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T R, Rajni KS, D K, José SE, Granados-Tavera K, Jiron GC, Shobana M, Meher SR. Exploring Structural and Optical Properties of Iodine-Doped TiO 2 Nanoparticles in Rhodamine-B Dye Degradation: Experimental and Theoretical Investigation. CHEMOSPHERE 2024:143183. [PMID: 39214412 DOI: 10.1016/j.chemosphere.2024.143183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 08/19/2024] [Accepted: 08/23/2024] [Indexed: 09/04/2024]
Abstract
Energy conversion and pollutant degradation are critical for advancing sustainable technologies, yet they often encounter challenges related to charge recombination and efficiency limitations. This study explores iodine-doped TiO2 nanoparticles as a potential solution for enhancing both energy conversion and pollutant degradation. The nanoparticles were synthesized via the sol-gel method with varying iodine precursor concentrations (0.025 to 0.1 M) and were characterized for their structural, compositional, and optical properties, particularly in relation to their photocatalytic performance in Rhodamine-B dye degradation. X-ray diffraction confirmed a tetragonal anatase crystal structure, with the average crystallite size decreasing from 10.06 nm to 8.82 nm with increase in iodine concentration. Selected area electron diffraction patterns verified the polycrystalline nature of the nanoparticles. Dynamic light scattering analysis showed hydrodynamic radii ranging from 95 to 125 nm. Fourier-transform infrared spectroscopy identified metal-oxygen vibrations at 441 cm⁻1, and electron microscopy confirmed the spherical morphology of the nanoparticles. Elemental analysis detected the presence of Ti, O, and I in the samples. Diffuse reflectance spectroscopy indicated the optical absorption edges for the doped samples in the visible region from which the corresponding band gap values were deduced. Photoluminescence spectroscopy revealed that the sample with 0.1 M iodine exhibit the lowest emission intensity, suggesting reduced charge recombination. Notably, 0.1 M iodine doped TiO2 samples demonstrated the highest photocatalytic efficiency, achieving 82.36% degradation of Rhodamine-B dye within 140 minutes under visible light. Additionally, ab-initio density functional theory calculations were performed to investigate the structural, optical, and adsorption properties of TiO2, iodine-doped TiO2, Rhodamine-B, and their composites, providing further insight into the enhanced photocatalytic activity observed in the experiments.
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Affiliation(s)
- Raguram T
- Centre for Advanced Functional Nanomaterials, Chennai Institute of Technology, Chennai - 600 069, Tamil Nadu, India
| | - K S Rajni
- Department of Sciences, Amrita School of Physical Sciences, Coimbatore, Amrita Vishwa Vidyapeetham, India; Functional Materials Laboratory, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India.
| | - Kanchana D
- Department of Computer Science and Applications, SRM Institute of Science and Technology, Ramapuram Campus, Chennai, Tamil Nadu, India
| | - Solar-Encinas José
- Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), Santiago, Chile
| | | | - Gloria Cardenas Jiron
- Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), Santiago, Chile.
| | - M Shobana
- Centre for Advanced Functional Nanomaterials, Chennai Institute of Technology, Chennai - 600 069, Tamil Nadu, India
| | - S R Meher
- Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, 632 014, India
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Zhao Y, Shu Y, Linghu X, Liu W, Di M, Zhang C, Shan D, Yi R, Wang B. Modification engineering of TiO 2-based nanoheterojunction photocatalysts. CHEMOSPHERE 2024; 346:140595. [PMID: 37951392 DOI: 10.1016/j.chemosphere.2023.140595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 09/27/2023] [Accepted: 10/29/2023] [Indexed: 11/14/2023]
Abstract
Titanium dioxide (TiO2)-based photocatalysts have gained increasing attention for their versatile applications in organic degradation, hydrogen production, air purification, and CO2 reduction. Various TiO2-based heterojunction structures, including type I, type II, Schottky junction, Z-scheme, and S-scheme, have been extensively studied. The current research frontier is centered on the engineering modifications of TiO2-based nanoheterojunction photocatalysts, such as defect engineering, morphological engineering, crystal phase/facet engineering, and multijunction engineering. These modifications enhance carrier transport, separation, and light absorption, thereby improving the photocatalytic performance. Remarkably, this aspect has been less addressed in existing reviews. This review aims to fill this gap by focusing on the engineering modifications of TiO2-based nanoheterojunction photocatalysts. We delve into specific topics like oxygen vacancies, n-p homojunctions, and double defects. The review also systematically discusses the applications of multidimensional heterojunctions and examines carrier transport pathways in heterophase/facet junctions and their interactions with heterojunctions. A comprehensive summary of multijunction systems, including multi-Schottky junctions, semiconductor-based heterojunction-attached Schottky junctions, and multisemiconductor-based heterojunctions, is presented. Lastly, we outline future perspectives in this promising research field. This paper will assist researchers in constructing more efficient TiO2-based nanoheterojunction photocatalysts.
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Affiliation(s)
- Yue Zhao
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Yue Shu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Xiaoyu Linghu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Wenqi Liu
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Mengyu Di
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Changyuan Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Dan Shan
- Department of Medical, Tianjin Stomatological Hospital, School of Medicine, Nankai University, Tianjin, 300041, China
| | - Ran Yi
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Baiqi Wang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China; National Demonstration Center for Experimental Preventive Medicine Education (Tianjin Medical University), Tianjin, 300070, China.
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Xu H, Bai G, Afzal S, He K, Xiao Z, Yuan S, Lu Z, Zhu Q, Xu S. Multimodal energy harvesting and catalysis of piezoelectric nanosheets for efficient and round-the-clock wastewater treatment. J Colloid Interface Sci 2023; 651:705-713. [PMID: 37567114 DOI: 10.1016/j.jcis.2023.07.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/21/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023]
Abstract
Solar-driven pollutants degradation is an important way for green wastewater treatment, but it is still limited by the intermittent solar flux. Here, we have prepared piezoelectric Bi4Ti3O12 (BTO) nanosheets with abundant physical properties, which can convert extensive solar energy, mechanical energy and temperature variation energy into electrical and chemical energy. It can be used for round-the-clock wastewater treatment by harvesting multi-modal energy. More importantly, the degradation rate of piezoelectric nanosheets can reach 153.4 × 10-3 min-1, and nanosheets can degrade many organic pollutants. In addition, we fabricate porous foam catalysts based on BTO-polydimethylsiloxane (PDMS) composite to prevent secondary contamination. Our results suggest that BTO nanosheets with photoelectric, piezoelectric and pyroelectric catalysis offer a potential approach for round-the-clock wastewater degradation by harvesting solar energy, ambient mechanical energy, and cyclic thermal energy.
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Affiliation(s)
- Haibo Xu
- Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China; College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Gongxun Bai
- Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
| | - Shahzad Afzal
- College of Quality & Safety Engineering, China Jiliang University, Hangzhou 310018, China
| | - Kun He
- Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China
| | - Zhen Xiao
- Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
| | - Shuoguo Yuan
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
| | - Zhanling Lu
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Qiangqiang Zhu
- Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China
| | - Shiqing Xu
- Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
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Sandua X, Rivero PJ, Conde A, Esparza J, Rodríguez R. A Comparative Study in the Design of TiO 2 Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2589. [PMID: 37048883 PMCID: PMC10095146 DOI: 10.3390/ma16072589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/16/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
This work presents a comparative study related to the photocatalytic efficiency associated with wettability measurements and organic dye degradation, as well as other relevant properties (i.e., corrosion resistance, roughness, wettability, and adhesion to a substrate). The photocatalytic precursors are titanium dioxide nanoparticles (TiO2 NPs) which are dispersed onto a polymeric electrospun fiber matrix by using three different deposition techniques such as electrospraying, spraying, and dip-coating, respectively. In this work, the host electrospun matrix is composed of poly(acrylic acid) fibers crosslinked with cyclodextrin (β-CD), which shows a good chemical affinity and stability with the other deposition techniques which are responsible for incorporating the TiO2 NPs. In order to evaluate the efficacy of each coating, the resultant photocatalytic activity has been monitored by two different tests. Firstly, the reduction in the water contact angle is appreciated, and secondly, the degradation of an organic dye (Rhodamine B) is observed under UV irradiation. In addition, the final roughness, adherence, and pitting corrosion potential have also been controlled in order to determine which solution provides the best combination of properties. Finally, the experimental results clearly indicate that the presence of TiO2 NPs deposited by the three techniques is enough to induce a super hydrophilic behavior after UV irradiation. However, there are notable differences in photocatalytic efficiency on the Rhodamine B as a function of the selected deposition technique.
