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Dong M, Luo Q, Li J, Wu Z, Liu Z. Lithium adsorption properties of porous LiAl-layered double hydroxides synthesized using surfactants. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2022.101535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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BiOCl microspheres with controllable oxygen vacancies: Synthesis and their enhanced photocatalytic performance. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2021.122751] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Xu Q, Li D, Zhou H, Chen B, Wang J, Wang SB, Chen A, Jiang N. MnO 2-coated porous Pt@CeO 2 core-shell nanostructures for photoacoustic imaging-guided tri-modal cancer therapy. NANOSCALE 2021; 13:16499-16508. [PMID: 34585196 DOI: 10.1039/d1nr03246a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We describe the synthesis of MnO2-coated porous Pt@CeO2 core-shell nanostructures (Pt@CeO2@MnO2) as a new theranostic nano-platform. The porous Pt cores endow the core-shell nanostructures with high photothermal conversion efficiency (80%) in the near-infrared region, allowing for photothermal therapy (PTT) and photoacoustic imaging (PA) of tumors. The combination of the Pt core and porous CeO2 interlayer enhances the separation of photo-generated electrons and holes, which is beneficial for the generation of singlet oxygen. With the porous structures of the cores and interlayers, the Pt@CeO2@MnO2 nanostructures are further loaded with an anti-cancer drug (doxorubicin, DOX). The degradation of the MnO2 shell in the tumor microenvironment (TME) can generate O2 for enhanced photodynamic therapy (PDT) and simultaneously trigger DOX release. PA imaging shows good accumulation and retention of DOX-loaded Pt@CeO2@MnO2 in tumors, which guides precise laser irradiation to initiate combined PTT and PDT. The synergistic PTT/PDT/chemotherapy demonstrated by DOX-loaded Pt@CeO2@MnO2 yields remarkable therapeutic outcomes in vitro and in vivo. Taken together, our DOX-loaded Pt@CeO2@MnO2 provides a new avenue for designing high-performance nano-platforms for imaging and therapeutics.
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Affiliation(s)
- Qing Xu
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Danyang Li
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Haijun Zhou
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Biaoqi Chen
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, P. R. China
| | - Junlei Wang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
| | - Shi-Bin Wang
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, P. R. China
| | - Aizheng Chen
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, P. R. China
| | - Nina Jiang
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, P. R. China
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, P. R. China
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4
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Wang X, Liu X, Liu G, Zhang C, Liu G, Xu S, Cui P, Li D. Rapid synthesis of BiOCl graded microspheres with highly exposed (110) facets and oxygen vacancies at room temperature to enhance visible light photocatalytic activity. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.105769] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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5
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Flower-like Bi2S3 nanostructures grown on nitrogen-doped reduced graphene oxide for electrochemical determination of hydrogen peroxide. J Colloid Interface Sci 2018; 530:361-371. [DOI: 10.1016/j.jcis.2018.06.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/18/2018] [Accepted: 06/23/2018] [Indexed: 11/19/2022]
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PdCo/Pd-Hexacyanocobaltate Hybrid Nanoflowers: Cyanogel-Bridged One-Pot Synthesis and Their Enhanced Catalytic Performance. Sci Rep 2016; 6:32402. [PMID: 27573057 PMCID: PMC5004103 DOI: 10.1038/srep32402] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/03/2016] [Indexed: 01/12/2023] Open
Abstract
Elaborate architectural manipulation of nanohybrids with multi-components into controllable 3D hierarchical structures is of great significance for both fundamental scientific interest and realization of various functionalities, yet remains a great challenge because different materials with distinct physical/chemical properties could hardly be incorporated simultaneously into the synthesis process. Here, we develop a novel one-pot cyanogel-bridged synthetic approach for the generation of 3D flower-like metal/Prussian blue analogue nanohybrids, namely PdCo/Pd-hexacyanocobaltate for the first time. The judicious introduction of polyethylene glycol (PEG) and the formation of cyanogel are prerequisite for the successful fabrication of such fascinating hierarchical nanostructures. Due to the unique 3D hierarchical structure and the synergistic effect between hybrid components, the as-prepared hybrid nanoflowers exhibit a remarkable catalytic activity and durability toward the reduction of Rhodamine B (RhB) by NaBH4. We expect that the obtained hybrid nanoflowers may hold great promises in water remediation field and beyond. Furthermore, the facile synthetic strategy presented here for synthesizing functional hybrid materials can be extendable for the synthesis of various functional hybrid nanomaterials owing to its versatility and feasibility.
