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Photocatalysis and Li-Ion Battery Applications of {001} Faceted Anatase TiO2-Based Composites. J 2021. [DOI: 10.3390/j4030038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Anatase TiO2 are the most widely used photocatalysts because of their unique electronic, optical and catalytic properties. Surface chemistry plays a very important role in the various applications of anatase TiO2 especially in the catalysis, photocatalysis, energy conversion and energy storage. Control of the surface structure by crystal facet engineering has become an important strategy for tuning and optimizing the physicochemical properties of TiO2. For anatase TiO2, the {001} crystal facets are the most reactive because they exhibit unique surface characteristics such as visible light responsiveness, dissociative adsorption, efficient charge separation capabilities and photocatalytic selectivity. In this review, a concise survey of the literature in the field of {001} dominated anatase TiO2 crystals and their composites is presented. To begin, the existing strategies for the synthesis of {001} dominated anatase TiO2 and their composites are discussed. These synthesis strategies include both fluorine-mediated and fluorine-free synthesis routes. Then, a detailed account of the effect of {001} facets on the physicochemical properties of TiO2 and their composites are reviewed, with a particular focus on photocatalysis and Li-ion batteries applications. Finally, an outlook is given on future strategies discussing the remaining challenges for the development of {001} dominated TiO2 nanomaterials and their potential applications.
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2
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Rashidimoghaddam M, Saljooqi A, Shamspur T, Mostafavi A. Constructing S-doped Ni–Co LDH intercalated with Fe3O4 heterostructure photocatalysts for enhanced pesticide degradation. NEW J CHEM 2020. [DOI: 10.1039/d0nj02772c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A S-doped Ni–Co LDH/Fe3O4 nanocomposite was synthesised and its photocatalytic activity was tested for the degradation of CP.
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Affiliation(s)
| | - Asma Saljooqi
- Department of Chemistry
- Shahid Bahonar University of Kerman
- Kerman
- Iran
- Young Research Society
| | - Tayebeh Shamspur
- Department of Chemistry
- Shahid Bahonar University of Kerman
- Kerman
- Iran
| | - Ali Mostafavi
- Department of Chemistry
- Shahid Bahonar University of Kerman
- Kerman
- Iran
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3
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Engineering an ultrathin amorphous TiO2 layer for boosting the weatherability of TiO2 pigment with high lightening power. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2019.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Chen Y, Zou L, Zhang X, Huang Q, Yu H. Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF
4
: Tm@TiO
2. ChemistrySelect 2019. [DOI: 10.1002/slct.201900125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yanjie Chen
- State Key Laboratory of Photocatalysis on Energy and EnvironmentKey Laboratory of Eco-materials Advanced Technology (Fuzhou University)Fujian Province UniversityCollege of Materials Science and EngineeringFuzhou University, Fuzhou, Fujian 350108 China
| | - Liang Zou
- State Key Laboratory of Photocatalysis on Energy and EnvironmentKey Laboratory of Eco-materials Advanced Technology (Fuzhou University)Fujian Province UniversityCollege of Materials Science and EngineeringFuzhou University, Fuzhou, Fujian 350108 China
| | - Xinqi Zhang
- Instrumentation Analysis and Research CenterFuzhou University, Fuzhou Fujian 350002 China
| | - Qingming Huang
- Instrumentation Analysis and Research CenterFuzhou University, Fuzhou Fujian 350002 China
| | - Han Yu
- State Key Laboratory of Photocatalysis on Energy and EnvironmentKey Laboratory of Eco-materials Advanced Technology (Fuzhou University)Fujian Province UniversityCollege of Materials Science and EngineeringFuzhou University, Fuzhou, Fujian 350108 China
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5
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Gurusamy S, Kulanthaisamy MR, Hari DG, Veleeswaran A, Thulasinathan B, Muthuramalingam JB, Balasubramani R, Chang SW, Arasu MV, Al-Dhabi NA, Selvaraj A, Alagarsamy A. Environmental friendly synthesis of TiO 2-ZnO nanocomposite catalyst and silver nanomaterilas for the enhanced production of biodiesel from Ulva lactuca seaweed and potential antimicrobial properties against the microbial pathogens. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 193:118-130. [PMID: 30849710 DOI: 10.1016/j.jphotobiol.2019.02.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/20/2019] [Accepted: 02/26/2019] [Indexed: 12/19/2022]
