Cheng-Yong Su

Sun Yat-Sen University, Shengcheng, Guangdong, China

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Publications (269)1236.92 Total impact

  • Journal of Molecular Catalysis A Chemical 11/2014; 394:33–39. · 3.68 Impact Factor
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    ABSTRACT: The high-performance of a well-aligned 1D nanostructured electrode relies largely on a smart and rational modification with other active nanomaterials. Herein we present a facile solution-based route to fabricate a well-aligned metal oxides-based core-shell hybrid arrays on TCO substrate. Demonstrated samples included nanowire@nanoparticle (TNW@NP) or nanowire@nanosheet (TNW@NS) with a unique porous core/shell nanowires arrays architectures in the absence or presence of DETA during the solvothermal treatment process. The "alcoholysis" and "ripening" growth mechanism are proposed to explain the formation of honeycomb-like nanosheets shell on nanowires core. Based on careful control of experimental condition, a novel double layered TiO2 photoanode (DL-TNW@NS-YSHTSs) consisting of 16 um thick TNW@NS under layer and 6 um thick yolk-shell hierarchical TiO2 microspheres (YSHTSs) top layer can be obtained, exhibiting an impressive PCE over 10 % at 100 mW cm-2, which can be attributed to the well-organized photoanode composed of hierarchical core-shell arrays architecture and yolk-shell hollow spheres architecture with synergistic effects of high dye loading and superior light scattering for prominent light harvesting efficiency.
    ACS Applied Materials & Interfaces 10/2014; · 5.90 Impact Factor
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    Nano Energy 10/2014; 9:15–24. · 10.21 Impact Factor
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    ABSTRACT: A rare example is reported in which discrete Ag2 L 2 ring and (AgL)∞ chain motifs [L = N,N'-bis(3-imidazol-1-yl-propyl)-pyromellitic diimide] co-crystallize in the same crystal lattice with varying ratios and degrees of disorder. Crystal structures obtained from representative crystals reveal compatible packing arrangements of the cyclic and polymeric isomers within the crystal lattice, which enables them to co-exist within a crystalline solid solution. A feasible pathway for transformation between the isomers is suggested via facile rotation of the coordinating imidazolyl groups. This chemical system could provide a chance for direct observation of ring-opening isomerization at the crystal surface. Mass spectrometry and (1)H NMR titration show a dynamic equilibrium between cyclic and oligomeric species in solution, and a potential crystallization process is suggested involving alignment of precursors directed by aromatic stacking interactions between pyromellitic diimide units, followed by ring-opening isomerization at the interface between the solid and the solution. Both cyclic and oligomeric species can act as precursors, with interconversion between them being facile due to a low energy barrier for rotation of the imidazole rings. Thermogravimetric analysis and variable-temperature powder X-ray diffraction indicate a transition to a different crystalline phase around 120°C, which is associated with loss of solvent from the crystal lattice.
    IUCrJ. 09/2014; 1(Pt 5):318-27.
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    Nano Energy 09/2014; · 10.21 Impact Factor
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    ABSTRACT: Metal–organic skeleton based gel electrolytes are prepared for the first time for high efficiency quasi-solid-state DSSCs. The gel electrolytes feature in their sponge-like porous matrix of a metal–organic gel (MOG) assembled by coordination of Al3+ and 1,3,5-benzenetricarboxylate (H3BTC), which can provide an excellent ability to accommodate electrolyte ingredients, thus largely preserving the properties of the liquid electrolyte. Meanwhile, the MOG electrolyte can well penetrate into the photoanode film to ensure a good interfacial contact. The effects of the concentration of active species in the MOG electrolyte on the photoelectrical performances are investigated. On increasing the concentration, Jsc of gel-state cells improves gradually due to the enhanced I−/I3− redox couple content, while Voc undergoes an increase first but decreases subsequently. The synergistic function of cations (such as Al3+, Li+, etc.) and tert-butylpyridine (TBP), which can induce a conductive band (CB) shift of the TiO2 photoanode and affect the electron recombination, may contribute to the variation of Voc. By optimizing the composition of the gel electrolyte, a high conversion efficiency of over 8.60% can be obtained, which is a little lower than that of a liquid-state cell (9.13%). This research study will open up a new way to fabricate quasi-solid-state DSSCs with high efficiency.
    J. Mater. Chem. A. 08/2014; 2(37).
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    ABSTRACT: A novel dynamic covalent gel has been prepared via the imine bond formation reaction of tetraamine building blocks with luminescent tetraphenylethene tetraaldehyde units. The gel shows high hierarchical porosity (SBET = 512 m(2) g(-1)) and remarkable aggregation-induced emission enhancement, which has been demonstrated to be a selective sensor.
    Chemical Communications 08/2014; · 6.38 Impact Factor
  • Mei Pan, Cheng-Yong Su
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    ABSTRACT: The Borromean link constitutes an intriguing type of entanglement and knot in both discrete coordination architectures (Borromeate or Borromeand) and infinite coordination assemblies (Borromean networks), and is characteristic of nontrivial three-ring links which are inseparable as a whole while cleavage of any ring makes the whole fall apart. This highlight paper covers recent advances in the assembly of coordination supramolecular structures showing Borromean-linking topological character.