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7
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Metastable γ-Bi2O3 tetrahedra: Phase-transition dominated by polyethylene glycol, photoluminescence and implications for internal structure by etch. J Colloid Interface Sci 2015; 454:238-44. [PMID: 26037273 DOI: 10.1016/j.jcis.2015.05.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 04/28/2015] [Accepted: 05/01/2015] [Indexed: 11/22/2022]
Abstract
Metastable γ-Bi2O3 tetrahedra have been fabricated by a facile polyethylene glycol-assistance (PEG, Mw=400) one-step precipitation method at 70°C. The tetrahedra of 8μm are built up of ultrathin nanosheets via layer-by-layer self-assembly. X-ray powder diffraction, scanning electron microscopy, UV-visible spectrometer and fluorescence spectrophotometer were employed to characterize the obtained γ-Bi2O3. The morphology of the γ-Bi2O3 is significantly influenced by the feeding concentration of NaOH solution. Tetrahedra and incomplete tetrahedra whose edges are clipped in various degrees of γ-Bi2O3 can be obtained with different concentrations of NaOH solution. The uniform and ordered chains of PEG play a crucial role not only in the morphology, even more important in phase-transition of Bi2O3. The photoluminescence (PL) characteristic of the sample was investigated.
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Shanmugasundaram A, Basak P, Manorama SV, Krishna B, Sanyadanam S. Hierarchical mesoporous In2O3 with enhanced CO sensing and photocatalytic performance: distinct morphologies of In(OH)3 via self assembly coupled in situ solid-solid transformation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7679-89. [PMID: 25798883 DOI: 10.1021/acsami.5b00584] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The present investigation details our interesting findings and insights into the evolution of exotic hierarchical superstructures of In(OH)3 under solvothermal conditions. Controlled variation of reaction parameters such as, reactant concentration, solvent system, crystal structure modifiers, water content along with temperature and time, yielded remarkable architectures. Diverse morphologies achieved for the first time includes (i) raspberry-like hollow spheres, (ii) nanosheet-assembled spheres, (iii) nanoparticle-assembled spheres, (iv) nanocube-assembled hollow spheres, (v) yolk-like spheres, (vi) solid spheres, (vii) nanosheets/flakes, and (viii) ultrafine nanosheets. A plausible mechanism is proposed based on the evidence gathered from a comprehensive analysis aided by electron microscopy and X-ray diffraction studies. Key stages of morphological evolution could be discerned and rationally correlated with nucleation, growth, oriented attachment, and Ostwald ripening mediated by dissolution-redeposition mechanism coupled with solid evacuation. Remarkably phase-pure bcc-In2O3 with retention of precursor morphology could be realized postcalcination at 400 °C, which underlines the advantage of this strategy. Two typical hierarchical structures (raspberry-like hollow spheres and nanoparticles assembled spheres) were investigated for their gas sensing and photocatalytic performances to highlight the advantages offered by nanostructuring. An impressive sensor response, Smax ≈ 7340 and 4055, respectively for the two structures along with appreciably fast response/recovery times over a wide concentration range and as low as 1 ppm exhibits the superior sensitivity toward carbon monoxide (CO). When compared to commercial In2O3, estimated rate constant indicates ∼3-4 times enhancement in photocatalytic activity of the substrates toward Rhodamine-B.
