design was employed to determine the effect of urea on ZnO-CeO. The heterojunction materials were synthesized using a solid-state combustion method, and the physicochemical properties were evaluated using X-ray diffraction, nitrogen adsorption/desorption, and UV–Vis spectroscopy. Photocatalytic activity was determined by a triclosan degradation reaction under UV irradiation. According to the results, the crystal size of zinc oxide decreases in the presence of urea, whereas a reverse effect was observed for cerium oxide. A similar trend was observed for ternary samples, i.e., the higher the proportion of urea, the larger the crystallite cerium size. In brief, urea facilitated the co-existence of crystallites of CeO and ZnO. On the other hand, UV spectra indicate that urea shifts the absorption edge to a longer wavelength. Studies of the photocatalytic activity of TCS degradation show that the increase in the proportion of urea favorably influenced the percentage of mineralization.
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Affiliation(s)
- Antonia Cáceres-Hernández
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | - Jose Gilberto Torres-Torres
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | - Adib Silahua-Pavón
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | - Srinivas Godavarthi
- Investigadoras e Investigadores por México—División Académica de Ciencias Básicas, Universidad Juárez Autónoma de Tabasco, Villahermosa 86690, TB, Mexico;
| | - David García-Zaleta
- División Académica Multidisciplinaria de Jalpa de Méndez, Carretera Cunduacán–Jalpa de Méndez, Universidad Juárez Autónoma de Tabasco, km 1, Col. La Esmeralda, Villahermosa 86690, TB, Mexico;
| | - Rafael Omar Saavedra-Díaz
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
| | | | - Adrián Cervantes-Uribe
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Universidad Juárez Autónoma de Tabasco, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. Cunduacán 86690, TB, Mexico; (A.C.-H.); (J.G.T.-T.); (A.S.-P.); (R.O.S.-D.)
- Correspondence: ; Tel.: +52-553-143-9893
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Cortez-Elizalde J, Cuauhtémoc-López I, Guerra-Que Z, Espinosa de los Monteros AE, Lunagómez-Rocha MA, Silahua-Pavón AA, Arévalo-Pérez JC, Cordero-García A, Cervantes-Uribe A, Torres-Torres JG. Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al 2O 3-CeO 2-TiO 2 Nanomaterials. MATERIALS (BASEL, SWITZERLAND) 2021; 14:5470. [PMID: 34639867 PMCID: PMC8509746 DOI: 10.3390/ma14195470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/11/2021] [Accepted: 09/15/2021] [Indexed: 11/24/2022]
Abstract
NiWAu trimetallic nanoparticles (NPs) on the surface of support Al2O3-CeO2-TiO2 were synthesized by a three-step synthetic method in which Au NPs were incorporated into presynthesized NiW/Al2O3-CeO2-TiO2. The recharge method, also known as the redox method, was used to add 2.5 wt% gold. The Al2O3-CeO2-TiO2 support was made by a sol-gel method with two different compositions, and then two metals were simultaneously loaded (5 wt% nickel and 2.5 wt% tungsten) by two different methods, incipient wet impregnation and ultrasound impregnation method. In this paper, we study the effect of Au addition using the recharge method on NiW nanomaterials supported on mixed oxides on the physicochemical properties of synthesized nanomaterials. The prepared nanomaterials were characterized by scanning electron microscopy, BET specific surface area, X-ray diffraction, diffuse reflectance spectroscopy in the UV-visible range and temperature-programmed desorption of hydrogen. The experimental results showed that after loading of gold, the dispersion was higher (46% and 50%) with the trimetallic nanomaterials synthesized by incipient wet impregnation plus recharge method than with impregnation plus ultrasound recharge method, indicating a greater number of active trimetallic (NiWAu) sites in these materials. Small-sized Au from NiWAu/ACTU1 trimetallic nanostructures was enlarged for NiWAu/ACT1. The strong metal NPs-support interaction shown for the formation of NiAl2O4, Ni-W-O and Ni-Au-O species simultaneously present in the surface of trimetallic nanomaterial probably plays an important role in the degree of dispersion of the gold active phase.
