1
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Sarngan PP, Lakshmanan A, Dutta A, Sarkar D. Understanding the effect of polymer concentrations on the phase formation and activity of electrospun nanofibrous photocatalyst. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Sarngan PP, Lakshmanan A, Sarkar D. Influence of Anatase-Rutile Ratio on Band Edge Position and Defect States of TiO 2 Homojunction Catalyst. CHEMOSPHERE 2022; 286:131692. [PMID: 34340114 DOI: 10.1016/j.chemosphere.2021.131692] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/19/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
Removal of toxic air and water dissociation in the environment has become a major challenging issue throughout the world. Mixed phase rutile-anatase titanium dioxide catalysts are very effective in photocatalysis and have been studied extensively. However, the mechanism causing this effect and band alignment of the two phases are not fully understood. Pointing to the issue, we have designed one-dimensional mixed-phase TiO2 and introduced defects near the valence band. Experimental results showed that band alignment between two phases, up-shift of the band edge, and optimum anatase percentage play a key role in the enhancement of the photocatalytic activity. We predicted shifts in band edge originating from surface electric dipole layer induced by defects.
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Affiliation(s)
- Pooja P Sarngan
- Applied NanoPhysics Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - Agasthiyaraj Lakshmanan
- Applied NanoPhysics Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - Debabrata Sarkar
- Applied NanoPhysics Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India.
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3
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Lakshmanan A, Sarngan PP, Sarkar D. Inorganic-organic nanofiber networks with antibacteria properties for enhanced particulate filtration: The critical role of amorphous titania. CHEMOSPHERE 2022; 286:131671. [PMID: 34352548 DOI: 10.1016/j.chemosphere.2021.131671] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/17/2021] [Accepted: 07/23/2021] [Indexed: 05/29/2023]
Abstract
The demand for air filter media at indoor and outdoor is increasing tremendously due to air pollution and especially for problems related to airborne particulate matter (PM). To realize that, here a class nanofiber air filter media with strong antibacterial activity, hydrophobic nature, high filtration efficiency with low pressure drop is prepared. Novel organic-inorganic nanocomposite nanofibers used in this work benefited for the multifunctional performance. Amorphous titanium dioxide (mTiO2) is utilized for air filtration application which exhibits excellent enhancement of PM2.5 filtration properties and antibacterial activity. The unique Poly (vinylpyrrolidone) (PVP)-mTiO2 nanofiber air filter media acquired hydrophobic nature with a large increase in water contact angle of 127° from 36°. The resulting free-standing nanofiber filters exhibit high PM2.5 filtration efficiency of >99.9% and low pressure drop of 39 Pa. Antibacterial activity of nanofibrous membrane has been rationally engineered by titanium oxide as the barrier to bacterial ingression. A long term of 160 h filtration test has proved PVP-mTiO2 nanofibers air filter media holds outstanding 99% filtration efficiency for PM2.5. This work takes forward a significant lead in design and production of high performance and very low pressure drop air filter media with a wide range of functional properties.
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Affiliation(s)
- Agasthiyaraj Lakshmanan
- Applied NanoPhysics Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - Pooja P Sarngan
- Applied NanoPhysics Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India
| | - Debabrata Sarkar
- Applied NanoPhysics Laboratory, Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, India.
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4
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Wu P, Zhao X, Li C, Yang M, Li G, Zhang S, Ming J, Liu M, Qian Z, Fang P. One-pot synthesis of Fe 2O 3/Y 2O 3@TNS for enhanced photocatalytic and adsorption properties. NEW J CHEM 2020. [DOI: 10.1039/d0nj01925a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TiO2-based nanosheets (TNS) modified with Fe2O3 and Y2O3 particles (Fe2O3/Y2O3@TNS), possessing a laminar structure with large specific surface area of 382 m2 g−1, were synthesized via a one-pot hydrothermal method.