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Affiliation(s)
- Arunkumar Shanmugasundaram
- †Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Andhra Pradesh, India
| | - Pratyay Basak
- †Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Andhra Pradesh, India
| | - Sunkara V Manorama
- †Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Andhra Pradesh, India
| | - Binoy Krishna
- ‡School of Physics, University of Hyderabad, Hyderabad-500046, Andhra Pradesh, India
| | - Srinath Sanyadanam
- ‡School of Physics, University of Hyderabad, Hyderabad-500046, Andhra Pradesh, India
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9
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Ye M, Zheng D, Wang M, Chen C, Liao W, Lin C, Lin Z. Hierarchically structured microspheres for high-efficiency rutile TiO(2)-based dye-sensitized solar cells. ACS APPLIED MATERIALS & INTERFACES 2014; 6:2893-901. [PMID: 24467178 DOI: 10.1021/am405442n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Peachlike rutile TiO2 microsphere films were successfully produced on transparent conducting fluorine-doped tin oxide substrate via a facile, one-pot chemical bath route at low temperature (T = 80-85 °C) by introducing polyethylene glycol (PEG) as steric dispersant. The formation of TiO2 microspheres composed of nanoneedles was attributed to the acidic medium for the growth of 1D needle-shaped building blocks where the steric interaction of PEG reduced the aggregation of TiO2 nanoneedles and the Ostwald ripening process. Dye-sensitized solar cells (DSSCs) assembled by employing these complex rutile TiO2 microspheres as photoanodes exhibited a light-to-electricity conversion efficiency of 2.55%. It was further improved to a considerably high efficiency of 5.25% upon a series of post-treatments (i.e., calcination, TiCl4 treatment, and O2 plasma exposure) as a direct consequence of the well-crystallized TiO2 for fast electron transport, the enhanced capacity of dye loading, the effective light scattering, and trapping from microstructures.
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Affiliation(s)
- Meidan Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
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10
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Yan M, Zou H, Zhao H, Song Y, Zheng K, Sheng Y, Wang G, Huo Q. Fabrication and photoluminescence properties of TiO2:Eu3+ microspheres with tunable structure from solid to core–shell. CrystEngComm 2014. [DOI: 10.1039/c4ce01048e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The structure of TiO2:Eu3+ microspheres can be tuned from solid to core–shell only by changing the amount of ethanol. In addition, the PL intensity of Eu3+ ions is related to the structure of the microspheres.
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Affiliation(s)
- Ming Yan
- Spine Center of the First Hospital of Jilin University
- Changchun 130021, PR China
| | - Haifeng Zou
- College of Chemistry
- Jilin University
- Changchun 130012, PR China
| | - Huan Zhao
- College of Chemistry
- Jilin University
- Changchun 130012, PR China
| | - Yanhua Song
- College of Chemistry
- Jilin University
- Changchun 130012, PR China
| | - Keyan Zheng
- College of Chemistry
- Jilin University
- Changchun 130012, PR China
| | - Ye Sheng
- College of Chemistry
- Jilin University
- Changchun 130012, PR China
| | - Guanjun Wang
- Spine Center of the First Hospital of Jilin University
- Changchun 130021, PR China
| | - Qisheng Huo
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012, PR China
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11
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He M, Yuan LX, Huang YH. Acetylene black incorporated three-dimensional porous SnS2 nanoflowers with high performance for lithium storage. RSC Adv 2013. [DOI: 10.1039/c2ra22764a] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Zhao J, Zou X, Zhou LJ, Feng LL, Jin PP, Liu YP, Li GD. Precursor-mediated synthesis and sensing properties of wurtzite ZnO microspheres composed of radially aligned porous nanorods. Dalton Trans 2013; 42:14357-60. [DOI: 10.1039/c3dt51754c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Mo M, Tang J, Zheng M, Lu Q, Chen Y, Guan H. Effect of the TiO2 shell thickness on the photocatalytic activity with ZnO/TiO2 core/shell nanorod microspheres. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0913-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Poly(tetrafluoroethylene) composite membranes coated with urchin-like polyaniline hiberarchy: Preparation and properties. J Colloid Interface Sci 2012; 385:211-7. [DOI: 10.1016/j.jcis.2012.07.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 06/28/2012] [Accepted: 07/03/2012] [Indexed: 11/17/2022]
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15
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Rao J, Yu A, Shao C, Zhou X. Construction of hollow and mesoporous ZnO microsphere: a facile synthesis and sensing property. ACS APPLIED MATERIALS & INTERFACES 2012; 4:5346-52. [PMID: 22970973 DOI: 10.1021/am3012966] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Mesoporous and hollow structure have been attracting increasing attention for their special properties and potential applications. Here we show a facile fabrication of hollow and mesoporous ZnO microsphere via a one-step wet chemical process using polyethylene glycol (PEG, MW 200) as the solvent and soft template. The morphology and structure of the products were characterized by using scanning electron microscopy and X-ray powder diffraction techniques. Thermal analysis and Fourier transform infrared spectroscopy techniques were also performed to show the properties of the precursor and annealed product. A possible growth mechanism of hollow and mesoporous ZnO microsphere was also proposed. The Brunauer-Emmett-Teller surface area of ZnO microsphere is 28.5 m(2)g(-1) and the size of mesopores is about 10 nm. The Photoluminescence spectra of the as-synthesized ZnO hollow microspheres were also presented. The mesoporous and hollow structure enhance the gas sensitivity of ZnO microsphere, and the obtained ZnO microspheres based sensor has an excellent performance for precision detection of ethanol and acetone with low concentration.