    CrystEngComm 08/2014; 16(34). · 3.86 Impact Factor
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    ABSTRACT: The present work establishes a facile process for one-step hydrothermal growth of vertically aligned anatase cactus-like branched TiO2 (CBT) arrays on a transparent conducting oxide (TCO) substrate. Various CBT morphologies are obtained by adjusting the potassium titanium oxide oxalate (PTO) reactant concentration (from 0.05 M to 0.15 M) and this yields a morphologically-controllable branched TiO2 arrays geometry. The CBT arrays consist of a vertically oriented nanowire (NW) or nanosheet (NS) stem and a host of short nanorod (NR) branches. The hierarchical CBT arrays demonstrate their excellent candidatures as photoanodes, which are capable of exhibiting high light-harvesting efficiency in dye-sensitized solar cells (DSSCs). Consequently, DSSCs based on 7 μm long optimized CBT arrays (0.05 M PTO), which are assembled with high density and high aspect-ratio NR branches, exhibit an impressive power conversion efficiency of 6.43% under AM 1.5G one sun illumination. The high performance can be attributed to the prominent light-harvesting efficiency, resulting from larger surface area and superior light-scattering capability.
    Journal of Power Sources 08/2014; 260:6–11. · 5.21 Impact Factor
  • Bing Hu, Cheng-Yong Su, Dieter Fenske, Olaf Fuhr
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    ABSTRACT: This paper describes a series of isolated binuclear copper(I) thiolato and selenolato complexes [Cu2(ER)2(dpppt)2]·(E = S or Se, R = org. group). Depending on the organic group of the bridging chalcogenolate these compounds can be luminescent or not. A very intensive bluish emission at 465 nm is found for the sulfur-bridged complex [Cu2(S–C6H4–OMe)2(dpppt)2].
    Inorganica Chimica Acta 08/2014; 419:118–123. · 2.04 Impact Factor
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    ABSTRACT: The development of more selective chelators for the washing of heavy metal contaminated soil is desirable in order to avoid excessive dissolution of soil minerals. Speciation and mobility of Cu, Zn, Pb, and Ni in a contaminated soil washed with phenyldiaminetetraacetic acid (PDTA), a derivative of EDTA, were investigated by batch leaching test using a range of soil washing conditions followed by sequential extraction. With appropriate washing conditions, PDTA significantly enhanced extraction of Cu from the contaminated soil. The primary mechanisms of Cu extraction by PDTA were complexation-promoted dissolution of soil Cu and increased dissolution of soil organic matter (SOM). PDTA showed high selectivity for Cu(II) over soil component cations (Ca(II), Mg(II), Fe(III), Mn(II), Al(III)), especially at lower liquid-to-soil ratios under PDTA deficiency, thus avoiding unwanted dissolution of soil minerals during the soil washing process which can degrade soil structure and interfere with future land use. PDTA-enhanced soil washing increased the exchangeable fractions of Cu, Zn, and Pb and decreased their residual fractions, compared to their levels in unwashed soil.
    Chemosphere 08/2014; 109:1–6. · 3.14 Impact Factor
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    ABSTRACT: Post-modification of supramolecular assemblies via covalent capture is an important strategy for the fabrication of functional materials. This paper describes the synthesis of supramolecular nanotubes with appended pyridyl groups based on N,N′,N′′-tris(3-methylpyridyl)trimesic amide (TMPTA), and their successful post-modification by 1,4-bis(bromomethyl)benzene. The original tubular morphology of the TMPTA nanotubes was found to stay intact following the modification process. The modified nanotubes are resistant to attack by strong acids and bases. The continuous network of covalent bonds throughout the tubular network is responsible for this stability. The formation of pyridinium cations upon modification results in positively charged surfaces of nanotubes that were found to be highly effective adsorbents for a range of anionic dyes, demonstrating both high adsorption capacity and selectivities over cationic and neutral dye species. These materials can be reused for dye capture without losses in their capture ability.
    New Journal of Chemistry 07/2014; 38(8). · 3.16 Impact Factor
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    ABSTRACT: Direct white-light emission was first achieved in a single phase material of a Dy(iii) metal-organic framework, which also shows tunable yellow-to-blue photoluminescence upon variation of excitation wavelengths.
    Chemical Communications 06/2014; · 6.72 Impact Factor
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    ABSTRACT: This review summarizes the use of metal-organic frameworks (MOFs) as a versatile supramolecular platform to develop heterogeneous catalysts for a variety of organic reactions, especially for liquid-phase reactions. Following a background introduction about catalytic relevance to various metal-organic materials, crystal engineering of MOFs, characterization and evaluation methods of MOF catalysis, we categorize catalytic MOFs based on the types of active sites, including coordinatively unsaturated metal sites (CUMs), metalloligands, functional organic sites (FOS), as well as metal nanoparticles (MNPs) embedded in the cavities. Throughout the review, we emphasize the incidental or deliberate formation of active sites, the stability, heterogeneity and shape/size selectivity for MOF catalysis. Finally, we briefly introduce their relevance into photo- and biomimetic catalysis, and compare MOFs with other typical porous solids such as zeolites and mesoporous silica with regard to their different attributes, and provide our view on future trends and developments in MOF-based catalysis.