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Affiliation(s)
- Xabier Sandua
- Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
| | - Pedro J. Rivero
- Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
| | - Ana Conde
- National Center for Metallurgical Research (CENIM-CSIC), Gregorio del Amo Avenue 8, 28040 Madrid, Spain
| | - Joseba Esparza
- Centre of Advanced Surface Engineering, AIN, 31191 Cordovilla, Spain
| | - Rafael Rodríguez
- Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
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5
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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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6
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Zhang W, Hua Y. Synthesis of anatase nanoparticles with enhanced photocatalytic performance by using microfluidic method. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02736-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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7
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Gato WE, Wu J, Appiah I, Smith O, Rochani H. Hepatic proteomic assessment of oral ingestion of titanium dioxide nano fiber (TDNF) in Sprague Dawley rats. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2023; 57:1116-1123. [PMID: 36622359 DOI: 10.1080/10934529.2022.2159733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/08/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Titanium dioxide nanofibers (TDNF) have been widely employed in pigments, sunscreens, paints, ointments, toothpaste and photocatalytic splitting of water. However, their potential toxicity has not been thoroughly examined. The goal of the present study is to examine hepatic effects associated with the ingestion of TDNF. TDNF was fabricated via electrospinning method and characterized. Six to seven weeks old male Sprague Dawley rats ingested (oral gavage) a total of 0 ppm, 40, 60 ppm TDNF for two weeks. After sacrifice, the liver was assessed for cellular effects using proteomic approach. The fibers diameter ranged from 0.18 - 0.29 μm, forming clusters and majority of the fibers were in the rutile phase. Proteomics assessment revealed more that more than 400 hundred proteins in the liver may be affected. These proteins are involved in such processes as catalysis of fatty acids by CoA, homocysteine metabolism, beta oxidation and the condensation of carbamoyl phosphate in the urea cycle among others. Further analysis of the protein associations showed that 325 biological processes, 140 molecular functions and 70 cellular components appear to be affected from the ingestion of TNDF. Quantitative analysis of specific mRNA transcripts indicated CMBL, GSTM1 and SDS were differentially expressed.
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Affiliation(s)
- Worlanyo E Gato
- Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, Georgia, USA
| | - Ji Wu
- Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, Georgia, USA
| | - Isaac Appiah
- Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, Georgia, USA
| | - Olivia Smith
- Department of Chemistry, Otterbein University, Westerville, Ohio, USA
| | - Haresh Rochani
- Department of Environmental Health and Biostatistics, Jiann-Ping Hsu College of Public Health, Georgia Southern University, Statesboro, Georgia, USA
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8
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Wu Z, Wu S, Hong S, Shi X, Guo D, Zhang Y, Xu X, Chen Z, Jia Y. Lead-Free Bi 0.5Na 0.5TiO 3 Ferroelectric Nanomaterials for Pyro-Catalytic Dye Pollutant Removal under Cold-Hot Alternation. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12224091. [PMID: 36432376 PMCID: PMC9695059 DOI: 10.3390/nano12224091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/17/2022] [Accepted: 11/19/2022] [Indexed: 05/03/2023]
Abstract
In this work, explicitly pyro-catalytic performance is observed in sol-gel-synthesized ferroelectric Bi0.5Na0.5TiO3 lead-free nanomaterials, and its application for dye wastewater purification is also actualized under temperature fluctuations varying from 23 °C to 63 °C. The decomposition ratios of the pyro-catalytic Bi0.5Na0.5TiO3 nanomaterials on Rhodamine B, methyl blue and methyl orange can reach 96.75%, 98.35% and 19.97%, respectively. In the pyro-catalytic process, the probed active species such as hydroxyl radicals, superoxide radicals and holes play an extremely important role in decomposing dye molecules. The ferroelectric Bi0.5Na0.5TiO3 lead-free nanomaterials will have an excellent prospect for dye wastewater purification due to its explicit pyro-catalysis.
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Affiliation(s)
- Zheng Wu
- Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710600, China
| | - Siqi Wu
- Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710600, China
| | - Siqi Hong
- Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710600, China
- Correspondence: (S.H.); (Y.J.)
| | - Xiaoyu Shi
- Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710600, China
| | - Di Guo
- School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
| | - Yan Zhang
- School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
| | - Xiaoli Xu
- College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China
| | - Zhi Chen
- College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China
| | - Yanmin Jia
- School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
- Correspondence: (S.H.); (Y.J.)
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9
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Lorenzi R, Golubev NV, Ignat'eva ES, Sigaev VN, Ferrara C, Acciarri M, Vanacore GM, Paleari A. Defect-assisted photocatalytic activity of glass-embedded gallium oxide nanocrystals. J Colloid Interface Sci 2022; 608:2830-2838. [PMID: 34794807 DOI: 10.1016/j.jcis.2021.11.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/22/2021] [Accepted: 11/02/2021] [Indexed: 10/19/2022]
Abstract
The use of glassceramics in photocatalysis is an attractive option for the realization of smart optical fibers and self-cleaning windows. Here we present the photocatalytic activity of germanosilicate glasses embedding Ga2O3 nanocrystals prepared by batch melting and glass heat treatment. The powdered material is used for UV-assisted degradation of rhodamine in water. The kinetics show changes after repeated experiments. In the first cycle, the apparent rate is governed by a second-order reaction with a Gaussian-like shape, whereas the second cycle follows a first-order reaction. The modification appears to be correlated with perturbations in the defect population. Photoluminescence has been used to monitor the evolution of such defects. Kinetic data on photoreactions and defect formation have been modelled in a combined frame in which the defect concentration determines the photocatalytic activity. The results prove the photocatalytic ability of the studied glassceramics. Moreover, the general validity of the kinetic model can be of interest for other systems in which the photocatalytic response depends on photoreactive species concentration.
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Affiliation(s)
- Roberto Lorenzi
- Department of Materials Science, University of Milano-Bicocca, via Cozzi 55, 20125 Milano, Italy.
| | - Nikita V Golubev
- P.D. Sarkisov International Laboratory of Glass-based Functional Materials, Mendeleev University of Chemical Technology of Russia, Miusskaya Square 9, 125047 Moscow, Russia
| | - Elena S Ignat'eva
- P.D. Sarkisov International Laboratory of Glass-based Functional Materials, Mendeleev University of Chemical Technology of Russia, Miusskaya Square 9, 125047 Moscow, Russia
| | - Vladimir N Sigaev
- P.D. Sarkisov International Laboratory of Glass-based Functional Materials, Mendeleev University of Chemical Technology of Russia, Miusskaya Square 9, 125047 Moscow, Russia
| | - Chiara Ferrara
- Department of Materials Science, University of Milano-Bicocca, via Cozzi 55, 20125 Milano, Italy
| | - Maurizio Acciarri
- Department of Materials Science, University of Milano-Bicocca, via Cozzi 55, 20125 Milano, Italy
| | - Giovanni Maria Vanacore
- Department of Materials Science, University of Milano-Bicocca, via Cozzi 55, 20125 Milano, Italy
| | - Alberto Paleari
- Department of Materials Science, University of Milano-Bicocca, via Cozzi 55, 20125 Milano, Italy
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Gul A, Ullah R, Sun J, Munir T, Bai S. Synthesis of mesoporous TiO2/BMMs via hydrothermal method and its potential application toward adsorption and photocatalytic degradation of crystal violet from aqueous solution. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2021.103530] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Das S, Chowdhury A. Recent advancements of g-C 3N 4-based magnetic photocatalysts towards the degradation of organic pollutants: a review. NANOTECHNOLOGY 2021; 33:072004. [PMID: 34731840 DOI: 10.1088/1361-6528/ac3614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Heterogeneous photocatalysis premised on advanced oxidation processes has witnessed a broad application perspective, including water purification and environmental remediation. In particular, the graphitic carbon nitride (g-C3N4), an earth-abundant metal-free conjugated polymer, has acquired extensive application scope and interdisciplinary consideration owing to its outstanding structural and physicochemical properties. However, several issues such as the high recombination rate of the photo-generated electron-hole pairs, smaller specific surface area, and lower electrical conductivity curtail the catalytic efficacy of bulk g-C3N4. Another challenging task is separating the catalyst from the reaction medium, limiting their reusability and practical applications. Therefore, several methodologies are adopted strategically to tackle these issues. Attention is being paid, especially to the magnetic nanocomposites (NCs) based catalysts to enhance efficiency and proficient reusability property. This review summarizes the latest progress related to the design and development of magnetic g-C3N4-based NCs and their utilization in photocatalytic systems. The usefulness of the semiconductor heterojunctions on the catalytic activity, working mechanism, and degradation of pollutants are discussed in detail. The major challenges and prospects of using magnetic g-C3N4-based NCs for photocatalytic applications are highlighted in this report.