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Affiliation(s)
- Jorge Cortez-Elizalde
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Ignacio Cuauhtémoc-López
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Zenaida Guerra-Que
- Laboratorio de Investigación 1 Área de Nano-Tecnología, Tecnológico Nacional de México Campus Villahermosa, Km. 3.5 Carretera Villahermosa–Frontera, Cd. Industrial, Villahermosa 86010, Tabasco, Mexico;
| | - Alejandra Elvira Espinosa de los Monteros
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Ma. Antonia Lunagómez-Rocha
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Adib Abiu Silahua-Pavón
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Juan Carlos Arévalo-Pérez
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Adrián Cordero-García
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Adrián Cervantes-Uribe
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - José Gilberto Torres-Torres
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
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Pino-Ramos VH, Bucio E, Díaz D. Fast photocatalytic polypropylene degradation by nanostructured bismuth catalysts. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109648] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Fanming Meng, Wu H, Gao C. Hydrothermal Synthesis of Monocrystalline CeO2 Polymeric Nano-Balls and Their Optical Properties. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s003602442104018x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Huang Z, Li L, Li Z, Li H, Wu J. Synthesis of Novel Kaolin-Supported g-C 3N 4/CeO 2 Composites with Enhanced Photocatalytic Removal of Ciprofloxacin. MATERIALS 2020; 13:ma13173811. [PMID: 32872322 PMCID: PMC7503662 DOI: 10.3390/ma13173811] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/23/2020] [Accepted: 08/26/2020] [Indexed: 01/30/2023]
Abstract
Herein, novel ternary kaolin/CeO2/g-C3N4 composite was prepared by sol-gel method followed by hydrothermal treatment. The self-assembled 3D “sandwich” structure consisting of kaolin, CeO2 and g-C3N4 nanosheets, was systematically characterized by appropriate techniques to assess its physicochemical properties. In the prerequisite of visible-light irradiation, the removal efficiency of ciprofloxacin (CIP) over the kaolin/CeO2/g-C3N4 composite was about 90% within 150 min, 2-folds higher than those of pristine CeO2 and g-C3N4. The enhanced photocatalytic activity was attributed to the improved photo-induced charge separation efficiency and the large specific surface area, which was determined by electrochemical measurements and N2 physisorption methods, respectively. The synergistic effect between the kaolin and CeO2/g-C3N4 heterostructure improved the photocatalytic performance of the final solid. The trapping and electron paramagnetic resonance (EPR) experiments demonstrated that the hole (h+) and superoxide radicals (•O2−) played an important role in the photocatalytic process. The photocatalytic mechanism for CIP degradation was also proposed based on experimental results. The obtained results revealed that the kaolin/CeO2/g-C3N4 composite is a promising solid catalyst for environmental remediation.
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Affiliation(s)
- Zhiquan Huang
- College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China; (Z.H.); (Z.L.); (H.L.); (J.W.)
- Luoyang Institute of Science and Technology, Luoyang 471023, Henan, China
| | - Leicheng Li
- College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China; (Z.H.); (Z.L.); (H.L.); (J.W.)
- Correspondence:
| | - Zhiping Li
- College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China; (Z.H.); (Z.L.); (H.L.); (J.W.)
| | - Huan Li
- College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China; (Z.H.); (Z.L.); (H.L.); (J.W.)
| | - Jiaqi Wu
- College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, Henan, China; (Z.H.); (Z.L.); (H.L.); (J.W.)
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12
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Xie X, Li L, Ye S, Zhang Q, Chen X, Huang X. Photocatalytic degradation of ethylene by TiO2 nanotubes/ reduced graphene oxide prepared by gamma irradiation. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Eshaq G, Wang S, Sun H, Sillanpaa M. Superior performance of FeVO 4@CeO 2 uniform core-shell nanostructures in heterogeneous Fenton-sonophotocatalytic degradation of 4-nitrophenol. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121059. [PMID: 31470302 DOI: 10.1016/j.jhazmat.2019.121059] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 08/14/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
Porous FeVO4 nanorods decorated on CeO2 nanocubes (FeVO4@CeO2) were successfully prepared via a facile hydrothermal route and tested in the degradation of 4-nitrophenol (4-NP) for enhanced heterogeneous oxidation using ultrasonic (US), ultraviolet (UV), and binary irradiation US/UV, respectively. The nanostructure of the core-shell FeVO4@CeO2 was characterised using XRD, SEM, EDS elemental mapping, TEM, HRTEM, SAED, FTIR, Raman, BET, point of zero charge (PZC), XPS analysis and UV-vis DRS. The effect of various parameters, for examples, nanostructured core-shell amounts, hydrogen peroxide concentration, initial concentration, pH and irradiation time, on 4-NP degradation were investigated for the optimisation of the catalytic performance. The durability and stability of the core-shell nanostructured materials were also investigated and the obtained results revealed that the catalysts can endure the harsh sonophotocatalytic conditions even after six cycles. Mineralisation experiments were investigated using the optimised parameters. The core-shell nanostructured FeVO4@CeO2 has higher PZC than pure FeVO4 and CeO2, leading to excellent sonophotocatalytic activity even at high pH and stability for the degradation of 4-NP after six cycles. A possible mechanism over the FeVO4@CeO2 was proposed based on the special three-way Fenton-like mechanism and the dissociation of H2O2 with the experiments of active species trapping and calculated band gap energy.
