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Zhou R, Liu Y, Li M, Cao J, Cheng J, Wei D, Li B, Wang Y, Jia D, Jiang B, Valiev RZ, Zhou Y. Electrical Responsive Coating with a Multilayered TiO 2-SnO 2-RuO 2 Heterostructure on Ti for Controlling Antibacterial Ability and Improving Osseointegration. ACS APPLIED MATERIALS & INTERFACES 2024; 16:39064-39078. [PMID: 39028896 DOI: 10.1021/acsami.4c07114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2024]
Abstract
The bacterial infection and poor osseointegration of Ti implants could significantly compromise their applications in bone repair and replacement. Based on the carrier separation ability of the heterojunction and the redox reaction of pseudocapacitive metal oxides, we report an electrically responsive TiO2-SnO2-RuO2 coating with a multilayered heterostructure on a Ti implant. Owing to the band gap structure of the TiO2-SnO2-RuO2 coating, electron carriers are easily enriched at the coating surface, enabling a response to the endogenous electrical stimulation of the bone. With the formation of SnO2-RuO2 pseudocapacitance on the modified surface, the postcharging mode can significantly change the surface chemical state of the coating due to the redox reaction, enhancing the antibacterial ability and osteogenesis-related gene expression of the human bone marrow mesenchymal stem cells. Owing to the attraction for Ca2+, only the negatively postcharged SnO2@RuO2 can promote apatite deposition. The in vivo experiment reveals that the S-SnO2@RuO2-NP could effectively kill the bacteria colonized on the surface and promote osseointegration with the synostosis bonding interface. Thus, negatively charging the electrically responsive coating of TiO2-SnO2-RuO2 is a good strategy to endow modified Ti implants with excellent antibacterial ability and osseointegration.
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Affiliation(s)
- Rui Zhou
- School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, PR China
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yifei Liu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Ming Li
- Honghui Hospital, Xi'an Jiaotong University, Xi'an 710054, PR China
| | - Jianyun Cao
- Key Laboratory of LCR Materials and Devices of Yunnan Province, School of Materials and Energy, Yunnan University, Kunming 650500, PR China
| | - Jiahui Cheng
- The Second Affiliated Hospital of Xi'an Jiaotong University (Xibei Hospital), Xi'an 710004, PR China
| | - Daqing Wei
- Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, PR China
| | - Baoqiang Li
- Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, PR China
- Laboratory of Dynamics and Extreme Characteristics of Promising Nanostructured Materials, Saint Petersburg State University, Saint Petersburg 199034, Russia
| | - Yaming Wang
- Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, PR China
| | - Dechang Jia
- Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, PR China
| | - Bailing Jiang
- School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, PR China
| | - Ruslan Z Valiev
- Laboratory of Dynamics and Extreme Characteristics of Promising Nanostructured Materials, Saint Petersburg State University, Saint Petersburg 199034, Russia
- Institute of Physics of Advanced Materials, Ufa University of Science and Technology, Ufa 450076, Russia
| | - Yu Zhou
- Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, PR China
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Rothfuss ARM, Ayala JR, Handy JV, McGranahan CR, García-Pedraza KE, Banerjee S, Watson DF. Linker-Assisted Assembly of Ligand-Bridged CdS/MoS 2 Heterostructures: Tunable Light-Harvesting Properties and Ligand-Dependent Control of Charge-Transfer Dynamics and Photocatalytic Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2023; 15:39966-39979. [PMID: 37561966 DOI: 10.1021/acsami.3c06722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
We used linker-assisted assembly (LAA) to tether CdS quantum dots (QDs) to MoS2 nanosheets via L-cysteine (cys) or mercaptoalkanoic acids (MAAs) of varying lengths, yielding ligand-bridged CdS/MoS2 heterostructures for redox photocatalysis. LAA afforded precise control over the light-harvesting properties of QDs within heterostructures. Photoexcited CdS QDs transferred electrons to molecularly linked MoS2 nanosheets from both band-edge and trap states; the electron-transfer dynamics was tunable with the properties of bridging ligands. Rate constants of electron transfer, estimated from time-correlated single photon counting (TCSPC) measurements, ranged from (9.8 ± 3.8) × 106 s-1 for the extraction of electrons from trap states within heterostructures incorporating the longest MAAs to >5 × 109 s-1 for the extraction of electrons from band-edge or trap states in heterostructures with cys or 3-mercaptopropionic acid (3MPA) linkers. Ultrafast transient absorption measurements revealed that electrons were transferred within 0.5-2 ps or less for CdS-cys-MoS2 and CdS-3MPA-MoS2 heterostructures, corresponding to rate constants ≥5 × 109 s-1. Photoinduced CdS-to-MoS2 electron transfer could be exploited in photocatalytic hydrogen evolution reaction (HER) via the reduction of H+ to H2 in concert with the oxidation of lactic acid. CdS-L-MoS2-functionalized FTO electrodes promoted HER under oxidative conditions wherein H2 was evolved at a Pt counter electrode with Faradaic efficiencies of 90% or higher and under reductive conditions wherein H2 was evolved at the CdS-L-MoS2-heterostructure-functionalized working electrode with Faradaic efficiencies of 25-40%. Dispersed CdS-L-MoS2 heterostructures promoted photocatalytic HER (15.1 μmol h-1) under white-light illumination, whereas free cys-capped CdS QDs produced threefold less H2 and unfunctionalized MoS2 nanosheets produced no measurable H2. Charge separation across the CdS/MoS2 interface is thus pivotal for redox photocatalysis. Our results reveal that LAA affords tunability of the properties of constituent CdS QDs and MoS2 nanosheets and precise, programmable, ligand-dependent control over the assembly, interfacial structure, charge-transfer dynamics, and photocatalytic reactivity of CdS-L-MoS2 heterostructures.
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Affiliation(s)
- Arianna R M Rothfuss
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Jaime R Ayala
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3012, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3012, United States
| | - Joseph V Handy
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3012, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3012, United States
| | - Caitlin R McGranahan
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Karoline E García-Pedraza
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3012, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3012, United States
| | - David F Watson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
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McGranahan CR, Watson DF. Influence of donor-to-acceptor ratio on excited-state electron transfer within covalently tethered CdSe/CdTe quantum dot colloidal heterostructures. J Chem Phys 2022; 156:054706. [DOI: 10.1063/5.0078549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Caitlin R. McGranahan
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA
| | - David F. Watson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA
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4
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Wang C, Yang M, Wang X, Ma H, Tian Y, Pang H, Tan L, Gao K. Hierarchical CoS 2/MoS 2 flower-like heterostructured arrays derived from polyoxometalates for efficient electrocatalytic nitrogen reduction under ambient conditions. J Colloid Interface Sci 2021; 609:815-824. [PMID: 34839922 DOI: 10.1016/j.jcis.2021.11.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/12/2022]
Abstract
Electrochemical nitrogen reduction reaction (NRR) has been identified as a prospective alternative for sustainable ammonia production. Developing cost-effective and highly efficient electrocatalysts is critical for NRR under ambient conditions. Herein, the hierarchical cobalt-molybdenum bimetallic sulfide (CoS2/MoS2) flower-like heterostructure assembled from well-aligned nanosheets has been easily fabricated through a one-step strategy. The efficient synergy between different components and the formation of heterostructure in CoS2/MoS2 nanosheets with abundant active sites makes the non-noble metal catalyst CoS2/MoS2 highly effective in NRR, with a high NH3 yield rate (38.61 μg h-1 mgcat.-1), Faradaic efficiency (34.66%), high selectivity (no formation of hydrazine) and excellent long-term stability in 1.0 mol L-1 K2SO4 electrolyte (pH = 3.5) at -0.25 V versus the reversible hydrogen electrode (vs. RHE) under ambient conditions, exceeding much recently reported cobalt- and molybdenum-based materials, even catch up with some noble-metal-based catalyst. Density functional theory (DFT) calculation indicates that the formation of N2H* species on CoS2(200)/MoS2(002) is the rate-determining step via both the alternating and distal pathways with the maximum ΔG values (1.35 eV). These results open up opportunities for the development of efficient non-precious bimetal-based catalysts for NRR.