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Affiliation(s)
- Suma Das
- Organic Electronics & Sensor Laboratory, Department of Physics, National Institute of Technology Silchar, Assam 788010, India
| | - Avijit Chowdhury
- Organic Electronics & Sensor Laboratory, Department of Physics, National Institute of Technology Silchar, Assam 788010, India
- Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
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12
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Singh SK, Mishra PK, Upadhyay SN. Recent developments in photocatalytic degradation of insecticides and pesticides. REV CHEM ENG 2021. [DOI: 10.1515/revce-2020-0074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Widespread use of pesticides in agricultural and domestic sectors and their long half-life have led to their accumulation in the environment beyond permissible limits. Advanced chemical oxidation methods including photocatalytic degradation are being widely investigated for their mineralization. Photocatalytic degradation is the most promising method for degrading pesticides as well as other organic pollutants. Titanium dioxide with or without modification has been widely used as the photocatalyst. Some research groups have also tried other photocatalysts. This review presents a critical summary of the research results reported during the past two decades as well as the scope for future research in this area.
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Affiliation(s)
- Santosh Kumar Singh
- Centre for Fire Explosives and Environment Safety (CFEES), DRDO , Delhi , 110054 , India
| | - Pradeep Kumar Mishra
- Department of Chemical Engineering & Technology , Indian Institute of Technology (Banaras Hindu University) Varanasi , Varanasi , 221005 , UP , India
| | - Siddh Nath Upadhyay
- Department of Chemical Engineering & Technology , Indian Institute of Technology (Banaras Hindu University) Varanasi , Varanasi , 221005 , UP , India
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Mangold L, Halleux H, Leclerc S, Moncomble A, Cote G, Chagnes A. New insights for titanium(iv) speciation in acidic media based on UV-visible and 31P NMR spectroscopies and molecular modeling. RSC Adv 2021; 11:27059-27073. [PMID: 35480018 PMCID: PMC9037697 DOI: 10.1039/d1ra04284j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 07/30/2021] [Indexed: 11/21/2022] Open
Abstract
Titanium chemistry in aqueous acidic media has been extensively investigated over the last decades. Hydrolyzed species such as Ti(OH)3+, TiO2+, Ti(OH)22+ or Ti(OH)3+ have been identified and their equilibria have been studied in nitric and perchloric acid. A predominance of the divalent cations was found for low pH (i.e., pH <2). Nonetheless, recent literature reports the existence of small titanium oxo-clusters in aqueous acidic media for large titanium(iv) concentration (typically., >0.1 mol L−1), as stable precursors for the formation of condensed titanium dioxide. The present paper reconsiders firstly previous knowledge about the speciation of titanium(iv) in non-complexing acidic media by giving evidence for the presence of polynuclear hydrolyzed species, even at very low Ti(iv) concentration (i.e., typically <0.1 mmol L−1). UV-visible absorbance spectra recorded for diluted nitric acid solutions (a model of non-complexing acidic medium) containing titanium(iv) were compared to time-dependent density functional theory (TD-DFT) predicted excitation energies. Experimental and predicted maximal absorbance wavelengths showed significantly improved matches when polynuclear species were considered in TD-DFT calculation. Then, 0.1–12.7 mol L−1 phosphoric acid solutions containing titanium(iv) were studied by means of spectroscopic techniques (UV-visible, NMR) in order to identify qualitatively the presence of titanium(iv) complexes and to link this speciation to the acid concentration. Two different titanium(iv) orthophosphate complexes, potentially polynuclear, were detected, and the presence of free titanium(iv) is also expected for low phosphoric acid concentration (i.e., <0.1 mol L−1). A general complexation scheme for a large range of H3PO4 concentration was thus formulated. A spectroscopic study of titanium(iv) speciation in diluted nitric acid (model of non-complexing medium) and 0.1–12.7 mol L−1 phosphoric acid aqueous solutions. Evidence for the presence of polynuclear species is supported by molecular modeling.![]()
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Affiliation(s)
- Lucas Mangold
- Université de Lorraine, CNRS, GeoRessources F-54000 Nancy France .,Prayon Rue Joseph Wauters 144 à B-4480 Engis Belgium
| | | | | | - Aurélien Moncomble
- Univ. Lille, CNRS, UMR 8516, LASIRE-Laboratoire Avancé de Spectroscopie pour Les Interactions La Réactivité et L'Environnement F-59000 Lille France
| | - Gérard Cote
- PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie-Paris (IRCP) F-75005 Paris France
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14
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Wang D, He Y, Zhong N, He Z, Shen Y, Zeng T, Lu X, Ma J, Song S. In situ chloride-mediated synthesis of TiO 2 thin film photoanode with enhanced photoelectrochemical activity for carbamazepine oxidation coupled with simultaneous cathodic H 2 production and CO 2 conversion to fuels. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124563. [PMID: 33261974 DOI: 10.1016/j.jhazmat.2020.124563] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 11/01/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
This study investigated the simultaneous photoelectrochemical (PEC) degradation of carbamazepine (CBZ), reduction of CO2 and production of H2 using a TiO2 thin film as photoanode and Ag plate as cathode. The photoanode was fabricated using sequential hydrothermal and calcination processes. The use of chloride during the hydrothermal process enhanced formation of oxygen vacancies and defects on the TiO2 surface. Calcination not only further strengthened those features but also enhanced the crystallinity and anatase/rutile ratio, endowing the TiO2 photoanode with superior PEC capacity. Characterization of physicochemical and PEC properties revealed that photogenerated electrons-holes were rapidly generated and efficiently separated on the TiO2 surface during the PEC process. Hydroxyl radicals were the main active species responsible for anodic oxidation of carbamazepine, while hydrogen radicals and carbon dioxide radical anions mediated CO2 reduction and H2 production in the cathodic process. This work confirms the suitability of the prepared TiO2 photoanode for PEC degradation of organic pollutants coupled with CO2 reduction and H2 production.
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Affiliation(s)
- Da Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yinning He
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Na Zhong
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhiqiao He
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yi Shen
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Tao Zeng
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Xiaohui Lu
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shuang Song
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China.
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15
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Tiple A, Sinhmar PS, Gogate PR. Improved direct synthesis of TiO 2 catalyst using sonication and its application for the desulfurization of thiophene. ULTRASONICS SONOCHEMISTRY 2021; 73:105547. [PMID: 33845244 PMCID: PMC8059087 DOI: 10.1016/j.ultsonch.2021.105547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
TiO2 catalyst was synthesized in the presence of ultrasound (ultrasonic horn at 20 kHz frequency and 70% duty cycle) at different power (80 W to 120 W) and durations as well as surfactant concentration with an objective of establishing best conditions for achieving lowest particle size of the photocatalyst. Detailed characterization in terms of crystal phase, crystallinity, functional groups and morphology of the photocatalyst has been performed using SEM, XRD and FTIR analysis. It was demonstrated that sonication significantly reduced the particle size with high degree of sphericity and homogeneity as compared to conventionally synthesized TiO2 with similar crystallinity in both cases. The catalytic performance was subsequently evaluated for the deep desulfurization of thiophene. Different desulfurization approaches including individual US (ultrasonic horn at 20 kHz frequency, 110 W power and 70% duty cycle) and UV irradiations, US/UV, US/UV/H2O2, US/UV/TiO2 and US/UV/H2O2/TiO2 were applied to evaluate the catalytic activity. The best approach was demonstrated as US/UV/H2O2/TiO2 and also activity of catalyst synthesized using ultrasound was much better compared to conventionally synthesized catalyst. The studies related to different model solvents demonstrated lowest reactivity for toluene whereas n-hexane and n-octane resulted in complete desulfurization in 60 min and 50 min treatment respectively. The desulfurization followed pseudo first order reaction kinetics irrespective of the solvent used. Overall the work clearly demonstrated the efficacy of ultrasound in improving the catalyst synthesis as well as desulfurization of thiophene.