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Affiliation(s)
- Gh Eshaq
- Department of Green Chemistry (DGC), School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130, Mikkeli, Finland; Petrochemicals department, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
| | - Shaobin Wang
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Hongqi Sun
- School of Engineering, Edith Cowan University, Perth, WA 6027, Australia
| | - Mika Sillanpaa
- Department of Green Chemistry (DGC), School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130, Mikkeli, Finland
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14
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Eshaq G, Wang S, Sun H, Sillanpää M. Core/shell FeVO4@BiOCl heterojunction as a durable heterogeneous Fenton catalyst for the efficient sonophotocatalytic degradation of p-nitrophenol. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115915] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Xie X, Li L, Ye S, Zhang Q, Chen X, Huang X. Photocatalytic degradation of ethylene by TiO2 nanotubes/ reduced graphene oxide prepared by gamma irradiation. Radiat Phys Chem Oxf Engl 1993 2019. [DOI: 10.1016/j.radphyschem.2019.108371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Shih YJ, Huang CP, Chan YH, Huang YH. Electrochemical degradation of oxalic acid over highly reactive nano-textured γ- and α-MnO 2/carbon electrode fabricated by KMnO 4 reduction on loofah sponge-derived active carbon. JOURNAL OF HAZARDOUS MATERIALS 2019; 379:120759. [PMID: 31238219 DOI: 10.1016/j.jhazmat.2019.120759] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 06/09/2019] [Accepted: 06/10/2019] [Indexed: 06/09/2023]
Abstract
Manganese dioxide incorporated activated carbon (MnO2/AC) was synthesized and used to electrochemically degrade oxalic acid in aqueous solutions. The highly porous carbon provided reactive sites for the electro-sorption of oxalic acid and MnO2, with a specific polymorphism efficiently mediating the electron transfer between the electrode and organic pollutants. The activated carbon, made from the pyrolysis of dry loofah sponge using ZnCl2 as activating agent, exhibited a high double-layer capacitance dependent upon the heating temperature (100 F/g at 800 °C). The γ-MnO2 was in-situ deposited over the microporous structure of activated carbon through the redox reaction between KMnO4 and carbon. Simple further calcination converted γ-MnO2 to α-MnO2 nano-whisker at temperatures above 500 °C. Cyclic voltammetry showed that oxalic acid significantly improved the anodic current of the Mn(III)/Mn(IV) redox couple on the MnO2/AC electrode at an electrode potential around + 0.6 V (vs. Ag/AgCl). About 95% of oxalic acid degradation was achieved at pH < 4; meanwhile, 80% of the mineralization (total organic carbon removal) was attained independent of pH. Calcination converted γ-MnO2 to α-MnO2 which had higher electrochemical stability and inhibited the dissolution of Mn(II) from the electrode.
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Affiliation(s)
- Yu-Jen Shih
- Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
| | - Chin-Pao Huang
- Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA
| | - Ya-Han Chan
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Yao-Hui Huang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan; Sustainable Environment Research Center, National Cheng Kung University, Tainan 701, Taiwan.
