Hollow PbWO<sub>4</sub> Nanospindles via a Facile Sonochemical Route

Geng, Jianhua; Zhu, Jun‐Jie; Lu, Dujuan; Chen, Hong‐Yuan

doi:10.1021/ic0608804

Cited by 100 publications

(74 citation statements)

References 64 publications

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“…In other words, the complex micellar aggregates formed by P123 acted as the templates for the formation of the NaNbO 3 1D nanowires, which is somewhat similar to the those in Ag 0.35 V 2 O 5 [26], PbWO 4 [35] and LaPO 4 cases [36]. The possible growth mechanism proposed here mainly involved four steps in sequence: (1) aggregation of micelles from P123 [38,39] (2) adsorption of niobium hydroxide (Nb 2 O 5 ÁxH 2 O) and Na ? ions onto the surface of Pluronic P123 micelle and the interbonding between Na ?…”

Section: Structures and Morphologymentioning

confidence: 56%

NaNbO3 Nanostructures: Facile Synthesis, Characterization, and Their Photocatalytic Properties

et al. 2009

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NaNbO 3 nanowires and cubes were synthesized by means of a facile surfactant-assisted hydrothermal process. The NaNbO 3 nanowires were single-crystalline and showed uniform size with a diameter of about 100 nanometers in width and length of up to several tens of micrometers in length. The NaNbO 3 cubes displayed edges of several hundred nanometers. Meanwhile, the possible growth mechanism of NaNbO 3 nanowires was proposed. In addition, the photocatalytic activities of the NaNbO 3 samples were evaluated for the H 2 evolution from CH 3 OH/ H 2 O solution under UV light irradiation. Compared with the cubes-NaNbO 3 and a NaNbO 3 sample prepared by solid state reaction method, NaNbO 3 nanowires showed a much higher photocatalytic activity.

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Section: Structures and Morphologymentioning

confidence: 56%

NaNbO3 Nanostructures: Facile Synthesis, Characterization, and Their Photocatalytic Properties

et al. 2009

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“…[344] The intriguing formation mechanism was clearly identified to involve the formation of cubic template crystals made mainly of the surfactant (SDBS) molecules and subsequent growth of Co 3 O 4 nanocrystals on the template surface. Geng et al have synthesized PbWO 4 hollow nanospindles via a surfactant (P123)-mediated sonochemical route, [345] where the complex micellar aggregates formed from P123 and lead acetate around the cavitation bubbles are thought to serve as non-spherical soft templates. Yang et al have recently reported the synthesis of a siliceous structure with an unusual silkworm cocoonlike morphology using CTAB and perfluorooctanoic acid as cotemplates.…”

Section: Soft-templating Synthesis Of Non-spherical Hollow Structuresmentioning

confidence: 99%

Hollow Micro‐/Nanostructures: Synthesis and Applications

2008

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Hollow micro‐/nanostructures are of great interest in many current and emerging areas of technology. Perhaps the best‐known example of the former is the use of fly‐ash hollow particles generated from coal power plants as partial replacement for Portland cement, to produce concrete with enhanced strength and durability. This review is devoted to the progress made in the last decade in synthesis and applications of hollow micro‐/nanostructures. We present a comprehensive overview of synthetic strategies for hollow structures. These strategies are broadly categorized into four themes, which include well‐established approaches, such as conventional hard‐templating and soft‐templating methods, as well as newly emerging methods based on sacrificial templating and template‐free synthesis. Success in each has inspired multiple variations that continue to drive the rapid evolution of the field. The Review therefore focuses on the fundamentals of each process, pointing out advantages and disadvantages where appropriate. Strategies for generating more complex hollow structures, such as rattle‐type and nonspherical hollow structures, are also discussed. Applications of hollow structures in lithium batteries, catalysis and sensing, and biomedical applications are reviewed.

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“…Examples of successful sonochemical syntheses include TiO 2 , [56] ZnO, [57][58][59] CeO 2 , [60] MoO 3 , [61] V 2 O 5 , [62] In 2 O 3 , [63] ZnFe 2 O 4 , [64] PbWO 4 , [65,66] BiPO 4 , [67] and ZnAl 2 O 4 . [68] Yu and coworkers revealed that sonochemically prepared titania nanoparticles are more photocatalytically active than commercial titania nanoparticles (e.g., Degussa P25).…”

Section: Metal Oxidesmentioning

confidence: 99%

Applications of Ultrasound to the Synthesis of Nanostructured Materials

2010

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Recent advances in nanostructured materials have been led by the development of new synthetic methods that provide control over size, morphology, and nano/microstructure. The utilization of high intensity ultrasound offers a facile, versatile synthetic tool for nanostructured materials that are often unavailable by conventional methods. The primary physical phenomena associated with ultrasound that are relevant to materials synthesis are cavitation and nebulization. Acoustic cavitation (the formation, growth, and implosive collapse of bubbles in a liquid) creates extreme conditions inside the collapsing bubble and serves as the origin of most sonochemical phenomena in liquids or liquid-solid slurries. Nebulization (the creation of mist from ultrasound passing through a liquid and impinging on a liquid-gas interface) is the basis for ultrasonic spray pyrolysis (USP) with subsequent reactions occurring in the heated droplets of the mist. In both cases, we have examples of phase-separated attoliter microreactors: for sonochemistry, it is a hot gas inside bubbles isolated from one another in a liquid, while for USP it is hot droplets isolated from one another in a gas. Cavitation-induced sonochemistry provides a unique interaction between energy and matter, with hot spots inside the bubbles of approximately 5000 K, pressures of approximately 1000 bar, heating and cooling rates of >10(10) K s(-1); these extraordinary conditions permit access to a range of chemical reaction space normally not accessible, which allows for the synthesis of a wide variety of unusual nanostructured materials. Complementary to cavitational chemistry, the microdroplet reactors created by USP facilitate the formation of a wide range of nanocomposites. In this review, we summarize the fundamental principles of both synthetic methods and recent development in the applications of ultrasound in nanostructured materials synthesis.

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Hollow PbWO₄ Nanospindles via a Facile Sonochemical Route

Cited by 100 publications

References 64 publications

NaNbO3 Nanostructures: Facile Synthesis, Characterization, and Their Photocatalytic Properties

NaNbO3 Nanostructures: Facile Synthesis, Characterization, and Their Photocatalytic Properties

Hollow Micro‐/Nanostructures: Synthesis and Applications

Applications of Ultrasound to the Synthesis of Nanostructured Materials

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Hollow PbWO4 Nanospindles via a Facile Sonochemical Route

Cited by 100 publications

References 64 publications

NaNbO3 Nanostructures: Facile Synthesis, Characterization, and Their Photocatalytic Properties

NaNbO3 Nanostructures: Facile Synthesis, Characterization, and Their Photocatalytic Properties

Hollow Micro‐/Nanostructures: Synthesis and Applications

Applications of Ultrasound to the Synthesis of Nanostructured Materials

Contact Info

Product

Resources

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Hollow PbWO₄ Nanospindles via a Facile Sonochemical Route