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Affiliation(s)
- Ashlesha Tiple
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Pankaj S Sinhmar
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Parag R Gogate
- Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
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16
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Tsvetkov MP, Milanova MM, Cherkezova-Zheleva ZP, Tsoncheva TS, Zaharieva JT, Abrashev MV, Mitov IG. Catalytic and photocatalytic properties of zinc-nickel ferrites. J CHEM SCI 2021. [DOI: 10.1007/s12039-020-01882-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Ogawa K, Wakisaka Y, Suzuki H, Tomita O, Abe R. Visible-Light-Responsive Oxyhalide PbBiO 2Cl Photoelectrode: On-Site Flux Synthesis on a Fluorine-Doped Tin Oxide Electrode. ACS APPLIED MATERIALS & INTERFACES 2021; 13:5176-5183. [PMID: 33231427 DOI: 10.1021/acsami.0c14964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The performance of photoelectrodes is hugely affected by the preparation method. Although a flux synthesis is useful to endow semiconductor particles with the desired properties such as high crystallinity, there are only a few reports on its application to photoelectrode fabrication, probably because relatively high temperatures are necessary. In the present study, we introduce a new concept for on-site flux synthesis of semiconductor crystals on a commonly used fluorine-doped tin oxide (FTO) substrate; a seed layer is predeposited and then treated with an appropriate flux containing other required elements at a right temperature lower than the limit temperature of FTO but sufficiently high to transform the seed layer to the target material with the aid of flux. Here, an oxyhalide PbBiO2Cl, one of the promising semiconductors for achieving visible-light water splitting, is selected as a target material. Combination of a BiOCl seed layer and the NaCl-PbCl2 flux containing other precursors enables the seed layer to transform into PbBiO2Cl crystals even at 450 °C. The thickness of the PbBiO2Cl layer can be controlled by changing the thickness of the BiOCl seed layer for efficient photon-to-current conversion. Owing to a good contact at the semiconductor-substrate interfaces as well as the high quality of PbBiO2Cl crystals, the flux-synthesized PbBiO2Cl photoelectrode shows a significantly improved PEC performance compared with those prepared from the particulate PbBiO2Cl samples via the conventional squeegee method. In addition, the present PbBiO2Cl photoelectrodes exhibit both anodic and cathodic photoresponses with substantially high current values depending on the applied potentials; the unusual phenomenon is affected by the conditions in flux-assisted synthesis. The present study provides a new and effective way for fabricating efficient photoelectrodes of various semiconductors on various substrates and a possible option to control their morphologies and p/n types for further improvement in performance.
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Affiliation(s)
- Kanta Ogawa
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan
| | - Yusuke Wakisaka
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hajime Suzuki
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Osamu Tomita
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Ryu Abe
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Sakyo-ku, Kyoto 606-8501, Japan
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18
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Kim MG, Lee JE, Kim KS, Kang JM, Lee JH, Kim KH, Cho M, Lee SG. Photocatalytic degradation of methylene blue under UV and visible light by brookite–rutile bi-crystalline phase of TiO 2. NEW J CHEM 2021. [DOI: 10.1039/d0nj05162d] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brookite–rutile bi-crystalline phase of TiO2 were synthesized and applied for the degradation of methylene blue under UV and visible light irradiation by photocatalytic reaction.
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Affiliation(s)
- Min Gu Kim
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Ji Eun Lee
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Kang Seok Kim
- Department of Organic Material Science and Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Jeong Min Kang
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
| | - Jeong Hoon Lee
- Korea Institute of Convergence Textile
- Jeollabuk-do
- Republic of Korea
| | - Kwang Ho Kim
- School of Materials Science and Engineering
- Pusan National University
- Busan
- Republic of Korea
| | - Min Cho
- Division of Biotechnology
- Advanced institute of Environment and Bioscience
- College of Environmental and Bioresource Sciences
- Chonbuk National University
- Iksan 54596
| | - Seung Geol Lee
- School of Chemical Engineering
- Pusan National University
- Busan 46241
- Republic of Korea
- Department of Organic Material Science and Engineering
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19
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Ma Y, Wang Y, Jiang T, Zhang F, Li X, Zhu Y. Hydrothermal synthesis of novel 1-aminoperylene diimide/TiO 2/MoS 2 composite with enhanced photocatalytic activity. Sci Rep 2020; 10:22005. [PMID: 33319850 PMCID: PMC7738548 DOI: 10.1038/s41598-020-78894-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 11/30/2020] [Indexed: 11/09/2022] Open
Abstract
1-aminoperylene diimide/TiO2/MoS2 composite (NH2-PDI/TiO2/MoS2) with ordered structure was prepared by hydrothermal synthesis method. The composite was characterized by XRD, SEM, FTIR, XPS, BET, DRS, PL, EIS, Raman, photocurrent, and Mott-Schottky plots spectroscopy. The potential positions of the conduction and valence bands, and the band gap energy of the semiconductors were estimated. The composite exhibited higher photocatalytic activity compared with the mono-component systems. The apparent rate constants (k) were determined as 0.00616, 0.00352, 0.00738, 0.00517, 0.00752, and 0.00806 min-1 for TiO2, NH2-PDI, NH2-PDI/TiO2, MoS2, MoS2/TiO2, and NH2-PDI/TiO2/MoS2, respectively. The detection of radical scavengers confirmed that superoxide radicals, photogenerated holes, and photogenerated electrons were the main active substances for MB degradation. Between type II- heterojunction mechanism and Z-scheme mechanism, the latter could explain the enhanced photocatalytic activity of the composite better. The Z-scheme mechanism accumulates more electrons at CB level of NH2-PDI and hence generates more super oxide radicals.
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Affiliation(s)
- Yongshan Ma
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Shandong, 250101, People's Republic of China.
| | - Yue Wang
- Shandong Provincial Key Laboratory of Metrology and Measurement, Shandong Social Justice Institute of Metrology, Shandong Institute of Metrology, Jinan, 250014, People's Republic of China
| | - Tianyi Jiang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Shandong, 250101, People's Republic of China
| | - Fengxia Zhang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Shandong, 250101, People's Republic of China.
| | - Xuemei Li
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Shandong, 250101, People's Republic of China
| | - Yanyan Zhu
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Shandong, 250101, People's Republic of China
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20
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Affiliation(s)
- Bouhank Antar
- Research Center in Industrial Technologies CRTI, Cheraga, Algiers, Algeria
- Laboratory of Chemical Process Engineering (LCPE), Faculty of Technology, Ferhat ABBAS Setif-1 University, Setif, Algeria
| | - Bellal Youcef
- Research Center in Industrial Technologies CRTI, Cheraga, Algiers, Algeria
- Faculty of Technology, Department of Engineering Process, Laboratory of Electrochemistry, Molecular Engineering and Redox Catalysis (LEIMCR), Ferhat ABBAS Setif-1 University, Setif, Algeria
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21
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Djokić VR, Marinković AD, Petrović RD, Ersen O, Zafeiratos S, Mitrić M, Ophus C, Radmilović VR, Janaćković DT. Highly Active Rutile TiO 2 Nanocrystalline Photocatalysts. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33058-33068. [PMID: 32602695 DOI: 10.1021/acsami.0c03150] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The controllable synthesis of rutile TiO2 single crystal particles with the preferential orientation of {111} facets still remains a scientific and technological challenge. Here, we developed a facile route for fabrication of rutile TiO2 nanorod crystals (RTiO2NRs) having high ratios of oxidative {111} to reductive {110} surfaces. RTiO2NRs were synthesized using a peroxo-titanium complex (PTC) approach, which was controlled by changing the Ti/H2O2 ratio. The thus obtained RTiO2NRs revealed a high tendency to agglomerate through orientation-dependent attachment along the {110} facets. This resulted in an increased {111}/{110} surface ratio and led to a markedly improved photocatalytic activity of RTiO2NR aggregates. The reported findings illustrate the rich potential of the herein proposed facile and energy-efficient synthesis of nanostructured rutile TiO2-based photocatalysts.