Abstract
TiO2-ZnO heterogeneous catalytic system provides a good replacement of a homogeneous catalytic reaction due to its easier recovery. In this study, biodiesel was produced from Ulva lactuca seaweeds using TiO2-ZnO nanocomposite catalysts with particle size of ~12 nm. The size controlled TiO2-ZnO nanocomposite was characterized by powder XRD analysis and TEM. The result of that TiO2-ZnO catalyst is a promising catalyst for the production of biodiesel under mild reaction conditions and high yield of hydroxydecanoic acid conversion of 82.8%. The various conditions optimized for the higher conversion to FAME (15.8 ml of FAME) were 4 wt% catalysts at 4 h under 60 °C and further there is no increase of conversion to FAME above 60 °C-80 °C. The total product yield was calculated as 82.8% of conversion to FAME. The evaluated biodiesel was found to be up to the mark of ASTM standards. The silver nanoparticles (AgNPs) were synthesized by using leftover biomass of algae obtaining after lipid extraction of U.lactuca. AgNPs particle size was achieved as ~12 nm and was confirmed by UV-Visible spectroscopy, XRD and TEM analysis. Antibacterial activities of the synthesized AgNPs were analyzed and compared. The antibacterial activity was excellent against bacterial pathogens and treatment against P. vulgaris shows the maximum zone of inhibition (13.8 mm). The present work identified that the unutilized bioresource such as U.lactuca can be effectively utilized for biodiesel production so as to replace fossil fuel usage.
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Affiliation(s)
| | - Mohan Rasu Kulanthaisamy
- Department of Energy Science, Alagappa University, Karaikudi, India; Department of Microbiology, Alagappa University, Karaikudi, India
| | - Dinesh Gujuluva Hari
- Department of Energy Science, Alagappa University, Karaikudi, India; Department of Microbiology, Alagappa University, Karaikudi, India
| | - Ananthi Veleeswaran
- Department of Microbiology, Alagappa University, Karaikudi, India; Department of Zoology and Microbiology, Thiagarajar College, Madurai, India
| | | | | | - Ravindran Balasubramani
- Department of Environmental Energy and Engineering, Kyonggi University, Youngtong - Gu, Suwon 16227, Republic of Korea.
| | - Soon Woong Chang
- Department of Environmental Energy and Engineering, Kyonggi University, Youngtong - Gu, Suwon 16227, Republic of Korea
| | - Mariadhas Valan Arasu
- Department of Botany and Microbiology, College of Sciences, King Saud University, Saudi Arabia
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, College of Sciences, King Saud University, Saudi Arabia
| | - Arokiyaraj Selvaraj
- Department of Food Science and Biotechnology, Sejong University, Seoul, Republic of Korea
| | - Arun Alagarsamy
- Department of Microbiology, Alagappa University, Karaikudi, India.
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6
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Li W, Elzatahry A, Aldhayan D, Zhao D. Core-shell structured titanium dioxide nanomaterials for solar energy utilization. Chem Soc Rev 2018; 47:8203-8237. [PMID: 30137079 DOI: 10.1039/c8cs00443a] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Because of its unmatched resource potential, solar energy utilization currently is one of the hottest research areas. Much effort has been devoted to developing advanced materials for converting solar energy into electricity, solar fuels, active chemicals, or heat. Among them, TiO2 nanomaterials have attracted much attention due to their unique properties such as low cost, nontoxicity, good stability and excellent optical and electrical properties. Great progress has been made, but research opportunities are still present for creating new nanostructured TiO2 materials. Core-shell structured nanomaterials are of great interest as they provide a platform to integrate multiple components into a functional system, showing improved or new physical and chemical properties, which are unavailable from the isolated components. Consequently, significant effort is underway to design, fabricate and evaluate core-shell structured TiO2 nanomaterials for solar energy utilization to overcome the remaining challenges, for example, insufficient light absorption and low quantum efficiency. This review strives to provide a comprehensive overview of major advances in the synthesis of core-shell structured TiO2 nanomaterials for solar energy utilization. This review starts from the general protocols to construct core-shell structured TiO2 nanomaterials, and then discusses their applications in photocatalysis, water splitting, photocatalytic CO2 reduction, solar cells and photothermal conversion. Finally, we conclude with an outlook section to offer some insights on the future directions and prospects of core-shell structured TiO2 nanomaterials and solar energy conversion.