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Affiliation(s)
- Jun Rao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China
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16
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Chen M, Wang Y, Song L, Gunawan P, Zhong Z, She X, Su F. Urchin-like ZnO microspheres synthesized by thermal decomposition of hydrozincite as a copper catalyst promoter for the Rochow reaction. RSC Adv 2012. [DOI: 10.1039/c2ra01022d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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17
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Cui Y, Yu A, Pan H, Zhou X, Ding W. Catalytic outgrowth of SnO2 nanorods from ZnO–SnO2 nanoparticles microsphere core: combustion synthesis and gas-sensing properties. CrystEngComm 2012. [DOI: 10.1039/c2ce25810b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Zhu Q, Qian J, Pan H, Tu L, Zhou X. Synergistic manipulation of micro-nanostructures and composition: anatase/rutile mixed-phase TiO2 hollow micro-nanospheres with hierarchical mesopores for photovoltaic and photocatalytic applications. NANOTECHNOLOGY 2011; 22:395703. [PMID: 21891858 DOI: 10.1088/0957-4484/22/39/395703] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The construction of nanocrystals with controllable composition and desirable micro-nanostructures is a well-known challenge. A combination of favorable composition and optimized micro-nanostructures can enhance the performance of a material significantly. Using TiO(2) as an example, we demonstrate here a facile approach to prepare anatase/rutile mixed-phase TiO(2) hollow micro-nanospheres with hierarchical mesopores. Our strategy relies on polymer-assisted assembly of ∼ 5 nm nano-building blocks into three-dimensional hierarchical hollow micro-nanospheres in a mixed alcohol-water solution. This superior micro-nanostructure endows the sample with hierarchical mesopores and a high surface area of 106 m(2) g(-1). We also show that, due to the synergetic effects of the mixed-phase composition and the micro-nanostructures, the sample exhibited significantly improved photovoltaic performance and similar photocatalytic performance compared with the commercial Degussa P25. These results suggested that our sample has great potential for future photovoltaic and photocatalytic applications.
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Affiliation(s)
- Qing Zhu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, People's Republic of China
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19
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Zhu D, He Q, Chen Q, Fu Y, He C, Shi L, Meng X, Deng C, Cao H, Cheng J. Sensitivity gains in chemosensing by optical and structural modulation of ordered assembly arrays of ZnO nanorods. ACS NANO 2011; 5:4293-4299. [PMID: 21604766 DOI: 10.1021/nn103211d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nanomaterials and -structures have attracted much attention owing to their applications to ultrasensitive nanodevices. In this work, ordered assembly arrays of ZnO nanorods have been hydrothermally fabricated and used as optical substrates of fluorescence sensors for toxic vapors. The unique fastigiate nanorod assembly combines merits of single fibers and clusters, possessing identical orientation, large surface-to-volume ratio, evanescent transmission, and evanescent coupling. As coated on the assembly arrays, different sensing materials all generated amplified spontaneous emission (ASE) action such that the fluorescence intensity of the narrowed spectrum was 52.4-fold enhanced. Results of sensing experiments indicate that sensors based on the assembly arrays displayed 100% elevated normalized quenching rate and several times longer full-load time compared with reference sensors. This work provides a facile method to fabricate secondary structures of 1D rigid material and presents a new way to design highly sensitive optic sensors. Furthermore, evanescent excitation caused ASE action of fluorescent organics, and the correlative sensitivity gain is of interest in both theoretical research and the applications field.