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Affiliation(s)
- Veljko R Djokić
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
| | - Aleksandar D Marinković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
| | - Rada D Petrović
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR CNRS-Université de Strasbourg 7504, 23, rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
| | - Spyridon Zafeiratos
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Sante (ICPEES), ECPM, UMR 7515 du CNRS, Strasbourg University, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France
| | - Miodrag Mitrić
- Condensed Matter Physics Laboratory, Vinča Institute, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
| | - Colin Ophus
- NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Velimir R Radmilović
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
- Serbian Academy of Sciences and Arts, Knez Mihailova 35, 11000 Belgrade, Serbia
| | - Djordje T Janaćković
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia
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22
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Xu J, Zhang B, Jia L, Bi N, Zhao T. Metal-enhanced fluorescence detection and degradation of tetracycline by silver nanoparticle-encapsulated halloysite nano-lumen. JOURNAL OF HAZARDOUS MATERIALS 2020; 386:121630. [PMID: 31744725 DOI: 10.1016/j.jhazmat.2019.121630] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 10/28/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
The ultrasensitive detection and efficient degradation of tetracycline (TC) residues are important for improving food safety and protecting human health. In this paper, a smart silver-enhanced fluorescence platform for the ultrasensitive detection of TC was constructed via a simple and selective modification of the interior and external tubes of natural halloysite nanotubes. The thick pipe wall of this platform provides a natural defense and promotes metal-enhanced fluorescence effects, which subsequently accelerates the detection of TC. Moreover, the nanoplatform of the modified Ag nanoparticles can induce the separation of electrons and holes, thereby enhancing photocatalytic activity in TC degradation. This platform provides new opportunities for studying natural halloysite nanotubes and for simultaneously detecting and photodegrading other deleterious substances.
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Affiliation(s)
- Jun Xu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China
| | - Beibei Zhang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China
| | - Lei Jia
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China.
| | - Ning Bi
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China
| | - Tongqian Zhao
- Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo, Henan, 454000, China.
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23
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Photocatalytic activity of NiFe2O4 and Zn0.5Ni0.5Fe2O4 modified by Eu(III) and Tb(III) for decomposition of Malachite Green. OPEN CHEM 2019. [DOI: 10.1515/chem-2019-0116] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThe mixed metal oxides NiFe2O4 and Zn0.5Ni0.5Fe2O4 with a spinel-like structure, pure and modified with the lanthanide ions Eu(III) and Tb(III), were prepared by a sol-gel process in which propylene oxide was used as a gelling agent and then tested as photocatalysts. The photocatalytic activity was studied under polychromic visible light irradiation (halogen lamp) for the decomposition of the water pollutant Malachite Green in model solutions which were prepared under laboratory conditions. The modified samples showed a better activity under visible light irradiation than the pure samples. The highest activity under visible light irradiation was observed for Zn0.5Ni0.5Fe2O4 that was modified with 5 wt. % Eu(III) or Tb(III), and which showed the positive effects of the doping ions. Based on the cartographic data for the smooth and equal distribution of Tb(III) on the surface of Zn0.5Ni0.5Fe2O4 particles, the surface processes may have influenced the photocatalytic activity. The energy band gap of the samples was calculated, showing somewhat lower values for the doped samples than the pure ferrites.
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24
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He J, Du YE, Bai Y, An J, Cai X, Chen Y, Wang P, Yang X, Feng Q. Facile Formation of Anatase/Rutile TiO 2 Nanocomposites with Enhanced Photocatalytic Activity. Molecules 2019; 24:molecules24162996. [PMID: 31430852 PMCID: PMC6719911 DOI: 10.3390/molecules24162996] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/13/2019] [Accepted: 08/16/2019] [Indexed: 11/16/2022] Open
Abstract
Anatase/rutile mixed-phase TiO2 nanoparticles were synthesized through a simple sol-gel route with further calcination using inexpensive titanium tetrachloride as a titanium source, which effectively reduces the production cost. The structural and optical properties of the prepared materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-vis adsorption. The specific surface area was also analyzed by Brunauer-Emmett-Teller (BET) method. The anatase/rutile mixed-phase TiO2 nanocomposites containing of rod-like, cuboid, and some irregularly shaped anatase nanoparticles (exposed {101} facets) with sizes ranging from tens to more than 100 nanometers, and rod-like rutile nanoparticles (exposed {110} facets) with sizes ranging from tens to more than 100 nanometers. The photocatalytic activities of the obtained anatase/rutile mixed-phase TiO2 nanoparticles were investigated and compared by evaluating the degradation of hazardous dye methylene blue (MB) under ultraviolet light illumination. Compared to the commercial Degussa P25-TiO2, the mixed-phase TiO2 nanocomposites show better photocatalytic activity, which can be attributed to the optimal anatase to rutile ratio and the specific exposed crystal surface on the surface. The anatase/rutile TiO2 nanocomposites obtained at pH 1.0 (pH1.0-TiO2) show the best photocatalytic activity, which can be attributed to the optimal heterojunction structure, the smaller average particle size, and the presence of a specific exposed crystal surface. The enhanced photocatalytic activity makes the prepared anatase/rutile TiO2 photocatalysts a potential candidate in the removal of the organic dyes from colored wastewater.
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Affiliation(s)
- Jing He
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Yi-En Du
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China.
| | - Yang Bai
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Jing An
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Xuemei Cai
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China
| | - Yongqiang Chen
- School of Chemistry & Chemical Engineering, Jinzhong University, Jinzhong 030619, China.
| | - Pengfei Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Xiaojing Yang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Qi Feng
- Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu-shi 761-0396, Japan
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Review on heterophase/homophase junctions for efficient photocatalysis: The case of phase transition construction. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(19)63290-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Visan A, van Ommen JR, Kreutzer MT, Lammertink RGH. Photocatalytic Reactor Design: Guidelines for Kinetic Investigation. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00381] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aura Visan
- Soft Matter, Fluidics and Interfaces, MESA+Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - J. Ruud van Ommen
- Chemical Engineering Department, TU Delft Process Technology Institute, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Michiel T. Kreutzer
- Chemical Engineering Department, TU Delft Process Technology Institute, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Rob G. H. Lammertink
- Soft Matter, Fluidics and Interfaces, MESA+Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
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27
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Synthesis, characterization and photocatalytic activity evaluation of TiO2 – ZnO nanocomposites: Elucidating effect of varying Ti:Zn molar ratio. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.12.053] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Hajjaji A, Elabidi M, Trabelsi K, Assadi A, Bessais B, Rtimi S. Bacterial adhesion and inactivation on Ag decorated TiO2-nanotubes under visible light: Effect of the nanotubes geometry on the photocatalytic activity. Colloids Surf B Biointerfaces 2018; 170:92-98. [DOI: 10.1016/j.colsurfb.2018.06.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 06/02/2018] [Accepted: 06/04/2018] [Indexed: 10/14/2022]
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29
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Nasr M, Eid C, Habchi R, Miele P, Bechelany M. Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications. CHEMSUSCHEM 2018; 11:3023-3047. [PMID: 29984904 DOI: 10.1002/cssc.201800874] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/06/2018] [Indexed: 06/08/2023]
Abstract
Environmental and energy problems have drawn much attention owing to rapid population growth and accelerated economic development. For instance, photocatalysis, "a green technology", plays an important role in solar-energy conversion owing to its potential to solve energy and environmental problems. Recently, many efforts have been devoted to improving visible-light photocatalytic activity by using titanium dioxide as a photocatalyst as a result of its wide range of applications in the energy and environment fields. However, fast charge recombination and an absorption edge in the UV range limit the photocatalytic efficiency of TiO2 under visible-light irradiation. Many investigations have been undertaken to overcome the limitations of TiO2 and, therefore, to enhance its photocatalytic activity under visible light. The present literature review focuses on different strategies used to promote the separation efficiency of electron-hole pairs and to shift the absorption edge of TiO2 to the visible region. Current synthesis techniques used to elaborate several nanostructures of TiO2 -based materials, recent progress in enhancing visible photocatalytic activity, and different photocatalysis applications will be discussed. On the basis of the studies reported in the literature, we believe that this review will help in the development of new strategies to improve the visible-light photocatalytic performance of TiO2 -based materials further.