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Affiliation(s)
- Wei Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, P. R. China.
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7
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Kong F, Xia Y, Jiao X, Chen D. Preparation of annular TiO2 nanoparticles constructed by high-energy surfaces and enhanced visible-light photocatalytic activity. NEW J CHEM 2017. [DOI: 10.1039/c7nj01560g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Annular TiO2 nanoparticles were synthesized through a combined solvothermal and etching process.
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Affiliation(s)
- Fanxia Kong
- School of Chemistry & Chemical Engineering
- National Engineering Research Center for Colloidal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Yuguo Xia
- School of Chemistry & Chemical Engineering
- National Engineering Research Center for Colloidal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Xiuling Jiao
- School of Chemistry & Chemical Engineering
- National Engineering Research Center for Colloidal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Dairong Chen
- School of Chemistry & Chemical Engineering
- National Engineering Research Center for Colloidal Materials
- Shandong University
- Jinan 250100
- P. R. China
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8
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Controlled Synthesis of Recyclable, Porous FMO/C@TiO2Core-Shell Nanofibers with High Adsorption and Photocatalysis Properties for the Efficient Treatment of Dye Wastewater. Chempluschem 2016; 81:282-291. [DOI: 10.1002/cplu.201500534] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 01/10/2016] [Indexed: 11/07/2022]
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9
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Ghayempour S, Montazer M, Mahmoudi Rad M. Tragacanth gum biopolymer as reducing and stabilizing agent in biosonosynthesis of urchin-like ZnO nanorod arrays: A low cytotoxic photocatalyst with antibacterial and antifungal properties. Carbohydr Polym 2016; 136:232-41. [DOI: 10.1016/j.carbpol.2015.09.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 08/26/2015] [Accepted: 09/01/2015] [Indexed: 11/25/2022]
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10
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Zhang YN, Tian H, Zhao G. Enhanced Visible-Light Photoelectrocatalytic Activity of {001}TiO2Electrodes Assisted with Carbon Quantum Dots. ChemElectroChem 2015. [DOI: 10.1002/celc.201500246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ya-nan Zhang
- Department of Chemistry and; Shanghai Key Laboratory of Chemical Assessment and Sustainability; Tongji University, 1239; Siping Road Shanghai 200092 China
| | - Hongyi Tian
- Department of Chemistry and; Shanghai Key Laboratory of Chemical Assessment and Sustainability; Tongji University, 1239; Siping Road Shanghai 200092 China
| | - Guohua Zhao
- Department of Chemistry and; Shanghai Key Laboratory of Chemical Assessment and Sustainability; Tongji University, 1239; Siping Road Shanghai 200092 China
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11
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Rapid degradation of methylene blue in a novel heterogeneous Fe3O4 @rGO@TiO2-catalyzed photo-Fenton system. Sci Rep 2015; 5:10632. [PMID: 26000975 PMCID: PMC4441169 DOI: 10.1038/srep10632] [Citation(s) in RCA: 166] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/23/2015] [Indexed: 12/23/2022] Open
Abstract
Herein, a ternary nanocomposite with TiO2 nanoparticles anchored on reduced graphene oxide (rGO)-encapsulated Fe3O4 spheres (Fe3O4@rGO@TiO2) is presented as a high efficient heterogeneous catalyst for photo-Fenton degradation of recalcitrant pollutants under neutral pH. Fe3O4@rGO@TiO2 was synthesized by depositing TiO2 nanoparticles on the surface of the Fe3O4 spheres wrapped by graphene oxide (GO) which was obtained by an electrostatic layer-by-layer method. This as-prepared catalyst reflected good ferromagnetism and superior stability which makes it convenient to be separated and recycled. Due to the synergic effects between the different components composed the catalyst, swift reduction of Fe(3+) can be achieved to regenerate Fe(2+). Fe3O4@rGO@TiO2 exhibited enhancing catalytic activity for the degradation of azo-dyes compared with Fe3O4, Fe3O4@SiO2@TiO2 or SiO2@rGO@TiO2, further conforming the rapid redox reaction between Fe(2+) and Fe(3+). All these merits indicate that the composite catalyst possesses great potential for visible-light driven destruction of organic compounds.