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Affiliation(s)
- Chenglong Wang
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, PR China.
| | - Mengle Yang
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, PR China
| | - Xinming Wang
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, PR China.
| | - Huiyuan Ma
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, PR China.
| | - Yu Tian
- Institute for Interdisciplinary Quantum Information Technology, Jilin Engineering Normal University, Changchun, 130052, Jilin, China.
| | - Haijun Pang
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, PR China
| | - Lichao Tan
- School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin, 150040, PR China
| | - Keqing Gao
- Beijing Caron Fiber Engineering Technology Research Center, Beijing Bluestar Technical Center, Beijing 101318, PR China
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Hoffman MP, Lee AY, Nagelj N, Lee YV, Olshansky JH. Mapping the effect of geometry on the radiative rate in core/shell QDs: core size dictates the conduction band offset. RSC Adv 2021; 11:35887-35892. [PMID: 35492800 PMCID: PMC9043225 DOI: 10.1039/d1ra07556j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 10/29/2021] [Indexed: 12/15/2022] Open
Abstract
Computational models have been developed that can accurately predict the electronic structure and thus optical properties of a variety of quantum dot (QD) materials. However, the application of these models to core/shell and other heterostructured QDs has received less experimental corroboration owing to the difficulty in systematically synthesizing and characterizing large ranges of geometries. In the current work, we synthesized a library of core/shell CdSe/CdS QDs with varying core sizes and shell thicknesses, and have characterized their radiative recombination rates. We find that the core size has only a modest effect on the radiative recombination rates, far less than is predicted by conventional effective mass models. In order to theoretically describe the experimental data, we performed an empirical modification of an effective mass model. We find that the conduction band offset between CdSe and CdS must be empirically altered based on QD core size in order to match our experimental data. This is hypothesized to be a result of reduced interfacial strain in core/shell QDs with smaller cores. The resultant relationship between conduction band offset and core size is used to create a predictive map of radiative lifetime as a function of core size and shell thickness. This map will be useful to researchers implementing CdSe/CdS core/shell QDs for a variety of applications since it can provide geometry specific excited state lifetimes. Predicting the radiative rate in CdSe/CdS core/shell quantum dots is made possible by using a core-size-dependent conduction band offset.![]()
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Affiliation(s)
| | - Autumn Y Lee
- Department of Chemistry, Amherst College Amherst MA 01002 USA
| | - Nejc Nagelj
- Department of Chemistry, Amherst College Amherst MA 01002 USA
| | - Youjin V Lee
- Department of Chemistry, University of California, Berkeley Berkeley CA USA
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McGranahan CR, Wolfe GE, Falca A, Watson DF. Excited-State Charge Transfer and Extended Charge Separation within Covalently Tethered Type-II CdSe/CdTe Quantum Dot Heterostructures: Colloidal and Multilayered Systems. ACS APPLIED MATERIALS & INTERFACES 2021; 13:30980-30991. [PMID: 34156237 DOI: 10.1021/acsami.1c05653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We used N,N'-dicyclohexylcarbodiimide (DCC) coupling chemistry to synthesize (1) heterostructures of CdSe and CdTe quantum dots (QDs) in colloidal dispersions and (2) heterostructures of CdSe and CdTe QDs, as well as CdS and CdSe QDs, immobilized on metal oxide thin films. The DCC-mediated formation of amide bonds between terminal carboxylic acid and amine groups of ligands on different QDs drove the formation of heterostructures. This cross-linking mechanism selectively yields heterostructures and prohibits the undesired formation of homostructures consisting of just one type of QD. Products of adsorption, ligand-exchange, and covalent-coupling reactions were characterized by transmission electron microscopy and ATR-FTIR, 1H NMR, electronic absorption, steady-state emission, and time-resolved emission spectroscopy. Ground-state absorption spectra of constituent QDs were unperturbed upon incorporation into heterostructures, enabling control over electronic properties. Heterostructures of CdSe and CdTe QDs exhibit type-II interfacial energetic offsets that promote charge separation following excitation of either QD. Indeed, photoexcited CdTe QDs transferred electrons to CdSe, and photoexcited CdSe QDs transferred holes to CdTe, on time scales of 10-100 ns, as evidenced by dynamic quenching of band-edge and trap-state emission. Mixed dispersions of noninteracting QDs did not undergo excited-state charge transfer. Constructing heterostructures on TiO2 thin films introduced an additional charge-transfer pathway, electron transfer from QDs to TiO2, which occurred on subnanosecond time scales and enabled extended spatial separation of photogenerated electrons and holes. Our results reveal that carbodiimide coupling chemistry can be used to tether colloidal QDs selectively and covalently to each other, yielding dispersed or immobilized heterostructures with programmable compositions and energetic offsets that can undergo efficient excited-state interfacial electron transfer.
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Affiliation(s)
- Caitlin R McGranahan
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Guy E Wolfe
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Alejandro Falca
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - David F Watson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
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Cho J, Suwandaratne NS, Razek S, Choi YH, Piper LFJ, Watson DF, Banerjee S. Elucidating the Mechanistic Origins of Photocatalytic Hydrogen Evolution Mediated by MoS 2/CdS Quantum-Dot Heterostructures. ACS APPLIED MATERIALS & INTERFACES 2020; 12:43728-43740. [PMID: 32866372 DOI: 10.1021/acsami.0c12583] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Solar fuel generation mediated by semiconductor heterostructures represents a promising strategy for sustainable energy conversion and storage. The design of semiconductor heterostructures for photocatalytic energy conversion requires the separation of photogenerated charge carriers in real space and their delivery to active catalytic sites at the appropriate overpotentials to initiate redox reactions. Operation of the desired sequence of light harvesting, charge separation, and charge transport events within heterostructures is governed by the thermodynamic energy offsets of the two components and their photoexcited charge-transfer reactivity, which determine the extent to which desirable processes can outcompete unproductive recombination channels. Here, we map energetic offsets and track the dynamics of electron transfer in MoS2/CdS architectures, prepared by interfacing two-dimensional MoS2 nanosheets with CdS quantum dots (QDs), and correlate the observed charge separation to photocatalytic activity in the hydrogen evolution reaction. The energetic offsets between MoS2 and CdS have been determined using hard and soft X-ray photoemission spectroscopy (XPS) in conjunction with density functional theory. A staggered type-II interface is observed, which facilitates electron and hole separation across the interface. Transient absorption spectroscopy measurements demonstrate ultrafast electron injection occurring within sub-5 ps from CdS QDs to MoS2, allowing for creation of a long-lived charge-separated state. The increase of electron concentration in MoS2 is evidenced with the aid of spectroelectrochemical measurements and by identifying the distinctive signatures of electron-phonon scattering in picosecond-resolution transient absorption spectra. Ultrafast charge separation across the type-II interface of MoS2/CdS heterostructures enables a high Faradaic efficiency of ∼99.4 ± 1.2% to be achieved in the hydrogen evolution reaction (HER) and provides a 40-fold increase in the photocatalytic activity of dispersed photocatalysts for H2 generation. The accurate mapping of thermodynamic driving forces and dynamics of charge transfer in these heterostructures suggests a means of engineering ultrafast electron transfer and effective charge separation to design viable photocatalytic architectures.
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Affiliation(s)
- Junsang Cho
- Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
- Department of Chemistry, Duksung Women's University, Seoul 01369, South Korea
| | - Nuwanthi S Suwandaratne
- Department of Chemistry, University at Buffalo The State University of New York, Buffalo, New York 14260-3000, United States
| | - Sara Razek
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - Yun-Hyuk Choi
- Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongsan, Gyeongbuk 38430, South Korea
| | - Louis F J Piper
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - David F Watson
- Department of Chemistry, University at Buffalo The State University of New York, Buffalo, New York 14260-3000, United States
| | - Sarbajit Banerjee
- Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
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9
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Hou J, Wang Z, Chen P, Chen V, Cheetham AK, Wang L. Intermarriage of Halide Perovskites and Metal‐Organic Framework Crystals. Angew Chem Int Ed Engl 2020; 59:19434-19449. [DOI: 10.1002/anie.202006956] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Jingwei Hou
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Zhiliang Wang
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Peng Chen
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Vicki Chen
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Anthony K. Cheetham
- Materials Research Laboratory University of California Santa Barbara CA 93106 USA
- Department of Materials Science and Engineering National University of Singapore Singapore 117576 Singapore
| | - Lianzhou Wang
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
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10
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Hou J, Wang Z, Chen P, Chen V, Cheetham AK, Wang L. Intermarriage of Halide Perovskites and Metal‐Organic Framework Crystals. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006956] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jingwei Hou
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Zhiliang Wang
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Peng Chen
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Vicki Chen
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
| | - Anthony K. Cheetham
- Materials Research Laboratory University of California Santa Barbara CA 93106 USA
- Department of Materials Science and Engineering National University of Singapore Singapore 117576 Singapore
| | - Lianzhou Wang
- School of Chemical Engineering University of Queensland St Lucia QLD 4072 Australia
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PbS Quantum Dots Decorating TiO 2 Nanocrystals: Synthesis, Topology, and Optical Properties of the Colloidal Hybrid Architecture. Molecules 2020; 25:molecules25122939. [PMID: 32604749 PMCID: PMC7356616 DOI: 10.3390/molecules25122939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/24/2020] [Accepted: 06/24/2020] [Indexed: 11/17/2022] Open
Abstract
Fabrication of heterostructures by merging two or more materials in a single object. The domains at the nanoscale represent a viable strategy to purposely address materials’ properties for applications in several fields such as catalysis, biomedicine, and energy conversion. In this case, solution-phase seeded growth and the hot-injection method are ingeniously combined to fabricate TiO2/PbS heterostructures. The interest in such hybrid nanostructures arises from their absorption properties that make them advantageous candidates as solar cell materials for more efficient solar light harvesting and improved light conversion. Due to the strong lattice mismatch between TiO2 and PbS, the yield of the hybrid structure and the control over its properties are challenging. In this study, a systematic investigation of the heterostructure synthesis as a function of the experimental conditions (such as seeds’ surface chemistry, reaction temperature, and precursor concentration), its topology, structural properties, and optical properties are carried out. The morphological and chemical characterizations confirm the formation of small dots of PbS by decorating the oleylamine surface capped TiO2 nanocrystals under temperature control. Remarkably, structural characterization points out that the formation of heterostructures is accompanied by modification of the crystallinity of the TiO2 domain, which is mainly ascribed to lattice distortion. This result is also confirmed by photoluminescence spectroscopy, which shows intense emission in the visible range. This originated from self-trapped excitons, defects, and trap emissive states.