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Affiliation(s)
- Maryline Nasr
- Institut Européen des Membranes IEM, UMR-5635, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, F-, 34095, Montpellier Cedex 5, France
- EC2M, Faculty of Sciences 2, campus Pierre Gemayel, Fanar, Lebanese University, 90656, Lebanon
| | - Cynthia Eid
- EC2M, Faculty of Sciences 2, campus Pierre Gemayel, Fanar, Lebanese University, 90656, Lebanon
| | - Roland Habchi
- EC2M, Faculty of Sciences 2, campus Pierre Gemayel, Fanar, Lebanese University, 90656, Lebanon
| | - Philippe Miele
- Institut Européen des Membranes IEM, UMR-5635, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, F-, 34095, Montpellier Cedex 5, France
- Institut Universitaire de France (IUF), MESRI, 1 rue Descartes, 75231, Paris cedex 05, France
| | - Mikhael Bechelany
- Institut Européen des Membranes IEM, UMR-5635, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, F-, 34095, Montpellier Cedex 5, France
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30
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Haisch C, Günnemann C, Melchers S, Fleisch M, Schneider J, Emeline AV, Bahnemann DW. Irreversible surface changes upon n-type doping – A photoelectrochemical study on rutile single crystals. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Huang X, Ruan L, Jiang R, Guo L, Liu S. The Direction of Photogenerated Charge Carrier Transfer in TiO 2–Fe 2O 3 and TiO 2–CuO. CHEM LETT 2018. [DOI: 10.1246/cl.180020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaomin Huang
- South China University of Technology, Guangzhou 510640, P. R. China
| | - Lingfeng Ruan
- South China University of Technology, Guangzhou 510640, P. R. China
| | - Rongying Jiang
- South China University of Technology, Guangzhou 510640, P. R. China
| | - Lin Guo
- Department of Chemistry, Guangdong University of Education, Guangzhou 510303, P. R. China
| | - Song Liu
- South China University of Technology, Guangzhou 510640, P. R. China
- The Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou 510640, P. R. China
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32
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Tiwari A, Mondal I, Ghosh S, Chattopadhyay N, Pal U. Fabrication of mixed phase TiO2 heterojunction nanorods and their enhanced photoactivities. Phys Chem Chem Phys 2017; 18:15260-8. [PMID: 27212470 DOI: 10.1039/c6cp00486e] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substantial efforts have been made in recent times in solving the major limiting factors affecting the efficiency of a photocatalyst. The fabrication of efficient junction architectures is one of the viable approaches to resolve this setback. We have developed a facile and systematic approach for the synthesis of anatase TiO2 () nanoparticles and 1-D anatase and rutile TiO2 () heterojunction nanorods to enhance the interfacial contact area by adjusting the titanium(iv) butoxide (TBOT) to titanium chloride (TiCl4) volume ratio. Their narrower band gap, increasing surface area and anatase phase composition engineered by adjusting the relative concentrations of titanium butoxide (TBOT) and titanium chloride (TiCl4) (TBOT/TiCl4, 1 : 0, 1 : 0.25, 1 : 1 and 1 : 4 v/v for , , and respectively) are also addressed. The materials showed impressive photocatalytic activity for H2 evolution from water/methanol and the photodegradation of organic pollutants like rhodamine B (RhB) and methylene blue (MB) dyes. showed superior activity (16.4 mmol g(-1) h(-1)) with an apparent quantum efficiency (AQE) of 7.7% together with its long-term stability. This is attributed to the synergistic effect observed in the mixed phase nanorod heterojunction photocatalyst. Methyl viologen (MV(2+)) has been used as a probe to elucidate the photocatalytic activities and highlight the heterojunction driven separation of photo-excited charge carriers for enhanced hydrogen production.
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Affiliation(s)
- Amritanjali Tiwari
- Central Mechanical Engineering Research Institute, M. G. Avenue, Durgapur-713209, WB, India. and Network of Institutes for Solar Energy (CSIR-NISE) and Academy of Scientific and Innovative Research (AcSIR), India
| | - Indranil Mondal
- Central Mechanical Engineering Research Institute, M. G. Avenue, Durgapur-713209, WB, India. and Network of Institutes for Solar Energy (CSIR-NISE) and Academy of Scientific and Innovative Research (AcSIR), India
| | - Saptarshi Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | | | - Ujjwal Pal
- Central Mechanical Engineering Research Institute, M. G. Avenue, Durgapur-713209, WB, India. and Network of Institutes for Solar Energy (CSIR-NISE) and Academy of Scientific and Innovative Research (AcSIR), India and Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
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33
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Characterization and photocatalytic activity of Bi 3 TaO 7 prepared by hydrothermal method. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2017.08.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Kotsyubynsky VO, Myronyuk IF, Chelyadyn VL, Hrubiak AB, Moklyak VV, Fedorchenko SV. The Effect of Sulphate Anions on the Ultrafine Titania Nucleation. NANOSCALE RESEARCH LETTERS 2017; 12:369. [PMID: 28545263 PMCID: PMC5442038 DOI: 10.1186/s11671-017-2144-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 05/15/2017] [Indexed: 06/07/2023]
Abstract
The phenomenological model of sulphate anions effect on the nanodispersed titania synthesis during hydrolysis of titanium tetrachloride was studied. It was proposed that both chelating and bridging bidentate complexes formation between sulphate anions and octahedrally coordinated [Ti(OH)h(OH2)6-h](4-h)+ mononers is the determinative factor for anatase phase nucleation.
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Affiliation(s)
| | - Ivan F. Myronyuk
- Vasyl Stefanyk Precarpathian National University, 57 Shevchenko str, Ivano-Frankivsk, 76018 Ukraine
| | - Volodymyr L. Chelyadyn
- Institute of Materials Science I.M. Frantsevich, 3 Academic Krzhizhanovskii Str, Kyiv, 03680 Ukraine
| | - Andriy B. Hrubiak
- Institute of Metal Physics, National Academy of Science, 36 Acad. Vernadsky Boulevard, Kyiv, 03680 Ukraine
| | - Volodymyr V. Moklyak
- Institute of Metal Physics, National Academy of Science, 36 Acad. Vernadsky Boulevard, Kyiv, 03680 Ukraine
| | - Sofia V. Fedorchenko
- Vasyl Stefanyk Precarpathian National University, 57 Shevchenko str, Ivano-Frankivsk, 76018 Ukraine
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35
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Lai LL, Wen W, Wu JM. Room-Temperature Hydrolysis of Potassium Titanyl Oxalate and Water-Assisted Crystallization for TiO 2
with High Photocatalytic Activity. ChemistrySelect 2017. [DOI: 10.1002/slct.201700372] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lu-Lu Lai
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering; Zhejiang University; Hangzhou 310037 P. R. China
| | - Wei Wen
- College of Mechanical and Electrical Engineering; Hainan University; Haikou 570228 P.R. China
| | - Jin-Ming Wu
- State Key Laboratory of Silicon Materials and School of Materials Science and Engineering; Zhejiang University; Hangzhou 310037 P. R. China
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Carbajo J, Bahamonde A, Faraldos M. Photocatalyst performance in wastewater treatment applications: Towards the role of TiO 2 properties. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.03.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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37
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Qiao L, Swihart MT. Solution-phase synthesis of transition metal oxide nanocrystals: Morphologies, formulae, and mechanisms. Adv Colloid Interface Sci 2017; 244:199-266. [PMID: 27246718 DOI: 10.1016/j.cis.2016.01.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 01/13/2016] [Accepted: 01/20/2016] [Indexed: 12/26/2022]
Abstract
In this review, we provide a broad overview of solution-phase synthesis of transition metal oxide nanocrystals (NCs), including a substantial catalog of published methods, and a unifying classification and discussion. Prevalent subcategories of solution-phase synthesis are delineated and general features are summarized. The diverse morphologies achievable by solution-phase synthesis are defined and exemplified. This is followed by sequential consideration of the solution-phase synthesis of first-row transition metal oxides. The common oxides of Ti, V, Mn, Fe, Co, Ni, Cu, and Zn are introduced; major crystal lattices are presented and illustrated; representative examples are explained; and numerous synthesis formulae are tabulated. Following this presentation of experimental studies, we present an introduction to theories of NC nucleation and growth. Various models of NC nucleation and growth are addressed, and important concepts determining the growth and structure of colloidal NCs are explained. Overall, this review provides an entry into systematic understanding of solution-phase synthesis of nanocrystals, with a reasonably comprehensive survey of results for the important category of transition metal oxide NCs.