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12
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Romero L, Piccirillo C, Castro PML, Bowman C, Warwick MEA, Binions R. Titanium Dioxide Thin Films Deposited by Electric Field-Assisted CVD: Effect on Antimicrobial and Photocatalytic Properties**. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/cvde.201407145] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Luz Romero
- School of Engineering and Materials Science; Queen Mary University of London; Mile End Road London E1 4NS United Kingdom
| | - Clara Piccirillo
- Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior Biotecnologia; Universidade Católica Portuguesa; Porto Portugal
| | - Paula M. L. Castro
- Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior Biotecnologia; Universidade Católica Portuguesa; Porto Portugal
| | - Christopher Bowman
- Department of Chemistry; Christopher Ingold Laboratories; University College London; 20 Gordon Street London WC1H 0AJ United Kingdom
| | - Michael E. A. Warwick
- Department of Chemistry; Christopher Ingold Laboratories; University College London; 20 Gordon Street London WC1H 0AJ United Kingdom
- UCL Energy Institute; Central House; 14 Upper Woburn Place London WC1H 0NN United Kingdom
| | - Russell Binions
- School of Engineering and Materials Science; Queen Mary University of London; Mile End Road London E1 4NS United Kingdom
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13
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Wang H, Fu Y, Han T, Wan J, Zheng X. Adsorption and photocatalytic behavior of titanate nanotubes sensitized with zinc tetra(4-carboxyphenyl) porphyrin. RSC Adv 2015. [DOI: 10.1039/c5ra01330e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effect of calcination temperature and ZnTCPP sensitizer on the morphology of ZnTCPP–TNTS.
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Affiliation(s)
- Huigang Wang
- Department of Chemistry and Engineering Research Center for Eco-dyeing and Finishing of Textiles
- MOE
- Zhejiang Sci-Tech University
- State Key Laboratory of ATMMT(MOE)
- Hangzhou 310018
| | - Ying Fu
- Department of Chemistry and Engineering Research Center for Eco-dyeing and Finishing of Textiles
- MOE
- Zhejiang Sci-Tech University
- State Key Laboratory of ATMMT(MOE)
- Hangzhou 310018
| | - Tiehu Han
- Department of Chemistry and Engineering Research Center for Eco-dyeing and Finishing of Textiles
- MOE
- Zhejiang Sci-Tech University
- State Key Laboratory of ATMMT(MOE)
- Hangzhou 310018
| | - Junmin Wan
- Department of Chemistry and Engineering Research Center for Eco-dyeing and Finishing of Textiles
- MOE
- Zhejiang Sci-Tech University
- State Key Laboratory of ATMMT(MOE)
- Hangzhou 310018
| | - Xuming Zheng
- Department of Chemistry and Engineering Research Center for Eco-dyeing and Finishing of Textiles
- MOE
- Zhejiang Sci-Tech University
- State Key Laboratory of ATMMT(MOE)
- Hangzhou 310018
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14
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Li B, Zhao Z, Zhou Q, Meng B, Meng X, Qiu J. Highly Efficient Low-Temperature Plasma-Assisted Modification of TiO2Nanosheets with Exposed {001} Facets for Enhanced Visible-Light Photocatalytic Activity. Chemistry 2014; 20:14763-70. [DOI: 10.1002/chem.201402664] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 06/03/2014] [Indexed: 11/12/2022]
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15
