Near‐Infrared Photocatalytic Upconversion Nanoparticles/TiO<sub>2</sub> Nanofibers Assembled in Large Scale by Electrospinning

Fu, Zhang; Zhang, Chuanling; Peng, Huang-Yong; Cong, Huai‐Ping; Qian, Haisheng

doi:10.1002/ppsc.201600010

Cited by 100 publications

(37 citation statements)

References 55 publications

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“…Rhodamine B (RhB) solution was used as a typical pollutant to evaluate the photocatalytic activities of the as‐obtained ZnO samples with various morphologies and sizes. Figure S6 (in the Supporting Information) shows the UV/Vis absorption spectra of RhB aqueous solution containing 20 mg of ZnO powder after exposure to UV for different durations.…”

Section: Resultsmentioning

confidence: 99%

Polymorphous ZnO Nanostructures: Zn Polar Surface‐Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

Zhao

Cui

et al. 2017

ChemCatChem

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This study proposes a simple, low‐temperature chemical etching method for selective preparation of monodispersed, hexagonal, single‐crystal ZnO nanostructures. The morphological evolution from nanoplates (NPs) to nanoseals (NSs), nanobowls (NBs), and nanorings (NRs) is initiated by positively charged (0 0 0 1) Zn polar surface and driven by the principle of minimum energy. The relationship among the morphology, dimensions, and function of ZnO was determined by investigating polar planes, surface areas, energy bands, defects, optical properties, and catalytic activity for rhodamine B degradation. The ZnO NBs and ZnO NRs exhibit improved photocatalytic performance because of enhanced light harvesting and plasmonic resonance enhanced absorption. Surface recombination plays a key role in the apparent rate constant k for ZnO NBs with small size and those formed at low reaction temperatures. The photocatalytic activity of ZnO NBs formed at high reaction temperatures decreases with increasing size because of the decreased surface area.

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Section: Resultsmentioning

confidence: 99%

Polymorphous ZnO Nanostructures: Zn Polar Surface‐Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

Zhao

Cui

et al. 2017

ChemCatChem

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“…However, taking the lowest electric potential demand for generation of some strong oxidation actives into account, it is better to adopt pyroelectric nanofibers, not nanoparticles, to design pyro-electro-chemical catalysis. In pyro-electro-catalysis, the pyroelectrically induced electric potential difference between the anode and cathode is critical for electrochemical catalytic process and the necessary potential difference is thermodynamically at least 1.7 V and 1.9 V for the generation of •OH and •O2 − radicals, respectively [26,27]. Both the temperature alternation range and the size of pyroelectric particle can affect the output electric potential.…”

Section: Resultsmentioning

confidence: 99%

Pyroelectrically Induced Pyro-Electro-Chemical Catalytic Activity of BaTiO3 Nanofibers under Room-Temperature Cold–Hot Cycle Excitations

Xia

Jia

Qian

et al. 2017

Metals

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A pyro-electro-chemical catalytic dye decomposition using lead-free BaTiO 3 nanofibers was realized under room-temperature cold-hot cycle excitation (30-47 • C) with a high Rhodamine B (RhB) decomposition efficiency~99%, which should be ascribed to the product of pyro-electric effect and electrochemical redox reaction. Furthermore, the existence of intermediate product of hydroxyl radical in pyro-electro-chemical catalytic process was also observed. There is no significant decrease in pyro-electro-chemical catalysis activity after being recycled five times. The pyro-electrically induced pyro-electro-chemical catalysis provides a high-efficient, reusable and environmentally friendly technology to remove organic pollutants from water.

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“…PAN‐based nanofibers are extensively applied in photocatalysis, supercapacitors, filters and sensors because of their high carbon content and strong mechanical properties. However, due to the extremely fine diameter of electrospun PAN‐based nanofibers, their mechanical properties are poor when used to construct multifunctional materials.…”

Section: Introductionmentioning

confidence: 99%

Neoteric Conjugative Electrospinning towards Alloplastic Nanofiber Yarns Affording Enhanced Upconversion Luminescence and Tailored Magnetism

et al. 2020

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Upconversion luminescent-magnetic [Y 2 O 3 :Yb 3 + , Er 3 + /polyacrylonitrile (PAN)]//[CoFe 2 O 4 /PAN] alloplastic nanofiber yarns (ANYs) are successfully prepared by a novel conjugative electrospinning. The ANYs consist of two different kinds of nanofibers, respectively called as [CoFe 2 O 4 /PAN] magnetic nanofibers and [Y 2 O 3 :Yb 3 + , Er 3 + /PAN] upconversion luminescent nanofibers, and the two kinds of nanofibers are combined together and twisted to form ANYs. Pumped by 980-nm laser, the ANYs exhibit excellent upconversion luminescence (UCL) and orange-red fluorescence. ANYs demonstrate tailored saturation magnetization by modulating CoFe 2 O 4 nanoparticles (NPs) content. The influence mechanism of magnetic CoFe 2 O 4 NPs on the UCL of ANYs is detailedly explored. The relationship between mechanicalproperties and twist for ANYs is explored through the tensile test. Compared with the counterpart coessential nanofiber yarns (CNYs), ANYs exhibit about 10 times stronger UCL intensity owing to the complete separation of the upconversion luminescent substance from the magnetic substance and thereby great reduction of impact of the magnetic substance on the upconversion luminescent substance. Thus, concurrent enhancive upconversion luminescence (UCL) and tunable magnetism of the ANYs are successfully achieved. The detailed formation mechanism of ANYs is advanced and a novel fabrication technique of yarns is established and can be popularized to prepare other bi-and multi-functional nanofibrous yarns.

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Near‐Infrared Photocatalytic Upconversion Nanoparticles/TiO₂ Nanofibers Assembled in Large Scale by Electrospinning

Cited by 100 publications

References 55 publications

Polymorphous ZnO Nanostructures: Zn Polar Surface‐Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

Polymorphous ZnO Nanostructures: Zn Polar Surface‐Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

Pyroelectrically Induced Pyro-Electro-Chemical Catalytic Activity of BaTiO3 Nanofibers under Room-Temperature Cold–Hot Cycle Excitations

Neoteric Conjugative Electrospinning towards Alloplastic Nanofiber Yarns Affording Enhanced Upconversion Luminescence and Tailored Magnetism

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Near‐Infrared Photocatalytic Upconversion Nanoparticles/TiO2 Nanofibers Assembled in Large Scale by Electrospinning

Cited by 100 publications

References 55 publications

Polymorphous ZnO Nanostructures: Zn Polar Surface‐Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

Polymorphous ZnO Nanostructures: Zn Polar Surface‐Guided Size and Shape Evolution Mechanism and Enhanced Photocatalytic Activity

Pyroelectrically Induced Pyro-Electro-Chemical Catalytic Activity of BaTiO3 Nanofibers under Room-Temperature Cold–Hot Cycle Excitations

Neoteric Conjugative Electrospinning towards Alloplastic Nanofiber Yarns Affording Enhanced Upconversion Luminescence and Tailored Magnetism

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Near‐Infrared Photocatalytic Upconversion Nanoparticles/TiO₂ Nanofibers Assembled in Large Scale by Electrospinning