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Affiliation(s)
- Pei Wu
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
| | - Xiaona Zhao
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
| | - Chunhe Li
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
| | - Minchen Yang
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
| | - Guojun Li
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
| | - Siyi Zhang
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
| | - Julan Ming
- State Grid Zhejiang Electric Power Research Institute
- Hangzhou
- China
| | - Min Liu
- State Grid Zhejiang Electric Power Research Institute
- Hangzhou
- China
| | - Zhouhai Qian
- State Grid Zhejiang Electric Power Research Institute
- Hangzhou
- China
| | - Pengfei Fang
- Department of Physics and Hubei Nuclear Solid Physics Key Laboratory
- Wuhan University
- Wuhan 430072
- China
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5
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Cao Z, Yin Y, Fu P, Li D, Zhou Y, Deng Y, Peng Y, Wang W, Zhou W, Tang D. TiO 2 Nanosheet Arrays with Layered SnS 2 and CoO x Nanoparticles for Efficient Photoelectrochemical Water Splitting. NANOSCALE RESEARCH LETTERS 2019; 14:342. [PMID: 31712915 PMCID: PMC6848439 DOI: 10.1186/s11671-019-3168-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 09/30/2019] [Indexed: 05/14/2023]
Abstract
Converting solar energy into sustainable hydrogen fuel by photoelectrochemical (PEC) water splitting is a promising technology to solve increasingly serious global energy supply and environmental issues. However, the PEC performance based on TiO2 nanomaterials is hindered by the limited sunlight-harvesting ability and its high recombination rate of photogenerated charge carriers. In this work, layered SnS2 absorbers and CoOx nanoparticles decorated two-dimensional (2D) TiO2 nanosheet array photoelectrode have been rationally designed and successfully synthesized, which remarkably enhanced the PEC performance for water splitting. As the result, photoconversion efficiency of TiO2/SnS2/CoOx and TiO2/SnS2 hybrid photoanodes increases by 3.6 and 2.0 times under simulated sunlight illumination, compared with the bare TiO2 nanosheet arrays photoanode. Furthermore, the TiO2/SnS2/CoOx photoanode also presented higher PEC stability owing to CoOx catalyst served as efficient water oxidation catalyst as well as an effective protectant for preventing absorber photocorrosion.
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Affiliation(s)
- Zhou Cao
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yanling Yin
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Peng Fu
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Dong Li
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yulan Zhou
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yuanwen Deng
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Yuehua Peng
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Weike Wang
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Weichang Zhou
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China
| | - Dongsheng Tang
- Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha, 410081, People's Republic of China.
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6
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Jayaraman V, Sarkar D, Rajendran R, Palanivel B, Ayappan C, Chellamuthu M, Mani A. Synergistic effect of band edge potentials on BiFeO 3/V 2O 5 composite: Enhanced photo catalytic activity. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 247:104-114. [PMID: 31234045 DOI: 10.1016/j.jenvman.2019.06.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 05/21/2019] [Accepted: 06/08/2019] [Indexed: 06/09/2023]
Abstract
The BiFeO3/V2O5 has been successfully synthesized by simple annealing of BiFeO3 nanoplates and V2O5 nanoflower. The phase, structural, optical properties and chemical state of the BiFeO3, V2O5 and different composition of BiFeO3/V2O5 samples were comparatively characterized by various spectroscopic and microscopic techniques. The prepared catalyst exhibits unique photo catalytic and post-oxidation/reduction ability for removal of various (MB, Phenol, CV, RhB) water organic pollutants. Compared to pure BiFeO3 and V2O5, the different Wt % of BiFeO3/V2O5 composition exhibited higher photo catalytic activity. The fortunate BiFeO3/V2O5 interface hybrid photo catalyst makes a significant impact in the enhancement of photo catalytic reaction. This remarkable efficiency could be ascribed to the synergistic effect between the V2O5 petals and BiFeO3 plates. The exceptional morphology, increased surface area, uniformity, less-agglomerated spreading could increase the ability of visible light response, which lead the improved electron transport ability and the higher charge separation. The enhanced rate of photo generated charge carriers separations were evinced by the EIS and PL spectrum measurements. The allowed radical trapping experiment divulge that the hole (h+), and super oxide radical (O2-) are the minimized effect in degradation, on the other hand hydroxyl radical (OH) is plays the foremost role and act as the active radicals in the catalytic organism. In relations of above investigation, a probable photo degradation mechanism of the as-synthesized photo catalyst is carefully explicated. This effort delivers an effective approach to design and fabricate the efficient photo catalyst through integrating of materials, which has a potential for industrial waste water purification.