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Du Y, Li W, Zurek E, Gao L, Cui X, Zhang M, Liu H, Tian Y, Zhang S, Zhang D. Predicted CsSi compound: a promising material for photovoltaic applications. Phys Chem Chem Phys 2020; 22:11578-11582. [PMID: 32400781 DOI: 10.1039/d0cp01440k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Exploration of photovoltaic materials has received enormous interest for a wide range of both fundamental and applied research. Therefore, in this work, we identify a CsSi compound with a Zintl phase as a promising candidate for photovoltaic material by using a global structure prediction method. Electronic structure calculations indicate that this phase possesses a quasi-direct band gap of 1.45 eV, suggesting that its optical properties could be superior to those of diamond-Si for capturing sunlight from the visible to the ultraviolet range. In addition, a novel silicon allotrope is obtained by removing Cs atoms from this CsSi compound. The superconducting critical temperature (Tc) of this phase was estimated to be of 9 K in terms of a substantial density of states at the Fermi level. Our findings represent a new promising CsSi material for photovoltaic applications, as well as a potential precursor of a superconducting silicon allotrope.
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Affiliation(s)
- Yonghui Du
- School of Materials Science and Engineering, Beihua University, Jilin 132013, China
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13
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Highly efficient charge transfer in CdS-covalent organic framework nanocomposites for stable photocatalytic hydrogen evolution under visible light. Sci Bull (Beijing) 2020; 65:113-122. [PMID: 36659074 DOI: 10.1016/j.scib.2019.10.015] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/06/2019] [Accepted: 10/07/2019] [Indexed: 01/21/2023]
Abstract
A facile and effective impregnation combined with photo-deposition approach was adopted to deposit cadmium sulfide (CdS) nanoparticles on CTF-1, a covalent triazine-based frameworks (CTFs). In this system, CTF-1 not only acted as supporter but also served as photocatalyst and electron donor. The performance of the obtained CdS deposited CTF-1 (CdS-CTF-1) nanocomposite was evaluated by H2 evolution reaction under visible light irradiation. As a result, CdS-CTF-1 exhibited high H2 production from water, far surpassing the CdS/CTF-1 nanocomposite, in which CdS was deposited via solvothermal method. The high activity of CdS-CTF-1 was attributed to the confined CdS nanoparticles with small size, leading to expose more active sites. In addition, time-resolved spectroscopy indicated that the superior performance of CdS-CTF-1 also can be ascribed to the fast electron transfer rate and injection efficiency (KET = 0.18 × 109 s-1, ηinj = 39.38%) between CdS and CTF-1 layers, which are 3.83 times faster and 4.84 times higher than that of CdS/CTF-1 nanocomposite. This work represents the first example on using covalent organic frameworks (COFs) as a support and electron-donor for fabricating novel CdS-COF nanocomposite system and its potential application in solar energy transformations.
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14
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Kraus S, Bonn M, Cánovas E. Room-temperature solution-phase epitaxial nucleation of PbS quantum dots on rutile TiO 2 (100). NANOSCALE ADVANCES 2020; 2:377-383. [PMID: 36134011 PMCID: PMC9417650 DOI: 10.1039/c9na00601j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/02/2019] [Indexed: 05/02/2023]
Abstract
Owing to its simplicity and versatility, the successive ionic layer adsorption and reaction (SILAR) method is increasingly being employed to develop low-cost hetero-nanostructured sensitized oxide systems for solar energy conversion, such as solar cells and solar fuels schemes. Understanding the nature of the SILAR quantum dot (QD) nucleation and growth on an insulating oxide is then critical as it will determine the QD density and spatial distribution, as well as the optoelectronic properties of the QD/oxide interfaces (e.g. QD bandgap onset). Here, we demonstrate epitaxial nucleation of lead sulfide (PbS) QDs onto a planar rutile titanium dioxide (100) surface employing the SILAR method. The QDs nucleated by SILAR are crystalline structures characterized by a truncated pyramidal shape, with nucleation occurring preferentially along the rutile (010) and (001) crystal orientations. The PbS QD size distribution is constrained by lattice mismatch causing strain in the lead sulfide. These results highlight the potential of SILAR for the facile growth of high-quality epitaxial nanostructures in liquid phase, under ambient conditions and at room temperature.
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Affiliation(s)
- Stefan Kraus
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Mischa Bonn
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
| | - Enrique Cánovas
- Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia) Faraday 9 28049 Madrid Spain
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15
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Metal Chalcogenides Based Heterojunctions and Novel Nanostructures for Photocatalytic Hydrogen Evolution. Catalysts 2020. [DOI: 10.3390/catal10010089] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The photo-conversion efficiency is a key issue in the development of new photocatalysts for solar light driven water splitting applications. In recent years, different engineering strategies have been proposed to improve the photogeneration and the lifetime of charge carriers in nanostructured photocatalysts. In particular, the rational design of heterojunctions composites to obtain peculiar physico-chemical properties has achieved more efficient charge carriers formation and separation in comparison to their individual component materials. In this review, the recent progress of sulfide-based heterojunctions and novel nanostructures such as core-shell structure, periodical structure, and hollow cylinders is summarized. Some new perspectives of opportunities and challenges in fabricating high-performance photocatalysts are also discussed.
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16
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Chauhan S, Sheng A, Cho J, Razek SA, Suwandaratne N, Sfeir MY, Piper LFJ, Banerjee S, Watson DF. Type-II heterostructures of α-V2O5 nanowires interfaced with cadmium chalcogenide quantum dots: Programmable energetic offsets, ultrafast charge transfer, and photocatalytic hydrogen evolution. J Chem Phys 2019; 151:224702. [DOI: 10.1063/1.5128148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Saurabh Chauhan
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA
| | - Aaron Sheng
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA
| | - Junsang Cho
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3255, USA
| | - Sara Abdel Razek
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, USA
| | - Nuwanthi Suwandaratne
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA
| | - Matthew Y. Sfeir
- Brookhaven National Laboratory, Center for Functional Nanomaterials, Upton, New York 11973, USA
| | - Louis F. J. Piper
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, USA
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3255, USA
| | - David F. Watson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA
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Kagkoura A, Hernandez‐Ferrer J, Benito AM, Maser WK, Tagmatarchis N. In‐Situ Growth and Immobilization of CdS Nanoparticles onto Functionalized MoS
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: Preparation, Characterization and Fabrication of Photoelectrochemical Cells. Chem Asian J 2019; 15:2350-2356. [DOI: 10.1002/asia.201901371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/15/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Antonia Kagkoura
- Theoretical and Physical Chemistry InstituteNational Hellenic Research Foundation 48 Vassileos Constantinou Avenue Athens 11635 Greece
| | | | - Ana M. Benito
- Instituto de Carboquimica (ICB-CSIC) C/Miguel Luesma Castan 4 50018 Zaragoza Spain
| | - Wolfgang K. Maser
- Instituto de Carboquimica (ICB-CSIC) C/Miguel Luesma Castan 4 50018 Zaragoza Spain
| | - Nikos Tagmatarchis
- Theoretical and Physical Chemistry InstituteNational Hellenic Research Foundation 48 Vassileos Constantinou Avenue Athens 11635 Greece
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18
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Chen J, Ma Q, Wu XJ, Li L, Liu J, Zhang H. Wet-Chemical Synthesis and Applications of Semiconductor Nanomaterial-Based Epitaxial Heterostructures. NANO-MICRO LETTERS 2019; 11:86. [PMID: 34138028 PMCID: PMC7770813 DOI: 10.1007/s40820-019-0317-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 09/29/2019] [Indexed: 05/19/2023]
Abstract
Semiconductor nanomaterial-based epitaxial heterostructures with precisely controlled compositions and morphologies are of great importance for various applications in optoelectronics, thermoelectrics, and catalysis. Until now, various kinds of epitaxial heterostructures have been constructed. In this minireview, we will first introduce the synthesis of semiconductor nanomaterial-based epitaxial heterostructures by wet-chemical methods. Various architectures based on different kinds of seeds or templates are illustrated, and their growth mechanisms are discussed in detail. Then, the applications of epitaxial heterostructures in optoelectronics, catalysis, and thermoelectrics are described. Finally, we provide some challenges and personal perspectives for the future research directions of semiconductor nanomaterial-based epitaxial heterostructures.