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17
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SiO 2/TiO 2 Composite Coating on Light Substrates for Photocatalytic Decontamination of Water. J CHEM-NY 2019. [DOI: 10.1155/2019/2634398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In this study, we describe synthesis and characterization of a floating photocatalyst for water treatment consisting of a light substrate coated by SiO2/TiO2 composite. Three supports of natural origin were used: natural cork, expanded clay (Liapor), and volcanic porous glass (Sorbix). The photoactivity of the coated supports was tested in a laboratory photoreactor, with Liapor being the most photoactive support with good mechanical stability. The corresponding rate constant for the degradation of a model pollutant, 4-chlorophenol, was 7.8 × 10−5 s−1. Detail characterization of the coated Liapor was obtained by XRF, SEM/EDX, and UV-Vis diffuse reflectance spectroscopy, and surface area measurements. Outdoor experiments were carried out with calcined Liapor and oxalic acid or methylene blue under sunlight on pilot reactors in the Czech Republic and Vietnam. We demonstrated satisfactory photocatalytic activity, long-term stability, and reusability of the new floating photocatalyst. The photoefficiency to mineralize oxalic acid in water under sunlight was estimated as 6.7% under the applied conditions.
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Ma R, Zhang S, Wen T, Gu P, Li L, Zhao G, Niu F, Huang Q, Tang Z, Wang X. A critical review on visible-light-response CeO2-based photocatalysts with enhanced photooxidation of organic pollutants. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.11.016] [Citation(s) in RCA: 170] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Rashid J, Parveen N, Iqbal A, Awan SU, Iqbal N, Talib SH, Hussain N, Akram B, Ulhaq A, Ahmed B, Xu M. Facile synthesis of g-C 3N 4(0.94)/CeO 2(0.05)/Fe 3O 4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol. Sci Rep 2019; 9:10202. [PMID: 31308407 PMCID: PMC6629633 DOI: 10.1038/s41598-019-46544-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 07/01/2019] [Indexed: 11/10/2022] Open
Abstract
Visible light active g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) ternary composite nanosheets were fabricated by facile co-precipitation routes. The density functional theory (DFT) computations investigated changes in geometry and electronic character of g-C3N4 with CeO2 and Fe3O4 addition. Chemical and surface characterizations were explored with XRD, XPS, SEM, TEM, PL, DRS and Raman measurements. DRS and PL spectroscopy evidenced the energy band gap tailoring from 2.68 eV for bulk g-C3N4 and 2.92 eV for CeO2 to 2.45 eV for the ternary nanocomposite. Efficient electron/hole pair separation, increase in red-ox species and high exploitation of solar spectrum due to band gap tailoring lead to higher degradation efficiency of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01). Superior sun light photocatalytic breakdown of 2-Chlorophenol was observed with g-C3N4 having CeO2 loading up to 5 wt%. In case of ternary nanocomposites deposition of 1 wt% Fe3O4 over g-C3N4/CeO2 binary composite not only showed increment in visible light catalysis as predicted by the DFT studies, but also facilitated magnetic recovery. The g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets showed complete mineralization of 25 mg.L-1 2-CP(aq) within 180 min exposure to visible portion of sun light and retained its high activity for 3 consecutive reuse cycles. The free radical scavenging showed superoxide ions and holes played a significant role compared to hydroxyl free radicals while chromatographic studies helped establish the 2-CP degradation mechanism. The kinetics investigations revealed 2.55 and 4.04 times increased rate of reactions compared to pristine Fe3O4 and CeO2, showing highest rate constant value of 18.2 × 10-3 min-1 for the ternary nanocomposite. We present very persuasive results that can be beneficial for exploration of further potential of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) in advance wastewater treatment systems.
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Affiliation(s)
- Jamshaid Rashid
- Department of Environmental Science, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Keifeng, 475004, China.
| | - Nadia Parveen
- Department of Environmental Science, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Aneela Iqbal
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Keifeng, 475004, China
| | - Saif Ullah Awan
- Department of Electrical Engineering, NUST College of Electrical and Mechanical Engineering, National University of Science and Technology (NUST), Islamabad, 54000, Pakistan
| | - Naseem Iqbal
- US-Pakistan Centre for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology, Islamabad, Pakistan
| | | | - Naveed Hussain
- State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing, P.R. China
| | - Bilal Akram
- Department of Chemistry, Tsinghua University, Beijing, 100084, P.R. China
| | - Ata Ulhaq
- Department of Physics, Lahore University of Management Sciences (LUMS), Lahore, 54792, Pakistan
| | - Bilal Ahmed
- Department of Physics, Lahore University of Management Sciences (LUMS), Lahore, 54792, Pakistan
| | - Ming Xu
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Keifeng, 475004, China.
