Solar-Activated ZnS@MXene Heterostructure for Integrated Radioactive Wastewater Treatment and Energy Harvesting

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-07-20 DOI:10.1016/j.watres.2025.124254

Yi-Lin Liu, Ping Cao, Qingyan Zhang, Changgui Guo, Jing Li, Qingyi Zeng

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Abstract

The presence of ubiquitous organic contaminants in radioactive wastewater poses formidable challenges for conventional uranium extraction technologies. Herein, we architect an auto-photopotential driven catalytic system (APDCS) through rational integration of ZnS@MXene/CF cathodes with monolithic photoanodes, achieving triple-functional uranium recovery, organic pollutant degradation, and simultaneous power generation from complex radioactive effluents. The ZnS@MXene heterostructure, synthesized via ZIF-8 sulfidation on MXene nanosheets, achieved 22-fold faster U(VI) extraction, 4.3× enhanced tetracycline degradation, and superior power density versus conventional CF cathodes. Ti-O-Zn bonds facilitated efficient electron transport, reducing charge resistance and boosting uranium reduction. Under natural sunlight, APDCS maintained 97 % UO₂²⁺ removal and 95 % TCH degradation efficiency, with <5 % performance decline over 15 cycles. This solar-powered platform, leveraging precise heterojunction nanoarchitecture, establishes a stable tri-functional synergy, offering a sustainable strategy for concurrent energy-water remediation and radioactive waste management.

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太阳能活化ZnS@MXene综合放射性废水处理和能量收集的异质结构

放射性废水中普遍存在的有机污染物对传统的铀提取技术提出了严峻的挑战。在此，我们通过将ZnS@MXene/CF阴极与单片光阳极合理集成，构建了一个自动光势驱动的催化系统（APDCS），实现了铀回收、有机污染物降解和复杂放射性废水同步发电的三重功能。与传统的CF阴极相比，通过ZIF-8硫化在MXene纳米片上合成的ZnS@MXene异质结构实现了22倍的U（VI）提取，4.3倍的四环素降解，以及更高的功率密度。Ti-O-Zn键促进了有效的电子传递，降低了电荷电阻，促进了铀的还原。在自然光照下，APDCS保持97%的UO22+去除率和95%的TCH降解效率，15次循环后性能下降5%。该太阳能平台利用精确的异质结纳米结构，建立了稳定的三功能协同作用，为能源-水修复和放射性废物管理提供了可持续的策略。

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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.