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Affiliation(s)
- Liang Qiao
- Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, NY 14260-4200, USA
| | - Mark T Swihart
- Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, NY 14260-4200, USA.
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38
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Bagheri S, Julkapli NM. Mixed-phase TiO2 photocatalysis: correlation between phase composition and photodecomposition of water pollutants. REV INORG CHEM 2017. [DOI: 10.1515/revic-2016-0001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn most cases, the combination of both anatase (up to 80%) and rutile (up to 20%) structures in a mixed-phase TiO2 semiconductor results in a better photocatalytic performance compared to the pure phase. The improvement from anatase to rutile is brought about by the enhanced transportation of photogenerated electrons. This consequently results in improved efficiency of the photoelectric and photocurrent conversion. This review highlights the effects of the morphology, particle size, and crystal structure of mixed-phase TiO2 toward the photodegradation of water pollutants. It was demonstrated that the synergistic effect between anatase and rutile TiO2 due to the interfacial electron transfer from rutile to anatase improved the photocurrent as well as the overall conversion efficiency of the anatase photoanodes. The morphologies of mixed-phase TiO2 also contributed to the final photodegradation properties. The charge and electron transfer of mixed-phase TiO2 improved the 1D structure. This consequently enables photodegradation at the visible light range.
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Affiliation(s)
- Samira Bagheri
- 1Nanotechnology and Catalysis Research Center (NANOCAT), Level 3, Block A, Institute of Postgraduate Studies (IPS) Building, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Nurhidayatullaili Muhd Julkapli
- 1Nanotechnology and Catalysis Research Center (NANOCAT), Level 3, Block A, Institute of Postgraduate Studies (IPS) Building, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
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39
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Ye T, Ma S, Jiang X, Petrović M, Vijila C, Ramakrishna S, Wei L. Electrosprayed TiO 2 nanoporous hemispheres for enhanced electron transport and device performance of formamidinium based perovskite solar cells. NANOSCALE 2017; 9:412-420. [PMID: 27924339 DOI: 10.1039/c6nr07369g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Titanium dioxide (TiO2) nanoporous hemispheres (NHSs) with a radius of ∼200 nm are fabricated by electrospraying a hydrothermally synthesized TiO2 nanoparticle (NP) suspension solution. The resulting TiO2 NHSs are highly porous, which are beneficial to the infiltration of perovskites and provide a larger contact area, as building blocks to construct a mesoporous TiO2 layer for FA0.81MA0.15Pb(I0.836Br0.15)3 based perovskite solar cells (PSCs). By varying the TiO2 NHS collecting period (15 s, 30 s, 60 s and 90 s) during the electrospraying process, the performance of PSCs changes with different TiO2 NHS distribution densities. The optimized PSC employing TiO2 NHSs (60 s) exhibits a photovoltaic conversion efficiency (PCE) as high as 19.3% with a Jsc of 23.8 mA cm-2, a Voc of 1.14 V and a FF of 0.71. Furthermore, the PSC possesses a reproducible PCE value with little hysteresis in its current density-voltage (J-V) curves. The small perturbation transient photovoltage (TPV) measurement reveals a longer free carrier lifetime within the TiO2 NHS based PSC than that in the TiO2 NP based PSC, and the time of flight (TOF) photoconductivity measurement shows that charge mobilities in this system are also enhanced. These characteristics make TiO2 NHSs a promising electron transport material for efficient photovoltaic devices.
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Affiliation(s)
- Tao Ye
- Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore.
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40
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Zakharova MV, Kleitz F, Fontaine FG. Lewis acidity quantification and catalytic activity of Ti, Zr and Al-supported mesoporous silica. Dalton Trans 2017; 46:3864-3876. [DOI: 10.1039/c7dt00035a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water-tolerant metal supported Lewis acids were synthesized for the catalytic amidation of electron-poor and bulky amines.
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Affiliation(s)
- Maria V. Zakharova
- Département de Chimie
- Centre de Catalyse et Chimie Verte (C3 V)
- Université Laval
- Québec
- Canada
| | - Freddy Kleitz
- Département de Chimie
- Centre de Recherche sur les Matériaux Avancés (CERMA)
- Université Laval
- Québec
- Canada
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41
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Zhao S, Cheng Z, Kang L, Li M, Gao Z. The facile preparation of Ag decorated TiO2/ZnO nanotubes and their potent photocatalytic degradation efficiency. RSC Adv 2017. [DOI: 10.1039/c7ra09466c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An illustration of the formation mechanism of Ag/TiO2/ZnO nanotubes.
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Affiliation(s)
- Shengzhe Zhao
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- China
| | - Zhiqiang Cheng
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- China
- School of Aerospace Engineering
| | - Lijuan Kang
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- China
| | - Mingtang Li
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- China
| | - Zhiling Gao
- College of Chemistry
- Jilin University
- Changchun 130118
- China
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42
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Lee H, Kim M, Sohn D, Kim SH, Oh SG, Im SS, Kim IS. Electrospun tungsten trioxide nanofibers decorated with palladium oxide nanoparticles exhibiting enhanced photocatalytic activity. RSC Adv 2017. [DOI: 10.1039/c6ra24935c] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tungsten trioxide (WO3) based nanofibers have many advantages as photocatalysts due to its band gap which fits with readily accessible light sources.
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Affiliation(s)
- Hoik Lee
- Nano Fusion Technology Research Lab
- Division
- of Frontier Fibers
- Institute for Fiber Engineering (IFES)
- Interdisciplinary Cluster for Cutting Edge Research, (ICCER)
| | - Myungwoong Kim
- Department of Chemistry
- Inha University
- Incheon 22212
- Korea
| | - Daewon Sohn
- Department of Chemistry and Research Institute for Natural Sciences
- Hanyang University
- Seoul 133-791
- Korea
| | - Seong Hun Kim
- Department of Chemical Engineering
- Hanyang University
- Seoul 133-791
- Korea
| | - Seong-Geun Oh
- Department of Organic and Nano Engineering
- College of Engineering
- Hanyang University
- Seoul
- Korea
| | - Seung Soon Im
- Department of Organic and Nano Engineering
- College of Engineering
- Hanyang University
- Seoul
- Korea
| | - Ick Soo Kim
- Nano Fusion Technology Research Lab
- Division
- of Frontier Fibers
- Institute for Fiber Engineering (IFES)
- Interdisciplinary Cluster for Cutting Edge Research, (ICCER)
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43
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Hashemizadeh I, Tsang DCW, Ng YH, Wu Z, Golovko V, Yip ACK. Bio-mimicking TiO2 architectures for enhanced photocatalytic activity under UV and visible light. RSC Adv 2017. [DOI: 10.1039/c7ra04185c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A multi-step chemical replication method using natural green leaves as templates can produce a porous, visible-light active TiO2-based photocatalyst.