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Affiliation(s)
- Junze Chen
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Qinglang Ma
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xue-Jun Wu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, People's Republic of China
| | - Liuxiao Li
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jiawei Liu
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Hua Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, People's Republic of China.
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19
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Piskorz W, Zasada F, Wójtowicz G, Morawski A, Macyk W, Sojka Z. Attaching titania clusters of various size to reduced graphene oxide and its impact on the conceivable photocatalytic behavior of the junctions-a DFT/D + U and TD DFTB modeling. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:404001. [PMID: 31226702 DOI: 10.1088/1361-648x/ab2bc8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
DFT/D + U and density functional based tight binding (DFTB) molecular modeling was used to investigate the role of the structural, electronic and optical properties of reduced graphene oxide surface (r-GO), hybridized with hydrated TiO2 moieties of various size, ranging from small molecular Ti2O4 clusters into extended Ti43O86 rutile type nanocrystals of ~5 nm diameter. The calculated adhesion energies, varying from -5.048 eV (r-GO|Ti2O4), -12.159 eV (r-GO|Ti5O10), -18.499 eV (r-GO|Ti15O30) to -42.484 eV (r-GO|Ti43O86), indicate high stability of these composites. It was shown that electronic interactions at the r-GO|(1 1 0)TiO2 interface give rise to net charge flow from the r-GO substrate towards the TiO2 moieties, analyzed in terms of the partial charge density 3D plots and an interfacial dipole moment formation. The DOS structure of the composites was calculated by means of the time dependent DFTB approach, and the position and composition of the VB and CB edges, along with the presence of weak mid-gap 2p C states originating from the intact graphene-like patches in the r-GO substrate were discussed in detail in the context of conceivable photocatalytic activity of the composites. The constructed band alignment diagram implies formation of the staggered type II scheme, with the electric field offset that is sensitive to the titania cluster size. In the case of the nano-reticular TiO2, where only a fraction of the Ti atoms is engaged in the Ti-O-C linkers formation, recombination of the photogenerated charges is inhibited owing to favorable spatial separation effect. For small molecular TiO2 clusters with all Ti cations anchored to the r-GO layer fast cross-relaxation quenches the beneficial interfacial charge separation effect, since the strong hybridization of the oxygen and carbon states provides a convenient pathway for the efficient electronic coupling between the CB edge states of r-GO and the VB edge states of the TiO2 moieties. A phenomenological model of the molecular r-GO|Ti2O4 and the reticular r-GO|Ti43O86 composites was constructed in account for different photocatalytic behavior of both junctions.
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Affiliation(s)
- Witold Piskorz
- Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
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20
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Wu HL, Li XB, Tung CH, Wu LZ. Semiconductor Quantum Dots: An Emerging Candidate for CO 2 Photoreduction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1900709. [PMID: 31271262 DOI: 10.1002/adma.201900709] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 05/04/2019] [Indexed: 05/24/2023]
Abstract
As one of the most critical approaches to resolve the energy crisis and environmental concerns, carbon dioxide (CO2 ) photoreduction into value-added chemicals and solar fuels (for example, CO, HCOOH, CH3 OH, CH4 ) has attracted more and more attention. In nature, photosynthetic organisms effectively convert CO2 and H2 O to carbohydrates and oxygen (O2 ) using sunlight, which has inspired the development of low-cost, stable, and effective artificial photocatalysts for CO2 photoreduction. Due to their low cost, facile synthesis, excellent light harvesting, multiple exciton generation, feasible charge-carrier regulation, and abundant surface sites, semiconductor quantum dots (QDs) have recently been identified as one of the most promising materials for establishing highly efficient artificial photosystems. Recent advances in CO2 photoreduction using semiconductor QDs are highlighted. First, the unique photophysical and structural properties of semiconductor QDs, which enable their versatile applications in solar energy conversion, are analyzed. Recent applications of QDs in photocatalytic CO2 reduction are then introduced in three categories: binary II-VI semiconductor QDs (e.g., CdSe, CdS, and ZnSe), ternary I-III-VI semiconductor QDs (e.g., CuInS2 and CuAlS2 ), and perovskite-type QDs (e.g., CsPbBr3 , CH3 NH3 PbBr3 , and Cs2 AgBiBr6 ). Finally, the challenges and prospects in solar CO2 reduction with QDs in the future are discussed.
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Affiliation(s)
- Hao-Lin Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xu-Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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21
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TiO 2 and Au-TiO 2 Nanomaterials for Rapid Photocatalytic Degradation of Antibiotic Residues in Aquaculture Wastewater. MATERIALS 2019; 12:ma12152434. [PMID: 31370138 PMCID: PMC6695739 DOI: 10.3390/ma12152434] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/26/2019] [Accepted: 07/27/2019] [Indexed: 11/17/2022]
Abstract
Antibiotic residues in aquaculture wastewater are considered as an emerging environmental problem, as they are not efficiently removed in wastewater treatment plants. To address this issue, we fabricated TiO2 nanotube arrays (TNAs), TiO2 nanowires on nanotube arrays (TNWs/TNAs), Au nanoparticle (NP)-decorated-TNAs, and TNWs/TNAs, which were applied for assessing the photocatalytic degradation of eight antibiotics, simultaneously. The TNAs and TNWs/TNAs were synthesized by anodization using an aqueous NH4F/ethylene glycol solution. Au NPs were synthesized by chemical reduction method, and used to decorate on TNAs and TNWs/TNAs. All the TiO2 nanostructures exhibited anatase phase and well-defined morphology. The photocatalytic performance of TNAs, TNWs/TNAs, Au-TNAs and Au-TNWs/TNAs was studied by monitoring the degradation of amoxicillin, ampicillin, doxycycline, oxytetracycline, lincomycin, vancomycin, sulfamethazine, and sulfamethoxazole under ultraviolet (UV)-visible (VIS), or VIS illumination by LC-MS/MS method. All the four kinds of nanomaterials degraded the antibiotics effectively and rapidly, in which most antibiotics were removed completely after 20 min treatment. The Au-TNWs/TNAs exhibited the highest photocatalytic activity in degradation of the eight antibiotics. For example, reaction rate constants of Au-TNWs/TNAs for degradation of lincomycin reached 0.26 min−1 and 0.096 min−1 under UV-VIS and VIS irradiation, respectively; and they were even higher for the other antibiotics. The excellent photocatalytic activity of Au-TNWs/TNAs was attributed to the synergistic effects of: (1) The larger surface area of TNWs/TNAs as compared to TNAs, and (2) surface plasmonic effect in Au NPs to enhance the visible light harvesting.
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22
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Gharieh A, Khoee S, Mahdavian AR. Emulsion and miniemulsion techniques in preparation of polymer nanoparticles with versatile characteristics. Adv Colloid Interface Sci 2019; 269:152-186. [PMID: 31082544 DOI: 10.1016/j.cis.2019.04.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 04/13/2019] [Accepted: 04/24/2019] [Indexed: 11/29/2022]
Abstract
In recent years, polymer nanoparticles (PNPs) have found their ways into numerous applications extending from electronics to photonics, conducting materials to sensors and medicine to biotechnology. Physical properties and surface morphology of PNPs are the most important parameters that significantly affect on their exploitations and can be controlled through the synthesis process. Emulsion and miniemulsion techniques are among the most efficient and wide-spread methods for preparation of PNPs. The objective of this review is to present and highlight the recent developments in the advanced PNPs with specific properties that are produced through emulsion and miniemulsion processes.
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Affiliation(s)
- Ali Gharieh
- Polymer Science Department, Iran Polymer & Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
| | - Sepideh Khoee
- Polymer Laboratory, School of Chemistry, College of Science, University of Tehran, PO Box 14155 6455, Tehran, Iran
| | - Ali Reza Mahdavian
- Polymer Science Department, Iran Polymer & Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran.
