Cheng-Yong Su

Sun Yat-Sen University, Shengcheng, Guangdong, China

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Publications (279)1294.22 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: The development of novel nanoarray photoanode with heterostructure on transparent conducting oxide (TCO) substrate provides a promising scheme to fabricate efficient energy conversion devices. Herein, we successfully synthesize the vertically aligned hierarchical TiO2 nanowire/ZnO nanorod or TiO2 nanowire/ZnO nanosheet hybrid arrays which are proved to be an excellent anode candidate for superior light utilization. Consequently, the quantum dot-sensitized solar cells (QDSSCs) based on such hybrid arrays exhibit an impressive power conversion efficiency (PCE) under AM 1.5G one sun illumination with improved short-circuit current density (JSC) and fill factor (FF) compared to pristine TiO2 nanowire arrays. Combined with the chemical bath deposited Cu2S counter electrode, the eventual PCE can be further optimized to as high as 4.57% for CdS/CdSe co-sensitized quantum dot solar cells.
    ACS Applied Materials & Interfaces 02/2015; · 5.90 Impact Factor
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    ABSTRACT: Reactions of Cu(II), Cd(II), and Ni(II) with a new tetradentate ligand N1,N3-bis(1-(1H-benzimidazol-2-yl)ethylidene)propane-1,3-diamine (H2bbepd) afforded four mononuclear pincer-like complexes of [Cu(H2bbepd)(ClO4)]·CH3OH·ClO4 (1), [Cd(H2bbepd)(CH3OH)(ClO4)]·CH3OH·ClO4 (2), [Ni(H2bbepd)(H2O)2]·2ClO4 (3), and [Ni(H2bbepd)(NO3)2] (4), respectively. The labile small coordinated components (anions or solvent molecules) on the apical coordination site of metal ions in complexes 1-4 display three different modes, which can be substituted by 4,4′-bipyridine (bpy) to obtain four new multinuclear complexes of [Cu2(H2bbepd)2(bpy)]2·4ClO4 (5), [Cd4(H2bbepd)4(bpy)3(ClO4)2]·6ClO4·(bpy)·2CH3OH·6H2O (6), {[Ni(H2bbepd)(bpy)]·2ClO4·CH3OH}n (7), and {[Ni (H2bbepd)(bpy)]·2NO3·CH3OH·H2O}n (8), respectively. Complex 5 is a binuclear dumbbell-like molecule, complex 6 is a rare example of discrete linear tetranuclear molecule, while complexes 7 and 8 are one-dimensional chains formed by an alternate arrangement of bpy molecules and mononuclear subunits. The differences in complexes 5-8 are largely dependent on the structure of the mononuclear precusors of complexes 1-4. All eight complexes are assembled into higher dimensional supramolecular frameworks by diverse nonconvalent interactions including unusual anion···π interactions between perchlorate and five-membered benzimidazole rings.
    Crystal Growth & Design 02/2015; 15(2):625-634. · 4.56 Impact Factor
  • Mei Pan, Cheng-Yong Su
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    ABSTRACT: Review: recent advances in the assembly of coordination supramolecular structures showng Borromean-linking topological character; 46 refs.
    ChemInform 02/2015; 46(8):no-no.
  • 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: An engineered and optimized trilayered TiO2 photoelectrode on Ti metal substrates with synergistic effects for dye-sensitized solar cells has been developed through the combination of one-dimensional (1D) TiO2 nanotubes, three-dimensional (3D) TiO2 hierarchical microsized spheres, as well as zero-dimensional (0D) nanoparticles with a large surface area. The advantages of efficient charge-collection, light-harvesting, as well as high dye-loading capability make it possible to achieve unprecedentedly high short-circuit photocurrent density (17.90 mA cm-2) under back-side illumination and thus allow us to obtain a power conversion efficiency as high as 9.10%.
    The Journal of Physical Chemistry C 07/2014; 118(30):16426-16432. · 4.84 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).

Publication Stats

5k Citations
1,294.22 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
    • Shanghai Research Institute of Chemical Industry
      Shanghai, Shanghai Shi, China
  • 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
    • Chinese Academy of Sciences
      • State Key Laboratory of Structural Chemistry
      Peping, Beijing, China
  • 2005
    • Shandong Normal University
      Chi-nan-shih, Shandong Sheng, 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