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Sun J, Fan H, Nan B, Ai S. Fe3O4@LDH@Ag/Ag3PO4 submicrosphere as a magnetically separable visible-light photocatalyst. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.04.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Mary Jacob N, Madras G, Kottam N, Thomas T. Multivalent Cu-Doped ZnO Nanoparticles with Full Solar Spectrum Absorbance and Enhanced Photoactivity. Ind Eng Chem Res 2014. [DOI: 10.1021/ie404378z] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | | | - Nagaraju Kottam
- Department of Chemistry, M.S. Ramaiah Institute of Technology, Bangalore-560012, Karnataka, India
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Ong WJ, Tan LL, Chai SP, Yong ST, Mohamed AR. Facet-dependent photocatalytic properties of TiO(2) -based composites for energy conversion and environmental remediation. CHEMSUSCHEM 2014; 7:690-719. [PMID: 24532412 DOI: 10.1002/cssc.201300924] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Indexed: 05/10/2023]
Abstract
Titanium dioxide (TiO2 ) is one of the most widely investigated metal oxides because of its extraordinary surface, electronic, and photocatalytic properties. However, the large band gap of TiO2 and the considerable recombination of photogenerated electron-hole pairs limit its photocatalytic efficiency. Therefore, research attention is being increasingly directed towards engineering the surface structure of TiO2 on the atomic level (namely morphological control of {001} facets on the micro- and nanoscale) to fine-tune its physicochemical properties; this could ultimately lead to the optimization of selectivity and reactivity. This Review encompasses the fundamental principles to enhance the photocatalytic activity by using highly reactive {001}-faceted TiO2 -based composites. The current progress of such composites, with particular emphasis on the photodegradation of pollutants and photocatalytic water splitting for hydrogen generation, is also discussed. The progresses made are thoroughly examined for achieving remarkable photocatalytic performances, with additional insights with regard to charge transfer. Finally, a summary and some perspectives on the challenges and new research directions for future exploitation in this emerging frontier are provided, which hopefully would allow for harnessing the outstanding structural and electronic properties of {001} facets for various energy- and environmental-related applications.
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Affiliation(s)
- Wee-Jun Ong
- Low Carbon Economy (LCE) Group, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, Bandar Sunway, 46150, Selangor (Malaysia), Fax: (+603) 55146234
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18
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Zhou X, Xu Q, Lei W, Zhang T, Qi X, Liu G, Deng K, Yu J. Origin of tunable photocatalytic selectivity of well-defined α-Fe(2)O(3) nanocrystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:674-679. [PMID: 24115643 DOI: 10.1002/smll.201301870] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 08/03/2013] [Indexed: 06/02/2023]
Abstract
Visible-light induced degradation of an aqueous mixture containing MO and RhB on well-defined α-Fe2 O3 nanocrystals shows that MO degradation is more favorable and such selectivity on the {012} facet is greater than that on {001}. The origin of selectivity is rationalized as the inherent surface structural difference and preferential molecular adsorption.