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Affiliation(s)
- Iman Hashemizadeh
- Department of Chemical and Process Engineering
- University of Canterbury
- Christchurch
- New Zealand
| | - Daniel C. W. Tsang
- Department of Civil and Environmental Engineering
- Hong Kong Polytechnic University
- Hong Kong
- China
| | - Yun Hau Ng
- School of Chemical Engineering
- University of New South Wales
- Australia
- The Joint Laboratory for Energy and Environmental Catalysis
- City University of Hong Kong
| | - Zhijie Wu
- State Key Laboratory of Heavy Oil Processing
- The Key Laboratory of Catalysis of CNPC
- China University of Petroleum
- Beijing
- China
| | - Vladimir Golovko
- Department of Chemistry
- University of Canterbury
- Christchurch
- New Zealand
| | - Alex C. K. Yip
- Department of Chemical and Process Engineering
- University of Canterbury
- Christchurch
- New Zealand
- The Joint Laboratory for Energy and Environmental Catalysis
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44
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Li D, Li X, Gong J. Catalytic Reforming of Oxygenates: State of the Art and Future Prospects. Chem Rev 2016; 116:11529-11653. [PMID: 27527927 DOI: 10.1021/acs.chemrev.6b00099] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This Review describes recent advances in the design, synthesis, reactivity, selectivity, structural, and electronic properties of the catalysts for reforming of a variety of oxygenates (e.g., from simple monoalcohols to higher polyols, then to sugars, phenols, and finally complicated mixtures like bio-oil). A comprehensive exploration of the structure-activity relationship in catalytic reforming of oxygenates is carried out, assisted by state-of-the-art characterization techniques and computational tools. Critical emphasis has been given on the mechanisms of these heterogeneous-catalyzed reactions and especially on the nature of the active catalytic sites and reaction pathways. Similarities and differences (reaction mechanisms, design and synthesis of catalysts, as well as catalytic systems) in the reforming process of these oxygenates will also be discussed. A critical overview is then provided regarding the challenges and opportunities for research in this area with a focus on the roles that systems of heterogeneous catalysis, reaction engineering, and materials science can play in the near future. This Review aims to present insights into the intrinsic mechanism involved in catalytic reforming and provides guidance to the development of novel catalysts and processes for the efficient utilization of oxygenates for energy and environmental purposes.
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Affiliation(s)
- Di Li
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, China
| | - Xinyu Li
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, China
| | - Jinlong Gong
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072, China
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45
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Wang Y, Zhao J, Wang T, Li Y, Li X, Yin J, Wang C. CO2 photoreduction with H2O vapor on highly dispersed CeO2/TiO2 catalysts: Surface species and their reactivity. J Catal 2016. [DOI: 10.1016/j.jcat.2015.12.030] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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Ismail AA, Abdelfattah I, Helal A, Al-Sayari SA, Robben L, Bahnemann DW. Ease synthesis of mesoporous WO3-TiO2 nanocomposites with enhanced photocatalytic performance for photodegradation of herbicide imazapyr under visible light and UV illumination. JOURNAL OF HAZARDOUS MATERIALS 2016; 307:43-54. [PMID: 26775101 DOI: 10.1016/j.jhazmat.2015.12.041] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 12/20/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
Herein, we report the ease synthesis of mesoporous WO3-TiO2 nanocomposites at different WO3 contents (0-5wt%) together with their photocatalytic performance for the degradation of the imazapyr herbicide under visible light and UV illumination. XRD and Raman spectra indicated that the highly crystalline anatase TiO2 phase and monoclinic and triclinic of WO3 were formed. The mesoporous TiO2 exhibits large pore volumes of 0.267cm(3)g-1 and high surface areas of 180m(2)g(-1) but they become reduced to 0.221cm(3)g(-1) and 113m(2)g(-1), respectively upon WO3 incorporation, with tunable mesopore diameter in the range of 5-6.5nm. TEM images show WO3-TiO2 nanocomposites are quite uniform with 10-15nm of TiO2 and 5-10nm of WO3 sizes. Under UV illumination, the overall photocatalytic efficiency of the 3% WO3-TiO2 nanocomposite is 3.5 and 6.6 times higher than that of mesoporous TiO2 and commercial UV-100 photocatalyst, respectively. The 3% WO3-TiO2 nanocomposite is considered to be the optimum photocatalyst which is able to degrade completely (100% conversion) of imazapyr herbicide along 120min with high photonic efficiency ∼8%. While under visible light illumination, the 0.5% WO3-TiO2 nanocomposite is the optimum photocatalyst which achieves 46% photocatalytic efficiency.
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Affiliation(s)
- Adel A Ismail
- Advanced Materials Department, Central Metallurgical R& D Institute, CMRDI, P.O. Box 87, Helwan 11421 Cairo, Egypt; Advanced Materials and Nano Research Center, Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia.
| | - Ibrahim Abdelfattah
- Water Pollution Research Dept., National Research Centre, 33 EL Bohouth St. (Former EL Tahrir St.), P.O. 12622, Dokki, Giza, Egypt
| | - Ahmed Helal
- Advanced Materials Department, Central Metallurgical R& D Institute, CMRDI, P.O. Box 87, Helwan 11421 Cairo, Egypt
| | - S A Al-Sayari
- Advanced Materials and Nano Research Center, Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia
| | - L Robben
- Chemische Kristallographie fester Stoffe, Universität Bremen, Germany
| | - D W Bahnemann
- Institut für Technische Chemie, Leibniz Universität Hannover, Callinstrasse 3, 30167 Hannover, Germany
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47
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Wu J, Mao W, Wu Z, Xu X, You H, Xue A, Jia Y. Strong pyro-catalysis of pyroelectric BiFeO3 nanoparticles under a room-temperature cold-hot alternation. NANOSCALE 2016; 8:7343-50. [PMID: 26982212 DOI: 10.1039/c6nr00972g] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
A strong pyro-catalytic dye degradation with an ultrahigh degradation efficiency (>99%) in hydrothermally synthesized pyroelectric BiFeO3 nanoparticles was achieved under a room-temperature cold-hot alternating excitation (between 27 °C to 38 °C). The pyro-catalysis originated from a combination of the pyroelectric effect and the electrochemical oxidation-reduction reaction. The intermediate products (hydroxyl radicals and superoxide radicals) of pyro-electro-catalysis were observed. Pyro-catalysis provides a highly efficient and reusable dye wastewater decomposition technology through utilizing environmental day-night temperature variation.
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Affiliation(s)
- Jiang Wu
- Department of Physics, Zhejiang Normal University, Jinhua 321004, China.
| | - Wujian Mao
- Department of Physics, Zhejiang Normal University, Jinhua 321004, China.
| | - Zheng Wu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
| | - Xiaoli Xu
- Department of Physics, Zhejiang Normal University, Jinhua 321004, China.
| | - Huilin You
- Department of Physics, Zhejiang Normal University, Jinhua 321004, China.
| | - A'Xi Xue
- Department of Physics, Zhejiang Normal University, Jinhua 321004, China.
| | - Yanmin Jia
- Department of Physics, Zhejiang Normal University, Jinhua 321004, China.
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48
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Influence of TiO2 phase composition on the photocatalytic activity of TiO2/MWCNT composites prepared by combined sol–gel/hydrothermal method. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.01.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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49
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A novel triphenylamine-based dye sensitizer supported on titania nanoparticles and the effect of titania fabrication on its optical properties. CHEMICAL PAPERS 2016. [DOI: 10.1515/chempap-2015-0192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A new synthesised triphenylamine-based dye having a branched structure with one OH-ending branch able to interact with the surface hydroxyl moieties of mesoporous TiO
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50
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Cen Y, Yao Y, Xu Q, Xia Z, Sisson RD, Liang J. Fabrication of TiO2–graphene composite for the enhanced performance of lithium batteries. RSC Adv 2016. [DOI: 10.1039/c6ra08144d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The controllable synthesis of TiO2 nanostructures with a conformal and ultrathin graphitic carbon coating is critically desirable for new anode material development for Li-ion batteries.
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Affiliation(s)
- Yinjie Cen
- Department of Mechanical Engineering
- Worcester Polytechnic Institute
- Worcester
- 01609 USA
| | - Yuqin Yao
- Department of Mechanical Engineering
- Worcester Polytechnic Institute
- Worcester
- 01609 USA
| | - Quan Xu
- Institute of New Energy
- China University of Petroleum
- Beijing
- 102249 China
| | - Zhenhai Xia
- Department of Materials Science & Engineering
- University of North Texas
- Denton
- 76203 USA
| | - Richard D. Sisson
- Department of Mechanical Engineering
- Worcester Polytechnic Institute
- Worcester
- 01609 USA
| | - Jianyu Liang
- Department of Mechanical Engineering
- Worcester Polytechnic Institute
- Worcester
- 01609 USA
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