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负载银纳米颗粒的 BaCaTiZrO 用于多催化染料降解。

Ag-nanoparticles-loaded BaCaTiZrO for multicatalytic dye degradation.

作者信息

Sharma Moolchand, Singh Gurpreet, Vaish Rahul

出版信息

Nanotechnology. 2021 Jan 19;32(14):145716. doi: 10.1088/1361-6528/abd5e6.

Abstract

BaCaTiZrO (BCZTO) ferroelectric ceramic loaded with Ag nanoparticles (NPs) was explored for its photo/piezocatalytic performance. The presence of Ag loading on BCZTO ceramic was confirmed using electron microscopes. X-ray photoelectron spectroscopy revealed the metallic chemical state of Ag NPs loaded on the surface of BCZTO ceramic. The absorbance spectrum of the Ag-loaded BCZTO sample showed a visible light absorption hump due to the phenomenon of surface plasmonic resonance. During the photocatalysis process, the [Formula: see text]99% of rhodamine B (RB) dye was degraded in aqueous solution using the Ag-loaded BCZTO sample, showing its promising photocatalysis activity. During the piezocatalysis process, the [Formula: see text]95% of RB dye was degraded using the Ag-loaded BCZTO sample, showing its promising piezocatalytic activity. The ·OH radical species were found responsible for the photocatalytic and piezocatalytic performance. The photo/piezocatalytic performance was found to be consistent over five cycles, indicating promising reusability of the Ag-loaded BCZTO sample.

摘要

研究了负载银纳米颗粒(NPs)的BaCaTiZrO(BCZTO)铁电陶瓷的光催化/压电催化性能。使用电子显微镜确认了BCZTO陶瓷上银负载的存在。X射线光电子能谱揭示了负载在BCZTO陶瓷表面的银纳米颗粒的金属化学状态。负载银的BCZTO样品的吸收光谱由于表面等离子体共振现象而呈现出可见光吸收峰。在光催化过程中,使用负载银的BCZTO样品,水溶液中99%的罗丹明B(RB)染料被降解,显示出其良好的光催化活性。在压电催化过程中,使用负载银的BCZTO样品,95%的RB染料被降解,显示出其良好的压电催化活性。发现·OH自由基是光催化和压电催化性能的原因。发现光催化/压电催化性能在五个循环中保持一致,表明负载银的BCZTO样品具有良好的可重复使用性。

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