Showing papers by "Yingpu Bi published in 2013"
TL;DR: Herein, it is demonstrated for the first time the fabrication of concave trisoctahedral Ag(3)PO(4) microcrystals enclosed by {221} and {332} facets based on the heteroepitaxial growth procedure, which exhibit much higher photocatalytic activities than cubic Ag( 3)PO (4) and commercial N-doped TiO(2).
137 citations
TL;DR: Tetrahedral Ag3PO4 submicro-crystals have been fabricated in high-yield by directly reacting commercial Ag foils with H2O2 and NaH2PO4 in aqueous solution at room temperature as mentioned in this paper.
Abstract: Tetrahedral Ag3PO4 submicro-crystals have been fabricated in high-yield by directly reacting commercial Ag foils with H2O2 and NaH2PO4 in aqueous solution at room temperature, which exhibit higher photocatalytic activities than Ag3PO4 cubes, particles, and N-doped TiO2 for the degradation of organic contaminants under visible light irradiation.
112 citations
TL;DR: It is demonstrated that uniform Ag nanoparticles could be directionally grafted on the tip of ZnO nanowire arrays by a simple photo-reduction method and could promote the effective separation and directional transfer of photoexcited electron-hole pairs, and thus enhance the photoconversion properties.
Abstract: Herein, we demonstrate that uniform Ag nanoparticles could be directionally grafted on the tip of ZnO nanowire arrays by a simple photo-reduction method. Furthermore, the structure, position, and amount of Ag nanoparticles supported on ZnO nanowire arrays could be further rationally tailored by changing the reaction parameters such as the category, concentration of reagents, and annealing temperature. Moreover, their photoelectrochemical performances under both UV-vis and monochromatic light irradiation have been explored. Interestingly, the photocurrent density of Ag–ZnO heterostructures could reach up to 2.40 mA cm−2, which is much higher than that of pure ZnO nanowire arrays. It has been proposed that the formation of ZnO nanowire arrays tip-grafted with Ag nanoparticles could promote the effective separation and directional transfer of photoexcited electron–hole pairs, and thus enhance the photoconversion properties.
104 citations
TL;DR: This work demonstrates the fabrication of visible-light-responsive heterostructured Cr-doped SrTiO3/TiO2 nanotube arrays by a simple hydrothermal method, which facilitate efficient charge separation and thus improve the photoelectrochemical as well as photocatalytic performances.
Abstract: Well-aligned TiO2 nanotube arrays have become of increasing significance because of their unique highly ordered array structure, high specific surface area, unidirectional charge transfer and transportation features However, their poor visible light utilization as well as the high recombination rate of photoexcited electron-hole pairs greatly limited their practical applications Herein, we demonstrate the fabrication of visible-light-responsive heterostructured Cr-doped SrTiO3/TiO2 nanotube arrays by a simple hydrothermal method, which facilitate efficient charge separation and thus improve the photoelectrochemical as well as photocatalytic performances
87 citations
TL;DR: It is demonstrated that the multiple-pn-junction structure is favorable to enhancing the photocurrent density and the onset potential of the photoelectrode and the carrier transfer inside the photoElectrode is improved by narrowing the single-layer thickness.
Abstract: Nanomultiple CaFe2O4/ZnFe2O4pn junctions are prepared by a pulsed laser deposition method to explore their photoelectrochemical properties as the photoelectrodes. It is demonstrated that the multiple-pn-junction structure is favorable to enhancing the photocurrent density and the onset potential of the photoelectrode. Furthermore, the 20-junction photoelectrode-based PEC cell yields a high open circuit photovoltage of up to 0.97 V, which is much higher than that for a single pn junction photoelectrode PEC cell that yields an open circuit photovoltage of 0.13 V. A multiple-junction band structure model is assumed to describe the behavior of the CaFe2O4/ZnFe2O4 multiple-junction photoelectrodes. It is suggested that the open circuit photovoltage is dominated by the number of pn junctions in a multiple-junction photoelectrode and the carrier transfer inside the photoelectrode is improved by narrowing the single-layer thickness. These findings provide a new approach to designing the multiple-junction structur...
68 citations
TL;DR: This paper aims to demonstrate the efforts towards in-situ applicability of EMMARM, as to provide real-time information about concrete mechanical properties such as E-modulus and compressive strength.
Abstract: the “Hundred Talents Program” of the Chinese Academy of Science;the National Natural Science Foundation of China (21273255;21173242);973 Program;863 Program of China (2012AA051501;2009CB22003;2009AA05Z117;2012CB7209001)
61 citations
TL;DR: In this article, a facile and general process for fabricating uniform and perfect Ag/Ag3PO4 core-shell coaxial hetero-nanowires at room temperature is presented.
Abstract: Herein, we demonstrate a facile and general process for fabricating uniform and perfect Ag/Ag3PO4 core–shell coaxial hetero-nanowires at room temperature, which exhibit excellent photocatalytic activities for degradation of organic contaminants under visible light irradiation.
45 citations
TL;DR: Necklace-like Ag3PO4polyacrylonitrile (PAN) hetero-nanofibers have been successfully fabricated through a simple and facile electrospinning technique and exhibit excellent photocatalytic activities for the degradation of organic contaminants under visible light irradiation as mentioned in this paper.
Abstract: Necklace-like Ag3PO4–polyacrylonitrile (PAN) hetero-nanofibers have been successfully fabricated through a simple and facile electrospinning technique and exhibit excellent photocatalytic activities for the degradation of organic contaminants under visible light irradiation.
37 citations
01 Jan 2013
TL;DR: In this article, a multiple-pn-junction structure is proposed to enhance the photocurrent density and the onset potential of the photoelectrode, and it is shown that the multiple-PN-based PEC cell yields a high open circuit photovoltage of up to 0.97 V.
Abstract: Nanomultiple CaFe2O4/ZnFe2O4 pn junctions are prepared by a pulsed laser deposition method to explore their photoelectrochemical properties as the photoelectrodes. It is demonstrated that the multiple-pn-junction structure is favorable to enhancing the photocurrent density and the onset potential of the photoelectrode. Furthermore, the 20-junction photoelectrode-based PEC cell yields a high open circuit photovoltage of up to 0.97 V, which is much higher than that for a single pn junction photoelectrode PEC cell that yields an open circuit photovoltage of 0.13 V. A multiple- junction band structure model is assumed to describe the behavior of the CaFe2O4/ ZnFe2O4 multiple-junction photoelectrodes. It is suggested that the open circuit photovoltage is dominated by the number of pn junctions in a multiple-junction photoelectrode and the carrier transfer inside the photoelectrode is improved by narrowing the single-layer thickness. These findings provide a new approach to designing the multiple-junction structure to improve the PEC properties of the photoelectrodes.
3 citations