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23
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Cho J, Sheng A, Suwandaratne N, Wangoh L, Andrews JL, Zhang P, Piper LFJ, Watson DF, Banerjee S. The Middle Road Less Taken: Electronic-Structure-Inspired Design of Hybrid Photocatalytic Platforms for Solar Fuel Generation. Acc Chem Res 2019; 52:645-655. [PMID: 30543407 DOI: 10.1021/acs.accounts.8b00378] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The development of efficient solar energy conversion to augment other renewable energy approaches is one of the grand challenges of our time. Water splitting, or the disproportionation of H2O into energy-dense fuels, H2 and O2, is undoubtedly a promising strategy. Solar water splitting involves the concerted transfer of four electrons and four protons, which requires the synergistic operation of solar light harvesting, charge separation, mass and charge transport, and redox catalysis processes. It is unlikely that individual materials can mediate the entire sequence of charge and mass transport as well as energy conversion processes necessary for photocatalytic water splitting. An alternative approach, emulating the functioning of photosynthetic systems, involves the utilization of hybrid systems wherein different components perform the various functions required for solar water splitting. The design of such hybrid systems requires the multiple components to operate in lockstep with optimal thermodynamic driving forces and interfacial charge transfer kinetics. This Account describes a new class of nanoscale heterostructures comprising M xV2O5 nanowires, where M is a p-block cation with a ( n - 1) d10 ns2 np0 electronic configuration characterized by a stereoactive lone pair of electrons and x is its stoichiometry, interfaced with II-VI semiconductor quantum dots (QDs). Photocatalytic water splitting involves the transfer of excited-state holes from QDs to mid-gap states (derived from the stereoactive lone pairs of p-block cations) of nanowires, hole transport through nanowires, the reduction of protons at a QD-immobilized catalyst, and water oxidation at an anode. The M xV2O5/QD architectures provide a vast design space for evolutionary optimization of function with considerable tunability of composition and structure of the individual components as well as of the interfacial structure, thereby facilitating programmability of absorption spectra, energetic offsets, and charge-transfer reactivity. The available design space spans choice of the p-block cation M, its stoichiometry x, the composition and size of various QDs, and the nature of the nanowire/QD interface. This multivariate parameter space has been navigated by integrating first-principles modeling, diversified synthesis, spectroscopic measurements, and catalytic evaluation to facilitate the rational design of several generations of heterostructures and the systematic improvement of their photocatalytic performance. The electronic structures of the target heterostructures are predicted by DFT calculations in light of the revised lone pair model of stereoactive structural distortions and evaluated by hard X-ray photoelectron spectroscopy such as to systematically tune the interfacial band offsets. Central to this approach is the development of a topochemical "etch-a-sketch" intercalation approach that allows for facile installation of p-block cations in metastable polymorphs of V2O5. The interfacial charge transfer kinetics of M xV2O5/QD heterostructures is further evaluated by transient absorption spectroscopy to measure excited-state charge-transfer dynamics and is found to depend sensitively on interfacial structure and the thermodynamic driving forces in accordance with Marcus theory. The integration of theory and experiment has allowed for the design of viable photocatalytic architectures exemplified by the exceptional catalytic performance of β-Pb xV2O5/CdX (X= S, Se) architectures, which has subsequently been elaborated to other lone-pair M xV2O5 compounds, demonstrating the effective exploitation of the opportunities for programmability available in the design space.
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Affiliation(s)
- Junsang Cho
- Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Aaron Sheng
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Nuwanthi Suwandaratne
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Linda Wangoh
- Department of Physics, Applied Physics, and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - Justin L. Andrews
- Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Peihong Zhang
- Department of Physics, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Louis F. J. Piper
- Department of Physics, Applied Physics, and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - David F. Watson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Sarbajit Banerjee
- Departments of Chemistry and Materials Science and Engineering, Texas A&M University, College Station, Texas 77842-3012, United States
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Sheng X, Xu T, Feng X. Rational Design of Photoelectrodes with Rapid Charge Transport for Photoelectrochemical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805132. [PMID: 30637813 DOI: 10.1002/adma.201805132] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/23/2018] [Indexed: 06/09/2023]
Abstract
Photoelectrode materials are the heart of photoelectrochemical (PEC) cells, which hold great promise to address global energy and environmental issues by converting solar energy into electricity or chemical fuels. In recent decades, significant research efforts have been devoted to the design and construction of photoelectrodes for the efficient generation and utilization of charge carriers to boost PEC performance. Herein, insights from a literature study on the relationship between the architecture and charge dynamics of photoelectrodes are presented. After briefly introducing the fundamental theories of charge dynamics in nanostructured photoelectrodes, the development of photoelectrode design in 1D polycrystalline nanotube arrays, 1D single-crystalline nanowire arrays, and hierarchical and mesoporous nanowire arrays is reviewed with a focus on the interplay between architecture and charge transport properties. For each design, commonly used synthetic approaches and the corresponding charge transport properties are discussed. Subsequently, the applications of these photoelectrodes in PEC systems are summarized. In conclusion, future challenges in the rational design of photoelectrode architecture are presented. The basic relationships between the architectures and charge dynamics of photoelectrode materials discussed here are expected to provide pertinent guidance and a reference for future advanced material design targeting improved light energy conversion systems.
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Affiliation(s)
- Xia Sheng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Tao Xu
- Department of Chemistry and Biochemistry, Northern Illinois University, Dekalb, IL, 60115, USA
| | - Xinjian Feng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
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25
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Kayal S, Mandal A, Pramanik P, Halder M. Hypothesizing the applicability of the principle of linear combination in predicting sensing behaviors of quantum dots: A deeper understanding of the precise tuning of quantum dot properties with capping composition. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Moroz P, Royo Romero L, Zamkov M. Colloidal semiconductor nanocrystals in energy transfer reactions. Chem Commun (Camb) 2019; 55:3033-3048. [DOI: 10.1039/c9cc00162j] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Excitonic energy transfer is a versatile mechanism by which colloidal semiconductor nanocrystals can interact with a variety of nanoscale species. This feature article will discuss the latest research on the key scenarios under which semiconductor nanocrystals can engage in energy transfer with other nanoparticles, organic fluorophores, and plasmonic nanostructures, highlighting potential technological benefits to be gained from such processes.
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Affiliation(s)
- Pavel Moroz
- Department of Physics and Astronomy
- Bowling Green State University
- Bowling Green
- USA
- The Center for Photochemical Sciences
| | - Luis Royo Romero
- Department of Physics and Astronomy
- Bowling Green State University
- Bowling Green
- USA
| | - Mikhail Zamkov
- Department of Physics and Astronomy
- Bowling Green State University
- Bowling Green
- USA
- The Center for Photochemical Sciences
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27
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Das S, Dutta A, Bera R, Patra A. Ultrafast carrier dynamics in 2D-2D hybrid structures of functionalized GO and CdSe nanoplatelets. Phys Chem Chem Phys 2019; 21:15568-15575. [PMID: 31265037 DOI: 10.1039/c9cp02823d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Considerable attention has been paid to designing graphene based 2D hybrid nanostructures for their potential applications in various areas from healthcare to energy harvesting. Herein, we have prepared 2D-2D hybrid structures of 2D CdSe nanoplatelets (NPLs) with thiol (-SH) functionalized reduced graphene oxide (G-Ph-SH). Microscopic and spectroscopic studies reveal that the G-Ph-SH surface is successfully decorated by CdSe NPLs through a thiophenol (-SH) linker. The significant photoluminescence quenching (65%) and the shortening of decay time from 1 ns to 0.4 ns of CdSe NPLs are observed after adding 100 μg of G-Ph-SH. Furthermore, the femto-second transient absorption spectroscopic (fs-TAS) study reveals that the growth time of CdSe NPLs in the composite is reduced to 0.4 ps from 0.8 ps due to faster hot electron cooling. A faster component of 1.4 ps in the kinetic parameters of the composite system further suggests that the ultrafast electron transfer occurs from the conduction band of CdSe NPLs to surface functionalized reduced graphene oxide. This type of 2D-2D hybrid structure may open up new possibilities in light harvesting applications.
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Affiliation(s)
- Soma Das
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Avisek Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Rajesh Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Amitava Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
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28
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Andrews JL, Cho J, Wangoh L, Suwandaratne N, Sheng A, Chauhan S, Nieto K, Mohr A, Kadassery KJ, Popeil MR, Thakur PK, Sfeir M, Lacy DC, Lee TL, Zhang P, Watson DF, Piper LFJ, Banerjee S. Hole Extraction by Design in Photocatalytic Architectures Interfacing CdSe Quantum Dots with Topochemically Stabilized Tin Vanadium Oxide. J Am Chem Soc 2018; 140:17163-17174. [DOI: 10.1021/jacs.8b09924] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Justin L. Andrews
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Junsang Cho
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Linda Wangoh
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - Nuwanthi Suwandaratne
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Aaron Sheng
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Saurabh Chauhan
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Kelly Nieto
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Alec Mohr
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Karthika J. Kadassery
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Melissa R. Popeil
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - Pardeep K. Thakur
- Diamond Light Source Ltd., Diamond House, Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K
| | - Matthew Sfeir
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - David C. Lacy
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Tien-Lin Lee
- Diamond Light Source Ltd., Diamond House, Harwell Science and Innovation Campus, Didcot OX11 0DE, U.K
| | - Peihong Zhang
- Department of Physics, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - David F. Watson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Louis F. J. Piper
- Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York 13902, United States
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843-3255, United States
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Sun JK, Zhang L, Yue L, Tang T, Jiang WJ, Zhang Y, Pan Z, Zhong X, Hu JS, Wan LJ. Self-supported metal sulphide nanocrystals-assembled nanosheets on carbon paper as efficient counter electrodes for quantum-dot-sensitized solar cells. Sci China Chem 2018. [DOI: 10.1007/s11426-018-9279-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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30
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Ortiz PD, Castillo-Rodriguez J, Zarate X, Martin-Trasanco R, Benito M, Mata I, Molins E, Schott E. Synthesis of Au Nanoparticles Assisted by Linker-Modified TiO 2 Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9402-9409. [PMID: 30021439 DOI: 10.1021/acs.langmuir.7b04195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasmonic nanoparticles, especially gold ones, have been widely employed as photosensitizers in photoelectrovoltaic or photocatalytic systems. To improve the system's performance, a greater interaction of the nanoparticles with the semiconductor, generally TiO2, is desired. Moreover, this performance is enhanced when an efficient covering of TiO2 surface by the sensitizer is achieved. The Brust-Schiffrin-like methods are of the most employed approaches for nanoparticles synthesis. In a traditional approach, the reduction of the gold precursor is performed in the presence of a stabilizer (typically a thiol molecule) free in solution. A second step in which the obtained nanoparticles are anchored to the semiconductor surface is necessary in the case of photosensitive applications. Drawbacks like steric hindrance turn more difficult the covering of the semiconductor's surface by nanoparticles. In this paper, we report a variation of this methodology, where the linker is previously anchored to the TiO2 nanoparticles surface. The resulting system is employed as the stabilizer in the gold reduction step. This strategy is carried out in aqueous media in two simple steps. A great covering of the titania surface by gold nanoparticles is achieved in all cases and the gold nanoparticles in the resulting nanoaggregate might be useful for photoelectrovoltaic or photocatalytic applications.