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Affiliation(s)
- Defeng Zhu
- State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
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20
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Preparation of Nano BiOCl Microsphere and Its Fabrication Machanism. CHINESE JOURNAL OF CATALYSIS 2011. [DOI: 10.3724/sp.j.1088.2011.00738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Karakoti AS, Das S, Thevuthasan S, Seal S. PEGylierte anorganische Nanopartikel. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201002969] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Karakoti AS, Das S, Thevuthasan S, Seal S. PEGylated inorganic nanoparticles. Angew Chem Int Ed Engl 2011; 50:1980-94. [PMID: 21275011 DOI: 10.1002/anie.201002969] [Citation(s) in RCA: 345] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Revised: 08/16/2010] [Indexed: 12/23/2022]
Abstract
Application of inorganic nanoparticles in diagnosis and therapy has become a critical component in the targeted treatment of diseases. The surface modification of inorganic oxides is important for providing diversity in size, shape, solubility, long-term stability, and attachment of selective functional groups. This Minireview describes the role of polyethylene glycol (PEG) in the surface modification of oxides and focuses on their biomedical applications. Such a PEGylation of surfaces provides "stealth" characteristics to nanomaterials otherwise identified as foreign materials by human body. The role of PEG as structure-directing agent in synthesis of oxides is also presented.
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Affiliation(s)
- Ajay S Karakoti
- Environmental and Molecular Sciences Laboratory, PNNL, Richland, WA, USA
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23
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Wang WS, Zhen L, Xu CY, Shao WZ. Synthesis and formation process of SrSO4sisal-like hierarchical structures at room temperature. CrystEngComm 2011. [DOI: 10.1039/c0ce00062k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Liu S, Li C, Yu J, Xiang Q. Improved visible-light photocatalytic activity of porous carbon self-doped ZnO nanosheet-assembled flowers. CrystEngComm 2011. [DOI: 10.1039/c0ce00295j] [Citation(s) in RCA: 307] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Ma J, Liu Z, Lian J, Duan X, Kim T, Peng P, Liu X, Chen Q, Yao G, Zheng W. Ionic liquids-assisted synthesis and electrochemical properties of Bi2S3 nanostructures. CrystEngComm 2011. [DOI: 10.1039/c0ce00913j] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Zhu Z, Qu L, Niu Q, Zeng Y, Sun W, Huang X. Urchinlike MnO2 nanoparticles for the direct electrochemistry of hemoglobin with carbon ionic liquid electrode. Biosens Bioelectron 2010; 26:2119-24. [PMID: 20926275 DOI: 10.1016/j.bios.2010.09.017] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 09/01/2010] [Accepted: 09/06/2010] [Indexed: 11/18/2022]
Abstract
In this paper an urchinlike MnO(2) nanoparticle was synthesized by hydrothermal method and applied to the protein electrochemistry for the first time. By using a carbon ionic liquid electrode (CILE) as the basal electrode, hemoglobin (Hb) was immobilized on the surface of CILE with chitosan (CTS) and MnO(2) nanoparticle composite materials. Spectroscopic results indicated that Hb molecules retained its native structure in the composite film. A pair of well-defined redox peaks appeared on the cyclic voltammogram with the formal peak potential as -0.180 V (vs. SCE), which indicated that direct electron transfer of Hb was realized on the modified electrode. The result can be attributed to the specific characteristic of MnO(2) nanoparticle and the advantages of CILE, which facilitated the electron transfer rate. The fabricated CTS-MnO(2)-Hb/CILE showed good electrocatalytic ability to the reduction of trichloroacetic acid (TCA). Under the optimal conditions the catalytic current was in linear to TCA concentration in the range from 0.5 to 16.0 mmol L(-1) with the detection limit calculated as 0.167 mmol L(-1) (3σ). The result indicated that urchinlike MnO(2) nanoparticle had the potential application in the third generation electrochemical biosensors.