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Affiliation(s)
- Xuemei Zhou
- National Center for Nanoscience and Technology, Beijing, 100190, China
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19
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Ong WJ, Tan LL, Chai SP, Yong ST, Mohamed AR. Highly reactive {001} facets of TiO2-based composites: synthesis, formation mechanism and characterization. NANOSCALE 2014; 6:1946-2008. [PMID: 24384624 DOI: 10.1039/c3nr04655a] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Titanium dioxide (TiO2) is one of the most widely investigated metal oxides due to its extraordinary surface, electronic and catalytic properties. However, the large band gap of TiO2 and massive recombination of photogenerated electron-hole pairs limit its photocatalytic and photovoltaic efficiency. Therefore, increasing research attention is now being directed towards engineering the surface structure of TiO2 at the most fundamental and atomic level namely morphological control of {001} facets in the range of microscale and nanoscale to fine-tune its physicochemical properties, which could ultimately lead to the optimization of its selectivity and reactivity. The synthesis of {001}-faceted TiO2 is currently one of the most active interdisciplinary research areas and demonstrations of catalytic enhancement are abundant. Modifications such as metal and non-metal doping have also been extensively studied to extend its band gap to the visible light region. This steady progress has demonstrated that TiO2-based composites with {001} facets are playing and will continue to play an indispensable role in the environmental remediation and in the search for clean and renewable energy technologies. This review encompasses the state-of-the-art research activities and latest advancements in the design of highly reactive {001} facet-dominated TiO2via various strategies, including hydrothermal/solvothermal, high temperature gas phase reactions and non-hydrolytic alcoholysis methods. The stabilization of {001} facets using fluorine-containing species and fluorine-free capping agents is also critically discussed in this review. To overcome the large band gap of TiO2 and rapid recombination of photogenerated charge carriers, modifications are carried out to manipulate its electronic band structure, including transition metal doping, noble metal doping, non-metal doping and incorporating graphene as a two-dimensional (2D) catalyst support. The advancements made in these aspects are thoroughly examined, with additional insights related to the charge transfer events for each strategy of the modified-TiO2 composites. Finally, we offer a summary and some invigorating perspectives on the major challenges and new research directions for future exploitation in this emerging frontier, which we hope will advance us to rationally harness the outstanding structural and electronic properties of {001} facets for various environmental and energy-related applications.
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Affiliation(s)
- Wee-Jun Ong
- Low Carbon Economy (LCE) Group, Chemical Engineering Discipline, School of Engineering, Monash University, Jalan Lagoon Selatan, Bandar Sunway, 46150, Selangor, Malaysia.
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Wang W, Huang W, Ni Y, Lu C, Xu Z. Different upconversion properties of β-NaYF4:Yb3+,Tm3+/Er3+ in affecting the near-infrared-driven photocatalytic activity of high-reactive TiO2. ACS APPLIED MATERIALS & INTERFACES 2014; 6:340-348. [PMID: 24245742 DOI: 10.1021/am404389g] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Double-shell-structured β-NaYF4:Yb(3+),Tm(3+)/Er(3+)@SiO2@TiO2 upconversion photocatalysts have been successfully synthesized by a simple hydrothermal method. It is found that the double-shell-structured photocatalyst consists of uniform β-NaYF4:Yb(3+),Tm(3+)/Er(3+) nanocrystals, SiO2 as the media shell, and anatase TiO2 nanocrystals exposed with the high-reactive {001} facets as the outer shell. The TiO2 shell is modified to absorb both the UV and visible light in order to make sufficient use of the upconverted light from β-NaYF4:Yb(3+),Tm(3+)/Er(3+) for photocatalysis. Effective energy transfer from β-NaYF4:Yb(3+),Tm(3+)/Er(3+) to TiO2 and its importance are confirmed. The photocatalytic activity in the degradation of Rhodamine B (RhB) under the near-infrared (NIR) (980 nm laser) irradiation suggests that the NIR-driven photocatalytic activity of the double-shell-structured photocatalyst is significantly dependent on the properties of the upconversion materials and the irradiated NIR power density. Moreover, the NIR-driven photocatalyst shows stable photocatalytic degradation of RhB in the recycled tests. This study suggests a promising system and a new insight to understand the application of appropriate upconversion materials to effectively utilize the NIR for photocatalytic applications of TiO2-based photocatalysts, which may advance the application of solar energy in the future.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Materials-Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing University of Technology , Nanjing, Jiangsu 210009, PR China