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Affiliation(s)
- Pedro D Ortiz
- Departamento de Química Inorgánica, Facultad de Química , Pontificia Universidad Católica de Chile , Avenida Vicuña Mackenna, 4860 , Santiago 7820436 , Chile
| | - Judith Castillo-Rodriguez
- Departamento de Química Inorgánica, Facultad de Química , Pontificia Universidad Católica de Chile , Avenida Vicuña Mackenna, 4860 , Santiago 7820436 , Chile
| | - Ximena Zarate
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería , Universidad Autónoma de Chile , Av. Pedro de Valdivia 425 , Santiago 7500912 , Chile
| | - Rudy Martin-Trasanco
- Centro de Nanociencias Aplicadas , Universidad Andres Bello , Santiago 8370146 , Chile
| | - Mónica Benito
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB Bellaterra, Barcelona 0813 , España
| | - Ignasi Mata
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB Bellaterra, Barcelona 0813 , España
| | - Elies Molins
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Campus UAB Bellaterra, Barcelona 0813 , España
| | - Eduardo Schott
- Departamento de Química Inorgánica, Facultad de Química , Pontificia Universidad Católica de Chile , Avenida Vicuña Mackenna, 4860 , Santiago 7820436 , Chile
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31
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Chandra M, Bhunia K, Pradhan D. Controlled Synthesis of CuS/TiO 2 Heterostructured Nanocomposites for Enhanced Photocatalytic Hydrogen Generation through Water Splitting. Inorg Chem 2018; 57:4524-4533. [PMID: 29620355 DOI: 10.1021/acs.inorgchem.8b00283] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Photocatalytic hydrogen (H2) generation through water splitting has attracted substantial attention as a clean and renewable energy generation process that has enormous potential in converting solar-to-chemical energy using suitable photocatalysts. The major bottleneck in the development of semiconductor-based photocatalysts lies in poor light absorption and fast recombination of photogenerated electron-hole pairs. Herein we report the synthesis of CuS/TiO2 heterostructured nanocomposites with varied TiO2 contents via simple hydrothermal and solution-based process. The morphology, crystal structure, composition, and optical properties of the as-synthesized CuS/TiO2 hybrids are evaluated in detail. Controlling the CuS/TiO2 ratio to an optimum value leads to the highest photocatalytic H2 production rate of 1262 μmol h-1 g-1, which is 9.7 and 9.3 times higher than that of pristine TiO2 nanospindles and CuS nanoflakes under irradiation, respectively. The enhancement in the H2 evolution rate is attributed to increased light absorption and efficient charge separation with an optimum CuS coverage on TiO2. The photoluminescence and photoelectrochemical measurements further confirm the efficient separation of charge carriers in the CuS/TiO2 hybrid. The mechanism and synergistic role of CuS and TiO2 semiconductors for enhanced photoactivity is further delineated.
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Affiliation(s)
- Moumita Chandra
- Materials Science Centre , Indian Institute of Technology , Kharagpur , 721302 West Bengal , India
| | - Kousik Bhunia
- Materials Science Centre , Indian Institute of Technology , Kharagpur , 721302 West Bengal , India
| | - Debabrata Pradhan
- Materials Science Centre , Indian Institute of Technology , Kharagpur , 721302 West Bengal , India
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32
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33
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Subila K, Sandeep K, Thomas EM, Ghatak J, Shivaprasad SM, Thomas KG. CdSe-CdTe Heterojunction Nanorods: Role of CdTe Segment in Modulating the Charge Transfer Processes. ACS OMEGA 2017; 2:5150-5158. [PMID: 31457790 PMCID: PMC6641699 DOI: 10.1021/acsomega.7b00995] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 08/08/2017] [Indexed: 06/10/2023]
Abstract
Heterojunction nanorods having dissimilar semiconductors possess charge transfer (CT) properties and are proposed as active elements in optoelectronic systems. Herein, we describe the synthetic methodologies for controlling the charge carrier recombination dynamics in CdSe-CdTe heterojunction nanorods through the precise growth of CdTe segment from one of the tips of CdSe nanorods. The location of heterojunction was established through a point-by-point collection of the energy-dispersive X-ray spectra using scanning transmission electron microscopy. The possibilities of the growth of CdTe from both the tips of CdSe nanorods and the overcoating of CdTe over CdSe segment were also ruled out. The CT emission in the heterojunction nanorods originates through an interfacial excitonic recombination and was further tuned to the near-infrared region by varying the two parameters: the aspect ratio of CdSe and the length of CdTe segment. These aspects are evidenced from the emission lifetime and the femtosecond transient absorption studies.
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Affiliation(s)
- Kurukkal
Balakrishnan Subila
- School
of Chemistry, Indian Institute of Science
Education and Research Thiruvananthapuram (IISER-TVM), Vithura, Maruthamala (PO), Thiruvananthapuram 695551, India
| | - Kulangara Sandeep
- School
of Chemistry, Indian Institute of Science
Education and Research Thiruvananthapuram (IISER-TVM), Vithura, Maruthamala (PO), Thiruvananthapuram 695551, India
| | - Elizabeth Mariam Thomas
- School
of Chemistry, Indian Institute of Science
Education and Research Thiruvananthapuram (IISER-TVM), Vithura, Maruthamala (PO), Thiruvananthapuram 695551, India
| | - Jay Ghatak
- Chemistry
and Physics of Materials Unit, Jawaharlal
Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur (PO), Bangalore 560064, India
| | - Sonnada Math Shivaprasad
- Chemistry
and Physics of Materials Unit, Jawaharlal
Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur (PO), Bangalore 560064, India
| | - K. George Thomas
- School
of Chemistry, Indian Institute of Science
Education and Research Thiruvananthapuram (IISER-TVM), Vithura, Maruthamala (PO), Thiruvananthapuram 695551, India
- Chemistry
and Physics of Materials Unit, Jawaharlal
Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur (PO), Bangalore 560064, India
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34
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Kozytskiy AV, Stroyuk OL, Raevskaya AE, Kuchmy SY. Photoelectrochemical Solar Cells with Semiconductor Nanoparticles and Liquid Electrolytes: a Review. THEOR EXP CHEM+ 2017. [DOI: 10.1007/s11237-017-9512-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Huang S, Zai J, Ma D, Hu Z, He Q, Wu M, Chen D, Chen Z, Qian X. Improving the catalytic performance of Ni 3 S 4 -PtCo heteronanorods via Mott-Schottky effect toward the reduction of iodine couples in dye-sensitized solar cells. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.116] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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36
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Ding Q, Czech KJ, Zhao Y, Zhai J, Hamers RJ, Wright JC, Jin S. Basal-Plane Ligand Functionalization on Semiconducting 2H-MoS 2 Monolayers. ACS APPLIED MATERIALS & INTERFACES 2017; 9:12734-12742. [PMID: 28332817 DOI: 10.1021/acsami.7b01262] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Molybdenum disulfide (MoS2) is a two-dimensional material promising for electronic, optical, and catalytic applications. To fully harness its potential, functionalization is essential to controlling its properties. However, MoS2 functionalization has been mostly limited to either 1T-phase MoS2 or the edges of 2H-phase MoS2, and the chemistry of covalent functionalization on the basal plane of 2H-MoS2 is poorly understood. Here, we report a facile approach to covalently functionalize chemical vapor deposition (CVD) grown 2H-MoS2 monolayers (MLs), as well as mechanically exfoliated MoS2, via thiol conjugation at sulfur vacancies on the basal plane. Thorough characterization confirmed the functionalization by thiol molecules on MoS2 MLs, and we experimentally proved that sulfur vacancies in MoS2 MLs play a key role in the functionalization of basal planes. By the controlling of the amount of sulfur vacancies via sulfur annealing, the degree of MoS2 functionalization was effectively tuned. Because thiol conjugation partially repairs or passivates sulfur vacancies, enhanced photoluminescence response and decreased active sites for hydrogen evolution catalysis were observed for functionalized MoS2. Moreover, such functionalization can be utilized for making MoS2-based heterostructures, an example of which was demonstrated using a dithiol molecule to link MoS2 layers and PbSe quantum dots. These results provide new understanding and insights on the surface chemistry of MoS2 and open up more opportunities for MoS2 MLs with well-controlled properties and broader applications.
