Polarization electric field tuning interface electric field in full-spectral response double S-scheme heterojunction to drive synchronous removal of Cr(VI) and RBR X-3B

IF 12.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-08-05 DOI:10.1016/j.watres.2025.124332

Jing Bai , Xiangling Zhang , Chen Wang , Xuhao Li , Shilong Cao , Rong Zhang , Jiezhou Hu

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Abstract

Photocatalytic technology provides a sustainable development strategy for the synchronous removal of azo dyes and mordant leaching of Cr(VI). To mitigate the shielding effect of free carriers on the built-in electric field during the photocatalytic process, a double S-scheme piezo-photocatalyst Bi₂WO₆/BiOCl/Bi₂S₃ (BW-C-S) with full spectral response that can continuously respond to the ultrasound-guided polarized electric field to adjust the built-in electric field to promote the separation and migration of photogenerated carriers was developed. BW-C-S effectively overcame the barriers of carrier separation and migration by utilizing an ultrasonic-optical coupling field, achieving the rapid synchronous removal of reactive brilliant red X-3B (RBR X-3B) (0.057 min⁻¹) and Cr(VI) (0.063 min⁻¹). The synergistic reaction mechanism, potential degradation pathways, and the ecological toxicity of intermediates associated with the RBR X-3B/Cr(VI) synchronous removal process and the RBR X-3B independent degradation process were further elucidated through LC-MS analysis, DFT calculations, and toxicity evaluations. The continuous removal efficiency of pollutants by BW-C-S under dynamic hydraulic conditions was validated through the construction of a continuous flow reaction device, which provided theoretical support for the sustainable purification of various pollutants in complex aquatic environments.

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极化电场调谐全谱响应双s型异质结界面电场驱动Cr（VI）和RBR X-3B的同步去除

光催化技术为同步脱除偶氮染料和媒质浸出Cr（VI）提供了可持续发展的策略。为了减轻光催化过程中自由载流子对内置电场的屏蔽作用，研制了一种具有全光谱响应的双s型压电光催化剂Bi2WO6/BiOCl/Bi2S3 (BW-C-S)，该催化剂可以连续响应超声引导的极化电场，调节内置电场，促进光生载流子的分离和迁移。BW-C-S利用超声光耦合场有效克服了载流子分离和迁移的障碍，实现了活性艳红X-3B (RBR X-3B) （0.057 min−1）和Cr(VI) （0.063 min−1）的快速同步去除。通过LC-MS分析、DFT计算和毒性评价进一步阐明了RBR X-3B/Cr（VI）同步去除过程和RBR X-3B独立降解过程的协同反应机制、潜在降解途径以及中间体的生态毒性。通过构建连续流反应装置，验证了BW-C-S在动态水力条件下对污染物的连续去除效率，为复杂水生环境中各种污染物的持续净化提供理论支持。

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.