    Chemical Society Reviews 05/2014; · 30.43 Impact Factor
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    ABSTRACT: The scrupulous design of nanoarchitectures and smart hybridization of specific active materials are closely related to the overall photovoltaic performance of an anode electrode. Here we present a solution-based strategy for the fabrication of well-aligned metal oxide-based nanowire-nanosheet-nanorod hyperbranched arrays on transparent conducting oxide substrates. For these hyperbranched arrays, we observe a twofold increment in dye adsorption and enhanced light trapping and scattering capability compared with the pristine titanium dioxide nanowires, and thus a power conversion efficiency of 9.09% is achieved. Our growth approach presents a strategy to broaden the photoresponse and maximize the light-harvesting efficiency of arrays architectures, and may lead to applications for energy conversion and storage, catalysis, water splitting and gas sensing.
    Nature Communications 05/2014; 5:3968. · 10.74 Impact Factor
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    ABSTRACT: Two new D–D–π–π–A type stable organic sensitizers, DT3 and DW3, were successfully synthesized for dye-sensitized solar cells (DSSCs). DT3 displayed η values of 10.03% and 8.05% in liquid and quasi-solid-state DSSCs, respectively, under standard global 1.5 solar conditions, offering an example achieving the highest efficiency to date in quasi-solid-state DSSCs based on pure organic dyes.
    J. Mater. Chem. A. 05/2014; 2(24).
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    ABSTRACT: An unprecedented attempt was conducted on suitably functionalized integration of three-dimensional hyperbranched titania architectures for efficient multi-stack photoanode, constructed via layer-by-layer assembly of hyperbranched hier-archical tree-like titania nanowires (under layer), branched hierarchical rambutan-like titania hollow submicrometer-sized spheres (intermediate layer) and hyperbranched hierarchical urchin-like titania micrometer-sized spheres (top layer). Owing to favorable charge-collection, superior light harvesting efficiency and extended electron lifetime, the multi-layered TiO2 based devices showed greater Jsc and Voc than those of conventional TiO2 nanoparticle (TNP) and an overall power conversion efficiency of 11.01% (Jsc =18.53 mA cm-2; Voc = 827 mV and FF = 0.72) was attained, which remarkably outperformed that of a TNP-based reference cell (η=7.62%) with a similar film thickness. Meanwhile, the facile and operable film-fabricating technique (hydrothermal and drop-casting) provides a promising scheme and great simplicity for high performance/cost ratio photovoltaic devices processability in a sustainable way.
    Journal of the American Chemical Society 04/2014; · 11.44 Impact Factor
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    ABSTRACT: Light-harvesting and charge collection have attracted increasing attention in the domain of photovoltaic cells, and can be facilitated dramatically by appropriate design of a photonic nanostructure. However, the applicability of current light-harvesting photoanode materials with single component and/or morphology (such as, particles, spheres, wires, sheets) is still limited by drawbacks such as insufficient electron-hole separation and/or light-trapping. Herein, we introduce a universal method to prepare hierarchical assembly of macroporous material-nanowire coated homogenous or heterogeneous metal oxide composite electrodes (TiO2 -TiO2 , SnO2 -TiO2 , and Zn2 SnO4 -TiO2 ; homogenous refers to a material in which the nanowire and the macroporous material have the same composition, i.e. both are TiO2 . Heterogeneous refers to a material in which the nanowires and the macroporous material have different compositions). The dye-sensitized solar cell based on a TiO2 -macroporous material-TiO2 -nanowire homogenous composition electrode shows an impressive conversion efficiency of 9.51 %, which is much higher than that of pure macroporous material-based photoelectrodes to date.
    Angewandte Chemie International Edition 03/2014; · 11.34 Impact Factor
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    ABSTRACT: A stepwise synthesis of nanosized Pd-Ru heteronuclear metal-organic cage from predesigned redox- and photo-active Ru(II)-metalloligand and naked Pd(II) ion is described. The resulting cage shows rhombododecahedral shape and contains 5350 Å3 cavity and 12 open windows, facilitating effective trapping of both polar and nonpolar guest molecules. Protection of photosensitive guests against UV radiation has been studied.
    Journal of the American Chemical Society 03/2014; · 11.44 Impact Factor
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    ABSTRACT: Organic–inorganic hybrid aerogels are receiving growing attention due to their high tuneability. In this contribution a novel type of organic–inorganic hybrid aerogels with high micro- and mesoporosity have been prepared successfully from a bridging bis(acetylacetonate) ligand, 3,4-diacetyl-2,5-dioxohexane, and trivalent metal ions (Al3+ and Cr3+). The metal-acetylacetonate aerogels compose of nanoscale metal-organic particles, which aggregate to form the gel matrix. N2 sorption shows that the aerogels have high BET surface areas up to ∼1100 m2 g−1 and hierarchical porosity. The porosity can be altered by introducing of second divalent metal ions into the aerogel. The aerogels show ability to adsorb various gases (H2, CO2 and CH4) and vapors (MeOH and EtOH). Water sorption measurements reveal that the aerogels have relatively hydrophobic pore surface.
    Microporous and Mesoporous Materials 03/2014; 187:108–113. · 3.21 Impact Factor