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Affiliation(s)
- Zhihong Zhu
- Institute of Nano-Science and Technology Center, Huazhong Normal University, Wuhan 430079, PR China
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27
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Wang J, Wang J, Wang Z, Zhang F. A Template-Free Method toward Urchin-Like Polyaniline Microspheres. Macromol Rapid Commun 2009; 30:604-8. [DOI: 10.1002/marc.200800726] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2008] [Revised: 01/04/2009] [Accepted: 01/07/2009] [Indexed: 11/11/2022]
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28
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Hydrothermal synthesis and characterizations of 2D and 3D 4ZnO·B2O3·H2O nano/microstructures with different morphologies. POWDER TECHNOL 2009. [DOI: 10.1016/j.powtec.2008.07.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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29
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Feldgitscher C, Peterlik H, Ivanovici S, Puchberger M, Kickelbick G. Crosslinked hybrid polymer matrices with nanostructure directing abilities for lanthanum hydroxide growth. Chem Commun (Camb) 2009:5564-6. [DOI: 10.1039/b909923a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Li L, Yan G, Wu J, Yu X, Guo Q, Ma Z, Huang Z. Preparation of polyaniline–palladium composite microflakes by one-step interface polymerization method. JOURNAL OF POLYMER RESEARCH 2008. [DOI: 10.1007/s10965-008-9244-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Wu M, Kuga S, Huang Y. Quasi-one-dimensional arrangement of silver nanoparticles templated by cellulose microfibrils. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10494-10497. [PMID: 18680325 DOI: 10.1021/la801602k] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We demonstrate a simple, facile approach to the deposition of silver nanoparticles on the surface of cellulose microfibrils with a quasi-one-dimensional arrangement. The process involves the generation of aldehyde groups by oxidizing the surface of cellulose microfibrils and then the assembly of silver nanoparticles on the surface by means of the silver mirror reaction. The linear nature of the microfibrils and the relatively uniform surface chemical modification result in a uniform linear distribution of silver particles along the microfibrils. The effects of various reaction parameters, such as the reaction time for the reduction process and employed starting materials, have been investigated by transmission electron microscopy (TEM) and ultraviolet-visible spectroscopy. Additionally, the products were examined for their electric current-voltage characteristics, the results showing that these materials had an electric conductivity of approximately 5 S/cm, being different from either the oxidated cellulose or bulk silver materials by many orders of magnitude.
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Affiliation(s)
- Min Wu
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, The Chinese Academy of Sciences, Zhongguancun North First Street 2, Beijing, China.
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32
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Bao H, Li CM, Cui X, Gan Y, Song Q, Guo J. Synthesis of a highly ordered single-crystalline Bi2S3 nanowire array and its metal/semiconductor/metal back-to-back Schottky diode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2008; 4:1125-1129. [PMID: 18651717 DOI: 10.1002/smll.200800007] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Haifeng Bao
- School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, 70 Nanyang Dr., Singapore 637457
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33
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Hydrothermal preparation of nanostructured MnO2 and morphological and crystalline evolution. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/s11458-008-0024-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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34
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Li L, Yang H, Qi G, Ma J, Xie X, Zhao H, Gao F. Synthesis and photoluminescence of hollow microspheres constructed with ZnO nanorods by H2 bubble templates. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.02.071] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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35
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Martins MA, Santos C, Almeida MM, Costa MEV. Hydroxyapatite micro- and nanoparticles: nucleation and growth mechanisms in the presence of citrate species. J Colloid Interface Sci 2007; 318:210-6. [PMID: 17996882 DOI: 10.1016/j.jcis.2007.10.008] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Revised: 10/04/2007] [Accepted: 10/04/2007] [Indexed: 11/25/2022]
Abstract
Hydroxyapatite (HAP) particles with different morphologies were precipitated from homogeneous calcium/citrate/phosphate solutions at physiological temperature. Small variations of the starting solution pH in the range 7.4<pH<8.5 made it possible to switch the precipitated particle morphology from a micrometric bundlelike to a nanometric needlelike shape. The role of the existing citrate species as calcium chelates is here discussed within the framework of particle nucleation and growth mechanisms. While temperature-dependent calcium citrate complex (Cacit) stability is here suggested to control the free calcium availability and thereby the nucleation rate, the adsorbed citrate species are proposed to control the nanoparticle stability. Moreover, an attempt to detail the role of citrate species in the ordered aggregation of HAP nuclei leading to the observed peanut and bundlelike microparticles morphology is also presented.