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Su W, Zhang T, Li L, Xing J, He M, Zhong Y, Li Z. Synthesis of small yolk–shell Fe3O4@TiO2 nanoparticles with controllable thickness as recyclable photocatalysts. RSC Adv 2014. [DOI: 10.1039/c3ra47461e] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Zhang X, Zhu Y, Yang X, Wang S, Shen J, Lin B, Li C. Enhanced visible light photocatalytic activity of interlayer-isolated triplex Ag@SiO2@TiO2 core-shell nanoparticles. NANOSCALE 2013; 5:3359-66. [PMID: 23467326 DOI: 10.1039/c3nr00044c] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Herein, we demonstrate the design and fabrication of a well dispersed triplex Ag@SiO2@TiO2 core-shell photocatalyst, which shows enhanced visible light photocatalytic activity due to the plasmonic field of the inner Ag core. The SiO2 interlayer is coated on the Ag core by a sol-gel process to prevent oxidation of Ag and adjusting the plasmonic field. The Ag@SiO2@TiO2 nanoparticles with systematic variation of the SiO2 interlayer thickness of 2, 4, 8, 20 nm and TiO2 shell thickness of 2, 10, 20, 40 nm are prepared. The enhancement of the photocatalytic efficiency increases with decreased SiO2 thickness. Nanoparticles with a 2 nm SiO2 interlayer and a 20 nm TiO2 shell exhibited the best photocatalytic performance, ca. 31 times larger in photocatalytic activity and ca. 38 times larger in photocurrent density than P25 under visible light. A brief mechanism relating the plasmon resonance energy transfer from Ag to TiO2 and scattering is proposed. Such an intriguing photocatalyst may find significant applications in various fields.
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Affiliation(s)
- Xiaoqing Zhang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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Jing L, Zhou W, Tian G, Fu H. Surface tuning for oxide-based nanomaterials as efficient photocatalysts. Chem Soc Rev 2013; 42:9509-49. [DOI: 10.1039/c3cs60176e] [Citation(s) in RCA: 515] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Liu B, Yu S, Wang Q, Hu W, Jing P, Liu Y, Jia W, Liu Y, Liu L, Zhang J. Hollow mesoporous ceria nanoreactors with enhanced activity and stability for catalytic application. Chem Commun (Camb) 2013; 49:3757-9. [DOI: 10.1039/c3cc40665b] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Senapati S, Srivastava SK, Singh SB. Synthesis, characterization and photocatalytic activity of magnetically separable hexagonal Ni/ZnO nanostructure. NANOSCALE 2012; 4:6604-12. [PMID: 22975724 DOI: 10.1039/c2nr31831h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The hexagonal zinc oxide coated nickel (Ni/ZnO) nanostructure photocatalyst has successfully been prepared by the reduction of nickel chloride hexahydrate using hydrazine hydrate through the solvothermal process at 140 °C followed by surface modification of the product by the reflux method at 110 °C for 1 h. The X-ray diffraction (XRD) pattern showed that the 'as prepared' sample consists of face centered cubic Ni and hexagonal wurtzite ZnO without any traces of impurity. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images confirmed the formation of nickel nanoparticles under solvothermal conditions. These nickel nanoparticles, when subjected to reflux, formed the hexagonal zinc oxide coated nickel nanostructure. Fourier transform infrared (FTIR) spectra, photoluminescence (PL) and Raman studies also confirmed the presence of zinc oxide in the hybrid nanostructure. The growth mechanism for the development of the hexagonal zinc oxide coated nickel (Ni/ZnO) nanostructure has also been proposed. The appearance of the hysteresis loop, in the as-prepared Ni/ZnO hybrid nanostructure, demonstrated its ferromagnetic character at room temperature. The hexagonal Ni/ZnO nanostructure also acts as an efficient photocatalyst in the degradation of methylene blue under ultraviolet light irradiation. It is observed that the catalytic efficiency of the hybrid nanocatalyst is better compared to pure zinc oxide. Most importantly, the Ni/ZnO catalyst could also be easily separated, simply by applying an external magnetic field, and reused.
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Affiliation(s)
- Samarpita Senapati
- Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India
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