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Humayun M, Hu Z, Khan A, Cheng W, Yuan Y, Zheng Z, Fu Q, Luo W. Highly efficient degradation of 2,4-dichlorophenol over CeO 2/g-C 3N 4 composites under visible-light irradiation: Detailed reaction pathway and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2019; 364:635-644. [PMID: 30396137 DOI: 10.1016/j.jhazmat.2018.10.088] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/27/2018] [Accepted: 10/29/2018] [Indexed: 05/14/2023]
Abstract
Herein, we report for the first time the highly efficient degradation of 2,4-dichlorophenol (2,4-DCP) over CeO2/g-C3N4 composites (xCeO/CN) prepared via wet-chemical solution method. It is shown that the resultant nanocomposites with a proper mass ratio percentage (15%) of CeO coupled exhibit greatly enhanced visible-light activity for 2,4-dichlorophenol (2,4-DCP) degradation compared to the bare g-C3N4. From photoluminescence (PL) and Fluorescence (FL) results, it is suggested that enhanced photo-degradation is attributed to the significantly improved charge separation and transfer as a result of the proper band alignments between g-C3N4 and CeO components. Further, from radical trapping experiments, it is confirmed that hydroxyl radicals (OH) are the predominant oxidants involved in the degradation of 2,4-DCP over CeO/CN composites. Furthermore, a possible reaction pathway and detailed photocatalytic mechanism for 2,4-DCP degradation is proposed mainly based on the detected liquid chromatography tandem mass spectrometry (LC-MS) intermediate products, that readily transform into CO2 and H2O. This work would help researchers to deeply understand the reaction mechanism of 2,4-DCP and would provide feasible routes to fabricate g-C3N4-based highly efficient photocatalysts for environmental remediation.
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Affiliation(s)
- Muhammad Humayun
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Zhewen Hu
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Abbas Khan
- Department of Chemistry, Abdul Wali Khan University Mardan, 23200, KP, Pakistan
| | - Wei Cheng
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Yang Yuan
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Zhiping Zheng
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Qiuyun Fu
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Wei Luo
- Engineering Research Center for Functional Ceramics of the Ministry of Education, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
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Wang X, Patel R, Liang X. Significant improvement in TiO2 photocatalytic activity through controllable ZrO2 deposition. RSC Adv 2018; 8:25829-25834. [PMID: 35539760 PMCID: PMC9082663 DOI: 10.1039/c8ra03423k] [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: 04/21/2018] [Accepted: 07/06/2018] [Indexed: 01/23/2023] Open
Abstract
ZrO2 was deposited on anatase TiO2 nanoparticles using 5–80 cycles of atomic layer deposition (ALD). The photocatalytic activity of all samples was evaluated based on the degradation of methylene blue (MB) solution under UV light. The TiO2 sample with 45 cycles of ZrO2 deposition (45c-Zr/TiO2, 1.1 wt% ZrO2) was proved to be the most efficient catalyst with a degradation kinetic constant 10 times larger than that of the pure TiO2 sample. All samples were characterized using inductively coupled plasma atomic emission spectroscopy (ICP-AES), nitrogen adsorption–desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra analysis (UV-DRS), Raman and photoluminescence (PL) techniques. The high photocatalytic activity of 45c-Zr/TiO2 can be attributed to stronger adsorption in the ultraviolet region and a reduction in the recombination rate of electron/hole pairs. The photocatalytic activity of ZrO2 deposited anatase TiO2 nanoparticles was evaluated based on the degradation of methylene blue solution under UV light.![]()
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Affiliation(s)
- Xiaofeng Wang
- Department of Chemical and Biochemical Engineering
- Missouri University of Science and Technology
- Rolla
- USA
| | - Rajankumar L. Patel
- Department of Chemical and Biochemical Engineering
- Missouri University of Science and Technology
- Rolla
- USA
| | - Xinhua Liang
- Department of Chemical and Biochemical Engineering
- Missouri University of Science and Technology
- Rolla
- USA
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TiO2 supported gold nanoparticles: An efficient photocatalyst for oxidation of alcohol to aldehyde and ketone in presence of visible light irradiation. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Promoting the oxidative removal rate of 2,4-dichlorophenoxyacetic acid on gold-doped WO3/TiO2/reduced graphene oxide photocatalysts under UV light irradiation. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.10.022] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Cyclohexane photooxidation under visible light irradiation by WO3–TiO2 mixed catalysts. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3124-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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