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Affiliation(s)
- Venkatesan Jayaraman
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram, 603203, Tamil Nadu, India
| | - Debabrata Sarkar
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram, 603203, Tamil Nadu, India
| | - Ranjith Rajendran
- Advanced Materials Laboratory, Department of Physics, Periyar University, Salem, 636 011, Tamilnadu, India
| | - Baskaran Palanivel
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram, 603203, Tamil Nadu, India
| | - Chinnadurai Ayappan
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram, 603203, Tamil Nadu, India
| | - Muthamizhchelvan Chellamuthu
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram, 603203, Tamil Nadu, India
| | - Alagiri Mani
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Kancheepuram, 603203, Tamil Nadu, India.
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7
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Noman MT, Ashraf MA, Ali A. Synthesis and applications of nano-TiO 2: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:3262-3291. [PMID: 30523526 DOI: 10.1007/s11356-018-3884-z] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/27/2018] [Indexed: 05/06/2023]
Abstract
TiO2-based nanomaterials have attracted prodigious attention as a photocatalysts in numerous fields of applications. In this thematic issue, the mechanism behind the photocatalytic activity of nano-TiO2 as well as the critical properties have been reviewed in details. The synthesis routes and the variables that affect the size and crystallinity of nano-TiO2 have also been discussed in detail. Moreover, a newly emerged class of color TiO2, TiO2 in aerogel form, nanotubes form, doped and undoped form, and other forms of TiO2 have been discussed in details. Photocatalytic and photovoltaic applications and the type of nano-TiO2 that is more suitable for these applications have been discussed in this review.
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Affiliation(s)
- Muhammad Tayyab Noman
- Department of Material Engineering, Technical University of Liberec, Liberec, Czech Republic.
| | - Muhammad Azeem Ashraf
- Department of Fibre and Textile Technology, University of Agriculture, Faisalabad, Pakistan
| | - Azam Ali
- Department of Material Engineering, Technical University of Liberec, Liberec, Czech Republic
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8
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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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9
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Santra S, Das NS, Besra N, Banerjee D, Chattopadhyay KK. Graphene-Anchored p-Type CuBO 2 Nanocrystals for a Transparent Cold Cathode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9961-9971. [PMID: 28837774 DOI: 10.1021/acs.langmuir.7b01650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
CuBO2 nanostructures were synthesized by employing a low-cost hydrothermal technique to combine into the CuBO2-RGO nanocomposite for the first time using chemically prepared graphene sheets. The nanohybrid samples were characterized for structural information using X-ray diffraction (XRD) that revealed the proper crystalline phase formation of CuBO2 unaltered by composite formation with graphene. Raman spectroscopic studies were employed to confirm the presence of graphene. A morphological study with field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) suggested the proper wrapping of RGO sheets over CuBO2 nanocubes. Moreover, the close proximity of lattice planes of CuBO2 and RGO to each other was observed in high-resolution TEM studies that were correlated with the Raman spectroscopic studies. Finally, the samples were characterized to study the field emission (FE) properties of the same using a laboratory-made high-vacuum field-emission setup. Finite-element-based theoretical simulation studies were carried out to explain and compare the field emission properties with the experimental results. The FE properties of the composite samples were found to be tuned by the nature of wrapping the RGO sheets over the CuBO2 nanocubes, which was typically dependent upon the spiky morphology of the nanocubes.
