Hard Template Synthesis of Mesoporous and Nanocrystalline Alkali Metal Niobates with Enhanced Photocatalytic Performance

Qing Li; Li Ya Wang; Xiu Kai Li

doi:10.4028/www.scientific.net/AMM.367.12

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In Situ Polymerization of Polyaniline/Viscose Fiber
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Hard Template Synthesis of Mesoporous and Nanocrystalline Alkali Metal Niobates with Enhanced Photocatalytic Performance
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Phase Transition Behaviors and Thermal Conductivity of Ge Doped Sb₂Te Thin Films for Phase Change Random Access Memory
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Influence of the Gas Environment on the Transfered Film of the Tribologic Brass (CuZn)/XC48 Steel COUPLE
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Artificial Neural Network Model: Prediction of Mechanical Properties in Beta-Titanium Biomaterial
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 367Hard Template Synthesis of Mesoporous and...

Hard Template Synthesis of Mesoporous and Nanocrystalline Alkali Metal Niobates with Enhanced Photocatalytic Performance

Abstract:

A nanocasting method using SBA-15 as a hard template was adopted to prepare mesoporous nanocrystalline ANbO₃ (A = Li, Na, and K) samples. The characteristics of samples werecharacterized by techniques such asXRD, N₂-sorption measurement, HRTEM and UVDRS. It was found that thealkality of the alkali metals could have profound impacts on the synthesis andthe physical properties of samples. The Li, Na, and K precursors can reacteasily with the siliceous template, and the reactivity varies with the alkalityof the alkali metal. The synthesis of KNbO₃ is unsuccessful because of the high alkality ofK. The templated LiNbO₃ andNaNbO₃ consist of single crystalline nanoparticles that generate interparticle mesoporosity. The LiNbO₃andNaNbO₃ samples showed notably enhanced photocatalytic activitiesfor 2-propanol photodegradation in comparison to the counterparts prepared bythe solid state reaction.