Ultrasound-assisted synthesis of strontium-bismuth titanate and its application in environmental remediation

IF 8.7 1区化学 Q1 ACOUSTICS

Ultrasonics Sonochemistry Pub Date : 2025-05-07 DOI:10.1016/j.ultsonch.2025.107380

Ermelinda Falletta , Anna Donnadio , Nikoletta Mila , Niloofar Haghshenas , Vincenzo Fabbrizio , Riccardo Vivani , Alessia Giordana , Gabriele Perna , Francesco Cottone , Alessandro Di Michele , Claudia L. Bianchi

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引用次数: 0

Abstract

The pollution of water and air in our world has become a global challenge that requires innovative and sustainable strategies. In this work, the ultrasound-assisted synthesis of bare strontium titanate (STO) and bismuth-doped STO (Bi-STO) is proposed to enhance the photocatalytic and piezocatalytic performance of STO in environmental remediation. The materials were fully characterized using various physicochemical techniques, such as XRD, XPS, BET, UV-DRS, PL, SEM, TEM, and piezoelectric measurements, to assess their structural, optical, morphological and piezoelectric properties. The results revealed that Bi-STO induced lattice distortion, reduced band gap energy, enhanced charge separation efficiency, and improved piezoelectricity respect STO.

The activity of the as-prepared materials was investigated in the field of wastewater remediation through three different approaches: photocatalysis, piezocatalysis, and piezo-photocatalysis, applied in the ibuprofen (IBU) degradation, as well as in the photocatalytic removal of volatile organic compounds (VOCs) and nitrogen oxides (NOx) under different irradiation conditions. The results demonstrated that Bi-STO exhibited superior catalytic performance respect STO, achieving up to 60% IBU degradation under piezo-photocatalysis, thanks to the synergy between light and ultrasound. Furthermore, Bi-STO enabled the complete removal of ethanol and NOx and more than 90% propionic acid reduction under UV irradiation.

This study demonstrates the potential of Bi-STO as an efficient catalyst for environmental remediation, offering an alternative to conventional materials. The present work opens new possibilities for optimizing and improving wastewater treatment and air purification.

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超声辅助合成钛酸锶铋及其在环境修复中的应用

世界上的水和空气污染已成为一项全球性挑战，需要创新和可持续的战略。本文提出了超声辅助合成裸钛酸锶（STO）和掺杂铋的STO (Bi-STO)，以提高STO在环境修复中的光催化和压电催化性能。利用XRD、XPS、BET、UV-DRS、PL、SEM、TEM和压电等多种物理化学技术对材料进行了全面表征，以评估其结构、光学、形态和压电性能。结果表明，Bi-STO诱导了晶格畸变，降低了带隙能量，提高了电荷分离效率，并改善了STO的压电性。通过光催化、压电催化和压电-光催化三种不同的方法，考察了制备的材料在不同辐照条件下对布洛芬（ibuprofen， IBU）的降解以及光催化去除挥发性有机化合物（VOCs）和氮氧化物（NOx）的活性。结果表明，由于光和超声的协同作用，在压电光催化下，Bi-STO具有优于STO的催化性能，可实现高达60%的IBU降解。此外，在紫外线照射下，Bi-STO能够完全去除乙醇和NOx，并且丙酸还原率超过90%。这项研究证明了Bi-STO作为一种有效的环境修复催化剂的潜力，提供了传统材料的替代品。本工作为优化和改进废水处理和空气净化开辟了新的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ultrasonics Sonochemistry 化学-化学综合

CiteScore

15.80

自引率

11.90%

发文量

361

审稿时长

59 days

期刊介绍： Ultrasonics Sonochemistry stands as a premier international journal dedicated to the publication of high-quality research articles primarily focusing on chemical reactions and reactors induced by ultrasonic waves, known as sonochemistry. Beyond chemical reactions, the journal also welcomes contributions related to cavitation-induced events and processing, including sonoluminescence, and the transformation of materials on chemical, physical, and biological levels. Since its inception in 1994, Ultrasonics Sonochemistry has consistently maintained a top ranking in the "Acoustics" category, reflecting its esteemed reputation in the field. The journal publishes exceptional papers covering various areas of ultrasonics and sonochemistry. Its contributions are highly regarded by both academia and industry stakeholders, demonstrating its relevance and impact in advancing research and innovation.