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Affiliation(s)
- Manuel A Martins
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
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36
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Wang J, Yang X, Hu W, Li B, Yan J, Hu J. Synthesis of AgBiS2 microspheres by a templating method and their catalytic polymerization of alkylsilanes. Chem Commun (Camb) 2007:4931-3. [DOI: 10.1039/b710832j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Abstract
Bi2S3 nanostructures with a sheaflike morphology are obtained via reaction of bismuth acetate-oleic acid complex with elemental sulfur in 1-octadecence. These structures may form by the splitting crystal growth mechanism, which is known to account for the morphology some mineral crystals assume in nature. By control of the synthetic parameters, different shapes are obtained, analogous to those which have been observed to occur by crystal splitting in minerals. These new and complex Bi2S3 nanostructures are characterized by transmission and scanning electron microscopy, and electron and X-ray diffraction.
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Affiliation(s)
- Jing Tang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720, USA
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38
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Zhou X, Zhang D, Zhu Y, Shen Y, Guo X, Ding W, Chen Y. Mechanistic Investigations of PEG-Directed Assembly of One-Dimensional ZnO Nanostructures. J Phys Chem B 2006; 110:25734-9. [PMID: 17181214 DOI: 10.1021/jp0643855] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mechanistic investigation on spherical assembly of the unique one-dimensional ZnO nanorods, solid nanocones, or hollow prisms with the closed -c end, directed by poly ethylene glycol (PEG) with different molecular weights, has been carried out using spectroscopic methods. The single crystalline ZnO nanoprisms, hollow along the c axis but closed at the -c end, aggregate to urchin-type globules in the microscale when PEG 2000 is used as directing reagent, while spherical aggregates of single crystalline ZnO nanocones are obtained under the direction of PEG 200. Studies reveal that both the PEG molecules aggregate to globules by interacting with zinc species in suitable solvents and englobe the zinc species. By the short time of ultrasonic pretreatment on the solution, a kind of flagellum structure is induced around the globules, in long tubular shapes for PEG 2000 but as shorter wedges for PEG 200. The globules with flagellums are templates for the assembly of the ZnO nanotubes or ZnO nanocones in the hydrothermal treatment. The tiny ZnO crystallites, produced in the hydrothermal process, stack to the templates and amalgamate to single crystalline nanotubes or nanocones, similar to the oriented attachment mechanism. The PEG 2000 template is included in the ZnO cavity of nanotubes, while PEG 200 is excluded from the ZnO nanocones due to the different intertwist properties between the two PEG molecules. Both the urchin-type assemblies, possessing the same external crystalline plane, compose a isotropic powder and emit very strong yellow light, centered at approximately 2.1 eV, under the excitation of the He-Cd laser at 325 nm, which has been correlated to the specific crystal plane. The special powders will be easily coated onto any type of surface for the decoration of a large area of surfaces for future applications.
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Affiliation(s)
- Xingfu Zhou
- Lab of Mesoscopic Chemistry, and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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39
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Zhang T, Dong W, Keeter-Brewer M, Konar S, Njabon RN, Tian ZR. Site-Specific Nucleation and Growth Kinetics in Hierarchical Nanosyntheses of Branched ZnO Crystallites. J Am Chem Soc 2006; 128:10960-8. [PMID: 16910693 DOI: 10.1021/ja0631596] [Citation(s) in RCA: 349] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here we report a site-specific sequential nucleation and growth route to the systematic building of hierarchical, complex, and oriented ZnO micro/nanostructures in solution nanosynthesis. Structures and morphologies of the products were confirmed by results from X-ray diffraction and scanning electron microscopy studies. The organic structure-directing agents (SDAs), diaminopropane and citrate, are found to play different roles in controlling the evolution of these new morphologies. Through the selective adsorptions of SDAs on different crystal facets of the primary ZnO rods, we have alternated the hierarchical growth of secondary and tertiary new complex nanostructures. Roles of the SDA concentration, nucleation time, and growth kinetics in the solution hierarchical ZnO nanosyntheses have all been systematically investigated.
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Affiliation(s)
- Tierui Zhang
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, USA
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40
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Wei Q, Li B, Li C, Wang J, Wang W, Yang X. PVP-capped silver nanoparticles as catalysts for polymerization of alkylsilanes to siloxane composite microspheres. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b608643h] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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