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Affiliation(s)
- S Santra
- Thin Film & Nanoscience Laboratory, Department of Physics and ‡School of Materials Science and Nanotechnology, Jadavpur University , Kolkata 700 032, India
| | - N S Das
- Thin Film & Nanoscience Laboratory, Department of Physics and ‡School of Materials Science and Nanotechnology, Jadavpur University , Kolkata 700 032, India
| | - N Besra
- Thin Film & Nanoscience Laboratory, Department of Physics and ‡School of Materials Science and Nanotechnology, Jadavpur University , Kolkata 700 032, India
| | - D Banerjee
- Thin Film & Nanoscience Laboratory, Department of Physics and ‡School of Materials Science and Nanotechnology, Jadavpur University , Kolkata 700 032, India
| | - K K Chattopadhyay
- Thin Film & Nanoscience Laboratory, Department of Physics and ‡School of Materials Science and Nanotechnology, Jadavpur University , Kolkata 700 032, India
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10
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Xue C, Zhang T, Ding S, Wei J, Yang G. Anchoring Tailored Low-Index Faceted BiOBr Nanoplates onto TiO 2 Nanorods to Enhance the Stability and Visible-Light-Driven Catalytic Activity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16091-16102. [PMID: 28440617 DOI: 10.1021/acsami.7b00433] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, a fantastic one-dimensional (1D) BiOBr/TiO2 nanorod (NR) heterojunction composite was rationally proposed and designed from the perspective of molecular and interface engineering. The fabricated intimately connected interfacial heterojunction between two-dimensional BiOBr nanoplates and 1D TiO2 NRs acts as an interfacial nanochannel to promote efficient interfacial charge migration and separation of photogenerated electron-hole pairs. As a result, 1D BiOBr/TiO2 NR heterojunctions exhibited outstanding visible-light photocatalytic activities and sustained cycling performance. Under visible-light irradiation for 120 min, the reduction efficiency of Cr(VI) over the TB-2 sample (molar ratio: n(Ti)/n(Bi) = 2:1) is as high as 95.4% without adding any scavengers. Furthermore, the sample also shows excellent photodegradation activity of RhB with a much higher apparent rate constant of 0.49 min-1 and 88.5% total organic carbon removal ratio. Furthermore, the corresponding mechanism of enhanced photocatalytic activity is proposed according to comprehensively investigated results from photoluminescence spectroscopy, photoelectrochemical measurement analysis, and radical trapping experiments. This study provides an attractive avenue to design and fabricate highly efficient 1D NR heterojunction photocatalysts, which possessed a high application value in the field of environmental remediation, especially for wastewater purification.
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Affiliation(s)
- Chao Xue
- Department of Chemical Engineering, School of Chemical Engineering and Technology and ‡Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Tianxi Zhang
- Department of Chemical Engineering, School of Chemical Engineering and Technology and ‡Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Shujiang Ding
- Department of Chemical Engineering, School of Chemical Engineering and Technology and ‡Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Jinjia Wei
- Department of Chemical Engineering, School of Chemical Engineering and Technology and ‡Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
| | - Guidong Yang
- Department of Chemical Engineering, School of Chemical Engineering and Technology and ‡Department of Applied Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
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11
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Ghosh S, Sarkar S, Das BK, Sen D, Samanta M, Chattopadhyay KK. Band edge tuned ZnxCd1−xS solid solution nanopowders for efficient solar photocatalysis. Phys Chem Chem Phys 2017; 19:29998-30009. [DOI: 10.1039/c7cp06305a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Natural sunlight assisted catalytic activity of hydrothermally synthesized zinc blende ZnxCd1−xS solid solution with theoretical insights.
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Affiliation(s)
- Shrabani Ghosh
- School of Materials Science and Nanotechnology
- Jadavpur University
- Kolkata 700032
- India
| | - Samrat Sarkar
- School of Materials Science and Nanotechnology
- Jadavpur University
- Kolkata 700032
- India
| | - Bikram Kumar Das
- Thinfilm and Nanoscience Laboratory
- Department of Physics
- Jadavpur University
- Kolkata 700032
- India
| | - Dipayan Sen
- Thinfilm and Nanoscience Laboratory
- Department of Physics
- Jadavpur University
- Kolkata 700032
- India
| | - Madhupriya Samanta
- School of Materials Science and Nanotechnology
- Jadavpur University
- Kolkata 700032
- India
| | - Kalyan Kumar Chattopadhyay
- School of Materials Science and Nanotechnology
- Jadavpur University
- Kolkata 700032
- India
- Thinfilm and Nanoscience Laboratory
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12
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Amreetha S, Dhanuskodi S, Nithya A, Jothivenkatachalam K. Three way electron transfer of a C–N–S tri doped two-phase junction of TiO2nanoparticles for efficient visible light photocatalytic dye degradation. RSC Adv 2016. [DOI: 10.1039/c5ra25017j] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
C–N–S tridoped TiO2nanoparticles were synthesized by a sol–gel method using thiourea as a compound source of carbon (C), nitrogen (N) and sulphur (S).
