具有双内电场的Nd-SrTiO3/SrCO3@Ag2O Z-scheme异质结的压电光催化去除污染物的设计

IF 8.4 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Management Pub Date : 2025-04-15 DOI:10.1016/j.jenvman.2025.125211

Jiayi Huang , Hongji Li , Chunjiao Hu , Jingmei Li , Xiulong Li , Dandan Wang , Dianming Ju

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引用次数: 0

摘要

随着环境污染问题的日益严重，开发高效、低成本的污染控制技术已成为一项紧迫的任务。本研究设计并制备了一种新型的用于压电光催化去除水中污染物的Nd-SrTiO3/SrCO3@Ag2O （Nd-SSTO/Ag2O）双内电场材料。在模拟日光照射下，材料表现出优异的光催化活性。其中，在单次可见光照射和单次超声振动下，2.5% Nd-SSTO/ ag20 -0.2在1 h内对RhB的降解率分别只有22.4%和25.6%。然而，当可见光和超声同时作用时，2.5% Nd-SSTO/ ag20 -0.2在1 h内对RhB的降解率达到95.1%，反应速率常数分别是SSTO和ag20的8.86倍和1.64倍。此外，经过4次循环实验，2.5% Nd-SSTO/ ag20 -0.2对RhB的降解效率保持在90%以上。此外，ICP分析表明，在降解过程中，催化剂元素释放到溶液中的量极低，表明制备的2.5% Nd-SSTO/ ag20 -0.2催化剂具有良好的稳定性。通过Nd掺杂，SSTO的光吸收范围从紫外区扩展到可见光区。诱导Ag2O后形成Nd-SSTO/Ag2O Z-scheme异质结，具有双内电场，不仅扩大了载流子传输通道，而且改善了光诱导载流子分离，使更多的e -和h+参与光催化降解反应。此外，SrTiO3 （STO）的压电特性进一步加速了e−-h+对的迁移。本研究为高效压电光催化材料的开发和制备开辟了新思路，也为环境污染控制提供了潜在的技术途径。

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Design of Nd-SrTiO3/SrCO3@Ag2O Z-scheme heterojunction with the dual internal electric field for piezo-photocatalytic removal of pollutants

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Design of Nd-SrTiO3/SrCO3@Ag2O Z-scheme heterojunction with the dual internal electric field for piezo-photocatalytic removal of pollutants

With the increasing severity of environmental pollution problems, developing efficient and low-cost pollution control technologies has become an urgent task. This study designed and prepared a novel Nd-SrTiO₃/SrCO₃@Ag₂O (Nd-SSTO/Ag₂O) dual internal electric field material for piezoelectric photocatalytic removal of pollutants from water. Under simulated sunlight irradiation, the material exhibited excellent photocatalytic activity. Among them, under single visible light irradiation and single ultrasound vibration, the degradation rate of RhB by 2.5 % Nd-SSTO/Ag₂O-0.2 only reached 22.4 % and 25.6 % in 1 h, respectively. However, when visible light and ultrasound vibration act simultaneously, the degradation rate of RhB by 2.5 % Nd-SSTO/Ag₂O-0.2 reached 95.1 % in 1 h with the reaction rate constants being 8.86 times and 1.64 times those of SSTO and Ag₂O respectively. Furthermore, after four cyclic experiments, the degradation efficiency of RhB by 2.5 % Nd-SSTO/Ag₂O-0.2 remained above 90 %. Additionally, ICP analysis revealed that the amount of catalyst elements released into the solution during the degradation process was extremely low, indicating that the prepared 2.5 % Nd-SSTO/Ag₂O-0.2 catalyst possesses good stability. Through Nd doping, the light absorption range of SSTO was extended from the ultraviolet region to the visible region. After inducing Ag₂O, a Nd-SSTO/Ag₂O Z-scheme heterojunction was formed with the dual internal electric field, which not only expanded the carrier transmission channel but also improved the photo-induced carrier separation, allowing more e⁻ and h⁺ to participate in the photocatalytic degradation reaction. Additionally, the piezoelectric characteristics of SrTiO₃ (STO) further accelerated the migration of e⁻-h⁺ pairs. This study opens up a new idea for the development and preparation of high-efficiency piezoelectric photocatalytic materials, and also provides a potential technical approach for environmental pollution control.

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来源期刊

Journal of Environmental Management 环境科学-环境科学

CiteScore

13.70

自引率

5.70%

发文量

2477

审稿时长

84 days

期刊介绍： The Journal of Environmental Management is a journal for the publication of peer reviewed, original research for all aspects of management and the managed use of the environment, both natural and man-made.Critical review articles are also welcome; submission of these is strongly encouraged.