Publication Stats

3k Citations
1,236.92 Total Impact Points

Institutions

  • 2004–2014
    • Sun Yat-Sen University
      • • Department of Chemical Engineering
      • • State Key Laboratory of Optoelectronic Materials and Technologies
      • • Department of Chemistry
      Shengcheng, Guangdong, China
  • 2013
    • Freie Universität Berlin
      • Institute of Chemistry and Biochemistry
      Berlin, Land Berlin, Germany
  • 2012
    • Karlsruhe Institute of Technology
      • Institut für Nanotechnologie
      Eggenstein-Leopoldshafen, Baden-Wuerttemberg, Germany
  • 2008–2012
    • Universität Stuttgart
      • Institute of Inorganic Chemistry
      Stuttgart, Baden-Wuerttemberg, Germany
  • 1999–2012
    • Lanzhou University
      • State Key Laboratory of Applied and Organic Chemistry
      Kao-lan-hsien, Gansu Sheng, China
  • 2011
    • Tianjin Medical University
      • School of Pharmacy
      T’ien-ching-shih, Tianjin Shi, China
  • 1998–2010
    • Zhongshan University
      中山, Guangdong, China
  • 2009
    • Northeast Institute of Geography and Agroecology
      • State Key Laboratory of Structural Chemistry
      Beijing, Beijing Shi, China
  • 2003–2005
    • University of South Carolina
      • Chemistry and Biochemistry
      Columbia, SC, United States
    • Nagasaki University
      • Faculty of Education
      Nagasaki-shi, Nagasaki-ken, Japan
  • 2000–2001
    • The Chinese University of Hong Kong
      • Department of Chemistry
      Hong Kong, Hong Kong