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Affiliation(s)
- S. Amreetha
- Nonlinear Optical Materials Laboratory
- School of Physics
- Bharathidasan University
- Tiruchirappalli 620 024
- India
| | - S. Dhanuskodi
- Nonlinear Optical Materials Laboratory
- School of Physics
- Bharathidasan University
- Tiruchirappalli 620 024
- India
| | - A. Nithya
- Department of Chemistry
- Anna University
- BIT Campus
- Tiruchirappalli 620 024
- India
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13
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Zhao Z, Tian J, Sang Y, Cabot A, Liu H. Structure, synthesis, and applications of TiO2 nanobelts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2557-82. [PMID: 25800706 DOI: 10.1002/adma.201405589] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 02/09/2015] [Indexed: 05/21/2023]
Abstract
TiO2 semiconductor nanobelts have unique structural and functional properties, which lead to great potential in many fields, including photovoltaics, photocatalysis, energy storage, gas sensors, biosensors, and even biomaterials. A review of synthetic methods, properties, surface modification, and applications of TiO2 nanobelts is presented here. The structural features and basic properties of TiO2 nanobelts are systematically discussed, with the many applications of TiO2 nanobelts in the fields of photocatalysis, solar cells, gas sensors, biosensors, and lithium-ion batteries then introduced. Research efforts that aim to overcome the intrinsic drawbacks of TiO2 nanobelts are also highlighted. These efforts are focused on the rational design and modification of TiO2 nanobelts by doping with heteroatoms and/or forming surface heterostructures, to improve their desirable properties. Subsequently, the various types of surface heterostructures obtained by coupling TiO2 nanobelts with metal and metal oxide nanoparticles, chalcogenides, and conducting polymers are described. Further, the charge separation and electron transfer at the interfaces of these heterostructures are also discussed. These properties are related to improved sensitivity and selectivity for specific gases and biomolecules, as well as enhanced UV and visible light photocatalytic properties. The progress in developments of near-infrared-active photocatalysts based on TiO2 nanobelts is also highlighted. Finally, an outline of important directions of future research into the synthesis, modification, and applications of this unique material is given.
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Affiliation(s)
- Zhenhuan Zhao
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China; Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Science, Beijing, 100083, P. R. China
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14
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Gao M, Zhu L, Ong WL, Wang J, Ho GW. Structural design of TiO2-based photocatalyst for H2 production and degradation applications. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00879d] [Citation(s) in RCA: 189] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review aims to provide a comprehensive and contemporary overview, as well as a guide of the development of new generation TiO2 based photocatalysts via structural design for improved solar energy conversion technologies.
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Affiliation(s)
- Minmin Gao
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Liangliang Zhu
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Wei Li Ong
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Jing Wang
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
- Engineering Science Programme
- National University of Singapore
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Jiang L, Huang Y, Liu T. Enhanced visible-light photocatalytic performance of electrospun carbon-doped TiO2/halloysite nanotube hybrid nanofibers. J Colloid Interface Sci 2014; 439:62-8. [PMID: 25463176 DOI: 10.1016/j.jcis.2014.10.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2014] [Revised: 10/17/2014] [Accepted: 10/18/2014] [Indexed: 11/25/2022]
Abstract
In this work, the effects of halloysite nanotubes (HNTs) on the visible-light photocatalytic ability of electrospun carbon doped TiO2/HNT (C-TH) nanofibers have been explored. Structural and morphological investigations demonstrate that incorporation of HNTs into anatase C-TH hybrid nanofibers was easily achieved by using sol-gel processing combined with electrospinning approach, thus HNTs could be uniformly embedded in the electrospun nanofibers. The visible-light photocatalytic efficiency of C-TH hybrid on the degradation of methyl blue (MB) was greatly enhanced with the combination of moderate amount of HNTs (8%), which was 23 times higher than that of commercial anatase TiO2. Mechanism of the enhancing effect of HNTs has been explored by analyzing the dual-effect of adsorption and photocatalysis in various amounts of HNTs incorporated C-TiO2 nanofibers. With nanotubular structure and considerable adsorption ability, incorporated HNTs functioned as porogen agent in C-TH nanofibers. This simple incorporation approach increases the specific surface areas of nanofibers, which improves the mass transport of reactant into the nanofibers and the adsorption of visible-light by scattering, meanwhile may suppress the charge recombination and enhance photoinduced charge separation, thus efficiently enhancing visible-light photocatalytic performance of the C-TH hybrid nanofibers.
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Affiliation(s)
- Ling Jiang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China
| | - Yunpeng Huang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China
| | - Tianxi Liu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, PR China.
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