Abstract

Bismuth layered ferroelectric nanomaterials exhibit great potential for piezo-photocatalysis. However, a major challenge lies in the difficulty of recovering the catalytic powders, raising concerns about secondary pollution of water. In this work, a novel hierarchical porous ferroelectric ceramic containing {110} surface-exposed Bi3.15Nd0.85Ti3O12 (BIT-Nd) nanosheet arrays that were grown on a porous ceramic matrix has been fabricated for efficient and recyclable piezo-photocatalysis. By controlling the BIT-Nd loading level of nanosheets, the piezo-photocatalytic degradation efficiency of RhB (C0 = 10 mg/L) solution reached the optimum value of 97.1% in 100 minutes with a first-order kinetic rate constant, k, of up to 0.0321 min-1 in Bi3.15Nd0.85Ti3O12-20 (BITNd-20), with a mass ratio of hydrothermal products to ceramics of 20%. In the presence of 2.566 g of BITNd-20, a surprising H2 yield rate of 130 μmol·h-1 was achieved without cocatalyst or scavenger. Specially, the beneficial role of snowflake structures on piezoelectric potential amplification and introducing nanosheets with exposed {110} surfaces on hydrogen evolution reaction (HER) activity, piezoelectric potential output, and catalytic performance of porous ceramics has been revealed. The uniquely designed strategy provides a new approach to enhance the piezo-photocatalytic activity by addressing environmental issues and enhancing catalytic performance to yield cleaner energy.
Original languageEnglish
Article number2410145
JournalSmall
Early online date27 Jan 2025
DOIs
Publication statusE-pub ahead of print - 27 Jan 2025

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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