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Affiliation(s)
- Qi Ding
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Kyle J Czech
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Yuzhou Zhao
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jianyuan Zhai
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Robert J Hamers
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - John C Wright
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Song Jin
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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37
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Coughlan C, Ibáñez M, Dobrozhan O, Singh A, Cabot A, Ryan KM. Compound Copper Chalcogenide Nanocrystals. Chem Rev 2017; 117:5865-6109. [PMID: 28394585 DOI: 10.1021/acs.chemrev.6b00376] [Citation(s) in RCA: 331] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.
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Affiliation(s)
- Claudia Coughlan
- Department of Chemical Sciences and Bernal Institute, University of Limerick , Limerick, Ireland
| | - Maria Ibáñez
- Catalonia Energy Research Institute - IREC, Sant Adria de Besos , Jardins de les Dones de Negre n.1, Pl. 2, 08930 Barcelona, Spain
| | - Oleksandr Dobrozhan
- Catalonia Energy Research Institute - IREC, Sant Adria de Besos , Jardins de les Dones de Negre n.1, Pl. 2, 08930 Barcelona, Spain.,Department of Electronics and Computing, Sumy State University , 2 Rymskogo-Korsakova st., 40007 Sumy, Ukraine
| | - Ajay Singh
- Materials Physics & Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Andreu Cabot
- Catalonia Energy Research Institute - IREC, Sant Adria de Besos , Jardins de les Dones de Negre n.1, Pl. 2, 08930 Barcelona, Spain.,ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Kevin M Ryan
- Department of Chemical Sciences and Bernal Institute, University of Limerick , Limerick, Ireland
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38
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Ye M, Zhao Z, Hu Z, Liu L, Ji H, Shen Z, Ma T. 0D/2D Heterojunctions of Vanadate Quantum Dots/Graphitic Carbon Nitride Nanosheets for Enhanced Visible‐Light‐Driven Photocatalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611127] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Meng‐Yang Ye
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Zhi‐Hao Zhao
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Zhuo‐Feng Hu
- The Chinese University of Hong Kong Shatin Hong Kong China
| | - Le‐Quan Liu
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Hui‐Ming Ji
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Zhu‐Rui Shen
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Tian‐Yi Ma
- School of Chemical Engineering The University of Adelaide Adelaide SA 5005 Australia
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39
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Ye M, Zhao Z, Hu Z, Liu L, Ji H, Shen Z, Ma T. 0D/2D Heterojunctions of Vanadate Quantum Dots/Graphitic Carbon Nitride Nanosheets for Enhanced Visible‐Light‐Driven Photocatalysis. Angew Chem Int Ed Engl 2017; 56:8407-8411. [DOI: 10.1002/anie.201611127] [Citation(s) in RCA: 322] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/15/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Meng‐Yang Ye
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Zhi‐Hao Zhao
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Zhuo‐Feng Hu
- The Chinese University of Hong Kong Shatin Hong Kong China
| | - Le‐Quan Liu
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Hui‐Ming Ji
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Zhu‐Rui Shen
- Key Laboratory of Advanced Ceramics and Machining Technology Ministry of Education, School of Materials Science and Engineering Tianjin University Tianjin 300072 China
| | - Tian‐Yi Ma
- School of Chemical Engineering The University of Adelaide Adelaide SA 5005 Australia
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40
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Ran J, Wang X, Zhu B, Qiao SZ. Strongly interactive 0D/2D hetero-structure of a ZnxCd1−xS nano-particle decorated phosphorene nano-sheet for enhanced visible-light photocatalytic H2 production. Chem Commun (Camb) 2017; 53:9882-9885. [DOI: 10.1039/c7cc05466a] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coupling of few-layer phosphorene nano-sheets with ZnxCd1−xS nano-particles greatly improved the visible-light photocatalytic H2-production activity.
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Affiliation(s)
- Jingrun Ran
- School of Chemical Engineering
- The University of Adelaide
- Adelaide
- Australia
| | - Xiuli Wang
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian National Laboratory for Clean Energy
- Dalian 116023
| | - Bicheng Zhu
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Shi-Zhang Qiao
- School of Chemical Engineering
- The University of Adelaide
- Adelaide
- Australia
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41
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Rivera-González N, Chauhan S, Watson DF. Aminoalkanoic Acids as Alternatives to Mercaptoalkanoic Acids for the Linker-Assisted Attachment of Quantum Dots to TiO2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:9206-9215. [PMID: 27541724 DOI: 10.1021/acs.langmuir.6b02704] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Linear aminoalkanoic acids (AAAs) and mercaptoalkanoic acids (MAAs) were characterized as bifunctional ligands to tether CdSe QDs to nanocrystalline TiO2 thin films and to mediate excited-state electron transfer (ET) from the QDs to TiO2 nanoparticles. The adsorption of 12-aminododecanoic acid (ADA) and 12-mercaptododecanoic acid (ADA) to TiO2 followed the Langmuir adsorption isotherm. Surface adduct formation constants (Kad) were ∼10(4) M(-1); saturation amounts of the ligands per projected surface area of TiO2 (Γ0) were ∼10(-7) mol cm(-2). Both Kad and Γ0 differed by 20% or less for the two linkers. CdSe QDs adhered to ADA- and MDA-functionalized TiO2 films; data were well modeled by the Langmuir adsorption isotherm and Langmuir kinetics. For ADA- and MDA-mediated assembly values of Kad were (1.8 ± 0.4) × 10(6) and (2.4 ± 0.4) × 10(6) M(-1), values of Γ0 were (1.6 ± 0.3) × 10(-9) and (1.2 ± 0.1) × 10(-9) mol cm(-2), and rate constants were (14 ± 5) and (60 ± 20) M(-1) s(-1), respectively. Thus, the thermodynamics and kinetics of linker-assisted assembly were slightly more favorable for MDA than for ADA. Steady-state and time-resolved emission spectroscopy revealed that electrons were transferred from both band-edge and surface states of CdSe QDs to TiO2 with rate constants (ket) of ∼10(7) s(-1). ET was approximately twice as fast through thiol-bearing linker 4-mercaptobutyric acid (MBA) as through amine-bearing linker 4-aminobutyric acid (ABA). Photoexcited QDs transferred holes to adsorbed MBA. In contrast, ABA did not scavenge photogenerated holes from CdSe QDs, which maximized the separation of charges following ET. Additionally, ABA shifted electron-trapping surface states to higher energies, minimizing the loss of potential energy of electrons prior to ET. These trade-offs involving the kinetics and thermodynamics of linker-assisted assembly; the driving force, rate constant, and efficiency of ET; and the extent of photoinduced charge separation can inform the selection bifunctional ligands to tether QDs to surfaces.
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Affiliation(s)
- Natalia Rivera-González
- Department of Chemistry, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
| | - Saurabh Chauhan
- Department of Chemistry, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
| | - David F Watson
- Department of Chemistry, University at Buffalo, The State University of New York , Buffalo, New York 14260-3000, United States
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42
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Ano T, Kishimoto F, Mochizuki D, Tsubaki S, Maitani MM, Suzuki E, Wada Y. Distance-depending Photoinduced Electron Transfer at Two-dimensional Interface in Alternate Stacked Structures of Tantalate Nanosheets and Tungstate Nanosheets. CHEM LETT 2016. [DOI: 10.1246/cl.160526] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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43
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Plaza DO, Gallardo C, Straub YD, Bravo D, Pérez-Donoso JM. Biological synthesis of fluorescent nanoparticles by cadmium and tellurite resistant Antarctic bacteria: exploring novel natural nanofactories. Microb Cell Fact 2016; 15:76. [PMID: 27154202 PMCID: PMC4858823 DOI: 10.1186/s12934-016-0477-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/27/2016] [Indexed: 11/10/2022] Open
Abstract
Background Fluorescent nanoparticles or quantum dots (QDs) have been intensely studied for basic and applied research due to their unique size-dependent properties. There is an increasing interest in developing ecofriendly methods to synthesize these nanoparticles since they improve biocompatibility and avoid the generation of toxic byproducts. The use of biological systems, particularly prokaryotes, has emerged as a promising alternative. Recent studies indicate that QDs biosynthesis is related to factors such as cellular redox status and antioxidant defenses. Based on this, the mixture of extreme conditions of Antarctica would allow the development of natural QDs producing bacteria. Results In this study we isolated and characterized cadmium and tellurite resistant Antarctic bacteria capable of synthesizing CdS and CdTe QDs when exposed to these oxidizing heavy metals. A time dependent change in fluorescence emission color, moving from green to red, was determined on bacterial cells exposed to metals. Biosynthesis was observed in cells grown at different temperatures and high metal concentrations. Electron microscopy analysis of treated cells revealed nanometric electron-dense elements and structures resembling membrane vesicles mostly associated to periplasmic space. Purified biosynthesized QDs displayed broad absorption and emission spectra characteristic of biogenic Cd nanoparticles. Conclusions Our work presents a novel and simple biological approach to produce QDs at room temperature by using heavy metal resistant Antarctic bacteria, highlighting the unique properties of these microorganisms as potent natural producers of nano-scale materials and promising candidates for bioremediation purposes.
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Affiliation(s)
- D O Plaza
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile.,Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone Pohlhammer # 1007, Santiago, Chile
| | - C Gallardo
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile
| | - Y D Straub
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile
| | - D Bravo
- Laboratorio de Microbiología Oral, Facultad de Odontología, Universidad de Chile, Sergio Livingstone Pohlhammer # 943, Santiago, Chile
| | - J M Pérez-Donoso
- BioNanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Universidad Andres Bello, República # 239, Santiago, Chile.
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44
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Li J, Gao X, Liu B, Feng Q, Li XB, Huang MY, Liu Z, Zhang J, Tung CH, Wu LZ. Graphdiyne: A Metal-Free Material as Hole Transfer Layer To Fabricate Quantum Dot-Sensitized Photocathodes for Hydrogen Production. J Am Chem Soc 2016; 138:3954-7. [DOI: 10.1021/jacs.5b12758] [Citation(s) in RCA: 274] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jian Li
- Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Xin Gao
- Center
for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Bin Liu
- Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Qingliang Feng
- Center
for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Xu-Bing Li
- Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Mao-Yong Huang
- Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Zhongfan Liu
- Center
for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Jin Zhang
- Center
for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons,
Beijing National Laboratory for Molecular Sciences, College of Chemistry
and Molecular Engineering, Peking University, Beijing 100871, P.R. China
| | - Chen-Ho Tung
- Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Li-Zhu Wu
- Key
Laboratory of Photochemical Conversion and Optoelectronic Materials,
Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, P.R. China
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45
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Zhou J, Chen L, Wang Y, He Y, Pan X, Xie E. An overview on emerging photoelectrochemical self-powered ultraviolet photodetectors. NANOSCALE 2016; 8:50-73. [PMID: 26646028 DOI: 10.1039/c5nr06167a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In recent years, as a new member of ultraviolet photodetectors (UV-PDs), photoelectrochemical UV-PDs (PEC UV-PDs) have received great attention. Compared to conventional photoconductors, PEC UV-PDs exhibit a number of merits, including low cost, environmentally friendly nature, being self-powered, and fast response. This tutorial review provides a comprehensive introduction to this research field, covering from the basics of performance evaluation of PEC UV-PDs, the state-of-the-art advances in structural design, electrolyte matching, and electrode fabrication of PEC UV-PDs, to the integration of multiple functions into a PEC UV-PD. In the end, we present our perspectives on the future development of PEC UV-PDs and highlight the key technical challenges in aiming to stimulate further developments in this research field.
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Affiliation(s)
- Jinyuan Zhou
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
| | - Lulu Chen
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
| | - Youqing Wang
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
| | - Yongmin He
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
| | - Xiaojun Pan
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
| | - Erqing Xie
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China.
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46
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Punnoose D, Pavan Kumar CHSS, Seo HW, Shiratani M, Reddy AE, Srinivasa Rao S, Thulasi-Varma CV, Kim SK, Chung SH, Kim HJ. Reduced recombination with an optimized barrier layer on TiO2 in PbS/CdS core shell quantum dot sensitized solar cells. NEW J CHEM 2016. [DOI: 10.1039/c5nj02947c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A solar cell based on a double coating electrode (MgO/Al2O3) on TiO2 yielded excellent performance with an efficiency (η) of 3.25%.
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Affiliation(s)
- Dinah Punnoose
- Department of Electrical and Computer Engineering
- Busan 46241
- Korea
| | | | - Hyun Woong Seo
- Department of Electronics
- Kyushu University
- Fukuoka 819-0395
- Japan
| | | | | | - S. Srinivasa Rao
- Department of Electrical and Computer Engineering
- Busan 46241
- Korea
| | | | - Soo-Kyoung Kim
- Department of Electrical and Computer Engineering
- Busan 46241
- Korea
| | - Sang-Hwa Chung
- Department of Electrical and Computer Engineering
- Busan 46241
- Korea
| | - Hee-Je Kim
- Department of Electrical and Computer Engineering
- Busan 46241
- Korea
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47
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Paul S, Ghosh S, Saha M, De SK. Enhanced photophysical properties of plasmonic magnetic metal-alloyed semiconductor heterostructure nanocrystals: a case study for the Ag@Ni/Zn1−xMgxO system. Phys Chem Chem Phys 2016; 18:13092-107. [DOI: 10.1039/c6cp00375c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiple plasmonic magnetic Ag@Ni core–shell metal nanocrystal decorated Zn1−xMgxO nanoheterostructures have been synthesized and enhanced photophysical properties were found.
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Affiliation(s)
- Sumana Paul
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Sirshendu Ghosh
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - Manas Saha
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
| | - S. K. De
- Department of Materials Science
- Indian Association for the Cultivation of Science
- Kolkata-700032
- India
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48
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Kharade SD, Pawar NB, Khot KV, Patil PB, Mali SS, Hong CK, Patil PS, Bhosale PN. Enhanced photoelectrochemical performance of novel p-type MoBiCuSe4 thin films deposited by a simple surfactant-mediated solution route. RSC Adv 2016. [DOI: 10.1039/c5ra21553f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanostructured MoBiCuSe4 thin films with different morphologies deposited using different surfactants, such as PEG, SDS and TOPO, through a surfactant-mediated modified chemical route for PEC application.
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Affiliation(s)
- Suvarta D. Kharade
- Materials Research Laboratory
- Department of Chemistry
- Shivaji University
- Kolhapur-416004
- India
| | - Nita B. Pawar
- Materials Research Laboratory
- Department of Chemistry
- Shivaji University
- Kolhapur-416004
- India
| | - Kishorkumar V. Khot
- Materials Research Laboratory
- Department of Chemistry
- Shivaji University
- Kolhapur-416004
- India
| | - Pallavi B. Patil
- Materials Research Laboratory
- Department of Chemistry
- Shivaji University
- Kolhapur-416004
- India
| | - Sawanta S. Mali
- Thin Film Materials Laboratory
- Department of Physics
- Shivaji University
- Kolhapur-416004
- India
| | - Chang K. Hong
- Polymer Energy Materials Laboratory
- Department of Advanced Chemical Engineering
- Chonnam National University
- Gwangju
- South Korea 500-757
| | - Pramod S. Patil
- Thin Film Materials Laboratory
- Department of Physics
- Shivaji University
- Kolhapur-416004
- India
| | - Popatrao N. Bhosale
- Materials Research Laboratory
- Department of Chemistry
- Shivaji University
- Kolhapur-416004
- India
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49
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Gopi CVVM, Venkata-Haritha M, Seo H, Singh S, Kim SK, Shiratani M, Kim HJ. Improving the performance of quantum dot sensitized solar cells through CdNiS quantum dots with reduced recombination and enhanced electron lifetime. Dalton Trans 2016; 45:8447-57. [DOI: 10.1039/c6dt00283h] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni2+ doped CdS QDs in QDSSCs can suppress charge recombination, prolong the electron lifetime and improve the PCE of the cell.
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Affiliation(s)
| | | | - Hyunwoong Seo
- Department of Electronics
- Kyushu university
- Fukuoka
- Japan
| | - Saurabh Singh
- School of Materials Science & Engineering
- Pusan National University
- Busan 46241
- South Korea
| | | | | | - Hee-Je Kim
- School of Electrical Engineering
- Pusan National University
- Busan
- South Korea
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50
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Xing Z, Wang L, Yang X. Cobalt disulfide nanowires as an effective fluorescent sensing platform for DNA detection. J Mater Chem B 2016; 4:2860-2863. [DOI: 10.1039/c6tb00087h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cobalt disulfide nanowires are synthesized in solution using a facile two-step hydrothermal method for the first time and applied as an effective sensing platform for nucleic acid detection.
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Affiliation(s)
- Zhicai Xing
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Lei Wang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Xiurong Yang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
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